N2XSH 12\/20 kV B2ca Cable | Feichun Engineering Guide for 1×70\/25 mm\u00b2<\/title>\n<meta name=\"description\" content=\"Professional English engineering guide to N2XSH 12\/20 kV B2ca single-core XLPE medium-voltage cable, including the 1x70\/25 mm\u00b2 copper RM reference construction, complete source matrix, fire performance, current ratings, installation and verification.\">\n<meta name=\"keywords\" content=\"N2XSH 12\/20 kV, N2XSH B2ca, N2XSH 1x70\/25 mm2, 12\/20 kV XLPE cable, B2ca-s1,d0,a1, LSZH medium voltage cable, IEC 60840, IEC 60332-3 Category C, Feichun Cable\">\n<style>\n:root{--bg:#041018;--p:#0b202b;--p2:#123443;--ink:#f4f9fb;--muted:#adc4ce;--line:#315b6f;--c:#55dff7;--g:#62df9c;--s:#e8c37b;--r:#ff777f;--v:#aa9bff;--source:#caedff}\n*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px Arial,Helvetica,sans-serif;line-height:1.68}.wrap{max-width:1840px;margin:auto;padding:0 28px}a{color:var(--c);text-decoration:none}a:hover{text-decoration:underline}.hero{padding:70px 0;background:radial-gradient(circle at 8% 5%,rgba(85,223,247,.22),transparent 34%),radial-gradient(circle at 92% 8%,rgba(255,119,127,.15),transparent 34%),linear-gradient(135deg,#041018,#0b4056)}h1{font-size:48px;line-height:1.12;max-width:1450px}h2{margin-top:55px;border-left:7px solid var(--c);padding-left:15px;line-height:1.25}h3{color:var(--c)}.lead{font-size:21px;max-width:1450px}.badges,.meta{display:flex;gap:10px;flex-wrap:wrap}.badges span,.meta span{background:#071821;border:1px solid var(--line);border-radius:22px;padding:8px 14px;font-weight:bold}.cards,.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(245px,1fr));gap:15px;margin:22px 0}.card,.box,.note,.warn{background:var(--p);border:1px solid var(--line);border-radius:10px;padding:18px}.card{border-top:5px solid var(--c)}.value{font-size:30px;color:var(--c);font-weight:bold}.note{border-left:7px solid var(--c)}.warn{border-left:7px solid var(--r);margin:13px 0}.good{border-left:7px solid var(--g)}.toc{background:var(--p);border:1px solid var(--line);padding:20px;border-left:7px solid var(--c)}.toc ol{columns:2}.scroll{overflow:auto}table{width:100%;border-collapse:collapse;background:#071821;min-width:1200px}th,td{border:1px solid var(--line);padding:8px 9px;vertical-align:top}th{background:var(--p2);color:#f4f9fb}td.key{color:var(--c);font-weight:bold}td.source{color:var(--source)}td.derived{background:#1d4b67;color:#caedff;font-weight:bold}code{color:#f0d59e;background:#071821;padding:2px 5px;border-radius:4px}.formula{white-space:pre-line;background:#071821;border:1px solid var(--line);padding:18px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.svg{border:1px solid var(--line);padding:10px;background:#071821;margin:22px 0}.svg svg{width:100%;height:auto;display:block}.small{font-size:12px;color:#91a9b4}.contact{display:grid;grid-template-columns:1fr 1fr;gap:12px}.contact div{background:#071821;border:1px solid var(--line);padding:15px}footer{margin-top:50px;background:#02080c;padding:34px 0}@media(max-width:800px){h1{font-size:31px}.toc ol{columns:1}.contact{grid-template-columns:1fr}}\n<\/style>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"TechArticle\",\"headline\":\"N2XSH 12\/20 kV B2ca Cable Engineering Guide\",\"description\":\"Engineering guide to the N2XSH 1x70\/25 mm\u00b2 reference construction, fire performance and MV installation controls.\",\"author\":{\"@type\":\"Organization\",\"name\":\"Feichun Cable\"},\"publisher\":{\"@type\":\"Organization\",\"name\":\"Feichun Cable\"}}<\/script>\n<\/head>\n<body>\n<section class=\"hero\"><div class=\"wrap\"><div class=\"badges\"><span>FEICHUN CABLE<\/span><span>N2XSH 12\/20 kV<\/span><span>B2ca-s1,d0,a1<\/span><span>1\u00d770\/25 mm\u00b2<\/span><span>Cu \/ XLPE \/ LSZH<\/span><span>IEC 60332-3 CAT. C<\/span><\/div><h1>Feichun N2XSH 12\/20 kV \u2014 B2ca Fire-Performance Medium-Voltage Cable<\/h1><p class=\"lead\">A full-English engineering guide for the N2XSH 1\u00d770\/25 mm\u00b2 (1×70\/25 mm2) single-core medium-voltage cable reference: stranded class 2 copper conductor, XLPE insulation, semi-conducting screens, concentric copper wire and copper tape screen, LSZH red sheath, UV resistance, rodent protection and B2ca-s1,d0,a1 declared fire performance.<\/p><div class=\"meta\"><span>12\/20 kV (24 kV Um)<\/span><span>70 mm\u00b2 conductor<\/span><span>25 mm\u00b2 screen<\/span><span>90 \u00b0C service conductor<\/span><span>250 \u00b0C short-circuit conductor<\/span><span>12 \u00d7 D laying factor<\/span><span>31.7 mm source OD<\/span><span>2010 kg\/km source mass<\/span><\/div><\/div><\/section>\n<main class=\"wrap\">\n<div class=\"cards\"><div class=\"card\"><div>Rated voltage U\u2080\/U (U\u2098)<\/div><div class=\"value\">12\/20 kV<\/div><div>24 kV maximum system voltage in the source notation.<\/div><\/div><div class=\"card\"><div>Fire performance<\/div><div class=\"value\">B2ca<\/div><div>s1,d0,a1 declared reaction-to-fire performance.<\/div><\/div><div class=\"card\"><div>Conductor \/ screen<\/div><div class=\"value\">70 \/ 25 mm\u00b2<\/div><div>Single copper core and concentric metallic screen section.<\/div><\/div><div class=\"card\"><div>Laying radius<\/div><div class=\"value\">12 \u00d7 D<\/div><div>380.4 mm derived from the 31.7 mm source outside diameter.<\/div><\/div><\/div>\n<div class=\"toc\"><h3>Contents<\/h3><ol><li>Engineering position<\/li><li>Designation and application<\/li><li>Standard-basis review<\/li><li>Complete source specification matrix<\/li><li>Layer-by-layer cross-section<\/li><li>Electrical and thermal design<\/li><li>Fire performance and LSZH<\/li><li>Industrial installation scenes<\/li><li>Handling and termination<\/li><li>Selection comparison<\/li><li>Installation acceptance<\/li><li>Failure mode analysis<\/li><li>Feichun certification scope<\/li><li>Source and data audit<\/li><\/ol><\/div>\n\n<h2>1. Engineering position: a fire-performance MV cable for fixed energy networks<\/h2>\n<div class=\"note\"><b>N2XSH 12\/20 kV is a single-core, XLPE-insulated, copper-conductor medium-voltage cable with a concentric metallic screen and LSZH outer sheath.<\/b> The supplied 1\u00d770\/25 mm\u00b2 reference is intended for fixed energy-network service in residential or industrial areas, underground routes and cable ducts, including networks exposed to sudden load changes where low dielectric losses are valuable.<\/div>\n<div class=\"grid\"><div class=\"box\"><b>Electrical platform<\/b><br>The 70 mm\u00b2 class 2 RM copper conductor provides the current path; the 12\/20 kV insulation system and semi-conducting screens control the electric field around the single core.<\/div><div class=\"box\"><b>Fire-performance platform<\/b><br>B2ca-s1,d0,a1, LSZH construction, IEC 60332-3 Cat. C, IEC 61034-2 and IEC 60754-1\/-2 address different fire, smoke and halogen-related performance questions.<\/div><div class=\"box\"><b>Mechanical and environmental platform<\/b><br>The source lists UV resistance and rodent protection. The 12 \u00d7 D laying factor and class 2 stranded conductor improve installation handling, but do not create continuous-flex or reel duty.<\/div><div class=\"box\"><b>System platform<\/b><br>Single-core formation, screen bonding, cleats, terminations, induced-current control, current rating and short-circuit duty must be designed as one MV cable system.<\/div><\/div>\n<div class=\"warn\"><b>Data boundary:<\/b> the article preserves the supplied Nexans reference values and uses them as an engineering benchmark for Feichun product development. They are not silently presented as a current Feichun manufacturing drawing, Feichun catalogue code or Feichun certificate. Exact Feichun product data, test reports and project approvals must be issued separately.<\/div>\n\n<h2>2. N2XSH designation and application logic<\/h2>\n<div class=\"scroll\"><table><thead><tr><th>Designation element<\/th><th>Engineering meaning<\/th><th>Design consequence<\/th><th>Source status<\/th><\/tr><\/thead><tbody><tr><td class=\"key\">N<\/td><td>European \/ national designation family<\/td><td>Always read the complete construction and governing standard; the first letter alone is not a sufficient purchase specification.<\/td><td class=\"source\">Designation context<\/td><\/tr><tr><td class=\"key\">2X<\/td><td>XLPE insulation<\/td><td>Provides the dielectric system for the stated medium-voltage class and 90 \u00b0C continuous conductor limit.