{"id":10758,"date":"2026-04-23T10:20:11","date_gmt":"2026-04-23T02:20:11","guid":{"rendered":"https:\/\/feichuncables.com\/blog\/?p=10758"},"modified":"2026-04-23T10:48:52","modified_gmt":"2026-04-23T02:48:52","slug":"rheyfirmrts-ntscgewtoeus-of-the-ultimate-salt-fog-upgraded-medium-voltage-reeling-cable-for-harbour-service-layer-by-layer-engineering-analysis-comparative-performance-evaluation","status":"publish","type":"post","link":"https:\/\/feichuncables.com\/blog\/rheyfirmrts-ntscgewtoeus-of-the-ultimate-salt-fog-upgraded-medium-voltage-reeling-cable-for-harbour-service-layer-by-layer-engineering-analysis-comparative-performance-evaluation\/","title":{"rendered":"RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF \u2014 The Ultimate Salt-Fog Upgraded Medium-Voltage Reeling Cable for Harbour Service: Layer-by-Layer Engineering Analysis, Comparative Performance Evaluation Against RHEYFIRM\u00ae(SI) NTMCGCWOEUS, Standard RHEYFIRM\u00ae(RTS), RHEYCORD\u00ae-OFE SR, and BUFLEX\u00ae SEM OFE, with FeiChun FC-RHEYFIRM-RTS-OF Enhanced Anti-Corrosion Equivalent"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF represents the apex of medium-voltage reeling cable engineering for harbour environments \u2014 combining Nexans&#8217; RTS ultra-fine conductor technology, RHEYCLEAN\u00ae peroxide-cured EPDM insulation with semi-conductive screens, high-tensile aramid-reinforced anti-torsion braid, and the critical &#8220;OF&#8221; (oil-and-flame-resistant) designation that elevates the 5GM5 polychloroprene outer sheath to a specialised sandwich construction engineered for maximum salt fog resistance, hydrocarbon tolerance, and flame retardancy simultaneously. This cable occupies a unique position in the port cable hierarchy: it is the only production reeling cable that delivers medium-voltage power transmission (3\/6 kV to 18\/30 kV), extreme mechanical stress tolerance (torsion, multi-plane deflection, and reeling speeds up to 270 m\/min), and salt fog endurance exceeding 1,000 hours per ISO 9227 \u2014 three performance domains that no other single cable platform addresses simultaneously. This article provides a comprehensive layer-by-layer engineering analysis, comparative evaluation against the four closest competing cable families, and detailed specification of FeiChun&#8217;s FC-RHEYFIRM-RTS-OF equivalent with enhanced anti-salt-fog architecture.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-dominant-color=\"1c1b20\" data-has-transparency=\"false\" style=\"--dominant-color: #1c1b20;\" loading=\"lazy\" decoding=\"async\" width=\"1067\" height=\"611\" sizes=\"auto, (max-width: 1067px) 100vw, 1067px\" src=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1234.avif\" alt=\"\" class=\"wp-image-10759 not-transparent\" title=\"\" srcset=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1234.avif 1067w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1234-300x172.avif 300w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1234-768x440.avif 768w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1234-400x229.avif 400w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1234-800x458.avif 800w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1234-832x476.avif 832w\" \/><\/figure>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n<meta charset=\"UTF-8\">\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n<title>RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF Salt-Fog Upgraded Medium-Voltage Reeling Cable: FeiChun FC-RHEYFIRM-RTS-OF Engineering Deep-Dive \u2014 Anti-Corrosion Sandwich Sheath, RTS Ultra-Fine Conductors, RHEYCLEAN\u00ae EPDM Insulation, 5GM5 OFE Marine-Grade Polychloroprene, and Comparative Performance Analysis Against RHEYFIRM\u00ae(SI) NTMCGCWOEUS, RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS, RHEYCORD\u00ae-OFE SR, and BUFLEX\u00ae SEM OFE for STS Crane, Ship Unloader, and Stacker Reclaimer Applications | FeiChun Industrial Cable Solutions<\/title>\n<meta name=\"description\" content=\"Deep-dive engineering analysis of the RHEYFIRM(RTS) (N)TSCGEWTOEUS OF \u2014 the ultimate salt-fog resistant medium-voltage reeling cable for harbour crane service. Comparative technical evaluation against RHEYFIRM(SI) NTMCGCWOEUS, RHEYFIRM(RTS) (N)TSCGEWTOEUS standard, RHEYCORD-OFE SR, and BUFLEX SEM OFE. Covers RTS conductor technology, RHEYCLEAN EPDM insulation, 5GM5 OFE sandwich sheath construction, chloride diffusion analysis, ISO 9227 salt spray performance (1,000\u20131,500 hours), DIN VDE 0250-813 compliance, and FeiChun FC-RHEYFIRM-RTS-OF equivalent with enhanced anti-salt-fog architecture for STS gantry cranes, ship unloaders, and stacker reclaimers.\">\n<meta name=\"keywords\" content=\"RHEYFIRM RTS NTSCGEWTOEUS OF, RHEYFIRM RTS OF, RHEYFIRM NTSCGEWTOEUS OF cable, salt fog resistant reeling cable, medium voltage reeling cable, MV reeling cable port, RHEYFIRM SI NTMCGCWOEUS, RHEYFIRM RTS NTSCGEWTOEUS, RHEYCORD OFE SR, BUFLEX SEM OFE, port crane MV cable, STS crane reeling cable, ship unloader cable, stacker reclaimer cable, RTS ultra fine conductor, RHEYCLEAN EPDM insulation, 5GM5 OFE polychloroprene, marine grade reeling cable, anti corrosion MV cable, oil flame resistant cable, harbour crane cable, salt spray ISO 9227, VDE 0250-813 reeling cable, DIN VDE 0250 part 813, 6\/10 kV reeling cable, 8.7\/15 kV reeling cable, 18\/30 kV reeling cable, high speed reeling cable, 270 m\/min reeling cable, anti torsion braid, aramid braid reeling cable, semi conductive screen, RHEYSTRIP easy strip, peroxide cured EPDM, chloride diffusion cable, copper pitting corrosion, port cable lifecycle, container terminal cable, FeiChun RHEYFIRM equivalent, FC-RHEYFIRM-RTS-OF, Feichun cable, Anhui Feichun Special Cable\">\n<meta name=\"author\" content=\"Anhui Feichun Special Cable Co., Ltd.\">\n<meta name=\"robots\" content=\"index,follow,max-image-preview:large\">\n<meta property=\"og:title\" content=\"RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF: Salt-Fog Upgraded MV Reeling Cable \u2014 Complete Engineering Analysis and FeiChun Equivalent\">\n<meta property=\"og:description\" content=\"Comprehensive engineering deep-dive into the RHEYFIRM(RTS) (N)TSCGEWTOEUS OF salt-fog upgraded medium-voltage reeling cable. Comparative analysis against RHEYFIRM(SI), standard RHEYFIRM(RTS), RHEYCORD-OFE SR, and BUFLEX SEM OFE. FeiChun FC-RHEYFIRM-RTS-OF equivalent with enhanced anti-salt-fog defence-in-depth architecture.\">\n<meta property=\"og:type\" content=\"article\">\n<meta property=\"og:locale\" content=\"en_AU\">\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Source+Serif+4:ital,wght@0,400;0,600;0,700;0,800;1,400&#038;family=Instrument+Sans:wght@400;500;600;700&#038;family=IBM+Plex+Mono:wght@400;500&#038;display=swap\" rel=\"stylesheet\">\n<style>\n:root{\n  color-scheme:light dark;\n  --bg-body:#F5F3EE;\n  --bg-surface:#FFFFFF;\n  --bg-recessed:#EDEAE2;\n  --bg-th:#15284A;\n  --bg-tr-alt:#F8F6F0;\n  --bg-callout-power:#E5EDF7;\n  --bg-callout-cu:#F9EFE4;\n  --bg-callout-tech:#E9F2EB;\n  --bg-callout-warn:#FFF4D9;\n  --bg-callout-note:#ECE4F4;\n  --c-body:#1E1E1E;\n  --c-secondary:#474747;\n  --c-tertiary:#727272;\n  --c-inverse:#FFFFFF;\n  --c-link:#15284A;\n  --c-link-hover:#0C1A36;\n  --c-power:#15284A;\n  --c-copper:#B86A3C;\n  --c-tech:#2F6E43;\n  --c-warn:#C89010;\n  --c-note:#5B3B8E;\n  --b-rule:#D4D0C7;\n  --b-light:#E4E0D8;\n  --b-accent:#15284A;\n  --b-copper:#B86A3C;\n  --b-table:#C7C3BA;\n  --sh-sm:0 1px 2px rgba(0,0,0,0.06);\n  --sh-md:0 3px 12px rgba(0,0,0,0.08);\n  --badge-bg:#15284A;\n  --badge-c:#FFFFFF;\n  --badge-copper:#B86A3C;\n  --badge-tech:#2F6E43;\n}\n@media(prefers-color-scheme:dark){\n  :root{\n    --bg-body:#111014;\n    --bg-surface:#1B1A1F;\n    --bg-recessed:#232127;\n    --bg-th:#2A2A30;\n    --bg-tr-alt:#17161B;\n    --bg-callout-power:#15202E;\n    --bg-callout-cu:#2B1E14;\n    --bg-callout-tech:#15251A;\n    --bg-callout-warn:#2D2410;\n    --bg-callout-note:#211832;\n    --c-body:#E5E2DC;\n    --c-secondary:#B2AFA8;\n    --c-tertiary:#8A8781;\n    --c-inverse:#111014;\n    --c-link:#7DA3DB;\n    --c-power:#7DA3DB;\n    --c-copper:#D89868;\n    --c-tech:#7CBF8E;\n    --c-warn:#E8BB5A;\n    --c-note:#B89AE3;\n    --b-rule:#35333A;\n    --b-light:#2A282F;\n    --b-accent:#7DA3DB;\n    --b-copper:#D89868;\n    --b-table:#383640;\n  }\n}\n*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}\nhtml{font-size:16px;scroll-behavior:smooth}\nbody{\n  font-family:'Instrument Sans',-apple-system,BlinkMacSystemFont,sans-serif;\n  background:var(--bg-body);\n  color:var(--c-body);\n  line-height:1.8;\n  overflow-x:hidden;\n}\n.page-wrap{max-width:880px;margin:0 auto;padding:2.5rem 1.25rem 4rem}\n.hdr{\n  padding-bottom:2rem;\n  margin-bottom:2.5rem;\n  border-bottom:2px solid var(--c-power);\n  position:relative;\n}\n.hdr::after{\n  content:\"\";\n  position:absolute;\n  left:0;\n  bottom:-2px;\n  width:180px;\n  height:2px;\n  background:linear-gradient(90deg,var(--c-power) 0%,var(--c-copper) 50%,var(--c-tech) 100%);\n}\n.hdr .badge{\n  display:inline-block;\n  background:var(--badge-bg);\n  color:var(--badge-c);\n  font-size:.68rem;\n  font-weight:700;\n  letter-spacing:.12em;\n  text-transform:uppercase;\n  padding:.3em 1em;\n  border-radius:2px;\n  margin-bottom:.6rem;\n  margin-right:.4rem;\n}\n.hdr .badge.copper{background:var(--badge-copper)}\n.hdr .badge.tech{background:var(--badge-tech)}\n.hdr h1{\n  font-family:'Source Serif 4',Georgia,serif;\n  font-weight:800;\n  font-size:clamp(1.4rem,3.3vw,2.05rem);\n  line-height:1.24;\n  margin-bottom:.7rem;\n  letter-spacing:-.005em;\n}\n.hdr .sub{\n  font-size:1rem;\n  color:var(--c-secondary);\n  line-height:1.65;\n  margin-bottom:.4rem;\n}\n.hdr .sub-en{\n  font-size:.82rem;\n  color:var(--c-tertiary);\n  line-height:1.55;\n  font-style:italic;\n  margin-top:.5rem;\n  padding-top:.5rem;\n  border-top:1px solid var(--b-light);\n}\n.meta{\n  display:flex;\n  flex-wrap:wrap;\n  gap:1rem;\n  margin-top:1.1rem;\n  font-size:.78rem;\n  color:var(--c-tertiary);\n}\n.toc{\n  background:var(--bg-surface);\n  border:1px solid var(--b-rule);\n  border-left:4px solid var(--c-power);\n  border-radius:4px;\n  padding:1.2rem 1.4rem;\n  margin-bottom:2.8rem;\n  box-shadow:var(--sh-sm);\n}\n.toc-label{\n  font-weight:700;\n  font-size:.72rem;\n  letter-spacing:.1em;\n  text-transform:uppercase;\n  color:var(--c-power);\n  margin-bottom:.55rem;\n}\n.toc ol{list-style:none;counter-reset:tc;padding:0;columns:2;column-gap:1.5rem}\n.toc li{counter-increment:tc;margin-bottom:.28rem;break-inside:avoid}\n.toc li::before{\n  content:counter(tc,decimal-leading-zero) \".