24G2.5 Crane Reeling Cable Specification Guide: 24\u00d72.5 mm\u00b2 Multi-Core Control Cable for STS, RTG & RMG Cranes \u2014 NSHT\u00d6U-J \/ PUR, VDE 0250-814, Anti-Torsion Braid, Stranding Pitch Engineering & FeiChun Equivalent | Feichun Cable<\/title>\n<meta name=\"description\" content=\"Definitive engineering specification guide for the 24G2.5 (24\u00d72.5 mm\u00b2) multi-core control reeling cable used in STS, RTG, and RMG crane automation systems. Covers DIN VDE 0250-814 and VDE 0250-818 compliance, optimised stranding pitch for equal-tension dynamic reeling, anti-torsion braid construction, 3GI3 EPR vs. TPE insulation selection, 5GM5 neoprene vs. PUR sheath comparison, core identification per IEC 60227, PLC signal integrity under continuous flexing, and the validated FeiChun NSHT\u00d6U-J 24G2.5 drop-in equivalent.\">\n<meta name=\"keywords\" content=\"24G2.5 reeling cable, 24x2.5mm2 crane cable, 24 core reeling cable, control reeling cable, multi core crane cable, NSHTOU 24G2.5, NSHTOU-J 24x2.5, PUR reeling cable 24G2.5, motorized drum control cable, heavy duty reeling cable, FeiChun reeling cable, FeiChun crane cable, VDE 0250-814 cable, VDE 0250-818 PUR reeling, STS crane control cable, RMG crane sensor cable, RTG crane wiring, anti torsion control cable, torsion resistant reeling, EPR insulation 3GI3, TPE insulation control cable, 5GM5 outer sheath, neoprene trailing cable, PUR crane cable, continuous flexing control cable, dynamic load reeling, corkscrew resistant cable, PLC control crane cable, numbered core reeling cable, tinned copper class 5, class 6 conductor cable, crane automation cable, limit switch cable crane, twist lock sensor cable, spreader control cable, heavy machinery wiring, European standard equivalent, Prysmian PROTOMONT alternative, Nexans RHEYFIRM equivalent, Lapp OLFLEX crane alternative, stranding pitch reeling cable, lay length crane cable, differential core travel, signal integrity reeling, low capacitance crane cable, crane cable commissioning, port crane electrification, direct factory reeling cable, FeiChun special cable, import substitution crane cable\">\n<meta name=\"author\" content=\"Anhui Feichun Special Cable Co., Ltd.\">\n<meta name=\"robots\" content=\"index, follow\">\n<meta property=\"og:title\" content=\"24G2.5 Crane Reeling Cable Specification Guide \u2014 24\u00d72.5 mm\u00b2 Multi-Core Control Cable for STS, RTG & RMG\">\n<meta property=\"og:description\" content=\"Engineering-grade specification guide for the 24G2.5 multi-core control reeling cable. Covers VDE 0250-814\/818 compliance, stranding pitch optimisation, anti-torsion braid, neoprene vs. PUR sheath selection, PLC signal integrity, and the FeiChun NSHT\u00d6U-J 24G2.5 drop-in equivalent.