<\/td><td class=\"source\">Reference construction<\/td><\/tr><tr><td class=\"key\">S<\/td><td>Copper metallic screen<\/td><td>Provides a defined screen \/ earth-fault path and electric-field control when correctly bonded and terminated.<\/td><td class=\"source\">Reference construction<\/td><\/tr><tr><td class=\"key\">H<\/td><td>Halogen-free \/ LSZH sheath family<\/td><td>Supports low-smoke and halogen-free fire strategy; exact CPR performance remains product-specific.<\/td><td class=\"source\">Reference construction<\/td><\/tr><tr><td class=\"key\">1\u00d770\/25 mm\u00b2<\/td><td>One 70 mm\u00b2 conductor with a 25 mm\u00b2 metallic-screen section<\/td><td>Conductor and screen must both be included in accessory selection, fault-current study and termination design.<\/td><td class=\"source\">Nexans reference item<\/td><\/tr><tr><td class=\"key\">B2ca-s1,d0,a1<\/td><td>Declared CPR reaction-to-fire performance<\/td><td>Relevant to the project fire strategy, but not a substitute for route design, fire stopping or local building requirements.<\/td><td class=\"source\">Nexans DoP \/ product page<\/td><\/tr><\/tbody><\/table><\/div>\n<div class=\"grid\"><div class=\"box\"><b>Suitable service logic<\/b><br>Fixed distribution feeders, transformer connections, industrial plants, switchgear, process facilities, residential or industrial areas, underground routes and ducts when the accessory and installation design are compatible.<\/div><div class=\"box\"><b>Do not overextend the designation<\/b><br>N2XSH is not automatically a mining trailing cable, crane reeling cable, festoon cable, drag-chain cable or continuous-torsion cable. A 12 \u00d7 D laying factor is an installation minimum, not a dynamic-cycle rating.<\/div><div class=\"box\"><b>Low dielectric loss and load changes<\/b><br>The source application statement links the cable to energy networks with sudden load changes. Final thermal and voltage-drop calculations must still use the actual load profile, formation, ambient and route length.<\/div><div class=\"box\"><b>Screen function<\/b><br>The copper wire plus copper tape screen is not merely an EMC decoration. Its section, continuity, bonding and fault duty must be closed at both ends according to the system earthing design.<\/div><\/div>\n\n<h2>3. Standard-basis review: preserve the source listing and verify the voltage-class basis<\/h2>\n<div class=\"warn\"><b>Important engineering observation:<\/b> the supplied Nexans product page lists \u201cTest: IEC 60840\u201d for this 12\/20 kV entry. The official IEC 60840:2020 publication describes its scope as extruded-insulation power cables above 30 kV (U<sub>m<\/sub> = 36 kV) up to 150 kV (U<sub>m<\/sub> = 170 kV). Because 12\/20 kV is below that stated scope, the product-specific data sheet, DoP, test certificate and contract must clarify the exact normative and test basis. This article preserves the source\u2019s IEC 60840 listing and does not silently replace or delete it.<\/div>\n<div class=\"grid\"><div class=\"box\"><b>What the source establishes<\/b><br>The product page identifies the item as N2XSH 1\u00d770\/25 mm\u00b2, gives the construction, 12\/20 kV rating, fire and environmental characteristics, and lists IEC 60840 as the test reference.<\/div><div class=\"box\"><b>What the engineer must request<\/b><br>Current product data sheet; routine and type-test report; partial-discharge and withstand-test basis; conductor and screen resistance; applicable national \/ customer standard; accessory compatibility; current DoP revision.<\/div><div class=\"box\"><b>Why the distinction matters<\/b><br>A correct cable selection is not achieved by copying a standard number into a purchase order. Voltage class, test method, accessory system and approval document must be internally consistent.<\/div><div class=\"box\"><b>Feichun release discipline<\/b><br>For an equivalent Feichun configuration, the product code, exact standard basis, declared fire performance and test report must be stated in the released technical file rather than inferred from a similar designation.<\/div><\/div>\n<div class=\"formula\">Standard and design control\nSource listing: IEC 60840 \u2192 preserve as a reference-field value\nOfficial IEC scope check: IEC 60840:2020 covers above 30 kV (Um = 36 kV) to 150 kV (Um = 170 kV)\nActual 12\/20 kV release: verify the applicable standard, test report, DoP, accessories and customer specification\n\nDo not convert a web-page \u201cTest\u201d field into a universal conformity claim without checking the current controlled documents.<\/div>\n\n<h2>4. Complete N2XSH 1\u00d770\/25 mm\u00b2 reference specification matrix<\/h2>\n<div class=\"warn\"><b>Data provenance:<\/b> the following matrix preserves the user-provided values and the corresponding Nexans product-page \/ DoP values. \u201cNot declared in source\u201d fields remain visibly blank rather than being filled from another N2XSH size or supplier.<\/div>\n<div class=\"scroll\"><table><thead><tr><th>Specification field<\/th><th>Reference value<\/th><th>Engineering interpretation<\/th><th>Data status<\/th><\/tr><\/thead><tbody><tr><td class=\"key\">Product designation<\/td><td class=\"source\">N2XSH 12\/20 kV – B2ca<\/td><td>Single-core XLPE-insulated medium-voltage cable with a copper conductor and special fire performance.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Specific construction<\/td><td class=\"source\">N2XSH 1×70\/25 mm\u00b2<\/td><td>1 core; 70 mm\u00b2 copper conductor; 25 mm\u00b2 metallic screen section.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Nexans reference<\/td><td class=\"source\">10590300<\/td><td>Unique product reference in the supplied source.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Country reference<\/td><td class=\"source\">TR<\/td><td>Turkey country reference shown in the source page.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">EAN 13<\/td><td class=\"source\">8680969250924<\/td><td>Retail \/ logistics identifier shown in the source page.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Source record<\/td><td class=\"source\">Generated 8\/4\/26 \u2014 www.nexans.com.tr \u2014 Page 1 \/ 2<\/td><td>Preserved exactly as supplied by the user; confirm the current revision before purchase.<\/td><td class=\"source\">Supplied source metadata<\/td><\/tr><tr><td class=\"key\">Test listed by source<\/td><td class=\"derived\">IEC 60840<\/td><td>The source product page lists IEC 60840; the standard-scope check is addressed in Section 3.<\/td><td class=\"derived\">Source listing \u2014 verify contract basis<\/td><\/tr><tr><td class=\"key\">Conductor material<\/td><td class=\"source\">Copper<\/td><td>Low-resistance current path for MV distribution and network fault duty.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Conductor shape<\/td><td class=\"source\">Circular stranded (RM)<\/td><td>Round stranded geometry; the source identifies class 2 flexibility.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Conductor flexibility<\/td><td class=\"source\">Stranded class 2<\/td><td>Improves handling and laying behaviour compared with a solid conductor of the same nominal cross-section.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Number of cores<\/td><td class=\"source\">1<\/td><td>Single-core cable; system formation, screen bonding and magnetic arrangement are installation decisions.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Conductor cross-section<\/td><td class=\"source\">70 mm\u00b2<\/td><td>Phase conductor nominal cross-section.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Concentric screen section<\/td><td class=\"source\">25 mm\u00b2<\/td><td>Copper wire plus copper tape screen section as listed for the reference construction.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Rated voltage U\u2080\/U (U\u2098)<\/td><td class=\"source\">12\/20 kV (24 kV)<\/td><td>Medium-voltage distribution class; use the complete insulation coordination and accessory rating.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Operating temperature range<\/td><td class=\"source\">\u221220 … 90 \u00b0C<\/td><td>Source usage range; installation, ambient and accessory limits still govern the system.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Maximum conductor temperature in service<\/td><td class=\"source\">90 \u00b0C<\/td><td>Continuous conductor operating limit stated by the source.