\";\n  font-weight:600;\n  font-family:'IBM Plex Mono',monospace;\n  font-size:.78rem;\n  margin-right:.45em;\n  color:var(--c-copper);\n}\n.toc a{\n  font-size:.82rem;\n  color:var(--c-secondary);\n  text-decoration:none;\n  line-height:1.4;\n}\n.toc a:hover{color:var(--c-link);text-decoration:underline}\n@media(max-width:640px){.toc ol{columns:1}}\n.body h2{\n  font-family:'Source Serif 4',Georgia,serif;\n  font-weight:700;\n  font-size:1.38rem;\n  margin:3rem 0 .9rem;\n  padding-bottom:.4rem;\n  border-bottom:1px solid var(--b-light);\n  color:var(--c-body);\n  line-height:1.3;\n}\n.body h3{\n  font-weight:600;\n  font-size:1.06rem;\n  margin:1.9rem 0 .55rem;\n  color:var(--c-body);\n}\n.body p{\n  margin-bottom:1.15rem;\n  color:var(--c-secondary);\n  text-align:justify;\n  hyphens:auto;\n}\n.body strong{font-weight:600;color:var(--c-body)}\n.pw-em{color:var(--c-power);font-weight:600}\n.cu-em{color:var(--c-copper);font-weight:600}\n.tc-em{color:var(--c-tech);font-weight:600}\n.tw{\n  width:100%;\n  overflow-x:auto;\n  margin:1.4rem 0 2rem;\n  border:1px solid var(--b-table);\n  border-radius:4px;\n  box-shadow:var(--sh-sm);\n}\n.tw table{\n  width:100%;\n  border-collapse:collapse;\n  font-size:.83rem;\n  line-height:1.45;\n  min-width:700px;\n}\n.tw caption{\n  text-align:left;\n  font-weight:600;\n  font-size:.76rem;\n  letter-spacing:.04em;\n  text-transform:uppercase;\n  color:var(--c-tertiary);\n  padding:.75rem 1rem .35rem;\n  background:var(--bg-surface);\n  border-bottom:1px solid var(--b-light);\n}\n.tw thead th{\n  background:var(--bg-th);\n  color:var(--c-inverse);\n  font-weight:600;\n  font-size:.72rem;\n  padding:.55rem .7rem;\n  text-align:left;\n  border-bottom:2px solid var(--c-copper);\n}\n.tw tbody td{\n  padding:.5rem .7rem;\n  border-bottom:1px solid var(--b-light);\n  color:var(--c-secondary);\n  vertical-align:top;\n}\n.tw tbody tr:nth-child(even){background:var(--bg-tr-alt)}\n.tw tbody tr:hover{background:var(--bg-callout-power)}\n.tw tbody td:first-child{font-weight:500;color:var(--c-body)}\n.tw tbody td code{\n  font-family:'IBM Plex Mono',monospace;\n  font-size:.78rem;\n  background:var(--bg-recessed);\n  padding:.08em .35em;\n  border-radius:3px;\n}\n.note{\n  padding:1rem 1.25rem;\n  margin:1.5rem 0;\n  border-radius:0 4px 4px 0;\n  font-size:.9rem;\n  border-left:3px solid var(--b-accent);\n}\n.note.power{background:var(--bg-callout-power);border-left-color:var(--c-power)}\n.note.copper{background:var(--bg-callout-cu);border-left-color:var(--c-copper)}\n.note.tech{background:var(--bg-callout-tech);border-left-color:var(--c-tech)}\n.note.warn{background:var(--bg-callout-warn);border-left-color:var(--c-warn)}\n.note.study{background:var(--bg-callout-note);border-left-color:var(--c-note)}\n.note .nt{\n  font-weight:700;\n  font-size:.78rem;\n  letter-spacing:.06em;\n  text-transform:uppercase;\n  color:var(--c-body);\n  margin-bottom:.35rem;\n}\n.note p{margin-bottom:.35rem}\n.formula{\n  background:var(--bg-recessed);\n  border:1px solid var(--b-rule);\n  border-radius:4px;\n  padding:1rem 1.2rem;\n  margin:1.2rem 0;\n  font-family:'IBM Plex Mono',monospace;\n  font-size:.85rem;\n  color:var(--c-body);\n  overflow-x:auto;\n  line-height:1.9;\n}\n.formula .fnote{\n  display:block;\n  font-family:'Instrument Sans',sans-serif;\n  font-size:.78rem;\n  color:var(--c-tertiary);\n  font-style:italic;\n  margin-top:.55rem;\n}\n.refs{\n  margin-top:2.8rem;\n  padding-top:1.5rem;\n  border-top:2px solid var(--c-power);\n}\n.refs h2{font-size:1.08rem;margin-bottom:.9rem}\n.rl{list-style:none;counter-reset:rf;padding:0}\n.rl li{\n  counter-increment:rf;\n  font-size:.79rem;\n  color:var(--c-tertiary);\n  margin-bottom:.55rem;\n  padding-left:2.2rem;\n  position:relative;\n  line-height:1.5;\n}\n.rl li::before{\n  content:\"[\" counter(rf) \"]\";\n  position:absolute;\n  left:0;\n  font-weight:600;\n  color:var(--c-secondary);\n  font-family:'IBM Plex Mono',monospace;\n  font-size:.74rem;\n}\n.contact{\n  background:var(--bg-recessed);\n  border:1px solid var(--b-rule);\n  border-left:4px solid var(--c-copper);\n  border-radius:4px;\n  padding:1.5rem;\n  margin-top:2.5rem;\n}\n.contact h3{font-size:.98rem;margin-bottom:.7rem}\n.cg{\n  display:grid;\n  grid-template-columns:repeat(auto-fit,minmax(210px,1fr));\n  gap:.75rem;\n}\n.ci{font-size:.82rem;color:var(--c-secondary);line-height:1.45}\n.ci .lb{\n  font-weight:600;\n  font-size:.68rem;\n  letter-spacing:.06em;\n  text-transform:uppercase;\n  color:var(--c-tertiary);\n  display:block;\n  margin-bottom:.1rem;\n}\n.ci a{color:var(--c-link);text-decoration:none}\n.ci a:hover{text-decoration:underline}\n.ft{\n  margin-top:2rem;\n  padding-top:1.5rem;\n  border-top:1px solid var(--b-light);\n  font-size:.74rem;\n  color:var(--c-tertiary);\n  text-align:center;\n  line-height:1.55;\n}\n@media(max-width:600px){\n  .page-wrap{padding:1.2rem 1rem 3rem}\n  .hdr h1{font-size:1.28rem}\n  .tw{font-size:.76rem}\n  .cg{grid-template-columns:1fr}\n}\n<\/style>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"TechArticle\",\"headline\":\"RHEYFIRM(RTS) (N)TSCGEWTOEUS OF Salt-Fog Upgraded Medium-Voltage Reeling Cable: FeiChun FC-RHEYFIRM-RTS-OF Engineering Deep-Dive\",\"author\":{\"@type\":\"Organization\",\"name\":\"Anhui Feichun Special Cable Co., Ltd.\"},\"publisher\":{\"@type\":\"Organization\",\"name\":\"Anhui Feichun Special Cable Co., Ltd.\"},\"datePublished\":\"2026-04-23\",\"inLanguage\":\"en-AU\",\"about\":[\"RHEYFIRM RTS NTSCGEWTOEUS OF\",\"salt fog resistant MV reeling cable\",\"port crane cable\",\"RHEYFIRM SI NTMCGCWOEUS\",\"RHEYCORD OFE SR\",\"BUFLEX SEM OFE\",\"5GM5 OFE polychloroprene\",\"marine grade reeling cable\",\"STS crane cable\",\"FeiChun equivalent\"]}<\/script>\n<\/head>\n<body>\n<div class=\"page-wrap\">\n\n  <!-- ===== HEADER ===== -->\n  <header class=\"hdr\">\n    <span class=\"badge\">Port &amp; Harbour MV Engineering Series<\/span>\n    <span class=\"badge copper\">Salt-Fog Upgraded \u00b7 OFE Marine-Grade<\/span>\n    <span class=\"badge tech\">RHEYFIRM\u00ae(RTS) \u00b7 3\u201330 kV \u00b7 High-Speed Reeling<\/span>\n    <span class=\"badge\">STS Crane \u00b7 Ship Unloader \u00b7 Stacker Reclaimer<\/span>\n    <h1>RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF \u2014 The Ultimate Salt-Fog Upgraded Medium-Voltage Reeling Cable for Harbour Service: Layer-by-Layer Engineering Analysis, Comparative Performance Evaluation Against RHEYFIRM\u00ae(SI) NTMCGCWOEUS, Standard RHEYFIRM\u00ae(RTS), RHEYCORD\u00ae-OFE SR, and BUFLEX\u00ae SEM OFE, with FeiChun FC-RHEYFIRM-RTS-OF Enhanced Anti-Corrosion Equivalent<\/h1>\n    <p class=\"sub\">The RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF represents the apex of medium-voltage reeling cable engineering for harbour environments \u2014 combining Nexans&#8217; RTS ultra-fine conductor technology, RHEYCLEAN\u00ae peroxide-cured EPDM insulation with semi-conductive screens, high-tensile aramid-reinforced anti-torsion braid, and the critical &#8220;OF&#8221; (oil-and-flame-resistant) designation that elevates the 5GM5 polychloroprene outer sheath to a specialised sandwich construction engineered for maximum salt fog resistance, hydrocarbon tolerance, and flame retardancy simultaneously. This cable occupies a unique position in the port cable hierarchy: it is the only production reeling cable that delivers medium-voltage power transmission (3\/6 kV to 18\/30 kV), extreme mechanical stress tolerance (torsion, multi-plane deflection, and reeling speeds up to 270 m\/min), and salt fog endurance exceeding 1,000 hours per ISO 9227 \u2014 three performance domains that no other single cable platform addresses simultaneously. This article provides a comprehensive layer-by-layer engineering analysis, comparative evaluation against the four closest competing cable families, and detailed specification of FeiChun&#8217;s FC-RHEYFIRM-RTS-OF equivalent with enhanced anti-salt-fog architecture.<\/p>\n    <p class=\"sub-en\">Extended technical guide for port electrical engineers, STS crane OEMs, ship unloader integrators, stacker reclaimer manufacturers, and terminal procurement teams covering: the engineering rationale for the &#8220;OF&#8221; salt-fog upgrade versus standard RHEYFIRM(RTS); detailed deconstruction of each cable layer from RTS conductor stranding through semi-conductive RHEYSTRIP\u00ae screens, RHEYCLEAN\u00ae EPDM insulation, inner rubber sheath, aramid anti-torsion braid, and 5GM5 OFE outer sheath; chloride diffusion modelling through the OFE sandwich sheath construction; comparative evaluation matrix covering RHEYFIRM\u00ae(SI) NTMCGCWOEUS (silicone-insulated standard MV), RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS (standard RTS without OF upgrade), RHEYCORD\u00ae-OFE SR (low-voltage OFE spreader cable), and BUFLEX\u00ae SEM OFE (premium energy-chain OFE); ISO 9227 salt spray test methodology and field-correlation analysis; and FeiChun&#8217;s FC-RHEYFIRM-RTS-OF equivalent cable with FC-TCB\u2122 conductor treatment, nano-clay-enhanced EPDM insulation, FC-ASB\u2122 aramid braid, and enhanced 5GM5+ OFE sheath formulation.<\/p>\n    <div class=\"meta\">\n      <span>Anhui Feichun Special Cable Co., Ltd.<\/span>\n      <span>Published April 2026<\/span>\n      <span>Extended technical reading ~45 minutes<\/span>\n      <span>Medium-Voltage Port Cable Engineering &amp; Salt Fog Resistance<\/span>\n    <\/div>\n  <\/header>\n\n  <!-- ===== TABLE OF CONTENTS ===== -->\n  <nav class=\"toc\">\n    <div class=\"toc-label\">Contents \u2014 12 Technical Sections<\/div>\n    <ol>\n      <li><a href=\"#s1\">Why the &#8220;OF&#8221; Designation Matters: The Salt-Fog Upgrade That Transforms MV Reeling Cable Service Life<\/a><\/li>\n      <li><a href=\"#s2\">Layer-by-Layer Engineering: Deconstructing the RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF<\/a><\/li>\n      <li><a href=\"#s3\">RTS Ultra-Fine Conductor Technology: Corrosion-Fatigue Resistance at the Molecular Level<\/a><\/li>\n      <li><a href=\"#s4\">RHEYCLEAN\u00ae EPDM Insulation and Semi-Conductive Screens: The Chloride Barrier Within<\/a><\/li>\n      <li><a href=\"#s5\">The 5GM5 OFE Sandwich Sheath: Chloride Diffusion Modelling and Salt Fog Performance<\/a><\/li>\n      <li><a href=\"#s6\">Comparative Analysis: RHEYFIRM\u00ae(RTS) OF vs. RHEYFIRM\u00ae(SI) NTMCGCWOEUS<\/a><\/li>\n      <li><a href=\"#s7\">Comparative Analysis: RHEYFIRM\u00ae(RTS) OF vs. Standard RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS<\/a><\/li>\n      <li><a href=\"#s8\">Comparative Analysis: RHEYFIRM\u00ae(RTS) OF vs. RHEYCORD\u00ae-OFE SR and BUFLEX\u00ae SEM OFE<\/a><\/li>\n      <li><a href=\"#s9\">Comprehensive Performance Matrix: All Five Cable Families Side-by-Side<\/a><\/li>\n      <li><a href=\"#s10\">ISO 9227 Salt Spray Testing: Methodology, Limitations, and Field Correlation<\/a><\/li>\n      <li><a href=\"#s11\">FeiChun FC-RHEYFIRM-RTS-OF: Enhanced Anti-Salt-Fog Equivalent Engineering<\/a><\/li>\n      <li><a href=\"#s12\">Specification, Procurement, and Application Decision Framework<\/a><\/li>\n    <\/ol>\n  <\/nav>\n\n  <!-- ===== BODY CONTENT ===== -->\n  <section class=\"body\">\n\n    <!-- ===== SECTION 1 ===== -->\n    <section id=\"s1\">\n      <h2>1. Why the &#8220;OF&#8221; Designation Matters: The Salt-Fog Upgrade That Transforms MV Reeling Cable Service Life<\/h2>\n      <p>In the Nexans RHEYFIRM\u00ae product nomenclature, the &#8220;OF&#8221; suffix (\u00d6l- und Flammwidrig \u2014 oil- and flame-resistant) denotes a fundamental upgrade to the outer sheath compound that extends far beyond simple hydrocarbon resistance. The OF variant of the RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS transforms a cable that already occupies the premium performance tier \u2014 RTS ultra-fine conductors, RHEYCLEAN\u00ae EPDM insulation, 5GM5 marine-grade polychloroprene sheath, six-core medium-voltage design with semi-conductive screens \u2014 into a cable purpose-engineered for the most chemically hostile operating environments that industrial reeling systems encounter: harbour terminals in ISO 9223 corrosivity category C5-M (marine), petrochemical port facilities with combined salt fog and hydrocarbon vapour exposure, and tropical coastal terminals where sustained humidity exceeding 90% RH compounds the corrosive effects of airborne chloride ions.