\">\n<meta property=\"og:type\" content=\"article\">\n<meta property=\"og:locale\" content=\"en_US\">\n<link rel=\"canonical\" href=\"https:\/\/feichuncables.com\/blog\/24g2-5-crane-reeling-cable-specification-guide\/\">\n\n<script type=\"application\/ld+json\">\n{\n \"@context\": \"https:\/\/schema.org\",\n \"@type\": \"TechArticle\",\n \"headline\": \"24G2.5 Crane Reeling Cable Specification Guide: 24\u00d72.5 mm\u00b2 Multi-Core Control Cable for STS, RTG & RMG Cranes\",\n \"description\": \"Definitive engineering specification guide for the 24G2.5 multi-core control reeling cable. Covers VDE 0250-814, anti-torsion braid, stranding pitch engineering, neoprene vs. PUR sheath selection, and the FeiChun NSHT\u00d6U-J 24G2.5 drop-in equivalent.\",\n \"author\": {\n \"@type\": \"Organization\",\n \"name\": \"Anhui Feichun Special Cable Co., Ltd.\",\n \"url\": \"https:\/\/feichuncables.com\"\n },\n \"publisher\": {\n \"@type\": \"Organization\",\n \"name\": \"Anhui Feichun Special Cable Co., Ltd.\"\n },\n \"datePublished\": \"2026-03-18\",\n \"dateModified\": \"2026-03-18\",\n \"mainEntityOfPage\": \"https:\/\/feichuncables.com\/blog\/24g2-5-crane-reeling-cable-specification-guide\/\",\n \"keywords\": \"24G2.5, 24x2.5mm2, crane reeling cable, multi-core control cable, NSHTOU-J, PUR, VDE 0250-814, FeiChun, anti-torsion braid, stranding pitch\",\n \"articleSection\": \"Technical Guides\",\n \"inLanguage\": [\"en\", \"zh-Hant\"]\n}\n<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link rel=\"preconnect\" 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1.6rem;margin-top:2.8rem;box-shadow:var(--sh-sm)}.reading h2{font-size:1.08rem;margin-bottom:.9rem;padding-bottom:.35rem;border-bottom:1px solid var(--b-light)}.reading-list{list-style:none;padding:0}.reading-list li{margin-bottom:.85rem;padding-bottom:.85rem;border-bottom:1px solid var(--b-light)}.reading-list li:last-child{margin-bottom:0;padding-bottom:0;border-bottom:none}.reading-list a{font-size:.92rem;font-weight:600;color:var(--c-link);text-decoration:none;display:block;margin-bottom:.15rem}.reading-list a:hover{color:var(--c-link-hover);text-decoration:underline}.reading-list .rdesc{font-size:.78rem;color:var(--c-tertiary);line-height:1.45}@media(max-width:600px){.page-wrap{padding:1.2rem 1rem 3rem}.hdr h1{font-size:1.35rem}.tw{font-size:.78rem;width:100%;overflow-x:auto}.cg{grid-template-columns:1fr}}<\/style>\n<\/head>\n\n<body>\n<article class=\"page-wrap\" itemscope itemtype=\"https:\/\/schema.org\/TechArticle\">\n\n <header class=\"hdr\">\n <span class=\"badge\">Feichun Cable \u2014 Multi-Core Control Reeling & Crane Automation<\/span>\n <h1 itemprop=\"headline\">24G2.5 Crane Reeling Cable Specification Guide: 24\u00d72.5 mm\u00b2 Multi-Core Control Cable for STS, RTG & RMG Cranes \u2014 NSHT\u00d6U-J \/ PUR, VDE 0250-814 \/ 0250-818, Anti-Torsion Braid, Stranding Pitch Engineering, and FeiChun Drop-In Equivalent<\/h1>\n <p class=\"sub\">A definitive engineering specification guide for port electrical engineers, crane automation integrators, and terminal procurement teams who need to specify, source, or replace the 24G2.5 (24\u00d72.5 mm\u00b2) multi-core control reeling cable \u2014 the critical signal backbone of modern container crane automation systems. This document covers every layer of the cable’s construction from the inside out: Class 5 and Class 6 tinned copper stranding options per IEC 60228, the precisely optimised stranding pitch (lay length) that equalises tensile stress across all 24 cores during dynamic bending, 3GI3 EPR versus TPE insulation selection criteria for signal integrity under continuous flexing, the vulcanised anti-torsion braid that prevents the catastrophic “corkscrewing” failure mode unique to high-core-count reeling cables, and the outer sheath decision between 5GM5 polychloroprene (neoprene) for maximum ozone\/UV\/saltwater resistance and polyurethane (PUR) for extreme mechanical abrasion environments. VDE compliance is mapped to both DIN VDE 0250-814 (rubber-sheathed reeling cables) and DIN VDE 0250-818 (PUR-sheathed reeling cables). Core identification follows IEC 60227 conventions: 23 black cores with white printed numbers plus one green\/yellow earth core. Typical applications include PLC I\/O signal transmission, twist-lock sensor feedback, limit switch circuits, anti-collision radar interfaces, load-cell data, and 24 VDC auxiliary power distribution on STS (Ship-to-Shore), RTG (Rubber-Tyred Gantry), RMG (Rail-Mounted Gantry), and heavy industrial overhead cranes.<\/p>\n <p class=\"sub-cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\u6458\u8981\uff1a<\/strong>\u672c\u6587\u70ba\u6e2f\u53e3\u96fb\u6c23\u5de5\u7a0b\u5e2b\u3001\u8d77\u91cd\u6a5f\u81ea\u52d5\u5316\u6574\u5408\u5546\u53ca\u78bc\u982d\u63a1\u8cfc\u5718\u968a\u7de8\u5beb\u7684\u6b0a\u5a01\u5de5\u7a0b\u898f\u683c\u6307\u5357\uff0c\u91dd\u5c0d 24G2.5\uff0824\u00d72.5 mm\u00b2\uff09\u591a\u82af\u63a7\u5236\u5377\u7e9c\u2014\u2014\u73fe\u4ee3\u96c6\u88dd\u7bb1\u8d77\u91cd\u6a5f\u81ea\u52d5\u5316\u7cfb\u7d71\u7684\u95dc\u9375\u4fe1\u865f\u9aa8\u5e79\u3002\u5167\u5bb9\u6db5\u84cb\u96fb\u7e9c\u5f9e\u5167\u5230\u5916\u7684\u6bcf\u4e00\u5c64\u7d50\u69cb\uff1aIEC 60228 \u7b2c 5 \u985e\u548c\u7b2c 6 \u985e\u934d\u932b\u9285\u7d5e\u7dda\u9078\u9805\u3001\u7cbe\u78ba\u512a\u5316\u7684\u7d5e\u7e9c\u7bc0\u8ddd\uff08\u7e9c\u8ddd\uff09\u4ee5\u5728\u52d5\u614b\u5f4e\u66f2\u6642\u5747\u8861\u5168\u90e8 24 \u82af\u7684\u62c9\u4f38\u61c9\u529b\u30013GI3 EPR \u8207 TPE \u7d55\u7de3\u5728\u6301\u7e8c\u5f4e\u66f2\u4e0b\u4fe1\u865f\u5b8c\u6574\u6027\u7684\u9078\u64c7\u6e96\u5247\u3001\u9632\u6b62\u9ad8\u82af\u6578\u5377\u7e9c\u7368\u6709\u4e4b\u300c\u87ba\u65cb\u8b8a\u5f62\u300d\u5931\u6548\u6a21\u5f0f\u7684\u786b\u5316\u6297\u626d\u8f49\u7de8\u7e54\u5c64\uff0c\u4ee5\u53ca 5GM5 \u6c2f\u4e01\u6a61\u81a0\uff08\u8010\u81ed\u6c27\/\u7d2b\u5916\u7dda\/\u6d77\u6c34\uff09\u8207\u805a\u6c28\u916f\uff08PUR\uff0c\u6975\u7aef\u6a5f\u68b0\u78e8\u640d\u74b0\u5883\uff09\u5916\u8b77\u5957\u7684\u9078\u64c7\u6c7a\u7b56\u3002\u6a19\u6e96\u5408\u898f\u5c0d\u61c9 