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Short-circuit maximum conductor temperature<\/td><td class=\"source\">250 \u00b0C<\/td><td>Source value; final I\u00b2t verification must include the exact clearing time and cable system.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Nominal outside diameter<\/td><td class=\"source\">31.7 mm<\/td><td>Use for tray spacing, gland selection, bending-radius calculation and drum handling.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Approximate weight<\/td><td class=\"source\">2010 kg\/km<\/td><td>Approximately 2.010 kg\/m; handling equipment and drum logistics must use the actual delivery record.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Maximum conductor DC resistance at 20 \u00b0C<\/td><td class=\"source\">0.268 \u03a9\/km<\/td><td>Use for voltage-drop and loss calculations with the applicable AC impedance model.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Permissible current, buried 20 \u00b0C, trefoil<\/td><td class=\"source\">239 A<\/td><td>Source formation and ambient condition; not a universal ampacity value.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Permissible current, buried 20 \u00b0C, flat<\/td><td class=\"derived\">\u2014 A<\/td><td>The source displays a dash; no value is invented.<\/td><td class=\"derived\">Not declared in source<\/td><\/tr><tr><td class=\"key\">Permissible current, in air 30 \u00b0C, flat<\/td><td class=\"source\">356 A<\/td><td>Source formation and ambient condition; support, spacing and solar exposure must be checked.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Permissible current, in air 30 \u00b0C, trefoil<\/td><td class=\"derived\">\u2014 A<\/td><td>The source displays a dash; no value is invented.<\/td><td class=\"derived\">Not declared in source<\/td><\/tr><tr><td class=\"key\">Permissible short-circuit current, conductor, 1 s<\/td><td class=\"source\">10 kA<\/td><td>Source value for conductor short-circuit duty; verify the actual protection clearing time.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Permissible short-circuit current, screen, 1 s<\/td><td class=\"derived\">\u2014 kA<\/td><td>The source displays a dash; screen fault duty must be verified from the released design.<\/td><td class=\"derived\">Not declared in source<\/td><\/tr><tr><td class=\"key\">Bending factor when laying<\/td><td class=\"derived\">12 \u00d7 D<\/td><td>With the published 31.7 mm outside diameter, the derived minimum laying radius is 380.4 mm.<\/td><td class=\"derived\">Source + derived<\/td><\/tr><tr><td class=\"key\">Rodent protection<\/td><td class=\"source\">Yes<\/td><td>Environmental protection claim shown in the source characteristics.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">UV resistance<\/td><td class=\"source\">Yes<\/td><td>Environmental protection claim shown in the source characteristics.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Flame retardant<\/td><td class=\"source\">IEC 60332-3 Cat. C<\/td><td>Bunched-cable vertical flame-spread test category; not the same designation as the CPR reaction-to-fire class.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Fire performance class<\/td><td class=\"source\">B2ca-s1,d0,a1<\/td><td>Declared performance in the supplied product \/ DoP record.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Smoke density<\/td><td class=\"source\">IEC 61034-2<\/td><td>Smoke-performance test reference shown on the product page.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Halogen-free<\/td><td class=\"source\">IEC 60754-1; IEC 60754-2<\/td><td>LSZH \/ halogen-acid-gas related references shown on the product page.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Outer sheath<\/td><td class=\"source\">LSZH<\/td><td>Low-smoke, zero-halogen sheath; source page identifies the sheath colour as red.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Sheath colour<\/td><td class=\"source\">Red<\/td><td>Source characteristic; colour is not a substitute for cable marking or phase identification practice.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Declaration of Performance<\/td><td class=\"source\">No. 1001329-TRDE<\/td><td>DoP record associated with the supplied product reference.<\/td><td class=\"source\">Nexans DoP reference<\/td><\/tr><tr><td class=\"key\">DoP certification date<\/td><td class=\"source\">5\/27\/25<\/td><td>Date printed in the source DoP.<\/td><td class=\"source\">Nexans DoP reference<\/td><\/tr><tr><td class=\"key\">AVCP<\/td><td class=\"source\">System 1+<\/td><td>Assessment and Verification of Constancy of Performance shown in the source DoP.<\/td><td class=\"source\">Nexans DoP reference<\/td><\/tr><tr><td class=\"key\">Notified body<\/td><td class=\"source\">1008<\/td><td>Notified body number shown in the source DoP.<\/td><td class=\"source\">Nexans DoP reference<\/td><\/tr><tr><td class=\"key\">Harmonized fire standard<\/td><td class=\"source\">EN 50575:2014+A1:2016<\/td><td>The DoP states the B2ca-s1,d0,a1 reaction-to-fire performance according to this standard.<\/td><td class=\"source\">Nexans DoP reference<\/td><\/tr><tr><td class=\"key\">Packaging<\/td><td class=\"source\">Drum (1000 m)<\/td><td>Source family page lists 1000 m drum packaging for this construction.<\/td><td class=\"source\">Nexans product reference<\/td><\/tr><tr><td class=\"key\">Delivery reel size for 1000 m<\/td><td class=\"derived\">\u2014 cm<\/td><td>The detailed page displays a dash; confirm drum dimensions and mass from the delivery document.<\/td><td class=\"derived\">Not declared in source<\/td><\/tr><\/tbody><\/table><\/div>\n<p class=\"small\">The source page displays \u201c\u2014 A\u201d for buried flat formation, \u201c\u2014 A\u201d for trefoil formation in air, \u201c\u2014 kA\u201d for screen short-circuit current and \u201c\u2014 cm\u201d for the 1000 m delivery reel size. These dashes are retained exactly as missing source values.<\/p>\n\n<h2>5. N2XSH 12\/20 kV cross-section \u2014 layer-by-layer construction<\/h2>\n<div class=\"svg\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1900 1300\" role=\"img\" aria-label=\"N2XSH 12\/20 kV single-core cable cross-section with copper conductor, XLPE insulation, screens and LSZH sheath\">\n<defs>\n<radialGradient id=\"xsh-jacket\" cx=\"30%\" cy=\"24%\"><stop stop-color=\"#8d313b\"\/><stop offset=\".68\" stop-color=\"#4b151f\"\/><stop offset=\"1\" stop-color=\"#17070b\"\/><\/radialGradient>\n<radialGradient id=\"xsh-xlpe\" cx=\"31%\" cy=\"24%\"><stop stop-color=\"#f8ebc9\"\/><stop offset=\".72\" stop-color=\"#d5bd8a\"\/><stop offset=\"1\" stop-color=\"#92764c\"\/><\/radialGradient>\n<radialGradient id=\"xsh-cu\" cx=\"30%\" cy=\"24%\"><stop stop-color=\"#f1b26e\"\/><stop offset=\".65\" stop-color=\"#bf682b\"\/><stop offset=\"1\" stop-color=\"#703313\"\/><\/radialGradient>\n<pattern id=\"xsh-strands\" width=\"18\" height=\"18\" patternUnits=\"userSpaceOnUse\"><circle cx=\"4\" cy=\"4\" r=\"3.4\" fill=\"#f4c383\"\/><circle cx=\"13\" cy=\"4\" r=\"3.4\" fill=\"#b75c26\"\/><circle cx=\"8.5\" cy=\"13\" r=\"3.4\" fill=\"#d67a33\"\/><\/pattern>\n<pattern id=\"xsh-screen\" width=\"20\" height=\"20\" patternUnits=\"userSpaceOnUse\"><path d=\"M0 3 L20 17 M-5 3 L15 17 M5 -3 L25 11\" stroke=\"#d9b34c\" stroke-width=\"4\"\/><path d=\"M0 17 L20 3 M-5 17 L15 3 M5 23 L25 9\" stroke=\"#976d20\" stroke-width=\"3\"\/><\/pattern>\n<marker id=\"xsh-arrow\" markerWidth=\"12\" markerHeight=\"12\" refX=\"10\" refY=\"4\" orient=\"auto\"><path d=\"M0 0 L12 4 L0 8 Z\" fill=\"#dcebf0\"\/><\/marker>\n<\/defs>\n<rect width=\"1900\" height=\"1300\" fill=\"#06131b\"\/>\n<text x=\"62\" y=\"67\" fill=\"#55dff7\" font-family=\"Arial\" font-size=\"36\" font-weight=\"700\">N2XSH 1\u00d770\/25 mm\u00b2 \u2014 physically credible layer sequence<\/text>\n<text x=\"62\" y=\"107\" fill=\"#adc4ce\" font-family=\"Arial\" font-size=\"18\">Single copper core \u00b7 class 2 stranded RM conductor \u00b7 12\/20 kV \u00b7 XLPE insulation \u00b7 copper wire + tape screen \u00b7 LSZH sheath.<\/text>\n<text x=\"62\" y=\"138\" fill=\"#ffaaa5\" font-family=\"Arial\" font-size=\"16\">The drawing is an engineering reconstruction for explanation. It is not a manufacturing drawing; exact thicknesses and lay dimensions must be released by Feichun.