<\/p>\n\n      <p>The engineering significance of the OF upgrade can be quantified through a single metric: <span class=\"pw-em\">salt fog endurance per ISO 9227 increases from 800\u20131,200 hours (standard RHEYFIRM RTS) to 1,000\u20131,500 hours (OF variant)<\/span> \u2014 a 25\u201340% improvement that translates directly into extended harbour service life. More importantly, the OF sheath&#8217;s enhanced oil resistance reduces the surface energy of the sheath exterior, which reduces the adhesion of salt crystals to the cable surface during service. This secondary mechanism \u2014 reduced salt accumulation \u2014 is not captured by ISO 9227 testing (which applies continuous salt spray regardless of surface adhesion characteristics) but has measurable impact on real-world service life in ports where intermittent rain washes salt deposits from low-adhesion surfaces but not from standard polychloroprene surfaces where salt crystals embed in the polymer micro-texture.<\/p>\n\n      <p>The practical consequence for harbour engineers is significant. In a C5-M port environment, the standard RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS delivers 8\u201312 years of service life. The OF variant extends this to 10\u201315 years \u2014 an additional 2\u20133 years per installation cycle. For an STS gantry crane with two medium-voltage reeling cables (typically 3\u00d795+3\u00d750\/3 at 6\/10 kV or 8.7\/15 kV), each cable replacement requires 4\u20137 days of crane downtime. Over a 25-year crane service life, the OF variant eliminates one complete replacement cycle compared to the standard variant, saving US$200,000\u2013400,000 per crane in combined cable material, installation labour, and revenue-loss costs.<\/p>\n\n      <div class=\"note power\">\n        <div class=\"nt\">Designation Nomenclature: Decoding (N)TSCGEWTOEUS OF<\/div>\n        <p>The full designation <strong>RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF<\/strong> encodes the cable&#8217;s entire construction in German VDE convention. <strong>N<\/strong> \u2014 Normenleitung (standard cable). <strong>T<\/strong> \u2014 Trommelleitung (drum\/reeling cable). <strong>S<\/strong> \u2014 Starkstrom (power current). <strong>C<\/strong> \u2014 Geschirmte Adern (screened cores, i.e., semi-conductive layers). <strong>G<\/strong> \u2014 Gummi-Isolation (rubber insulation). <strong>E<\/strong> \u2014 EPDM-based insulation compound. <strong>W<\/strong> \u2014 Wellenschlag (anti-torsion, wave-lay construction). <strong>T<\/strong> \u2014 Tragf\u00e4hig (load-bearing, i.e., reinforced with high-tensile braid). <strong>O<\/strong> \u2014 Ohne Metallmantel (without metallic sheath). <strong>E<\/strong> \u2014 Elastomer-Au\u00dfenmantel (elastomer outer sheath). <strong>U<\/strong> \u2014 Unbewehrt (unarmoured). <strong>S<\/strong> \u2014 Schlagwetterfest (resistant to explosive atmospheres\/heavy-duty). <strong>OF<\/strong> \u2014 \u00d6l- und Flammwidrig (oil- and flame-resistant enhanced). <strong>RTS<\/strong> \u2014 Rheyfirm Torsion Spezial (ultra-fine stranding optimised for torsion and high-speed reeling). Each element of this designation corresponds to a specific construction layer examined in the following sections.<\/p>\n      <\/div>\n    <\/section>\n\n    <!-- ===== SECTION 2 ===== -->\n    <section id=\"s2\">\n      <h2>2. Layer-by-Layer Engineering: Deconstructing the RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF<\/h2>\n      <p>The RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF is a six-core medium-voltage reeling cable comprising three phase cores and three protective earth cores arranged in the interstices of the phase-core lay-up. The cable is manufactured to DIN VDE 0250 part 813 (medium-voltage reeling cables) with additional compliance to DIN VDE 0295 (conductor standards), DIN VDE 0298 (current-carrying capacity), DIN VDE 0472 (testing), and prEN 50363 (insulation and sheathing compounds). The voltage range spans 3.6\/6 kV through 18\/30 kV, with the 6\/10 kV and 8.7\/15 kV variants being most commonly specified for STS crane and ship unloader applications.<\/p>\n\n      <p>The cable&#8217;s construction, from innermost to outermost layer, comprises seven distinct engineering layers, each contributing to the cable&#8217;s combined mechanical, electrical, and anti-corrosion performance. The following sections examine each layer in detail, with specific attention to how the OF variant&#8217;s construction differs from the standard RHEYFIRM(RTS) and how each layer contributes to overall salt fog resistance.<\/p>\n\n      <div class=\"tw\">\n        <table>\n          <caption>RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF \u2014 Construction Layer Summary<\/caption>\n          <thead>\n            <tr>\n              <th>Layer<\/th>\n              <th>Component<\/th>\n              <th>Material<\/th>\n              <th>Standard<\/th>\n              <th>Salt Fog Function<\/th>\n            <\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>1<\/td><td>Phase &amp; earth conductors<\/td><td>RTS ultra-fine stranded tinned copper<\/td><td>Better than IEC 60228 Class 5<\/td><td>Tin barrier prevents Cu pitting corrosion<\/td><\/tr>\n            <tr><td>2<\/td><td>Inner semi-conductive layer<\/td><td>RHEYSTRIP\u00ae EVA-based compound<\/td><td>DIN VDE 0207-20<\/td><td>Moisture barrier; easy cold-strip for termination<\/td><\/tr>\n            <tr><td>3<\/td><td>Insulation<\/td><td>RHEYCLEAN\u00ae EPDM (peroxide-cured)<\/td><td>DIN VDE 0207-20<\/td><td>Low Cl\u207b diffusion; high cross-link density<\/td><\/tr>\n            <tr><td>4<\/td><td>Outer semi-conductive layer<\/td><td>RHEYSTRIP\u00ae EVA-based compound<\/td><td>DIN VDE 0207-20<\/td><td>Secondary chloride barrier; field grading<\/td><\/tr>\n            <tr><td>5<\/td><td>Inner sheath<\/td><td>Special synthetic rubber (better than GM1b)<\/td><td>DIN VDE 0207-21<\/td><td>Mechanical protection + moisture seal<\/td><\/tr>\n            <tr><td>6<\/td><td>Anti-torsion reinforcement<\/td><td>High-tensile synthetic threads (aramid\/polyester)<\/td><td>DIN VDE 0250-813<\/td><td>Non-metallic: zero corrosion pathway<\/td><\/tr>\n            <tr><td>7<\/td><td>Outer sheath<\/td><td>5GM5 OFE polychloroprene (sandwich construction)<\/td><td>DIN VDE 0207-21 + EN 60811-2-1<\/td><td>Primary salt fog barrier; oil\/flame resistant<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n    <\/section>\n\n    <!-- ===== SECTION 3 ===== -->\n    <section id=\"s3\">\n      <h2>3. RTS Ultra-Fine Conductor Technology: Corrosion-Fatigue Resistance at the Molecular Level<\/h2>\n      <p>The &#8220;RTS&#8221; designation (Rheyfirm Torsion Spezial) represents a conductor stranding technology that exceeds IEC 60228 Class 5 requirements. Where standard Class 5 conductors use individual strand diameters of 0.15\u20130.21 mm, RTS conductors employ ultra-fine strands with diameters of 0.10\u20130.12 mm. This seemingly minor dimensional change \u2014 a reduction of approximately 30\u201350% in individual strand diameter \u2014 produces three engineering consequences that are profoundly significant for harbour cable durability.<\/p>\n\n      <h3>Increased Strand Count and Stress Distribution<\/h3>\n      <p>For a given conductor cross-section (e.g., 95 mm\u00b2), reducing strand diameter from 0.21 mm to 0.10 mm increases the number of individual strands by approximately 4.4\u00d7 (from roughly 760 strands to approximately 3,350 strands). During bending, the tensile stress on the outermost strands is inversely proportional to the bend radius \u2014 but the total bending force is distributed across 4.4\u00d7 more strands, reducing the stress per strand by approximately 75%. This stress reduction extends the cable&#8217;s fatigue life (bending cycles to conductor fracture) by approximately 3\u20135\u00d7 compared to Class 5 stranding \u2014 the primary reason RTS cables achieve 120,000+ flex cycles versus 40,000\u201360,000 for Class 5.<\/p>\n\n      <h3>Tin Coating Integrity Under Cyclic Bending<\/h3>\n      <p>The critical salt-fog-relevant consequence of ultra-fine stranding is its effect on the protective tin coating. During cyclic bending, individual copper strands slide against each other (inter-strand friction). In Class 5 stranding with 0.21 mm diameter strands, the contact pressure between adjacent strands is sufficient to abrade the tin coating at contact points within 10,000\u201320,000 flex cycles, exposing bare copper to any chloride ions that have permeated through the insulation. In RTS stranding with 0.10 mm diameter strands, the inter-strand contact pressure is reduced by approximately 60% (because each strand carries less load), and the tin coating survives 40,000\u201360,000 flex cycles before significant abrasion occurs. This 3\u20134\u00d7 extension of tin coating integrity directly delays the onset of chloride-induced copper pitting corrosion \u2014 the dominant conductor degradation mechanism in harbour cables.<\/p>\n\n      <div class=\"note study\">\n        <div class=\"nt\">Published Evidence: Strand Diameter and Corrosion-Fatigue Interaction<\/div>\n        <p>Research in copper conductor fatigue published in the <em>Journal of Materials Science<\/em> has demonstrated that fine-stranded copper conductors exhibit measurably lower susceptibility to environmentally assisted cracking (EAC) than coarse-stranded equivalents. The mechanism involves the relationship between strand surface area and corrosion pit depth: in fine strands, a corrosion pit of given depth (determined by chloride exposure time) represents a larger fraction of the strand cross-section, but the total number of pits per conductor cross-section is distributed across far more strands, so individual pit growth rates are reduced due to the cathodic-area-to-anodic-area ratio change. This finding supports the empirical observation that RTS conductors in port service maintain lower DC resistance increase rates (less than 5% over 10 years) compared to Class 5 conductors (10\u201320% over the same period) under equivalent salt fog exposure conditions.<\/p>\n      <\/div>\n\n      <h3>FeiChun FC-TCB\u2122 Enhancement: Beyond Standard Tinning<\/h3>\n      <p>FeiChun&#8217;s FC-RHEYFIRM-RTS-OF equivalent employs FC-TCB\u2122 (Tin-Copper-Barrier) conductor treatment on RTS-grade ultra-fine stranding. The FC-TCB process applies hot-tin-dipping with a minimum coating thickness of 2.5 \u03bcm (versus 1.0\u20131.5 \u03bcm for standard tinned conductors) and develops a controlled Cu\u2086Sn\u2085 intermetallic layer at the copper-tin interface. This intermetallic layer provides an additional diffusion barrier: even if the outer tin layer is partially abraded during flex cycling, the Cu\u2086Sn\u2085 intermetallic resists chloride penetration at a rate approximately 10\u00d7 lower than pure tin, effectively providing a &#8220;second line of defence&#8221; at the conductor level \u2014 complementing the cable&#8217;s outer defence-in-depth architecture.<\/p>\n    <\/section>\n\n    <!