DIN VDE 0250-814\uff08\u6a61\u81a0\u8b77\u5957\u5377\u7e9c\uff09\u548c DIN VDE 0250-818\uff08PUR \u8b77\u5957\u5377\u7e9c\uff09\u3002\u5178\u578b\u61c9\u7528\u5305\u62ec PLC I\/O \u4fe1\u865f\u50b3\u8f38\u3001\u65cb\u9396\u611f\u6e2c\u5668\u56de\u994b\u3001\u9650\u4f4d\u958b\u95dc\u96fb\u8def\u3001\u9632\u78b0\u649e\u96f7\u9054\u4ecb\u9762\u3001\u8377\u91cd\u5143\u6578\u64da\u53ca 24 VDC \u8f14\u52a9\u96fb\u6e90\u914d\u96fb\u3002<\/p>\n <div class=\"meta\">\n <span itemprop=\"author\" itemscope itemtype=\"https:\/\/schema.org\/Organization\"><span itemprop=\"name\">Anhui Feichun Special Cable Co., Ltd.<\/span><\/span>\n <span>|<\/span>\n <time itemprop=\"datePublished\" datetime=\"2026-03-18\">18 March 2026<\/time>\n <span>|<\/span>\n <span>Reading time: ~42 min<\/span>\n <\/div>\n <\/header>\n\n <nav class=\"toc\">\n <div class=\"toc-label\">Table of Contents<\/div>\n <ol>\n <li><a href=\"#s1\">Why the 24G2.5 Is the Most Failure-Critical Cable on a Modern Container Crane<\/a><\/li>\n <li><a href=\"#s2\">Full Technical Specification: 24G2.5 NSHT\u00d6U-J and PUR Variants<\/a><\/li>\n <li><a href=\"#s3\">Differential Core Travel: The Physics Behind Multi-Core Reeling Failure<\/a><\/li>\n <li><a href=\"#s4\">Stranding Pitch Engineering: Optimising Lay Length for Equal-Tension Reeling<\/a><\/li>\n <li><a href=\"#s5\">Conductor Selection: Class 5 vs. Class 6 Stranding for 2.5 mm\u00b2 Cores<\/a><\/li>\n <li><a href=\"#s6\">Insulation: 3GI3 EPR vs. TPE for Signal Integrity Under Cyclic Flexing<\/a><\/li>\n <li><a href=\"#s7\">The Anti-Torsion Braid in Multi-Core Cables: Why 24 Cores Need It More Than 4<\/a><\/li>\n <li><a href=\"#s8\">Outer Sheath Decision: 5GM5 Neoprene vs. Polyurethane (PUR)<\/a><\/li>\n <li><a href=\"#s9\">Core Identification and Numbering per IEC 60227 \/ VDE 0293<\/a><\/li>\n <li><a href=\"#s10\">Signal Integrity: Capacitance, Crosstalk, and EMI in Dynamic Reeling<\/a><\/li>\n <li><a href=\"#s11\">Slip-Clutch Tension Calculation for 24G2.5 Configurations<\/a><\/li>\n <li><a href=\"#s12\">FeiChun NSHT\u00d6U-J 24G2.5: Construction Parity and Drop-In Validation<\/a><\/li>\n <li><a href=\"#s13\">Installation, Commissioning, and Diagnostic Protocol for Control Reeling Cables<\/a><\/li>\n <li><a href=\"#s14\">Recommended Reading: Related FeiChun Technical Guides<\/a><\/li>\n <\/ol>\n <\/nav>\n\n <div class=\"body\" itemprop=\"articleBody\">\n\n \n <h2 id=\"s1\">1. Why the 24G2.5 Is the Most Failure-Critical Cable on a Modern Container Crane<\/h2>\n\n <p><strong>A modern STS or RTG crane carries two categories of reeling cable: the power cable (typically 3\u20134 cores at 50\u2013150 mm\u00b2) that delivers megawatts of main drive power, and the control cable (typically 12\u201336 cores at 1.5\u20134.0 mm\u00b2) that transmits every sensor reading, limit switch state, and PLC command that governs the crane’s automated operation.