<\/text>\n<g transform=\"translate(625 730)\">\n <circle r=\"480\" fill=\"url(#xsh-jacket)\" stroke=\"#b65963\" stroke-width=\"14\"\/>\n <circle r=\"415\" fill=\"url(#xsh-screen)\" stroke=\"#efcc65\" stroke-width=\"12\"\/>\n <circle r=\"375\" fill=\"#c9a44a\" stroke=\"#fff0b8\" stroke-width=\"9\" stroke-dasharray=\"10 10\"\/>\n <circle r=\"354\" fill=\"#263941\" stroke=\"#7c9aa3\" stroke-width=\"7\"\/>\n <circle r=\"328\" fill=\"#5a7d86\" stroke=\"#a3c9cf\" stroke-width=\"7\" stroke-dasharray=\"7 10\"\/>\n <circle r=\"302\" fill=\"url(#xsh-xlpe)\" stroke=\"#ffe8a5\" stroke-width=\"10\"\/>\n <circle r=\"164\" fill=\"#233941\" stroke=\"#8baab2\" stroke-width=\"7\" stroke-dasharray=\"8 10\"\/>\n <circle r=\"146\" fill=\"#e6d597\" stroke=\"#fff0b8\" stroke-width=\"8\"\/>\n <circle r=\"95\" fill=\"url(#xsh-cu)\" stroke=\"#f5c083\" stroke-width=\"8\"\/>\n <circle r=\"74\" fill=\"url(#xsh-strands)\" stroke=\"#ffe0a8\" stroke-width=\"5\"\/>\n <path d=\"M-60 0 C-42 -50 42 -50 60 0 C42 50 -42 50 -60 0 Z\" fill=\"none\" stroke=\"#8a4a1d\" stroke-width=\"5\" opacity=\".7\"\/>\n<\/g>\n<g font-family=\"Arial\" fill=\"#eaf6fa\">\n <line x1=\"930\" y1=\"330\" x2=\"1390\" y2=\"180\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#xsh-arrow)\"\/><text x=\"1410\" y=\"176\" font-size=\"24\" font-weight=\"700\" fill=\"#ff9c9f\">1. Red LSZH outer sheath<\/text><text x=\"1410\" y=\"209\" font-size=\"18\">Low-smoke, zero-halogen outer protection; UV and rodent protection are listed.<\/text>\n <line x1=\"880\" y1=\"450\" x2=\"1390\" y2=\"330\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#xsh-arrow)\"\/><text x=\"1410\" y=\"325\" font-size=\"24\" font-weight=\"700\" fill=\"#e8c37b\">2. Copper wire + copper tape screen<\/text><text x=\"1410\" y=\"358\" font-size=\"18\">Concentric metallic screen; 25 mm\u00b2 screen section in the reference item.<\/text>\n <line x1=\"850\" y1=\"560\" x2=\"1390\" y2=\"480\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#xsh-arrow)\"\/><text x=\"1410\" y=\"475\" font-size=\"24\" font-weight=\"700\" fill=\"#55dff7\">3. Semi-conducting tape<\/text><text x=\"1410\" y=\"508\" font-size=\"18\">Crape tape as listed in the source construction.<\/text>\n <line x1=\"800\" y1=\"640\" x2=\"1390\" y2=\"625\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#xsh-arrow)\"\/><text x=\"1410\" y=\"620\" font-size=\"24\" font-weight=\"700\" fill=\"#9ce9f3\">4. Insulation screen<\/text><text x=\"1410\" y=\"653\" font-size=\"18\">Semi-conducting compound; maintains radial electric-field control.<\/text>\n <line x1=\"405\" y1=\"600\" x2=\"75\" y2=\"360\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#xsh-arrow)\"\/><text x=\"62\" y=\"290\" font-size=\"24\" font-weight=\"700\" fill=\"#f3df9c\">5. XLPE insulation<\/text><text x=\"62\" y=\"323\" font-size=\"18\">Cross-linked polyethylene dielectric insulation for the 12\/20 kV class.<\/text>\n <line x1=\"390\" y1=\"730\" x2=\"75\" y2=\"680\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#xsh-arrow)\"\/><text x=\"62\" y=\"625\" font-size=\"24\" font-weight=\"700\" fill=\"#8ec7d0\">6. Conductor screen<\/text><text x=\"62\" y=\"658\" font-size=\"18\">Semi-conducting compound around the stranded conductor.<\/text>\n <line x1=\"420\" y1=\"830\" x2=\"75\" y2=\"1000\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#xsh-arrow)\"\/><text x=\"62\" y=\"945\" font-size=\"24\" font-weight=\"700\" fill=\"#e8a568\">7. 70 mm\u00b2 copper conductor<\/text><text x=\"62\" y=\"978\" font-size=\"18\">Circular stranded RM, class 2 flexibility; 0.268 \u03a9\/km max DCR at 20 \u00b0C in the source.<\/text>\n <text x=\"1070\" y=\"1085\" font-size=\"22\" font-weight=\"700\" fill=\"#ffaaa5\">Not to scale \u00b7 exact screen coverage, layer thickness and compound designation require the released drawing.<\/text>\n<\/g><\/svg><\/div>\n<p>The physical construction follows the source sequence: copper conductor; semi-conducting conductor screen; XLPE insulation; semi-conducting insulation screen; crape tape; concentric copper wire plus copper tape metallic screen; LSZH outer sheath. The cross-section is drawn as a concentric single-core cable because the product is not a three-core assembly.<\/p>\n<div class=\"grid\"><div class=\"box\"><b>Conductor: copper, class 2 RM<\/b><br>The 70 mm\u00b2 conductor is circular stranded. Stranding improves laying and termination handling, while the final pulling and bending limits remain those of the complete cable.<\/div><div class=\"box\"><b>Semiconducting screens<\/b><br>The conductor and insulation screens support a controlled radial electric field and reduce local field concentration. Screen stripping and interface preparation are critical at MV terminations.<\/div><div class=\"box\"><b>XLPE insulation<\/b><br>XLPE provides the principal dielectric layer. The 90 \u00b0C continuous conductor temperature and 250 \u00b0C source short-circuit temperature must be coordinated with joints and terminations.<\/div><div class=\"box\"><b>Metallic screen<\/b><br>Copper wires plus copper tape form the 25 mm\u00b2 reference screen. The screen\u2019s continuity and earth-fault duty must be demonstrated, not assumed from the word \u201cscreen\u201d.<\/div><\/div>\n\n<h2>6. Electrical and thermal engineering<\/h2>\n<div class=\"grid\"><div class=\"box\"><b>Current rating is formation-specific<\/b><br>The source declares 239 A for buried trefoil at 20 \u00b0C and 356 A for flat formation in air at 30 \u00b0C. These cannot be copied into a different formation, ambient, soil, grouping, spacing, depth, solar or enclosure condition.<\/div><div class=\"box\"><b>Blank current fields stay blank<\/b><br>The source does not declare buried flat or in-air trefoil values for this item. The missing values must be calculated or obtained from the current manufacturer documentation.<\/div><div class=\"box\"><b>Conductor resistance<\/b><br>The source maximum DC resistance is 0.268 \u03a9\/km at 20 \u00b0C. Voltage drop and losses require conductor temperature correction, AC impedance, formation, power factor, route length and load profile.<\/div><div class=\"box\"><b>Short-circuit coordination<\/b><br>The source lists 10 kA permissible conductor short-circuit current for 1 s but no screen value. Verify the actual I\u00b2t, protection clearing time, screen bonding and accessory fault path.<\/div><\/div>\n<div class=\"formula\">Derived engineering checks for the reference item\nMinimum laying radius = 12 \u00d7 D = 12 \u00d7 31.7 mm = 380.4 mm\nApproximate mass per 100 m = 2010 kg\/km \u00d7 0.1 = 201 kg\/100 m\nApproximate mass per metre = 2010 kg\/km \u00f7 1000 = 2.010 kg\/m\nDC voltage-drop screening relation: \u0394U \u2248 I \u00d7 R \u00d7 L\nThermal check: conductor temperature, screen losses, formation, ambient, soil, grouping and accessory temperature must be solved together\nShort-circuit check: verify I\u00b2t, conductor 250 \u00b0C limit, screen duty and protective-device clearing time\n\nThe derived radius and mass are arithmetic checks from published values. They do not replace the released Feichun drawing, drum record or project calculation.<\/div>\n<div class=\"scroll\"><table><thead><tr><th>Derived check<\/th><th>Calculation<\/th><th>Result<\/th><th>Status<\/th><\/tr><\/thead><tbody><tr><td class=\"key\">Minimum laying radius<\/td><td>12 \u00d7 31.7 mm<\/td><td>380.4 mm<\/td><td class=\"derived\">Derived from source OD and 12\u00d7D<\/td><\/tr><tr><td class=\"key\">Approximate mass per 100 m<\/td><td>2010 kg\/km \u00d7 0.1<\/td><td>201 kg\/100 m<\/td><td class=\"derived\">Derived<\/td><\/tr><tr><td class=\"key\">Approximate mass per metre<\/td><td>2010 kg\/km \u00f7 1000<\/td><td>2.010 kg\/m<\/td><td class=\"derived\">Derived<\/td><\/tr><tr><td class=\"key\">Screen-to-conductor area ratio<\/td><td>25 \u00f7 70 \u00d7 100%<\/td><td>35.7%<\/td><td class=\"derived\">Derived comparison only<\/td><\/tr><\/tbody><\/table><\/div>\n\n<h2>7. Fire performance: B2ca-s1,d0,a1 is not the same as IEC 60332-3 Cat. C<\/h2>\n<p>The supplied reference combines a high fire-performance declaration with an LSZH sheath. The DoP identifies <b>B2ca-s1,d0,a1<\/b> as the declared reaction-to-fire performance under EN 50575:2014+A1:2016. The product page separately lists <b>IEC 60332-3 Cat. C<\/b>, <b>IEC 61034-2<\/b> for smoke density and <b>IEC 60754-1\/-2<\/b> for halogen-free \/ halogen-acid-gas related performance.