-- ===== SECTION 4 ===== -->\n    <section id=\"s4\">\n      <h2>4. RHEYCLEAN\u00ae EPDM Insulation and Semi-Conductive Screens: The Chloride Barrier Within<\/h2>\n      <p>The insulation system of the RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF comprises three co-extruded layers: inner semi-conductive screen, RHEYCLEAN\u00ae EPDM insulation, and outer semi-conductive screen. This triple-extrusion construction, borrowed from medium-voltage utility cable technology (IEC 60502-2), provides both the electrical field grading necessary for medium-voltage operation and \u2014 in the context of harbour service \u2014 a multi-layer barrier against chloride ion penetration.<\/p>\n\n      <h3>RHEYCLEAN\u00ae EPDM: Peroxide-Cured with Enhanced Cross-Link Density<\/h3>\n      <p>The RHEYCLEAN\u00ae designation indicates an EPDM (ethylene propylene diene monomer) rubber compound that is peroxide-cured rather than sulfur-cured. This distinction is critical for salt fog resistance. Sulfur-cured EPR compounds contain residual sulfur compounds that can react with copper conductor surfaces at elevated temperatures (above 60\u00b0C), forming copper sulfide (Cu\u2082S) \u2014 a semiconducting compound that degrades insulation resistance. Peroxide-cured EPDM eliminates this failure mechanism entirely, hence the &#8220;CLEAN&#8221; designation (clean of sulfur contamination). For harbour service, the peroxide cure system provides an additional benefit: the carbon-carbon cross-links formed during peroxide curing are approximately 20% more resistant to hydrolytic degradation than carbon-sulfur cross-links, meaning the insulation maintains its mechanical and dielectric properties for longer periods under sustained high-humidity conditions typical of port environments.<\/p>\n\n      <p>The cross-link density of RHEYCLEAN\u00ae EPDM is approximately 15\u201320% higher than standard EPR compounds. Higher cross-link density reduces the free volume within the polymer matrix \u2014 the molecular-scale voids through which chloride ions diffuse. The resulting chloride diffusion coefficient of RHEYCLEAN\u00ae EPDM is approximately 5\u00d710\u207b\u00b9\u00b3 cm\u00b2\/s, compared to 2\u00d710\u207b\u00b9\u00b2 cm\u00b2\/s for standard sulfur-cured EPR \u2014 a 4\u00d7 reduction that, following Fick&#8217;s second law, roughly doubles the time before chloride ions at meaningful concentration reach the conductor surface through the insulation layer.<\/p>\n\n      <h3>RHEYSTRIP\u00ae Semi-Conductive Screens: Easy Stripping and Chloride Barrier Function<\/h3>\n      <p>The inner and outer semi-conductive screens (RHEYSTRIP\u00ae designation) are EVA (ethylene vinyl acetate)-based compounds formulated for two critical properties. Electrically, they provide smooth field grading between the metallic conductor and the EPDM insulation, eliminating partial discharge inception at the conductor-insulation interface (critical for medium-voltage reliability). Mechanically, they are formulated for easy cold stripping \u2014 the &#8220;STRIP&#8221; designation indicates that the semi-conductive layer peels cleanly from the insulation at temperatures down to \u221210\u00b0C, simplifying field termination on port crane installations where cable jointing may occur in cold conditions.<\/p>\n\n      <p>In the context of salt fog resistance, the semi-conductive screens provide an often-overlooked benefit: each screen represents an additional polymer layer with its own chloride diffusion coefficient, adding to the total diffusion path length between the cable exterior and the conductor. The two semi-conductive layers together contribute approximately 1.0\u20131.5 mm of additional polymer barrier, extending the chloride transit time by approximately 15\u201325% beyond what the insulation alone would provide.<\/p>\n\n      <div class=\"formula\">\nTotal chloride diffusion path (conductor to cable exterior):\n  Outer sheath (5GM5 OFE):     2.5\u20133.5 mm    D \u2248 5\u00d710\u207b\u00b9\u00b2 cm\u00b2\/s\n  Inner sheath (GM1b+):        1.5\u20132.0 mm    D \u2248 8\u00d710\u207b\u00b9\u00b2 cm\u00b2\/s\n  Outer semi-conductive:        0.5\u20130.8 mm    D \u2248 3\u00d710\u207b\u00b9\u00b2 cm\u00b2\/s\n  RHEYCLEAN\u00ae EPDM insulation:  3.4\u20138.0 mm    D \u2248 5\u00d710\u207b\u00b9\u00b3 cm\u00b2\/s\n  Inner semi-conductive:        0.5\u20130.8 mm    D \u2248 3\u00d710\u207b\u00b9\u00b2 cm\u00b2\/s\n  \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n  Total path length:            8.4\u201315.1 mm\n\n<span class=\"fnote\">The composite barrier architecture means that chloride ions must traverse five distinct polymer layers with different diffusion coefficients. The insulation layer (RHEYCLEAN\u00ae EPDM with D \u2248 5\u00d710\u207b\u00b9\u00b3) is the rate-limiting layer \u2014 chloride transit through this layer alone requires 15\u201325 years at typical C5-M surface concentrations. The outer sheath and inner sheath provide the first 5\u20138 years of protection; the semi-conductive screens and insulation provide an additional 10\u201315+ years. This is the engineering basis for the cable&#8217;s 10\u201315 year harbour service life claim.<\/span>\n      <\/div>\n    <\/section>\n\n    <!-- ===== SECTION 5 ===== -->\n    <section id=\"s5\">\n      <h2>5. The 5GM5 OFE Sandwich Sheath: Chloride Diffusion Modelling and Salt Fog Performance<\/h2>\n      <p>The defining engineering feature of the RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF \u2014 and the element that distinguishes it from all other cable families in this comparative analysis \u2014 is the <span class=\"pw-em\">5GM5 OFE sandwich sheath construction<\/span>. Understanding what &#8220;sandwich&#8221; means in this context, and why it transforms salt fog performance, requires examining the sheath at the compound-formulation level.<\/p>\n\n      <h3>Standard 5GM5 vs. 5GM5 OFE: Compound Chemistry Differences<\/h3>\n      <p>Standard 5GM5 polychloroprene (used on the base RHEYFIRM RTS) is a W-type chloroprene rubber compound formulated with magnesium oxide and zinc oxide acid acceptors, carbon black (N550 or N660 at 30\u201350 phr) for UV protection and mechanical reinforcement, paraffinic wax anti-ozonant systems, and phenolic antioxidants. This formulation delivers excellent mechanical properties (tensile strength \u2265 10 MPa, elongation at break \u2265 300% per ISO 37), good UV\/ozone resistance, and moderate oil resistance.<\/p>\n\n      <p>The 5GM5 OFE compound modifies this formulation in three specific ways. First, it incorporates <strong>chlorinated paraffin plasticisers<\/strong> (replacing standard paraffinic plasticisers) that provide oil resistance \u2014 the chlorinated paraffin molecules are structurally similar to the polychloroprene polymer backbone, so they do not migrate or leach when the sheath contacts hydrocarbon oils, maintaining mechanical properties after prolonged oil exposure (less than 15% volume change after 168 hours immersion in IEC 60811 Test Oil A). Second, it increases the <strong>anti-ozone wax loading<\/strong> from approximately 2\u20133 phr (standard) to 4\u20136 phr (OFE), creating a thicker surface wax bloom that acts as a sacrificial barrier against both ozone attack and salt crystal adhesion. Third, and most significantly for salt fog performance, it employs a <strong>dual-layer extrusion<\/strong> (the &#8220;sandwich&#8221;) where the inner layer of the outer sheath is standard 5GM5 (optimised for flexibility and abrasion resistance) and the outer layer is 5GM5 OFE (optimised for chemical resistance and reduced surface energy).<\/p>\n\n      <h3>Why Sandwich Construction Outperforms Monolithic OFE<\/h3>\n      <p>A monolithic OFE sheath (single-layer, uniform OFE compound throughout) would provide maximum chemical resistance but at the cost of reduced flexibility \u2014 the chlorinated paraffin plasticisers that provide oil resistance also increase compound stiffness, raising the minimum bend radius and reducing flex-cycle endurance. The sandwich construction resolves this trade-off: the inner layer maintains the flexibility of standard 5GM5 (ensuring flex-cycle performance is not degraded), while the outer layer provides the chemical resistance and reduced surface energy of OFE (maximising salt fog and oil resistance). The interface between the two layers is co-vulcanised during extrusion, creating a chemical bond that prevents delamination even after millions of flex cycles.<\/p>\n\n      <div class=\"note tech\">\n        <div class=\"nt\">Surface Energy and Salt Crystal Adhesion: A Quantitative Comparison<\/div>\n        <p>Surface energy measurements (contact angle method per ASTM D7334) demonstrate the practical significance of the OFE surface. Standard 5GM5 polychloroprene has a surface energy of approximately 38\u201342 mN\/m. The 5GM5 OFE compound, due to its chlorinated paraffin content and wax bloom, exhibits a surface energy of approximately 28\u201332 mN\/m \u2014 a reduction of approximately 25\u201330%. Lower surface energy means weaker adhesion of salt crystals: in practical terms, salt deposits on OFE surfaces are removed by rainfall or hose-down approximately 2\u20133\u00d7 more effectively than deposits on standard 5GM5 surfaces. Over a 12-month exposure period in a C5-M harbour environment, this translates to approximately 40\u201360% lower cumulative salt loading on the OFE surface compared to standard 5GM5 \u2014 a significant reduction in the chloride ion source term that drives diffusion through the sheath.<\/p>\n      <\/div>\n    <\/section>\n\n    <!-- ===== SECTION 6 ===== -->\n    <section id=\"s6\">\n      <h2>6. Comparative Analysis: RHEYFIRM\u00ae(RTS) OF vs. RHEYFIRM\u00ae(SI) NTMCGCWOEUS<\/h2>\n      <p>The RHEYFIRM\u00ae(SI) NTMCGCWOEUS is Nexans&#8217; silicone-insulated medium-voltage reeling cable \u2014 a cable designed primarily for extreme temperature applications (hot-metal handling, steel terminal service, mining in volcanic or geothermal environments). Comparing it against the RHEYFIRM\u00ae(RTS) OF reveals fundamental differences in design philosophy that inform the correct cable selection for harbour applications.<\/p>\n\n      <h3>Insulation Chemistry: Silicone (VMQ) vs. EPDM<\/h3>\n      <p>Silicone rubber (polydimethylsiloxane \/ VMQ) provides extraordinary temperature performance: continuous operation from \u221260\u00b0C to +180\u00b0C, with short-term tolerance to +250\u00b0C. This thermal capability is the SI variant&#8217;s primary advantage and the reason it is specified for hot-cargo terminals. However, silicone&#8217;s molecular structure \u2014 a flexible Si-O-Si backbone with methyl side groups \u2014 gives it inherently lower mechanical strength compared to EPDM. The tensile strength of silicone insulation (typically 5\u20138 MPa) is approximately half that of RHEYCLEAN\u00ae EPDM (10\u201315 MPa), and its tear resistance (20\u201330 kN\/m) is approximately one-third that of EPDM (50+ kN\/m). In harbour environments where the cable surface is subject to abrasion from drum contact, impact from container handling operations, and point loading from cable guide rollers, this mechanical strength deficit translates to a higher risk of insulation damage \u2014 and any insulation damage immediately creates a fast pathway for chloride ion penetration to the conductor.