<\/strong> When the power cable fails, the crane stops \u2014 but the failure mode is obvious (loss of supply, trip on overcurrent) and the crane halts safely. When the control cable fails, the consequences are far more insidious: intermittent signal dropouts cause erratic spreader behaviour, phantom twist-lock alarms, false anti-collision triggers, and diagnostic error codes that send maintenance teams on hours-long troubleshooting exercises \u2014 all while the crane continues to operate in a degraded, potentially unsafe mode.<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u7576\u52d5\u529b\u96fb\u7e9c\u5931\u6548\u6642\uff0c\u8d77\u91cd\u6a5f\u505c\u6b62\u904b\u884c\u2014\u2014\u4f46\u5931\u6548\u6a21\u5f0f\u986f\u800c\u6613\u898b\u3002\u7576\u63a7\u5236\u96fb\u7e9c\u5931\u6548\u6642\uff0c\u5f8c\u679c\u9060\u66f4\u96b1\u853d\uff1a\u9593\u6b47\u6027\u4fe1\u865f\u4e2d\u65b7\u5c0e\u81f4\u540a\u5177\u884c\u70ba\u7570\u5e38\u3001\u65cb\u9396\u865b\u5047\u5831\u8b66\u3001\u9632\u78b0\u649e\u8aa4\u89f8\u767c\u548c\u8a3a\u65b7\u932f\u8aa4\u4ee3\u78bc\uff0c\u8feb\u4f7f\u7dad\u8b77\u5718\u968a\u82b1\u8cbb\u6578\u5c0f\u6642\u6392\u67e5\u554f\u984c\u2014\u2014\u800c\u8d77\u91cd\u6a5f\u5728\u6b64\u671f\u9593\u6301\u7e8c\u4ee5\u964d\u7d1a\u4e14\u53ef\u80fd\u4e0d\u5b89\u5168\u7684\u6a21\u5f0f\u904b\u884c\u3002<\/p>\n\n <p>The 24G2.5 configuration \u2014 24 cores of 2.5 mm\u00b2 each \u2014 has emerged as the industry-standard multi-core control reeling specification because it provides sufficient core count for a complete crane control system (typically requiring 18\u201322 active signal\/power circuits plus 1\u20132 spare cores for future expansion) with a conductor cross-section (2.5 mm\u00b2) that balances current-carrying capacity for mixed signal and 24 VDC auxiliary loads (rated at approximately 25 A per core in free air per <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/2766\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60364-5-52 Table B.52.4<\/a>) against the cable’s overall outer diameter and weight, which must remain within the mechanical limits of the crane’s control cable reel.<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>24G2.5 \u914d\u7f6e\u2014\u201424 \u82af\u5404 2.5 mm\u00b2\u2014\u2014\u5df2\u6210\u70ba\u884c\u696d\u6a19\u6e96\u7684\u591a\u82af\u63a7\u5236\u5377\u7e9c\u898f\u683c\uff0c\u56e0\u70ba\u5b83\u70ba\u5b8c\u6574\u7684\u8d77\u91cd\u6a5f\u63a7\u5236\u7cfb\u7d71\u63d0\u4f9b\u4e86\u8db3\u5920\u7684\u82af\u6578\uff08\u901a\u5e38\u9700\u8981 18\u201322 \u689d\u6709\u6548\u4fe1\u865f\/\u96fb\u6e90\u56de\u8def\u52a0 1\u20132 \u689d\u5099\u7528\u82af\u7dda\uff09\uff0c\u4e14\u5c0e\u9ad4\u622a\u9762\uff082.5 mm\u00b2\uff09\u5728\u8f09\u6d41\u80fd\u529b\u8207\u96fb\u7e9c\u6574\u9ad4\u5916\u5f91\u548c\u91cd\u91cf\u4e4b\u9593\u53d6\u5f97\u5e73\u8861\u3002<\/p>\n\n <p>The engineering challenge is that a 24-core cable is intrinsically far more susceptible to internal mechanical failure under reeling duty than a 