<\/p>\n<div class=\"svg\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1900 980\" role=\"img\" aria-label=\"B2ca-s1,d0,a1 fire performance engineering diagram for LSZH medium-voltage cable in a building and industrial route\">\n<defs><marker id=\"fire-arrow\" markerWidth=\"12\" markerHeight=\"12\" refX=\"10\" refY=\"4\" orient=\"auto\"><path d=\"M0 0 L12 4 L0 8 Z\" fill=\"#dcebf0\"\/><\/marker><linearGradient id=\"fire-wall\" x1=\"0\" x2=\"1\"><stop stop-color=\"#243d45\"\/><stop offset=\"1\" stop-color=\"#12232b\"\/><\/linearGradient><\/defs>\n<rect width=\"1900\" height=\"980\" fill=\"#06131b\"\/><text x=\"60\" y=\"65\" fill=\"#55dff7\" font-family=\"Arial\" font-size=\"36\" font-weight=\"700\">Fire-performance chain \u2014 B2ca-s1,d0,a1 plus LSZH construction<\/text><text x=\"60\" y=\"105\" fill=\"#adc4ce\" font-family=\"Arial\" font-size=\"18\">CPR reaction-to-fire classification, flame-spread test, smoke, acidity and sheath material are related but not interchangeable claims.<\/text>\n<g font-family=\"Arial\" fill=\"#eaf6fa\">\n <rect x=\"70\" y=\"230\" width=\"390\" height=\"470\" rx=\"15\" fill=\"url(#fire-wall)\" stroke=\"#ff777f\" stroke-width=\"4\"\/><path d=\"M150 620 V320 H380 V620\" fill=\"#0b202b\" stroke=\"#a8c3c9\" stroke-width=\"8\"\/><path d=\"M190 620 V385 H340 V620\" fill=\"#06131b\" stroke=\"#c9dfe2\" stroke-width=\"5\"\/><path d=\"M230 620 V450 H300 V620\" fill=\"#081b24\" stroke=\"#c9dfe2\" stroke-width=\"5\"\/><text x=\"125\" y=\"760\" font-size=\"24\" font-weight=\"700\" fill=\"#ffaaa5\">Building \/ tunnel \/ plant route<\/text><text x=\"125\" y=\"794\" font-size=\"17\">fixed single-core MV distribution<\/text>\n <path d=\"M465 465 H610\" stroke=\"#dcebf0\" stroke-width=\"5\" marker-end=\"url(#fire-arrow)\"\/>\n <rect x=\"610\" y=\"230\" width=\"330\" height=\"470\" rx=\"15\" fill=\"#0b202b\" stroke=\"#e8c37b\" stroke-width=\"4\"\/><circle cx=\"775\" cy=\"400\" r=\"135\" fill=\"#4b151f\" stroke=\"#b65963\" stroke-width=\"10\"\/><path d=\"M700 465 C710 390 755 445 775 345 C797 425 845 392 850 465 C850 515 700 515 700 465Z\" fill=\"#ff777f\"\/><path d=\"M745 470 C755 435 770 452 780 400 C795 442 810 430 815 470 C815 495 745 495 745 470Z\" fill=\"#ffdc74\"\/><text x=\"705\" y=\"600\" font-size=\"26\" font-weight=\"700\" fill=\"#e8c37b\">B2ca<\/text><text x=\"665\" y=\"635\" font-size=\"18\">s1 \u00b7 d0 \u00b7 a1<\/text><text x=\"650\" y=\"668\" font-size=\"16\">declared performance<\/text>\n <path d=\"M945 465 H1080\" stroke=\"#dcebf0\" stroke-width=\"5\" marker-end=\"url(#fire-arrow)\"\/>\n <rect x=\"1080\" y=\"230\" width=\"320\" height=\"470\" rx=\"15\" fill=\"#0b202b\" stroke=\"#62df9c\" stroke-width=\"4\"\/><rect x=\"1155\" y=\"330\" width=\"170\" height=\"175\" rx=\"25\" fill=\"#8b343d\" stroke=\"#ffb5ba\" stroke-width=\"8\"\/><path d=\"M1180 395 H1300 M1180 430 H1300\" stroke=\"#ffd3d5\" stroke-width=\"5\"\/><text x=\"1115\" y=\"575\" font-size=\"24\" font-weight=\"700\" fill=\"#62df9c\">LSZH outer sheath<\/text><text x=\"1135\" y=\"611\" font-size=\"17\">IEC 60754-1 \/ -2<\/text><text x=\"1135\" y=\"643\" font-size=\"17\">IEC 61034-2 smoke reference<\/text>\n <path d=\"M1405 465 H1540\" stroke=\"#dcebf0\" stroke-width=\"5\" marker-end=\"url(#fire-arrow)\"\/>\n <rect x=\"1540\" y=\"230\" width=\"290\" height=\"470\" rx=\"15\" fill=\"#0b202b\" stroke=\"#aa9bff\" stroke-width=\"4\"\/><text x=\"1590\" y=\"320\" font-size=\"24\" font-weight=\"700\" fill=\"#aa9bff\">Installation review<\/text><text x=\"1590\" y=\"375\" font-size=\"18\">cable grouping<\/text><text x=\"1590\" y=\"415\" font-size=\"18\">vertical \/ horizontal route<\/text><text x=\"1590\" y=\"455\" font-size=\"18\">fire barriers<\/text><text x=\"1590\" y=\"495\" font-size=\"18\">support and spacing<\/text><text x=\"1590\" y=\"535\" font-size=\"18\">DoP \/ marking<\/text><text x=\"1590\" y=\"575\" font-size=\"18\">local building rules<\/text>\n <rect x=\"70\" y=\"850\" width=\"1740\" height=\"72\" rx=\"10\" fill=\"#081b24\" stroke=\"#315b6f\" stroke-width=\"2\"\/><text x=\"100\" y=\"895\" font-size=\"18\" fill=\"#ffaaa5\">IEC 60332-3 Cat. C is a bunched-cable vertical flame-spread test category; B2ca-s1,d0,a1 is a CPR declared reaction-to-fire performance. Do not substitute one label for the other.<\/text>\n<\/g><\/svg><\/div>\n<div class=\"grid\"><div class=\"box\"><b>B2ca<\/b><br>CPR reaction-to-fire classification. It belongs in the building and infrastructure fire-performance documentation and must be supported by the applicable DoP.<\/div><div class=\"box\"><b>s1<\/b><br>Smoke-production class in the declared CPR performance. The source separately lists IEC 61034-2 as a smoke-density reference.<\/div><div class=\"box\"><b>d0<\/b><br>Flaming-droplet \/ particle performance class in the declared CPR notation. It must not be generalized to another cable construction.<\/div><div class=\"box\"><b>a1<\/b><br>Acidity \/ conductivity class in the declared CPR notation. The project fire strategy should use the current DoP and local requirements.<\/div><div class=\"box\"><b>IEC 60332-3 Cat. C<\/b><br>The IEC method evaluates vertical flame spread of bunched cables under defined test conditions. IEC describes Category C using a nominal 1.5 l\/m non-metallic material volume and 20-minute flame application.<\/div><div class=\"box\"><b>LSZH<\/b><br>Low-smoke, zero-halogen sheath supports smoke and corrosive-gas control, but LSZH alone does not automatically mean B2ca or any particular CPR class.<\/div><\/div>\n<div class=\"warn\"><b>Procurement rule:<\/b> request the exact CPR DoP and fire-test documentation for the ordered Feichun construction. Do not place \u201cB2ca\u201d on a product page only because another N2XSH reference size has that classification.<\/div>\n\n<h2>8. Industrial application architecture<\/h2>\n<div class=\"svg\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1900 1000\" role=\"img\" aria-label=\"N2XSH 12\/20 kV fixed installation applications in industrial power networks, ducts and underground routes\">\n<defs><linearGradient id=\"app-sky\" x1=\"0\" x2=\"0\" y1=\"0\" y2=\"1\"><stop stop-color=\"#0b3347\"\/><stop offset=\"1\" stop-color=\"#06131b\"\/><\/linearGradient><linearGradient id=\"app-ground\" x1=\"0\" x2=\"0\" y1=\"0\" y2=\"1\"><stop stop-color=\"#304e55\"\/><stop offset=\"1\" stop-color=\"#0a1b24\"\/><\/linearGradient><marker id=\"app-arrow\" markerWidth=\"12\" markerHeight=\"12\" refX=\"10\" refY=\"4\" orient=\"auto\"><path d=\"M0 0 L12 4 L0 8 Z\" fill=\"#dcebf0\"\/><\/marker><\/defs>\n<rect width=\"1900\" height=\"1000\" fill=\"url(#app-sky)\"\/><rect y=\"650\" width=\"1900\" height=\"350\" fill=\"url(#app-ground)\"\/><path d=\"M0 650 H1900\" stroke=\"#7f9ea4\" stroke-width=\"4\"\/>\n<text x=\"60\" y=\"66\" fill=\"#55dff7\" font-family=\"Arial\" font-size=\"36\" font-weight=\"700\">N2XSH fixed-installation architecture \u2014 substation to industrial load<\/text><text x=\"60\" y=\"106\" fill=\"#adc4ce\" font-family=\"Arial\" font-size=\"18\">Low dielectric loss MV cable for energy networks, residential \/ industrial areas, underground routes and cable ducts.<\/text>\n<g font-family=\"Arial\" fill=\"#eaf6fa\">\n <rect x=\"70\" y=\"220\" width=\"270\" height=\"260\" rx=\"15\" fill=\"#0b202b\" stroke=\"#55dff7\" stroke-width=\"4\"\/><path d=\"M125 395 V295 H285 V395\" fill=\"none\" stroke=\"#a7bcc2\" stroke-width=\"13\"\/><path d=\"M145 395 H265\" stroke=\"#a7bcc2\" stroke-width=\"13\"\/><circle cx=\"205\" cy=\"285\" r=\"35\" fill=\"#e8c37b\"\/><text x=\"118\" y=\"435\" font-size=\"24\" font-weight=\"700\" fill=\"#55dff7\">Grid \/ substation<\/text><text x=\"118\" y=\"467\" font-size=\"17\">12\/20 kV feeder<\/text>\n <rect x=\"480\" y=\"220\" width=\"270\" height=\"260\" rx=\"15\" fill=\"#0b202b\" stroke=\"#62df9c\" stroke-width=\"4\"\/><rect x=\"535\" y=\"285\" width=\"160\" height=\"115\" fill=\"#263941\" stroke=\"#a6c2c7\" stroke-width=\"6\"\/><circle cx=\"570\" cy=\"320\" r=\"10\" fill=\"#62df9c\"\/><circle cx=\"605\" cy=\"320\" r=\"10\" fill=\"#ff777f\"\/><circle cx=\"640\" cy=\"320\" r=\"10\" fill=\"#55dff7\"\/><path d=\"M560 370 H670\" stroke=\"#e8c37b\" stroke-width=\"8\"\/><text x=\"523\" y=\"435\" font-size=\"24\" font-weight=\"700\" fill=\"#62df9c\">MV switchgear<\/text><text x=\"523\" y=\"467\" font-size=\"17\">screen bonding \/ terminations<\/text>\n <rect