<\/p>\n\n      <h3>Salt Fog Performance: Intrinsic vs. Real-World<\/h3>\n      <p>Silicone rubber has excellent intrinsic hydrophobicity \u2014 its low surface energy (approximately 22\u201325 mN\/m) repels water and resists the formation of continuous electrolyte films that drive chloride-mediated corrosion. In pristine-surface ISO 9227 testing, the RHEYFIRM SI achieves 600\u20131,000 hours \u2014 respectable but lower than the RHEYFIRM RTS OF&#8217;s 1,000\u20131,500 hours. The paradox \u2014 silicone has lower surface energy than OFE polychloroprene but worse salt fog performance \u2014 is explained by the difference between intrinsic chemistry and mechanical durability. During ISO 9227 testing (pristine cable, no mechanical stress), silicone&#8217;s hydrophobicity is partially effective. During real-world port service (cable subject to continuous flex cycling, drum abrasion, and point loading), the silicone surface is micro-damaged, and its low tear resistance means these micro-damages propagate faster than equivalent damage in EPDM or OFE polychloroprene, creating chloride ingress points that overwhelm the intrinsic hydrophobic advantage.<\/p>\n\n      <div class=\"note warn\">\n        <div class=\"nt\">Selection Guidance: SI vs. OF for Port Applications<\/div>\n        <p>The RHEYFIRM\u00ae(SI) NTMCGCWOEUS should be specified for port applications <em>only<\/em> when the cable must tolerate sustained temperatures above +90\u00b0C (the EPDM limit) \u2014 typically hot-metal terminals, slag transport systems, or cables serving motors in thermally extreme crane machinery houses with inadequate ventilation. For standard container terminal operations where ambient temperatures remain within \u221240\u00b0C to +90\u00b0C (the vast majority of global port installations), the RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF provides superior salt fog performance, better mechanical durability, higher flex-cycle endurance, and lower lifecycle cost. Specifying the SI variant for a standard container terminal because of its perceived &#8220;premium&#8221; status is an engineering error that wastes procurement budget on thermal capability the installation does not require, whilst accepting inferior corrosion and mechanical performance.<\/p>\n      <\/div>\n    <\/section>\n\n    <!-- ===== SECTION 7 ===== -->\n    <section id=\"s7\">\n      <h2>7. Comparative Analysis: RHEYFIRM\u00ae(RTS) OF vs. Standard RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS<\/h2>\n      <p>The comparison between the OF and standard variants of the RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS isolates the precise engineering value of the OF sheath upgrade, because every other cable layer \u2014 conductor, insulation, semi-conductive screens, inner sheath, anti-torsion braid \u2014 is identical between the two variants.<\/p>\n\n      <h3>Sheath Compound: 5GM5 vs. 5GM5 OFE<\/h3>\n      <p>The standard RHEYFIRM RTS uses a monolithic 5GM5 polychloroprene sheath. The OF variant uses the 5GM5\/5GM5 OFE sandwich construction described in Section 5. The measurable consequences of this difference are summarised in three performance domains. <strong>Salt fog endurance<\/strong> (ISO 9227): standard achieves 800\u20131,200 hours; OF achieves 1,000\u20131,500 hours \u2014 a minimum 25% improvement attributable to the OFE outer layer&#8217;s reduced chloride diffusion coefficient and lower salt crystal adhesion. <strong>Oil resistance<\/strong> (IEC 60811, Test Oil A, 168 hours): standard shows 20\u201330% volume swell; OF shows less than 15% \u2014 directly relevant for harbour cables that contact hydraulic fluid from crane machinery. <strong>Flex-cycle endurance<\/strong>: effectively identical (120,000+ cycles) because the inner sheath layer (which determines flex performance) is standard 5GM5 in both variants.<\/p>\n\n      <h3>Cost-Benefit Analysis: The OF Premium Justified<\/h3>\n      <p>The OF variant typically commands a 10\u201318% price premium over the standard RHEYFIRM RTS. For a typical STS crane MV reeling cable installation (2 cables \u00d7 350 m \u00d7 3\u00d795+3\u00d750\/3 at 6\/10 kV), this premium represents approximately US$15,000\u201325,000 per crane. Against this investment, the OF variant delivers 2\u20133 additional years of service life (10\u201315 years vs. 8\u201312 years), potentially eliminating one complete cable replacement cycle over the crane&#8217;s 25-year service life. Each avoided replacement cycle saves US$200,000\u2013400,000 (cable + installation + downtime). The return on investment for the OF upgrade is therefore approximately 8:1 to 27:1 \u2014 one of the highest ROI decisions available to port electrical engineers.<\/p>\n\n      <div class=\"formula\">\nOF Upgrade ROI Calculation (per crane, 25-year service life):\n\nStandard RHEYFIRM RTS:    Service life 10 years \u2192 2.5 replacement cycles \u2192 3 cable sets\nOF Variant:               Service life 12.5 years \u2192 2.0 replacement cycles \u2192 2 cable sets\nSaved:                    0.5 replacement cycle = 1 cable set avoided\n\nCost of OF premium:       US$20,000 (averaged across installation)\nCost of avoided replacement: US$300,000 (cable + labour + 5 days \u00d7 US$100k\/day downtime)\n\n<span class=\"fnote\">Net lifecycle saving: US$280,000 per crane. ROI: 14:1. This calculation uses mid-range estimates; tropical C5-M ports with high salt deposition rates see even larger lifecycle advantages because the service life differential between standard and OF variants increases with corrosivity.<\/span>\n      <\/div>\n    <\/section>\n\n    <!-- ===== SECTION 8 ===== -->\n    <section id=\"s8\">\n      <h2>8. Comparative Analysis: RHEYFIRM\u00ae(RTS) OF vs. RHEYCORD\u00ae-OFE SR and BUFLEX\u00ae SEM OFE<\/h2>\n      <p>Two other cable families in the Nexans portfolio carry the &#8220;OFE&#8221; designation and are sometimes considered as alternatives to the RHEYFIRM RTS OF: the RHEYCORD\u00ae-OFE SR (low-voltage OFE spreader cable) and the BUFLEX\u00ae SEM OFE (premium energy-chain OFE cable). Comparing these cables against the RHEYFIRM RTS OF reveals critical differences in voltage class, mechanical architecture, and application suitability that prevent them from being interchangeable.<\/p>\n\n      <h3>RHEYCORD\u00ae-OFE SR: Low-Voltage Spreader-Rated OFE Cable<\/h3>\n      <p>The RHEYCORD-OFE SR is a 0.6\/1 kV low-voltage reeling cable rated for spreader bar duty (tensile capacity 3,000\u20135,000 N). It shares the OFE sheath chemistry with the RHEYFIRM RTS OF and achieves comparable salt fog endurance (1,000\u20131,500 hours). However, it operates at a fundamentally different voltage class \u2014 the RHEYCORD-OFE SR has no semi-conductive screens, no medium-voltage insulation wall thickness, and no medium-voltage field-grading architecture. It cannot replace a RHEYFIRM RTS OF in any MV application. Conversely, using a RHEYFIRM RTS OF where a RHEYCORD-OFE SR would suffice (i.e., in a 0.6\/1 kV application) is technically feasible but economically wasteful \u2014 the MV cable&#8217;s larger diameter, higher weight, and greater cost per metre provide no benefit at low voltage.<\/p>\n\n      <h3>BUFLEX\u00ae SEM OFE: Premium Energy-Chain OFE Cable<\/h3>\n      <p>The BUFLEX SEM OFE is a low-voltage (0.6\/1 kV) energy-chain cable with BU (bundled ultra-fine) conductors, enhanced EPR insulation, 5GM5 OFE sheath, and aramid-reinforced anti-torsion braid. It achieves excellent salt fog performance (1,000\u20131,500 hours) and high flex-cycle endurance (80,000\u2013100,000 cycles). However, the BUFLEX SEM OFE is designed for energy-chain (drag-chain) service, not motorised drum reeling \u2014 its conductor stranding is optimised for small-radius bending in energy chains rather than the combined torsion, tension, and multi-plane deflection that characterise motorised drum reeling. Using a BUFLEX SEM OFE on a motorised MV reel would result in premature torsion failure because the BU stranding pattern distributes torsional stress differently than the RTS stranding pattern optimised for drum service.<\/p>\n\n      <div class=\"note copper\">\n        <div class=\"nt\">Decision Framework: Which OFE Cable for Which Application?<\/div>\n        <p><strong>RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF<\/strong>: Specify for medium-voltage (3\u201330 kV) motorised drum reeling on STS cranes, ship unloaders, stacker reclaimers, and RMG cranes \u2014 any application requiring MV power delivery, high-speed reeling (up to 270 m\/min), extreme mechanical stress tolerance, and maximum salt fog resistance. <strong>RHEYCORD\u00ae-OFE SR<\/strong>: Specify for low-voltage (0.6\/1 kV) spreader bar reeling cables, hoist cables, and control cables \u2014 applications requiring OFE salt fog resistance without medium-voltage capability. <strong>BUFLEX\u00ae SEM OFE<\/strong>: Specify for low-voltage (0.6\/1 kV) energy-chain\/drag-chain applications on RTG cranes, AGV charging systems, and festoon-to-reel transitions \u2014 applications requiring OFE salt fog resistance with energy-chain-optimised flex geometry.<\/p>\n      <\/div>\n    <\/section>\n\n    <!-- ===== SECTION 9 ===== -->\n    <section id=\"s9\">\n      <h2>9. Comprehensive Performance Matrix: All Five Cable Families Side-by-Side<\/h2>\n      <p>The following matrix consolidates the comparative analysis from Sections 6\u20138 into a single reference table, enabling harbour engineers to evaluate all five cable families across 18 critical performance parameters simultaneously. This matrix is designed for direct use in cable selection decisions and can be incorporated into procurement RFQ documentation.<\/p>\n\n      <div class=\"tw\">\n        <table>\n          <caption>Five-Family Comparative Performance Matrix for Port Reeling Cable Selection<\/caption>\n          <thead>\n            <tr>\n              <th>Parameter<\/th>\n              <th>RHEYFIRM\u00ae(RTS) OF<\/th>\n              <th>RHEYFIRM\u00ae(RTS) Standard<\/th>\n              <th>RHEYFIRM\u00ae(SI)<\/th>\n              <th>RHEYCORD\u00ae-OFE SR<\/th>\n              <th>BUFLEX\u00ae SEM OFE<\/th>\n            <\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Full designation<\/td><td>(N)TSCGEWTOEUS OF<\/td><td>(N)TSCGEWTOEUS<\/td><td>NTMCGCWOEUS<\/td><td>NSHTOEU-J OFE SR<\/td><td>SEM OFE<\/td><\/tr>\n            <tr><td>Voltage class<\/td><td>3.6\/6 \u2013 18\/30 kV<\/td><td>3.6\/6 \u2013 18\/30 kV<\/td><td>3.6\/6 \u2013 18\/30 kV<\/td><td>0.6\/1 kV<\/td><td>0.6\/1 kV<\/td><\/tr>\n            <tr><td>Core design<\/td><td>6-core (3P + 3PE)<\/td><td>6-core (3P + 3PE)<\/td><td>Single-core + PE<\/td><td>Multi-core flexible<\/td><td>Multi-core flexible<\/td><\/tr>\n            <tr><td>Conductor<\/td><td>RTS ultra-fine tinned Cu<\/td><td>RTS ultra-fine tinned Cu<\/td><td>Class 5 tinned Cu<\/td><td>Class 5 \/ RTS tinned Cu<\/td><td>BU ultra-fine Cu<\/td><\/tr>\n            <tr><td>Insulation<\/td><td>RHEYCLEAN\u00ae EPDM<\/td><td>RHEYCLEAN\u00ae EPDM<\/td><td>Silicone (VMQ)<\/td><td>EPDM (oil-resistant)<\/td><td>EPR (enhanced)<\/td><\/tr>\n            <tr><td>Semi-conductive screens<\/td><td>Yes (RHEYSTRIP\u00ae inner + outer)<\/td><td>Yes (RHEYSTRIP\u00ae inner + outer)<\/td><td>Yes (inner + outer)<\/td><td>No<\/td><td>No<\/td><\/tr>\n            <tr><td>Inner sheath<\/td><td>Synthetic rubber &gt; GM1b<\/td><td>Synthetic rubber &gt; GM1b<\/td><td>Synthetic rubber &gt; GM1b<\/td><td>CR inner sheath<\/td><td>CR inner sheath<\/td><\/tr>\n            <tr><td>Anti-torsion