3- or 4-core power cable. With 24 individual cores arranged in concentric layers around a central filler, the cores in the outermost layer travel a measurably longer path around each bend than the cores at the cable centre. Over thousands of reeling cycles, this differential path length creates differential tensile stress \u2014 and if the cable’s stranding pitch (lay length) and anti-torsion braid are not precisely engineered for this specific core count, the result is progressive core migration, twisting, bunching, and ultimately the fracture of individual copper conductors that manifests as the intermittent signal failures described above. This guide provides the engineering detail required to specify, procure, and install a 24G2.5 reeling cable that will survive its full rated service life of 20,000\u201350,000 cycles without a single core failure.<\/p>\n\n \n <h2 id=\"s2\">2. Full Technical Specification: 24G2.5 NSHT\u00d6U-J and PUR Variants<\/h2>\n\n <p><strong>The 24G2.5 reeling cable is available in two outer-sheath variants \u2014 the NSHT\u00d6U-J (neoprene-sheathed, per DIN VDE 0250-814) and the PUR-reeling variant (polyurethane-sheathed, per DIN VDE 0250-818).<\/strong> Both variants share identical internal construction (conductors, insulation, stranding, anti-torsion braid, inner sheath) and differ only in the outer sheath compound. The following table provides the complete specification.<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>24G2.5 \u5377\u7e9c\u6709\u5169\u7a2e\u5916\u8b77\u5957\u578b\u865f\u2014\u2014NSHT\u00d6U-J\uff08\u6c2f\u4e01\u6a61\u81a0\u8b77\u5957\uff0c\u4f9d\u64da DIN VDE 0250-814\uff09\u548c PUR \u5377\u7e9c\u578b\u865f\uff08\u805a\u6c28\u916f\u8b77\u5957\uff0c\u4f9d\u64da DIN VDE 0250-818\uff09\u3002\u5169\u7a2e\u578b\u865f\u5167\u90e8\u7d50\u69cb\u5b8c\u5168\u76f8\u540c\uff0c\u50c5\u5916\u8b77\u5957\u5316\u5408\u7269\u4e0d\u540c\u3002<\/p>\n\n <div class=\"tw\">\n <caption>Table 1 \u2014 Complete Technical Specification: 24G2.5 Control Reeling Cable<\/caption>\n <table>\n <thead>\n <tr>\n <th>Parameter<\/th>\n <th>NSHT\u00d6U-J 24G2.5 (Neoprene)<\/th>\n <th>PUR 24G2.5 (Polyurethane)<\/th>\n <th>Governing Standard<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>VDE Standard<\/td>\n <td>DIN VDE 0250-814<\/td>\n <td>DIN VDE 0250-818<\/td>\n <td>VDE 0250 series<\/td>\n <\/tr>\n <tr>\n <td>Core Configuration<\/td>\n <td colspan=\"2\">24G2.5 mm\u00b2 (23 black + 1 green\/yellow PE)<\/td>\n <td>VDE 0293 \/ IEC 60227<\/td>\n <\/tr>\n <tr>\n <td>Rated Voltage (U\u2080\/U)<\/td>\n <td colspan=\"2\">0.6\/1 kV<\/td>\n <td>VDE 0250-814 \/ -818<\/td>\n <\/tr>\n <tr>\n <td>Conductor Material<\/td>\n <td colspan=\"2\">Tinned electrolytic copper, Class 5 (standard) or Class 6 (premium)<\/td>\n <td><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/1065\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60228<\/a><\/td>\n <\/tr>\n <tr>\n <td>Max. Wire