x=\"890\" y=\"220\" width=\"270\" height=\"260\" rx=\"15\" fill=\"#0b202b\" stroke=\"#e8c37b\" stroke-width=\"4\"\/><path d=\"M950 405 V330 H1095 V405\" fill=\"none\" stroke=\"#e8c37b\" stroke-width=\"10\"\/><path d=\"M965 350 H1080\" stroke=\"#55dff7\" stroke-width=\"8\"\/><path d=\"M965 380 H1080\" stroke=\"#62df9c\" stroke-width=\"8\"\/><text x=\"925\" y=\"435\" font-size=\"24\" font-weight=\"700\" fill=\"#e8c37b\">Cable duct \/ trench<\/text><text x=\"925\" y=\"467\" font-size=\"17\">12D laying radius<\/text>\n <rect x=\"1300\" y=\"220\" width=\"270\" height=\"260\" rx=\"15\" fill=\"#0b202b\" stroke=\"#aa9bff\" stroke-width=\"4\"\/><path d=\"M1340 400 V300 H1530 V400\" fill=\"none\" stroke=\"#a6c2c7\" stroke-width=\"11\"\/><path d=\"M1380 400 V345 M1435 400 V345 M1490 400 V345\" stroke=\"#55dff7\" stroke-width=\"8\"\/><text x=\"1340\" y=\"435\" font-size=\"24\" font-weight=\"700\" fill=\"#aa9bff\">Industrial process<\/text><text x=\"1340\" y=\"467\" font-size=\"17\">motor \/ transformer load<\/text>\n <path d=\"M340 350 H470 M750 350 H880 M1160 350 H1290\" stroke=\"#dcebf0\" stroke-width=\"5\" marker-end=\"url(#app-arrow)\"\/>\n <path d=\"M205 480 V755 H1440 V480\" fill=\"none\" stroke=\"#b23c48\" stroke-width=\"28\"\/><path d=\"M205 480 V755 H1440 V480\" fill=\"none\" stroke=\"#ffadb3\" stroke-width=\"4\"\/>\n <text x=\"210\" y=\"835\" fill=\"#ffaaa5\" font-size=\"24\" font-weight=\"700\">N2XSH route: fixed, supported and protected<\/text><text x=\"210\" y=\"872\" fill=\"#dcebf0\" font-size=\"18\">Use the source current ratings only for their stated formation and ambient condition; calculate the actual installation.<\/text>\n <rect x=\"80\" y=\"900\" width=\"1700\" height=\"68\" rx=\"10\" fill=\"#081b24\" stroke=\"#315b6f\" stroke-width=\"2\"\/><text x=\"110\" y=\"943\" font-size=\"18\" fill=\"#ffaaa5\">Single-core system control: phase formation, screen bonding, induced currents, cleat forces, route separation and termination geometry are part of the design.<\/text>\n<\/g><\/svg><\/div>\n<div class=\"grid\"><div class=\"box\"><b>Substation and switchgear<\/b><br>Use the single-core cable with matched terminations, screen bonding, phase formation and mechanical cleats. Confirm clearances, induced current and accessory heat.<\/div><div class=\"box\"><b>Underground and ducts<\/b><br>The source lists underground and duct applications. Verify water ingress, drainage, pulling method, sidewall pressure, duct fill, thermal soil parameters and route maintenance.<\/div><div class=\"box\"><b>Industrial plant<\/b><br>UV resistance, rodent protection and LSZH fire performance support demanding plant routes, but chemical compatibility, oil exposure and mechanical impact still require project review.<\/div><div class=\"box\"><b>Sudden load-change networks<\/b><br>Low dielectric loss is useful in energy networks with changing load profiles. Cable sizing still requires maximum demand, starting \/ transient current, voltage drop and protection coordination.<\/div><\/div>\n\n<h2>9. Handling, bending and termination<\/h2>\n<div class=\"svg\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1900 1050\" role=\"img\" aria-label=\"N2XSH single-core installation handling diagram showing drum pay-off, 12D bending radius, cleats and screen bonding\">\n<defs><marker id=\"inst-arrow\" markerWidth=\"12\" markerHeight=\"12\" refX=\"10\" refY=\"4\" orient=\"auto\"><path d=\"M0 0 L12 4 L0 8 Z\" fill=\"#dcebf0\"\/><\/marker><linearGradient id=\"inst-floor\" x1=\"0\" x2=\"0\" y1=\"0\" y2=\"1\"><stop stop-color=\"#294850\"\/><stop offset=\"1\" stop-color=\"#071820\"\/><\/linearGradient><\/defs>\n<rect width=\"1900\" height=\"1050\" fill=\"#06131b\"\/><rect y=\"670\" width=\"1900\" height=\"380\" fill=\"url(#inst-floor)\"\/><path d=\"M0 670 H1900\" stroke=\"#6a888f\" stroke-width=\"4\"\/>\n<text x=\"60\" y=\"65\" fill=\"#55dff7\" font-family=\"Arial\" font-size=\"36\" font-weight=\"700\">N2XSH installation controls \u2014 drum, bend radius, support and screen bonding<\/text><text x=\"60\" y=\"105\" fill=\"#adc4ce\" font-family=\"Arial\" font-size=\"18\">The published laying factor is 12 \u00d7 D. With D = 31.7 mm, the derived minimum radius is 380.4 mm for this reference item.<\/text>\n<g font-family=\"Arial\" fill=\"#eaf6fa\">\n <rect x=\"80\" y=\"270\" width=\"240\" height=\"235\" rx=\"15\" fill=\"#0b202b\" stroke=\"#55dff7\" stroke-width=\"4\"\/><circle cx=\"200\" cy=\"365\" r=\"70\" fill=\"#4b151f\" stroke=\"#b65963\" stroke-width=\"12\"\/><circle cx=\"200\" cy=\"365\" r=\"30\" fill=\"#263941\" stroke=\"#e8c37b\" stroke-width=\"8\"\/><path d=\"M200 295 V435 M130 365 H270\" stroke=\"#a9c1c5\" stroke-width=\"7\"\/><text x=\"125\" y=\"468\" font-size=\"23\" font-weight=\"700\">Drum pay-off<\/text><text x=\"115\" y=\"498\" font-size=\"16\">axis aligned \u00b7 end sealed<\/text>\n <path d=\"M320 365 C440 365 460 555 595 555\" fill=\"none\" stroke=\"#18080c\" stroke-width=\"56\"\/><path d=\"M320 365 C440 365 460 555 595 555\" fill=\"none\" stroke=\"#a3444e\" stroke-width=\"38\"\/><path d=\"M320 365 C440 365 460 555 595 555\" fill=\"none\" stroke=\"#ffb0b4\" stroke-width=\"4\"\/>\n <path d=\"M360 210 H655\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#inst-arrow)\"\/><text x=\"85\" y=\"185\" font-size=\"22\" font-weight=\"700\" fill=\"#e8c37b\">Controlled pulling direction<\/text><text x=\"85\" y=\"217\" font-size=\"17\">Use an approved pulling method; do not pull on the sheath alone.<\/text>\n <rect x=\"595\" y=\"505\" width=\"380\" height=\"95\" rx=\"12\" fill=\"#263941\" stroke=\"#9eb7bd\" stroke-width=\"5\"\/><path d=\"M675 552 H895\" stroke=\"#e8c37b\" stroke-width=\"12\"\/><text x=\"635\" y=\"686\" font-size=\"23\" font-weight=\"700\">Cleat \/ support<\/text><text x=\"635\" y=\"718\" font-size=\"17\">avoid local sheath point loading<\/text>\n <path d=\"M975 555 H1110\" stroke=\"#a3444e\" stroke-width=\"38\"\/><path d=\"M975 555 H1110\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#inst-arrow)\"\/><rect x=\"1110\" y=\"395\" width=\"320\" height=\"300\" rx=\"15\" fill=\"#0b202b\" stroke=\"#62df9c\" stroke-width=\"4\"\/><rect x=\"1180\" y=\"480\" width=\"180\" height=\"115\" fill=\"#263941\" stroke=\"#a6c2c7\" stroke-width=\"6\"\/><path d=\"M1200 520 H1340 M1200 550 H1340\" stroke=\"#55dff7\" stroke-width=\"7\"\/><path d=\"M1270 595 V660\" stroke=\"#62df9c\" stroke-width=\"8\"\/><text x=\"1160\" y=\"650\" font-size=\"23\" font-weight=\"700\">Termination \/ switchgear<\/text><text x=\"1160\" y=\"683\" font-size=\"17\">screen bond and phase ID recorded<\/text>\n <path d=\"M460 560 A185 185 0 0 1 645 745\" fill=\"none\" stroke=\"#ff777f\" stroke-width=\"5\" stroke-dasharray=\"14 10\"\/><text x=\"350\" y=\"840\" font-size=\"24\" font-weight=\"700\" fill=\"#ffaaa5\">12 \u00d7 D minimum laying radius<\/text><text x=\"350\" y=\"874\" font-size=\"18\">12 \u00d7 31.7 mm = 380.4 mm derived radius for this source item.<\/text>\n <path d=\"M1430 555 H1780\" stroke=\"#62df9c\" stroke-width=\"4\"\/><text x=\"1460\" y=\"480\" font-size=\"23\" font-weight=\"700\" fill=\"#62df9c\">Acceptance checks<\/text><text x=\"1460\" y=\"520\" font-size=\"17\">conductor resistance<\/text><text x=\"1460\" y=\"550\" font-size=\"17\">screen continuity \/ bonding<\/text><text x=\"1460\" y=\"580\" font-size=\"17\">insulation \/ sheath tests<\/text><text x=\"1460\" y=\"610\" font-size=\"17\">phase formation \/ torque<\/text><text x=\"1460\" y=\"640\" font-size=\"17\">as-built route and marking<\/text>\n <text x=\"90\" y=\"975\" font-size=\"19\" fill=\"#ffaaa5\">N2XSH is a fixed-installation MV cable. Reeling, festoon, drag-chain or repeated torsion duty requires a cable family designed for that motion.<\/text>\n<\/g><\/svg><\/div>\n<ol><li>Confirm the drum label, cable reference, length, end seals, source OD and delivered mass before unloading.<\/li><li>Use the released 12 \u00d7 D laying factor. For the 31.7 mm reference OD, keep the centreline bending radius at or above 380.4 mm during laying; use a larger radius where the accessory or method statement requires it.<\/li><li>Align the drum and pay off in the marked direction. Prevent reverse winding, flange impact, uncontrolled twist and local sheath abrasion.<\/li><li>Use a controlled pulling method and verify the cable pulling load, sidewall pressure, support spacing and entry geometry from the current technical file.