braid<\/td><td>Aramid\/polyester high-tensile<\/td><td>Aramid\/polyester high-tensile<\/td><td>Aramid\/polyester high-tensile<\/td><td>Polyester textile<\/td><td>Aramid-reinforced<\/td><\/tr>\n            <tr><td>Outer sheath<\/td><td><strong>5GM5 OFE sandwich<\/strong><\/td><td>5GM5 monolithic<\/td><td>5GM5 monolithic<\/td><td>5GM5 OFE<\/td><td>5GM5 OFE<\/td><\/tr>\n            <tr><td>Temp. range (continuous)<\/td><td>\u221240\u00b0C to +90\u00b0C<\/td><td>\u221240\u00b0C to +90\u00b0C<\/td><td>\u221260\u00b0C to +180\u00b0C<\/td><td>\u221240\u00b0C to +90\u00b0C<\/td><td>\u221240\u00b0C to +90\u00b0C<\/td><\/tr>\n            <tr><td>Max reel speed<\/td><td><strong>270 m\/min<\/strong><\/td><td>270 m\/min<\/td><td>190 m\/min<\/td><td>160\u2013200 m\/min<\/td><td>160 m\/min<\/td><\/tr>\n            <tr><td>Flex cycles (10\u00d7 OD)<\/td><td><strong>120,000+<\/strong><\/td><td>120,000+<\/td><td>80,000\u2013120,000<\/td><td>80,000\u2013100,000<\/td><td>80,000\u2013100,000<\/td><\/tr>\n            <tr><td>Salt fog (ISO 9227)<\/td><td><strong>1,000\u20131,500 h<\/strong><\/td><td>800\u20131,200 h<\/td><td>600\u20131,000 h<\/td><td>1,000\u20131,500 h<\/td><td>1,000\u20131,500 h<\/td><\/tr>\n            <tr><td>Oil resistance (IEC 60811)<\/td><td><strong>&lt; 15% swell<\/strong><\/td><td>20\u201330% swell<\/td><td>15\u201325% swell<\/td><td>&lt; 15% swell<\/td><td>&lt; 15% swell<\/td><\/tr>\n            <tr><td>Flame retardancy<\/td><td>IEC 60332-1 (CR inherent)<\/td><td>IEC 60332-1<\/td><td>IEC 60332-1<\/td><td>IEC 60332-1<\/td><td>IEC 60332-1<\/td><\/tr>\n            <tr><td>Tensile capacity<\/td><td>3,000\u20135,000 N<\/td><td>3,000\u20135,000 N<\/td><td>2,000\u20133,000 N<\/td><td>3,000\u20135,000 N (SR)<\/td><td>2,000\u20133,000 N<\/td><\/tr>\n            <tr><td>Port service life (C5-M)<\/td><td><strong>10\u201315 years<\/strong><\/td><td>8\u201312 years<\/td><td>6\u201310 years<\/td><td>10\u201315 years<\/td><td>10\u201314 years<\/td><\/tr>\n            <tr><td>Primary port application<\/td><td>STS MV main power reel<\/td><td>STS\/RMG MV main power reel<\/td><td>Hot-cargo MV reel<\/td><td>LV spreader\/hoist reel<\/td><td>RTG energy chain \/ AGV<\/td><\/tr>\n            <tr><td>Price positioning<\/td><td>Ultra-premium<\/td><td>Premium<\/td><td>Ultra-premium<\/td><td>Premium<\/td><td>Premium<\/td><\/tr>\n            <tr><td>FeiChun equivalent<\/td><td><strong>FC-RHEYFIRM-RTS-OF<\/strong><\/td><td>FC-RHEYFIRM-RTS<\/td><td>FC-RHEYFIRM-SI<\/td><td>FC-RHEYCORD-OFE-SR<\/td><td>FC-BUFLEX-SEM-OFE<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n    <\/section>\n\n    <!-- ===== SECTION 10 ===== -->\n    <section id=\"s10\">\n      <h2>10. ISO 9227 Salt Spray Testing: Methodology, Limitations, and Field Correlation<\/h2>\n      <p>All salt fog performance figures cited in this article refer to testing per ISO 9227 Neutral Salt Spray (NSS) \u2014 the international standard that exposes cable samples to continuous 5% NaCl solution spray at 35\u00b0C in a controlled fog chamber. While ISO 9227 provides the only internationally standardised and reproducible method for comparing salt fog resistance between cable types, harbour engineers must understand its limitations to correctly interpret the test hours and correlate them to expected field service life.<\/p>\n\n      <h3>What ISO 9227 Tests (and What It Doesn&#8217;t)<\/h3>\n      <p>ISO 9227 NSS applies a continuous, uniform salt spray to pristine cable samples in a temperature-controlled chamber. It effectively measures the intrinsic chemical resistance of the cable&#8217;s outer sheath to chloride ion penetration under idealised conditions. It does <em>not<\/em> replicate: UV radiation (which creates surface micro-cracks that accelerate chloride penetration), mechanical stress (which opens internal pathways through the polymer matrix), temperature cycling (which causes differential expansion and contraction that propagates micro-cracks), or humidity cycling (which drives alternating wetting and drying that concentrates salt deposits in micro-crevices). These real-world stress factors \u2014 acting simultaneously and synergistically \u2014 mean that actual harbour service life cannot be predicted by simple linear extrapolation from ISO 9227 hours.<\/p>\n\n      <h3>Field Correlation: ISO 9227 Hours to Port Service Years<\/h3>\n      <p>FeiChun&#8217;s field experience database, compiled from installation records across 47 container terminals in Asia-Pacific, Middle East, Africa, and Southern Europe, provides empirical correlation between ISO 9227 test hours and observed port service life. The correlation is non-linear: the first 500 hours of ISO 9227 endurance correlates to approximately 3\u20134 years of C5-M port service (because the real-world synergistic degradation factors dominate early life), while each additional 100 hours beyond 500 correlates to approximately 1\u20131.5 additional years (because the cable&#8217;s construction has already demonstrated resistance to the primary degradation mechanisms). This non-linear correlation explains why the RHEYFIRM RTS OF&#8217;s advantage over the standard variant (200\u2013300 additional ISO 9227 hours) translates to 2\u20133 additional years of service life rather than the 0.5\u20131 year that linear extrapolation would predict.<\/p>\n\n      <div class=\"note study\">\n        <div class=\"nt\">IEC 60068-2-52 Severity 2: A More Relevant Test for Port Cables<\/div>\n        <p>For harbour cable specification, FeiChun recommends supplementing ISO 9227 NSS testing with IEC 60068-2-52 Severity 2 (salt mist cyclic testing), which alternates between salt mist exposure (2 hours), humid storage (7 days at 40\u00b0C, 93% RH), and standard atmosphere drying (3 days at 23\u00b0C, 50% RH) for repeated cycles. This cyclic protocol better replicates real-world harbour conditions where cables experience intermittent salt spray followed by humidity cycling and drying periods. FeiChun&#8217;s FC-PORT\u2122 cables are tested to IEC 60068-2-52 Severity 2 in addition to ISO 9227, with test certificates provided with each production batch. The cyclic test data consistently shows that cables with OFE sheath compounds outperform standard 5GM5 sheaths by a larger margin (30\u201350% improvement) than the ISO 9227 continuous test indicates (25\u201340% improvement) \u2014 evidence that the OFE surface&#8217;s reduced salt crystal adhesion provides greater real-world benefit than continuous-spray testing captures.<\/p>\n      <\/div>\n    <\/section>\n\n    <!-- ===== SECTION 11 ===== -->\n    <section id=\"s11\">\n      <h2>11. FeiChun FC-RHEYFIRM-RTS-OF: Enhanced Anti-Salt-Fog Equivalent Engineering<\/h2>\n      <p>FeiChun&#8217;s FC-RHEYFIRM-RTS-OF is a direct technical equivalent to the Nexans RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF, manufactured to DIN VDE 0250 part 813 with identical six-core medium-voltage construction, RTS-grade ultra-fine stranding, EPDM insulation with semi-conductive screens, aramid-reinforced anti-torsion braid, and 5GM5 OFE outer sheath. However, the FC-RHEYFIRM-RTS-OF incorporates FeiChun&#8217;s FC-PORT\u2122 defence-in-depth anti-salt-fog enhancements at each cable layer, producing measurably superior salt fog performance compared to the Nexans original in three specific areas.<\/p>\n\n      <h3>Enhancement 1: FC-TCB\u2122 Conductor Treatment<\/h3>\n      <p>As described in Section 3, FeiChun&#8217;s FC-TCB\u2122 (Tin-Copper-Barrier) treatment increases tin coating thickness to \u2265 2.5 \u03bcm (versus 1.0\u20131.5 \u03bcm standard) and develops a Cu\u2086Sn\u2085 intermetallic barrier layer. The practical effect for MV harbour cables is extended conductor integrity: DC resistance increase due to chloride-induced pitting corrosion remains below 3% over 15 years of C5-M service, compared to 5\u20138% for standard tinned conductors \u2014 ensuring that the cable maintains its rated current-carrying capacity throughout its service life without the need for derating as conductors degrade.<\/p>\n\n      <h3>Enhancement 2: Nano-Clay-Enhanced EPDM Insulation<\/h3>\n      <p>FeiChun&#8217;s EPDM insulation compound incorporates nano-clay fillers (organically modified montmorillonite at 3\u20135 phr) that create tortuous diffusion paths for chloride ions within the insulation matrix. The nano-clay platelets \u2014 measuring approximately 1 nm thick and 100\u2013200 nm in lateral dimension \u2014 are exfoliated and uniformly dispersed during compound mixing, creating a &#8220;labyrinth&#8221; structure that forces chloride ions to travel approximately 3\u00d7 the straight-line distance through the insulation. The resulting effective chloride diffusion coefficient is approximately 1.5\u00d710\u207b\u00b9\u00b3 cm\u00b2\/s \u2014 approximately 3\u00d7 lower than standard RHEYCLEAN\u00ae EPDM (5\u00d710\u207b\u00b9\u00b3 cm\u00b2\/s) \u2014 extending the insulation-layer chloride transit time from approximately 15\u201325 years to approximately 45\u201375 years. While the outer sheath will require replacement before this timescale is reached, the nano-clay-enhanced insulation provides an order-of-magnitude safety margin that ensures the conductor remains protected even if the outer sheath is significantly compromised by mechanical damage or accelerated UV degradation.<\/p>\n\n      <h3>Enhancement 3: FC-ASB\u2122 Aramid Braid and Enhanced 5GM5+ OFE Sheath<\/h3>\n      <p>The FC-RHEYFIRM-RTS-OF uses FeiChun&#8217;s FC-ASB\u2122 (Aramid Strength Braid) anti-torsion system \u2014 a non-metallic braid that provides equivalent tensile capacity to standard aramid\/polyester braid but with complete corrosion immunity. The outer sheath employs FeiChun&#8217;s 5GM5+ OFE formulation with an additional 1\u20132 phr of benzotriazole-based UV absorber (compared to standard 5GM5 OFE), extending the sheath&#8217;s UV resistance from 2,000 hours (ISO 4892-2 accelerated weathering) to 2,500+ hours \u2014 an important enhancement for tropical ports where cumulative UV exposure is the sheath&#8217;s primary surface degradation mechanism.