Diameter<\/td>\n <td colspan=\"2\">\u2264 0.16 mm (Class 5) \/ \u2264 0.10 mm (Class 6)<\/td>\n <td>IEC 60228 Table 4<\/td>\n <\/tr>\n <tr>\n <td>Conductor Resistance (20\u00b0C)<\/td>\n <td colspan=\"2\">\u2264 7.98 \u03a9\/km (Class 5) \/ \u2264 8.21 \u03a9\/km (Class 6)<\/td>\n <td>IEC 60228<\/td>\n <\/tr>\n <tr>\n <td>Insulation Compound<\/td>\n <td>EPR, Type 3GI3 (peroxide-cured)<\/td>\n <td>TPE or EPR, Type 3GI3<\/td>\n <td>VDE material tables<\/td>\n <\/tr>\n <tr>\n <td>Insulation Wall Thickness<\/td>\n <td colspan=\"2\">\u2265 0.8 mm (2.5 mm\u00b2 per VDE 0250-814 Table 3)<\/td>\n <td>VDE 0250-814<\/td>\n <\/tr>\n <tr>\n <td>Core Identification<\/td>\n <td colspan=\"2\">23 black cores, white inkjet numbered 1\u201323; 1 green\/yellow PE<\/td>\n <td>VDE 0293-308 \/ IEC 60227<\/td>\n <\/tr>\n <tr>\n <td>Stranding Lay Type<\/td>\n <td colspan=\"2\">Concentric SZ-stranding, optimised lay length 12\u201316\u00d7 cable OD<\/td>\n <td>Manufacturer spec (VDE-enhanced)<\/td>\n <\/tr>\n <tr>\n <td>Anti-Torsion Braid<\/td>\n <td colspan=\"2\">High-tensile polyester or Kevlar, vulcanised between inner and outer sheaths<\/td>\n <td>Manufacturer spec<\/td>\n <\/tr>\n <tr>\n <td>Inner Sheath<\/td>\n <td>Neoprene (CR), 5GM5<\/td>\n <td>TPU inner compound<\/td>\n <td>VDE material tables<\/td>\n <\/tr>\n <tr>\n <td>Outer Sheath<\/td>\n <td>Polychloroprene (CR), 5GM5, black or custom RAL<\/td>\n <td>Polyurethane (PUR), high-abrasion grade<\/td>\n <td>VDE 0250-814 \/ -818<\/td>\n <\/tr>\n <tr>\n <td>Outer Diameter (approx.)<\/td>\n <td>~32\u201338 mm<\/td>\n <td>~30\u201336 mm<\/td>\n <td>Manufacturer datasheet<\/td>\n <\/tr>\n <tr>\n <td>Cable Weight (approx.)<\/td>\n <td>~2.2\u20132.8 kg\/m<\/td>\n <td>~2.0\u20132.5 kg\/m<\/td>\n <td>Manufacturer datasheet<\/td>\n <\/tr>\n <tr>\n <td>Max. Dynamic Tensile Stress<\/td>\n <td colspan=\"2\">15 N\/mm\u00b2 \u00d7 total copper cross-section = 15 \u00d7 (24 \u00d7 2.5) = 900 N max<\/td>\n <td>VDE 0250-814 Annex A<\/td>\n <\/tr>\n <tr>\n <td>Travel Speed<\/td>\n <td>Up to 120 m\/min<\/td>\n <td>Up to 180 m\/min<\/td>\n <td>Manufacturer validation<\/td>\n <\/tr>\n <tr>\n <td>Temperature Range (dynamic)<\/td>\n <td>-25\u00b0C to +80\u00b0C<\/td>\n <td>-30\u00b0C to +80\u00b0C<\/td>\n <td>VDE 0250-814 \/ -818<\/td>\n <\/tr>\n <tr>\n <td>Min. Bending Radius (dynamic)<\/td>\n <td colspan=\"2\">7.5 \u00d7 OD<\/td>\n <td>VDE 0250-814<\/td>\n <\/tr>\n <tr>\n <td>Flex Life (rated cycles)<\/td>\n <td>20,000\u201350,000 full-travel cycles<\/td>\n <td>30,000\u201380,000 full-travel cycles<\/td>\n <td>VDE 0250-814 \/ -818 Cl. 6.4<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n \n <h2 id=\"s3\">3. Differential Core Travel: The Physics Behind Multi-Core Reeling Failure<\/h2>\n\n <p><strong>The single most important concept to understand about multi-core reeling cables is differential core travel \u2014 the geometric fact that when a multi-layer assembly of cylindrical cores is bent around a drum, cores on the outside of the bend travel a longer path than cores on the inside.