<\/li><li>Maintain the concentric screen, semi-conducting layers and XLPE insulation interface during preparation. Termination workmanship is part of dielectric reliability.<\/li><li>Bond the metallic screen according to the system earthing design. Verify continuity at every intended section and record the termination torque.<\/li><li>For parallel single-core systems, control phase formation, cleat forces, magnetic effects, spacing and screen currents. Do not treat the cable as a generic multicore feeder.<\/li><li>Before energisation, complete conductor resistance, screen continuity, insulation \/ sheath tests, MV withstand \/ partial-discharge tests where specified, phase identification, accessory inspection and as-built records.<\/li><\/ol>\n<div class=\"warn\"><b>Movement boundary:<\/b> N2XSH\u2019s 12 \u00d7 D value is a laying factor. It does not establish a continuous-flex, torsion, festoon, reel or drag-chain rating. Select a dedicated dynamic cable when the route moves repeatedly.<\/div>\n\n<h2>10. Selection comparison for engineers<\/h2>\n<div class=\"scroll\"><table><thead><tr><th>Requirement<\/th><th>N2XSH 1\u00d770\/25 mm\u00b2 reference<\/th><th>What must be verified<\/th><th>Engineering decision<\/th><\/tr><\/thead><tbody><tr><td class=\"key\">Fire-sensitive building \/ industrial route<\/td><td>Strong fit in the supplied reference: B2ca-s1,d0,a1, LSZH, IEC 60332-3 Cat. C<\/td><td>Current DoP, route configuration, fire barriers, local building rules and cable grouping<\/td><td class=\"source\">Suitable subject to current documentation<\/td><\/tr><tr><td class=\"key\">Fixed 12\/20 kV distribution<\/td><td>70 mm\u00b2 Cu \/ XLPE \/ copper screen \/ LSZH construction<\/td><td>System voltage, accessories, ampacity, voltage drop, short circuit and screen bonding<\/td><td class=\"source\">Suitable subject to calculation<\/td><\/tr><tr><td class=\"key\">Underground \/ duct route<\/td><td>Listed in the source application<\/td><td>Water ingress, duct thermal resistance, pulling load, sidewall pressure, drainage and rodent exposure<\/td><td class=\"source\">Confirm route construction<\/td><\/tr><tr><td class=\"key\">Outdoor plant<\/td><td>UV resistance and LSZH sheath listed<\/td><td>Solar heating, chemical exposure, support, impact and termination weather sealing<\/td><td class=\"source\">Suitable subject to environment review<\/td><\/tr><tr><td class=\"key\">High-current trefoil formation<\/td><td>239 A buried at 20 \u00b0C in trefoil is listed for this source item<\/td><td>Actual soil, depth, grouping, thermal resistivity, screen losses and protection settings<\/td><td class=\"source\">Use only for the stated basis<\/td><\/tr><tr><td class=\"key\">High-current flat formation in air<\/td><td>356 A at 30 \u00b0C in flat formation is listed<\/td><td>Spacing, support, solar load, ventilation, ambient and parallel-circuit effects<\/td><td class=\"source\">Use only for the stated basis<\/td><\/tr><tr><td class=\"key\">Reeling \/ drag chain \/ festoon<\/td><td>Not established by the fixed-installation reference<\/td><td>Cycle count, torsion, travel speed, acceleration, rollers, winding geometry and dynamic bend radius<\/td><td class=\"warn\">Select a dedicated dynamic cable<\/td><\/tr><\/tbody><\/table><\/div>\n<div class=\"svg\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1900 900\" role=\"img\" aria-label=\"N2XSH 12\/20 kV engineering selection and verification flow\">\n<defs><marker id=\"sel-arrow\" markerWidth=\"12\" markerHeight=\"12\" refX=\"10\" refY=\"4\" orient=\"auto\"><path d=\"M0 0 L12 4 L0 8 Z\" fill=\"#dcebf0\"\/><\/marker><\/defs>\n<rect width=\"1900\" height=\"900\" fill=\"#06131b\"\/><text x=\"60\" y=\"65\" fill=\"#55dff7\" font-family=\"Arial\" font-size=\"36\" font-weight=\"700\">N2XSH selection gate \u2014 fire class, formation and accessory compatibility<\/text>\n<g font-family=\"Arial\" fill=\"#eaf6fa\">\n <rect x=\"60\" y=\"245\" width=\"265\" height=\"170\" rx=\"14\" fill=\"#0b202b\" stroke=\"#55dff7\" stroke-width=\"4\"\/><text x=\"112\" y=\"305\" font-size=\"24\" font-weight=\"700\">1. System basis<\/text><text x=\"112\" y=\"340\" font-size=\"18\">12\/20 kV \u00b7 24 kV Um<\/text><text x=\"112\" y=\"372\" font-size=\"18\">fault level \/ load change<\/text><path d=\"M325 330 H440\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#sel-arrow)\"\/>\n <rect x=\"440\" y=\"195\" width=\"310\" height=\"270\" rx=\"14\" fill=\"#0b202b\" stroke=\"#e8c37b\" stroke-width=\"4\"\/><text x=\"495\" y=\"260\" font-size=\"24\" font-weight=\"700\" fill=\"#e8c37b\">2. Cable build<\/text><text x=\"495\" y=\"300\" font-size=\"18\">1\u00d770\/25 mm\u00b2<\/text><text x=\"495\" y=\"335\" font-size=\"18\">Cu \/ XLPE \/ Cu screen<\/text><text x=\"495\" y=\"370\" font-size=\"18\">LSZH \/ red sheath<\/text><text x=\"495\" y=\"405\" font-size=\"18\">class 2 RM conductor<\/text><path d=\"M750 330 H865\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#sel-arrow)\"\/>\n <rect x=\"865\" y=\"195\" width=\"310\" height=\"270\" rx=\"14\" fill=\"#0b202b\" stroke=\"#ff777f\" stroke-width=\"4\"\/><text x=\"920\" y=\"260\" font-size=\"24\" font-weight=\"700\" fill=\"#ffaaa5\">3. Fire \/ environment<\/text><text x=\"920\" y=\"300\" font-size=\"18\">B2ca-s1,d0,a1<\/text><text x=\"920\" y=\"335\" font-size=\"18\">IEC 60332-3 Cat. C<\/text><text x=\"920\" y=\"370\" font-size=\"18\">UV \/ rodent: Yes<\/text><text x=\"920\" y=\"405\" font-size=\"18\">\u221220 … 90 \u00b0C<\/text><path d=\"M1175 330 H1290\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#sel-arrow)\"\/>\n <rect x=\"1290\" y=\"195\" width=\"310\" height=\"270\" rx=\"14\" fill=\"#0b202b\" stroke=\"#62df9c\" stroke-width=\"4\"\/><text x=\"1345\" y=\"260\" font-size=\"24\" font-weight=\"700\" fill=\"#62df9c\">4. Installation<\/text><text x=\"1345\" y=\"300\" font-size=\"18\">12 \u00d7 D laying radius<\/text><text x=\"1345\" y=\"335\" font-size=\"18\">buried \/ duct \/ air<\/text><text x=\"1345\" y=\"370\" font-size=\"18\">flat \/ trefoil formation<\/text><text x=\"1345\" y=\"405\" font-size=\"18\">screen bonding<\/text><path d=\"M1600 330 H1710\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#sel-arrow)\"\/>\n <rect x=\"1710\" y=\"195\" width=\"140\" height=\"270\" rx=\"14\" fill=\"#0b202b\" stroke=\"#aa9bff\" stroke-width=\"4\"\/><text x=\"1730\" y=\"260\" font-size=\"21\" font-weight=\"700\" fill=\"#aa9bff\">5. Release<\/text><text x=\"1730\" y=\"305\" font-size=\"16\">data sheet<\/text><text x=\"1730\" y=\"340\" font-size=\"16\">DoP<\/text><text x=\"1730\" y=\"375\" font-size=\"16\">accessories<\/text><text x=\"1730\" y=\"410\" font-size=\"16\">inspection<\/text>\n <path d=\"M1015 465 V610\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#sel-arrow)\"\/><rect x=\"700\" y=\"610\" width=\"630\" height=\"170\" rx=\"14\" fill=\"#081b24\" stroke=\"#55dff7\" stroke-width=\"4\"\/><text x=\"765\" y=\"670\" font-size=\"25\" font-weight=\"700\" fill=\"#55dff7\">6. Verify before energisation<\/text><text x=\"765\" y=\"710\" font-size=\"18\">voltage drop \u00b7 ampacity \u00b7 short-circuit I\u00b2t \u00b7 PD \/ HV tests<\/text><text x=\"765\" y=\"742\" font-size=\"18\">screen continuity \u00b7 termination compatibility \u00b7 fire dossier<\/text>\n <path d=\"M700 695 H420\" stroke=\"#ff777f\" stroke-width=\"4\" marker-end=\"url(#sel-arrow)\"\/><rect x=\"70\" y=\"610\" width=\"350\" height=\"170\" rx=\"14\" fill=\"#081b24\" stroke=\"#ff777f\" stroke-width=\"4\"\/><text x=\"115\" y=\"670\" font-size=\"24\" font-weight=\"700\" fill=\"#ffaaa5\">If movement is continuous<\/text><text x=\"115\" y=\"710\" font-size=\"18\">reel \/ festoon \/ drag chain<\/text><text x=\"115\" y=\"745\" font-size=\"18\">select a dedicated dynamic cable<\/text>\n <text x=\"1350\" y=\"650\" font-size=\"18\" fill=\"#ffaaa5\">Do not fill blank source fields<\/text><text x=\"1350\" y=\"685\" font-size=\"18\" fill=\"#ffaaa5\">with a value from another cable.<\/text>\n<\/g><\/svg><\/div>\n\n<h2>11. Failure mode and effects analysis<\/h2>\n<div class=\"grid\"><div class=\"warn\"><b>Standard-basis mismatch:<\/b> IEC 60840 is copied into a 12\/20 kV purchase order without checking the current certificate and applicable voltage-class basis.<\/div><div class=\"warn\"><b>Fire-class substitution:<\/b> B2ca is assumed because the cable is LSZH, without checking the exact DoP and ordered construction.