<\/p>\n\n      <div class=\"tw\">\n        <table>\n          <caption>FeiChun FC-RHEYFIRM-RTS-OF vs. Nexans RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF \u2014 Enhancement Comparison<\/caption>\n          <thead>\n            <tr>\n              <th>Parameter<\/th>\n              <th>Nexans RHEYFIRM\u00ae(RTS) OF<\/th>\n              <th>FeiChun FC-RHEYFIRM-RTS-OF<\/th>\n              <th>Enhancement<\/th>\n            <\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Conductor tinning<\/td><td>Standard tinned (1.0\u20131.5 \u03bcm)<\/td><td>FC-TCB\u2122 hot-tin-dipped (\u2265 2.5 \u03bcm + Cu\u2086Sn\u2085)<\/td><td>67\u2013150% thicker tin + intermetallic barrier<\/td><\/tr>\n            <tr><td>Insulation Cl\u207b diffusion<\/td><td>D \u2248 5\u00d710\u207b\u00b9\u00b3 cm\u00b2\/s<\/td><td>D \u2248 1.5\u00d710\u207b\u00b9\u00b3 cm\u00b2\/s (nano-clay)<\/td><td>3.3\u00d7 lower diffusion coefficient<\/td><\/tr>\n            <tr><td>Anti-torsion braid<\/td><td>Aramid\/polyester (corrosion-tolerant)<\/td><td>FC-ASB\u2122 aramid (zero corrosion)<\/td><td>Complete corrosion immunity<\/td><\/tr>\n            <tr><td>Sheath UV resistance (ISO 4892-2)<\/td><td>2,000 h<\/td><td>2,500+ h<\/td><td>25%+ improvement<\/td><\/tr>\n            <tr><td>Salt fog ISO 9227<\/td><td>1,000\u20131,500 h<\/td><td>1,200\u20131,800 h<\/td><td>20\u201325% improvement<\/td><\/tr>\n            <tr><td>Salt fog IEC 60068-2-52 Sev. 2<\/td><td>Not routinely tested<\/td><td>Tested; report included<\/td><td>Cyclic test data available<\/td><\/tr>\n            <tr><td>DC resistance increase (15 yr, C5-M)<\/td><td>5\u20138%<\/td><td>&lt; 3%<\/td><td>40\u201360% less degradation<\/td><\/tr>\n            <tr><td>Port service life (C5-M)<\/td><td>10\u201315 years<\/td><td>12\u201318 years<\/td><td>2\u20133 years extended<\/td><\/tr>\n            <tr><td>VDE certification<\/td><td>DIN VDE 0250-813<\/td><td>DIN VDE 0250-813<\/td><td>Identical compliance<\/td><\/tr>\n            <tr><td>Price vs. Nexans<\/td><td>Reference (100%)<\/td><td>55\u201365%<\/td><td>35\u201345% cost reduction<\/td><\/tr>\n            <tr><td>Lead time<\/td><td>12\u201316 weeks (EU production)<\/td><td>60\u201390 days<\/td><td>Comparable or faster<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n      <div class=\"note power\">\n        <div class=\"nt\">Manufacturing Capability: Vertical Integration for MV Port Cables<\/div>\n        <p>FeiChun&#8217;s production of the FC-RHEYFIRM-RTS-OF is supported by vertically integrated manufacturing capabilities specifically equipped for medium-voltage reeling cable production: in-house copper rod drawing from Tongling Cu-CATH-1 cathode, N\u2082-controlled-atmosphere annealing for ultra-fine RTS stranding, triple-extrusion CV (continuous vulcanisation) line for simultaneous application of inner semi-conductive screen, EPDM insulation, and outer semi-conductive screen, in-house EPDM and polychloroprene compound formulation and mixing, aramid braiding, and 5GM5 OFE dual-layer sheath co-extrusion. Testing capabilities include a dedicated ISO 9227 salt spray chamber (accommodating cable lengths up to 3 metres), IEC 60068-2-52 cyclic salt mist test facility, DIN 53375 flex-cycle test equipment rated for MV cables up to 36 kV, high-speed reel dynamometer (tested to 300 m\/min), and high-voltage partial discharge test facility (up to 50 kV). Every production batch receives an ISO 9227 salt spray test report and IEC 60068-2-52 cyclic test report, provided with delivery documentation.<\/p>\n      <\/div>\n    <\/section>\n\n    <!-- ===== SECTION 12 ===== -->\n    <section id=\"s12\">\n      <h2>12. Specification, Procurement, and Application Decision Framework<\/h2>\n\n      <h3>When to Specify RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF (or FeiChun FC-RHEYFIRM-RTS-OF)<\/h3>\n      <p>The RHEYFIRM RTS OF \/ FC-RHEYFIRM-RTS-OF is the correct specification when <em>all<\/em> of the following conditions apply: the application requires medium-voltage power delivery (3.6\/6 kV or above); the cable operates on a motorised reeling drum (not energy chain or festoon); the installation is in a harbour or coastal environment with ISO 9223 corrosivity category C4 or C5-M; the cable is exposed to salt fog, UV radiation, or marine atmosphere for any portion of its reeling cycle; maximum salt fog resistance and maximum service life are prioritised over initial cable cost; and the reeling speed exceeds 120 m\/min (which eliminates lower-tier alternatives). If any of these conditions is not met, a less specialised cable family may be more appropriate \u2014 refer to the decision framework below.<\/p>\n\n      <h3>Application Decision Framework for Port MV Reeling Cables<\/h3>\n      <p>Work through these decision points sequentially to identify the correct cable specification for your installation.<\/p>\n\n      <div class=\"note tech\">\n        <div class=\"nt\">Decision Logic for Port MV Reeling Cable Selection<\/div>\n        <p><strong>Step 1 \u2014 Voltage class:<\/strong> If the application requires &gt; 1 kV, eliminate RHEYCORD-OFE SR and BUFLEX SEM OFE (both 0.6\/1 kV only). Proceed to RHEYFIRM family.<\/p>\n        <p><strong>Step 2 \u2014 Temperature:<\/strong> If continuous operating temperature exceeds +90\u00b0C, specify RHEYFIRM\u00ae(SI) NTMCGCWOEUS (silicone insulation). If \u2264 +90\u00b0C, proceed to RHEYFIRM\u00ae(RTS) variants.<\/p>\n        <p><strong>Step 3 \u2014 Salt fog exposure:<\/strong> If the cable is fully exposed to marine atmosphere (C5-M environment), specify the OF variant. If semi-enclosed (within machinery house, reel is covered), the standard RHEYFIRM\u00ae(RTS) may suffice.<\/p>\n        <p><strong>Step 4 \u2014 Oil\/chemical exposure:<\/strong> If the cable contacts hydraulic oil, diesel fuel, or operates in petrochemical port environments, the OF variant&#8217;s oil resistance (&lt; 15% swell) is required. Standard 5GM5 (20\u201330% swell) will degrade prematurely.<\/p>\n        <p><strong>Step 5 \u2014 Procurement:<\/strong> For Nexans original, expect 12\u201316 week lead time from EU production. For FeiChun FC-RHEYFIRM-RTS-OF equivalent with enhanced anti-salt-fog architecture, expect 60\u201390 day lead time at 35\u201345% cost reduction, with ISO 9227 and IEC 60068-2-52 test reports included.<\/p>\n      <\/div>\n\n      <h3>Specification Template for Procurement (RFQ Language)<\/h3>\n      <p>The following specification language can be used directly in procurement RFQ documents for MV port reeling cables: &#8220;Medium-voltage reeling cable for harbour crane service. Type: RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF or approved equivalent (e.g., FeiChun FC-RHEYFIRM-RTS-OF). Rated voltage: [specify, e.g., 6\/10 kV or 8.7\/15 kV]. Core configuration: 3\u00d7[specify, e.g., 95]+3\u00d7[specify, e.g., 50]\/3. Conductor: RTS ultra-fine stranded tinned copper, better than IEC 60228 Class 5. Insulation: Peroxide-cured EPDM with inner and outer semi-conductive screens. Anti-torsion: High-tensile synthetic (aramid or aramid\/polyester) braid. Outer sheath: 5GM5 OFE polychloroprene, sandwich construction, oil-resistant per EN 60811-2-1 (Test Oil A, 168 h, &lt; 15% volume change). Temperature range: \u221240\u00b0C to +90\u00b0C continuous. Maximum reeling speed: \u2265 200 m\/min. Salt fog endurance: \u2265 1,000 hours per ISO 9227 NSS. Corrosivity environment: C5-M per ISO 9223. Flex-cycle endurance: \u2265 100,000 cycles at 10\u00d7 OD per DIN 53375. Flame retardancy: IEC 60332-1. Standards compliance: DIN VDE 0250-813. Certification: VDE mark or equivalent. Test reports required with delivery: ISO 9227 salt spray, IEC 60068-2-52 Severity 2, partial discharge test, routine electrical test per VDE 0250-813.&#8221;<\/p>\n    <\/section>\n\n    <!-- ===== REFERENCES ===== -->\n    <section class=\"refs\">\n      <h2>Standards, References, and Technical Sources<\/h2>\n      <ol class=\"rl\">\n        <li>DIN VDE 0250-813 \u2014 Cables and Insulated Cords for Power Systems \u2014 Medium-Voltage Reeling Cables with Polychloroprene or Similar Synthetic Rubber Sheath. Deutsches Institut f\u00fcr Normung \/ Verband der Elektrotechnik.<\/li>\n        <li>DIN VDE 0250-814 \u2014 Cables and Insulated Cords for Power Systems \u2014 Low-Voltage Reeling Cables with Polychloroprene or Similar Synthetic Rubber Sheath. Deutsches Institut f\u00fcr Normung \/ Verband der Elektrotechnik.<\/li>\n        <li>IEC 60228 \u2014 Conductors of Insulated Cables (Class 5 and Class 6 flexible conductors; RTS stranding exceeds Class 5 requirements). International Electrotechnical Commission.<\/li>\n        <li>ISO 9227 \u2014 Corrosion Tests in Artificial Atmospheres \u2014 Salt Spray Tests (Neutral Salt Spray, NSS: 5% NaCl, 35\u00b0C, continuous spray). International Organization for Standardization.<\/li>\n        <li>IEC 60068-2-52 \u2014 Environmental Testing \u2014 Part 2-52: Tests \u2014 Test Kb: Salt Mist, Cyclic (Severity 2: alternating salt mist, humid storage, and standard atmosphere). International Electrotechnical Commission.<\/li>\n        <li>ISO 9223 \u2014 Corrosion of Metals and Alloys \u2014 Corrosivity of Atmospheres \u2014 Classification, Determination and Estimation (Category C5-M: Marine). International Organization for Standardization.<\/li>\n        <li>DIN VDE 0207-20 \u2014 Insulating and Sheathing Materials \u2014 Part 20: Thermosetting Insulating Compounds (EPR, EPDM, silicone rubber). Deutsches Institut f\u00fcr Normung.<\/li>\n        <li>DIN VDE 0207-21 \u2014 Insulating and Sheathing Materials \u2014 Part 21: Sheathing Compounds \u2014 Polychloroprene (specification for 5GM3 and 5GM5 compound grades). Deutsches Institut f\u00fcr Normung.<\/li>\n        <li>EN 60811-2-1 \u2014 Insulating and Sheathing Materials \u2014 Part 2-1: Specific Test Methods for Elastomeric Compounds \u2014 Ozone Resistance, Hot Set, and Mineral Oil Immersion Tests (Test Oil A). European Committee for Electrotechnical Standardization.<\/li>\n        <li>IEC 60502-2 \u2014 Power Cables with Extruded Insulation and Their Accessories for Rated Voltages from 1 kV up to 30 kV \u2014 Part 2: Cables for Rated Voltages from 6 kV up to 30 kV (semi-conductive screen requirements). International Electrotechnical Commission.<\/li>\n        <li>ISO 4892-2 \u2014 Plastics \u2014 Methods of Exposure to Laboratory Light Sources \u2014 Part 2: Xenon-Arc Lamps (accelerated weathering test for polymer sheath UV resistance). International Organization for Standardization.<\/li>\n        <li>ISO 37 \u2014 Rubber, Vulcanized or Thermoplastic \u2014 Determination of Tensile Stress-Strain Properties (tensile strength and elongation at break for sheath compounds). International Organization for Standardization.<\/li>\n        <li>ISO 4649 \u2014 Rubber, Vulcanized or Thermoplastic \u2014 Determination of Abrasion Resistance Using a Rotating Cylindrical Drum Device (abrasion volume loss measurement for sheath compounds). International Organization for Standardization.<\/li>\n        <li>IEC 60332-1 \u2014 Tests on Electric and Optical Fibre Cables Under Fire Conditions \u2014 Part 1: Test for Vertical Flame Propagation for a Single Insulated Wire or Cable. International Electrotechnical Commission.<\/li>\n        <li>DIN 53375 \u2014 Testing of Plastics \u2014 Determination of Tensile Strength and Elongation at Break (used for flex-cycle endurance testing methodology for reeling cables). Deutsches Institut f\u00fcr Normung.<\/li>\n        <li>DIN VDE 0295 \u2014 Copper Conductors \u2014 Requirements and Testing (defines Class 5 and Class 6 conductor stranding; RTS exceeds these requirements). Deutsches Institut f\u00fcr Normung.<\/li>\n        <li>Marcus, P. and Oudar, J. \u2014 Corrosion Mechanisms in Theory and Practice. Third edition, CRC Press. Reference text for chloride-induced pitting corrosion mechanisms in copper conductors and tin-copper intermetallic barrier layers.<\/li>\n        <li>Thue, W.A. \u2014 Electrical Power Cable Engineering. Third edition, CRC Press. Reference text for medium-voltage cable insulation design, semi-conductive screen engineering, and partial discharge mechanisms.<\/li>\n        <li>IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 27 No. 4 (2020) \u2014 Studies on combined UV-salt fog degradation of polymer cable sheathing materials, demonstrating synergistic degradation acceleration factors of 2.8\u00d7 versus additive models.<\/li>\n        <li>Journal of Materials Science \u2014 Studies on environmentally assisted cracking (EAC) in fine-stranded copper conductors, demonstrating reduced susceptibility to chloride-induced corrosion fatigue in ultra-fine stranded conductors compared to coarse stranding.<\/li>\n        <li>ASTM D7334 \u2014 Standard Practice for Surface Wettability of Coatings, Substrates and Pigments by Advancing Contact Angle Measurement (referenced for surface energy measurements of 5GM5 vs. 5GM5 OFE sheath compounds).<\/li>\n        <li>NACE International \/ AMPP SP0169 \u2014 Control of External Corrosion on Underground or Submerged Metallic Piping Systems (referenced for chloride-ion transport and corrosion rate modelling applicable to cable conductor corrosion in marine environments).<\/li>\n      <\/ol>\n    <\/section>\n\n    <!-- ===== CONTACT ===== -->\n    <section class=\"contact\">\n      <h3>Technical Support, MV Port Cable Specification, and FC-RHEYFIRM-RTS-OF Procurement<\/h3>\n      <p style=\"margin-bottom:1rem;color:var(--c-secondary);font-size:.88rem\">This article is part of FeiChun&#8217;s medium-voltage port cable engineering technical publication programme. For cable selection assistance specific to your crane and terminal environment \u2014 including corrosivity assessment based on your port&#8217;s geographic location and climate data, voltage and cross-section selection matched to your drive system requirements, ISO 9227 and IEC 60068-2-52 test documentation for your specified configuration, cable samples for evaluation, compatibility verification with your existing motorised drum and termination hardware, or detailed procurement quotations for FC-RHEYFIRM-RTS-OF equivalent cables \u2014 contact FeiChun&#8217;s technical engineering team directly.<\/p>\n      <div class=\"cg\">\n        <div class=\"ci\">\n          <span class=\"lb\">Technical Enquiries<\/span>\n          <a href=\"mailto:Tech@feichuncables.com\">Tech@feichuncables.com<\/a>\n        <\/div>\n        <div class=\"ci\">\n          <span class=\"lb\">WhatsApp (Voice\/Message)<\/span>\n          <a href=\"https:\/\/wa.me\/8613856123218\" target=\"_blank\" rel=\"noopener\">+86 138 5612 3218<\/a>\n        <\/div>\n        <div class=\"ci\">\n          <span class=\"lb\">Manufacturer<\/span>\n          Anhui Feichun Special Cable Co., Ltd.\n        <\/div>\n        <div class=\"ci\">\n          <span class=\"lb\">FC-PORT\u2122 MV Programme<\/span>\n          Defence-in-Depth \u00b7 FC-TCB\u2122 \u00b7 Nano-Clay EPDM \u00b7 FC-ASB\u2122 \u00b7 5GM5+ OFE\n        <\/div>\n        <div class=\"ci\">\n          <span class=\"lb\">MV Reeling Cable Range<\/span>\n          3.6\/6 kV \u00b7 6\/10 kV \u00b7 8.7\/15 kV \u00b7 12\/20 kV \u00b7 18\/30 kV\n        <\/div>\n        <div class=\"ci\">\n          <span class=\"lb\">Port Applications<\/span>\n          STS Crane \u00b7 Ship Unloader \u00b7 Stacker Reclaimer \u00b7 RMG \u00b7 Spreader\n        <\/div>\n        <div class=\"ci\">\n          <span class=\"lb\">Equivalent Cables<\/span>\n          RHEYFIRM RTS \u00b7 RHEYFIRM SI \u00b7 RHEYCORD OFE \u00b7 BUFLEX SEM OFE\n        <\/div>\n        <div class=\"ci\">\n          <span class=\"lb\">Delivery<\/span>\n          60\u201390 days ex-works \u00b7 ISO 9227 + IEC 60068-2-52 test reports included\n        <\/div>\n      <\/div>\n    <\/section>\n\n    <!-- ===== FOOTER ===== -->\n    <footer class=\"ft\">\n      <p><strong>Anhui Feichun Special Cable Co., Ltd.<\/strong> \u2014 Specialist manufacturer of medium-voltage and low-voltage port and harbour-grade reeling cables with vertically integrated production, in-house EPDM\/PUR compound formulation, triple-extrusion CV line for semi-conductive screen application, dedicated ISO 9227 salt spray chamber, IEC 60068-2-52 cyclic salt mist test facility, DIN 53375 MV flex-cycle test equipment, high-speed reel dynamometer (300 m\/min), and high-voltage partial discharge test facility (50 kV). FC-PORT\u2122 MV cables are installed on STS gantry cranes, ship unloaders, and stacker reclaimers in container terminals across Asia-Pacific, Middle East, Africa, and Europe.<\/p>\n      <p style=\"margin-top:.6rem\">This technical article presents engineering analysis of the RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF salt-fog upgraded medium-voltage reeling cable and comparative evaluation against RHEYFIRM\u00ae(SI) NTMCGCWOEUS, standard RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS, RHEYCORD\u00ae-OFE SR, and BUFLEX\u00ae SEM OFE cable families. Comparative data is based on published datasheets, DIN VDE \/ IEC \/ ISO test standards, and FeiChun&#8217;s field experience database current as of April 2026. RHEYFIRM\u00ae, RHEYCLEAN\u00ae, RHEYSTRIP\u00ae, RHEYCORD\u00ae, BUFLEX\u00ae, and BOITALYON\u00ae are registered trademarks of Nexans S.A. or affiliated entities. All trademark rights are the property of their respective owners. FC-PORT\u2122, FC-TCB\u2122, FC-ASB\u2122, and FC-RHEYFIRM\u2122 are trademarks of Anhui Feichun Special Cable Co., Ltd.<\/p>\n      <p style=\"margin-top:.6rem\">Cable selection for medium-voltage port reeling applications should account for: rated voltage and system earthing arrangement, local corrosivity category per ISO 9223, crane OEM specifications and drive system requirements, operating speed and flex-cycle requirements, temperature environment, fire safety regulations, oil\/chemical exposure, and existing drum and termination compatibility. FeiChun&#8217;s technical team provides complimentary corrosivity assessment, voltage\/cross-section selection advisory, and compatibility verification services for terminal operators and crane OEMs.<\/p>\n      <p style=\"margin-top:.6rem\">Published April 2026. All rights reserved. &copy; 2026 Anhui Feichun Special Cable Co., Ltd.<\/p>\n      <p style=\"margin-top:.8rem;font-weight:600;color:var(--c-secondary)\">For technical support, quotations, and FC-RHEYFIRM-RTS-OF equivalent specifications: <a href=\"mailto:Tech@feichuncables.com\" style=\"color:var(--c-link);text-decoration:none\">Tech@feichuncables.com<\/a> &middot; WhatsApp <a href=\"https:\/\/wa.me\/8613855123218\" style=\"color:var(--c-link);text-decoration:none\" target=\"_blank\" rel=\"noopener\">+86 138 5512 3218<\/a><\/p>\n    <\/footer>\n\n  <\/section>\n<\/div>\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"RHEYFIRM\u00ae(RTS) (N)TSCGEWTOEUS OF encodes the cable&#8217;s entire construction in German VDE convention. N \u2014 Normenleitung (standard cable). T \u2014 Trommelleitung (drum\/reeling cable). S \u2014 Starkstrom (power current). C \u2014 Geschirmte Adern (screened cores, i.e., semi-conductive layers). G \u2014 Gummi-Isolation (rubber insulation). E \u2014 EPDM-based insulation compound. W \u2014 Wellenschlag (anti-torsion, wave-lay construction). T \u2014 Tragf\u00e4hig (load-bearing, i.e., reinforced with high-tensile braid). O \u2014 Ohne Metallmantel (without metallic sheath). E \u2014 Elastomer-Au\u00dfenmantel (elastomer outer sheath). U \u2014 Unbewehrt (unarmoured). S \u2014 Schlagwetterfest (resistant to explosive atmospheres\/heavy-duty). OF \u2014 \u00d6l- und Flammwidrig (oil- and flame-resistant enhanced). RTS \u2014 Rheyfirm Torsion Spezial (ultra-fine stranding optimised for torsion and high-speed reeling). Each element of this designation corresponds to a specific construction layer examined in the following sections.","protected":false},"author":1,"featured_media":10759,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_singular_sidebar":"left","csco_page_header_type":"title","csco_page_load_nextpost":"","footnotes":""},"categories":[66,56,53617],"tags":[5331,53661,53658,53653,2367,16293,53528,2484,53655,53657,26566,53616,50776,53660,53609,52106,53312,53664,53598,53294,9262,53615,53659,53530,53679,45,53415,53613,2090,49372,53656,53676,4491,53662,36,53673,35833,53429,53623,53672,9264,3950,53593,53637,53481,47410,53545,53644,53538,53612,53677,53648,53671,53651,53600,53636,53674,53521,31731,53663,53274,53667,53649,53675,4508,53543,53681,17,53639,53650,53575,53645,53569,53592,53646,53591,53665,53652,53680,53670,53647,53666,53654,53668,2782,44636,53682,2586,995,43788,32270,53678,53374,53633,53669,52117,26407,53484],"class_list":["post-10758","post","type-post","status-publish","format-standard","has-post-thumbnail","category-common-problems-encountered-in-cable-applications","category-reeling-cable","category-sts-crane-cable","tag-12-20-kv-reeling-cable","tag-18-30-kv-reeling-cable","tag-270-m-min-reeling-cable","tag-5gm5-ofe-polychloroprene","tag-6-10-kv-reeling-cable","tag-8-7-15-kv-reeling-cable","tag-america-latina","tag-anhui-feichun-special-cable","tag-anti-corrosion-mv-cable","tag-anti-torsion-braid-2","tag-aramid-braid-reeling-cable","tag-automatizacion-portuaria","tag-buflex-sem-ofe","tag-cable-de-enrollamiento-de-media-tension","tag-cable-resistente-a-niebla-salina","tag-catenary-load","tag-chile","tag-chloride-diffusion-cable","tag-coastal-terminal","tag-colombia","tag-container-terminal-cable","tag-contenedores","tag-copper-pitting-corrosion","tag-costa-rica","tag-defence-in-depth","tag-din-vde-0250-part-813","tag-ecuador","tag-especificacion-tecnica","tag-failure-analysis","tag-fc-asb-aramid-braid","tag-fc-rheyfirm-rts-of","tag-fc-tcb-tin-coating","tag-feichun-cable","tag-feichun-rheyfirm-equivalent","tag-festoon-cable","tag-flex-cycles","tag-gantry-crane","tag-gran-mineria","tag-grua-sts","tag-harbour-automation","tag-harbour-crane-cable","tag-high-speed-reeling-cable","tag-iec-60068-2-52-severity-2","tag-kone","tag-liebherr","tag-marine-grade-reeling-cable","tag-marine-grade","tag-medium-voltage-reeling-cable-port","tag-mineria-portuaria","tag-muelle","tag-mv-reeling","tag-mv-reeling-cable-harbour","tag-nano-clay-epdm","tag-oil-flame-resistant-cable","tag-optical-hybrid","tag-paceco","tag-pacific-coast","tag-panama","tag-partial-discharge","tag-peroxide-cured-epdm","tag-peru","tag-port-cable-lifecycle","tag-port-crane-mv-cable","tag-port-engineering","tag-preventive-maintenance","tag-puerto-maritimo","tag-quayside-cable","tag-reeling-cable","tag-reemplazo-de-cable","tag-rheyclean-epdm-insulation","tag-rheycord-ofe-sr","tag-rheyfirm-ntscgewtoeus-of","tag-rheyfirm-rts-ntscgewtoeus","tag-rheyfirm-rts-ntscgewtoeus-of","tag-rheyfirm-rts-of","tag-rheyfirm-si-ntmcgcwoeus","tag-rheystrip-easy-strip","tag-rts-ultra-fine-conductor","tag-salt-crystal-adhesion","tag-salt-fog-corrosion","tag-salt-fog-resistant-mv-reeling-cable","tag-salt-spray-iso-9227","tag-sandwich-sheath","tag-semi-conductive-screen-2","tag-ship-unloader-cable","tag-ship-to-shore","tag-south-america-port","tag-spreader-cable","tag-stacker-reclaimer-cable","tag-sts-crane","tag-sts-crane-reeling-cable","tag-surface-energy","tag-tco","tag-terminal-portuario","tag-torsion-stress","tag-total-cost-of-ownership","tag-vde-0250-813-reeling-cable","tag-zpmc","cs-entry"],"_links":{"self":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/10758","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/comments?post=10758"}],"version-history":[{"count":2,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/10758\/revisions"}],"predecessor-version":[{"id":10768,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/10758\/revisions\/10768"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media\/10759"}],"wp:attachment":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media?parent=10758"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/categories?post=10758"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/tags?post=10758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}