<\/div><div class=\"warn\"><b>Wrong ampacity:<\/b> 239 A or 356 A is copied into a different formation, ambient, soil, grouping or installation method.<\/div><div class=\"warn\"><b>Screen overload:<\/b> screen short-circuit current is left unresolved because the source shows \u201c\u2014 kA\u201d.<\/div><div class=\"warn\"><b>Radius violation:<\/b> a gland, trench corner or support bends the cable below 380.4 mm for the published 31.7 mm OD.<\/div><div class=\"warn\"><b>Termination damage:<\/b> semi-conducting screen or XLPE interface is prepared poorly, increasing partial-discharge risk.<\/div><div class=\"warn\"><b>Water ingress:<\/b> the source application says underground \/ duct, but the project does not close drainage, water blocking, end sealing or accessory protection.<\/div><div class=\"warn\"><b>Dynamic misuse:<\/b> a fixed N2XSH cable is placed in a reel, festoon or energy chain because the sheath appears robust.<\/div><\/div>\n\n<h2>12. Feichun Cable certification and project assurance<\/h2>\n<div class=\"note\"><b>Engineered for maximum safety in demanding environments<\/b>, Feichun Cable\u2019s cable systems comply with global standards including <b>ATEX, IECEx, VDE, CE, UKCA, EAC, and the Russian Fire Safety Certificate<\/b>. They are the trusted choice for heavy-duty mining equipment, ship-to-shore cranes, RTG\/RMG cranes, and conveyor systems where high reliability is non-negotiable.<\/div>\n<div class=\"grid\"><div class=\"box\"><b>For a Feichun N2XSH release<\/b><br>Confirm the exact product code, 12\/20 kV rating, 70 mm\u00b2 conductor, 25 mm\u00b2 screen, conductor resistance, OD, weight, formation ampacity, short-circuit duty, fire class, LSZH compounds, UV \/ rodent claims and accessory compatibility.<\/div><div class=\"box\"><b>Certification is configuration-specific<\/b><br>Company-level certification scope does not make every N2XSH size automatically B2ca, IEC 60840, IECEx, ATEX, EAC or fire-certified. The exact product, test report, DoP and market documentation must match.<\/div><div class=\"box\"><b>Fire documentation<\/b><br>For the B2ca configuration, the release should identify the CPR declaration, AVCP route, notified body where applicable, harmonized standard, fire-performance class and valid revision date.<\/div><div class=\"box\"><b>Feichun engineering value<\/b><br>Feichun can use the N2XSH architecture as a controlled fire-performance MV platform while adapting conductor, screen section, sheath, dimensions and project testing to the actual installation rather than copying a reference label.<\/div><\/div>\n<div class=\"warn\"><b>Release condition:<\/b> this article does not invent a Feichun certificate number, notified body, current ampacity, screen fault current, drum dimension or test report. Values not stated for the Feichun configuration must be confirmed in the current controlled technical file.<\/div>\n\n<h2>13. Source map and data-status audit<\/h2>\n<div class=\"scroll\"><table><thead><tr><th>Source<\/th><th>Use in this article<\/th><th>Status and limitation<\/th><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/www.nexans.com.tr\/en\/products\/xlpe-insulated-medium-voltage\/copper-conductor\/N2XSH-12-238452\/product~10590300~.html\" target=\"_blank\" rel=\"nofollow noopener\">Nexans T\u00fcrkiye N2XSH 1\u00d770\/25 mm\u00b2 product page<\/a><\/td><td>Product identity, reference number, EAN, construction, dimensional data, electrical data, usage characteristics, fire and environmental fields.<\/td><td>Manufacturer product reference; values are not silently converted into a Feichun catalogue release.<\/td><\/tr><tr><td><a href=\"https:\/\/www.nexans.com.tr\/en\/products\/xlpe-insulated-medium-voltage\/copper-conductor\/N2XSH-12-238452.html\" target=\"_blank\" rel=\"nofollow noopener\">Nexans T\u00fcrkiye N2XSH 12\/20 kV – B2ca family page<\/a><\/td><td>Family title, 1\u00d770\/25 mm\u00b2 product listing and 1000 m drum packaging context.<\/td><td>Manufacturer family page; confirm current availability and revision at quotation stage.<\/td><\/tr><tr><td><a href=\"https:\/\/www.nexans.com.tr\/.rest\/catalog\/v1\/product\/cpr\/10590300\" target=\"_blank\" rel=\"nofollow noopener\">Nexans Declaration of Performance 1001329-TRDE<\/a><\/td><td>B2ca-s1,d0,a1 declared reaction-to-fire performance, EN 50575:2014+A1:2016, AVCP System 1+, notified body 1008 and date.<\/td><td>Product-specific DoP; the exact ordered Feichun configuration needs its own current documentation.<\/td><\/tr><tr><td><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/63025\" target=\"_blank\" rel=\"nofollow noopener\">IEC 60840:2020 official publication record<\/a><\/td><td>Standard-scope review and the warning that the official page states above 30 kV (Um = 36 kV) to 150 kV (Um = 170 kV).<\/td><td>The source product page lists IEC 60840 for a 12\/20 kV item; clarify the controlled test basis before issuing a conformity claim.<\/td><\/tr><tr><td><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/32826\" target=\"_blank\" rel=\"nofollow noopener\">IEC 60332-3-24:2018 official publication record<\/a><\/td><td>Category C bunched-cable flame-spread test context, including the defined test-ladder conditions.<\/td><td>Test method reference; it is not itself a CPR B2ca declaration.<\/td><\/tr><\/tbody><\/table><\/div>\n<div class=\"warn\">This article is for preliminary engineering, technical search and comparison. The final Feichun N2XSH 12\/20 kV – B2ca release must be checked against the current product data sheet, test report, DoP, cable accessories, installation formation, project fire strategy and local authority requirements.<\/div>\n<\/main>\n<footer><div class=\"wrap\"><h3>Feichun Cable \u2014 N2XSH 12\/20 kV – B2ca engineering support<\/h3><div class=\"contact\"><div><b>Phone<\/b><br><a href=\"tel:+8613855123218\">+86 13855123218<\/a><\/div><div><b>Technical email<\/b><br><a href=\"mailto:Tech@feichuncables.com\">Tech@feichuncables.com<\/a><\/div><\/div><p class=\"small\">This article separates Nexans source values, derived checks and Feichun project-confirmation values. Missing fields are not filled from another supplier or cable size.<\/p><div>FEICHUN-N2XSH-12-20KV-B2CA-ENGINEERING-EN \u00b7 03 August 2026<\/div><\/div><\/footer>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"A full-English engineering guide for the N2XSH 1\u00d770\/25 mm\u00b2 (1×70\/25 mm2) single-core medium-voltage cable reference: stranded class 2 copper conductor, XLPE insulation, semi-conducting screens, concentric copper wire and copper tape screen, LSZH red sheath, UV resistance, rodent protection and B2ca-s1,d0,a1 declared fire performance.","protected":false},"author":1,"featured_media":25195,"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":[66,464,56,27157],"tags":[16,111,17],"class_list":["post-25194","post","type-post","status-publish","format-standard","has-post-thumbnail","category-common-problems-encountered-in-cable-applications","category-flexible-cables-with-high-bending-life-and-fatigue-resistance","category-reeling-cable","category-27157","tag-din-vde-0250","tag-mining-cable","tag-reeling-cable","cs-entry"],"_links":{"self":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/25194","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=25194"}],"version-history":[{"count":2,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/25194\/revisions"}],"predecessor-version":[{"id":25197,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/25194\/revisions\/25197"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media\/25195"}],"wp:attachment":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media?parent=25194"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/categories?post=25194"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/tags?post=25194"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":25194,"date":"2026-08-04T09:15:52","date_gmt":"2026-08-04T01:15:52","guid":{"rendered":"https:\/\/feichuncables.com\/blog\/?p=25194"},"modified":"2026-08-04T09:15:56","modified_gmt":"2026-08-04T01:15:56","slug":"feichun-n2xsh-12-20-kv-b2ca-fire-performance-medium-voltage-cable","status":"publish","type":"post","link":"https:\/\/feichuncables.com\/blog\/feichun-n2xsh-12-20-kv-b2ca-fire-performance-medium-voltage-cable\/","title":{"rendered":"Feichun N2XSH 12\/20 kV \u2014 B2ca Fire-Performance Medium-Voltage Cable"},"content":{"rendered":"\n