<\/strong> In a 3-core power cable (where all cores are in a single concentric layer), this effect is minimal because the path-length difference between any two cores is small relative to each core’s absolute length. In a 24-core cable, where the cores are arranged in at least three concentric layers (typically 1 central filler + 6 cores in layer 1 + 12 cores in layer 2 + 6 cores in layer 3, or similar arrangements), the outermost core travels measurably farther than the innermost core at every bend.<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u7406\u89e3\u591a\u82af\u5377\u7e9c\u7684\u6700\u6838\u5fc3\u6982\u5ff5\u662f\u5dee\u7570\u6027\u82af\u7dda\u884c\u7a0b\u2014\u2014\u7576\u591a\u5c64\u5713\u67f1\u5f62\u82af\u7dda\u7d44\u4ef6\u7e5e\u5377\u7b52\u5f4e\u66f2\u6642\uff0c\u5f4e\u66f2\u5916\u5074\u7684\u82af\u7dda\u6bd4\u5167\u5074\u7684\u82af\u7dda\u8d70\u904e\u66f4\u9577\u7684\u8def\u5f91\u3002\u5728 3 \u82af\u52d5\u529b\u96fb\u7e9c\u4e2d\uff0c\u6b64\u6548\u61c9\u5fae\u5c0f\uff1b\u800c\u5728 24 \u82af\u96fb\u7e9c\u4e2d\uff0c\u82af\u7dda\u81f3\u5c11\u6392\u5217\u6210\u4e09\u500b\u540c\u5fc3\u5c64\uff0c\u6700\u5916\u5c64\u82af\u7dda\u5728\u6bcf\u6b21\u5f4e\u66f2\u6642\u884c\u7a0b\u986f\u8457\u9577\u65bc\u6700\u5167\u5c64\u82af\u7dda\u3002<\/p>\n\n <p>The mathematics are straightforward. Consider a cable with outer diameter D = 35 mm, wound around a drum with core diameter d_drum = 350 mm (which satisfies the 7.5\u00d7 OD minimum: 7.5 \u00d7 35 = 262.5 mm). The radius of curvature at the cable centre is R_c = (d_drum + D) \/ 2 = 192.5 mm. A core positioned at the outermost layer (approximately 12 mm from the cable centre) bends at radius R_outer = 192.5 + 12 = 204.5 mm, while a core at the innermost layer (approximately 5 mm from centre) bends at R_inner = 192.5 – 5 = 187.5 mm. For a single 180\u00b0 bend (half a drum revolution), the outer core travels \u03c0 \u00d7 204.5 = 642.5 mm while the inner core travels \u03c0 \u00d7 187.5 = 589.0 mm \u2014 a difference of 53.5 mm per half-revolution. Over a 200-metre cable payout that involves approximately 180 drum revolutions (on a 350 mm drum), the cumulative differential travel is approximately 180 \u00d7 2 \u00d7 53.5 = 19,260 mm \u2014 nearly 20 metres of relative slippage between the outermost and innermost cores.<\/p>\n\n <div class=\"formula\">\n \u0394L per revolution = 2\u03c0 \u00d7 (R_outer \u2212 R_inner) = 2\u03c0 \u00d7 (r_outermost_core \u2212 r_innermost_core)<br>\n For 24G2.5: \u0394L \u2248 2\u03c0 \u00d7 (12 \u2212 5) = 2\u03c0 \u00d7 7 \u2248 44 mm per revolution\n <\/div>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u8a08\u7b97\u8868\u660e\uff1a\u5728 200 \u7c73\u96fb\u7e9c\u653e\u51fa\u904e\u7a0b\u4e2d\u6d89\u53ca\u7d04 180 \u5708\u5377\u7b52\u65cb\u8f49\uff0c\u6700\u5916\u5c64\u548c\u6700\u5167\u5c64\u82af\u7dda\u4e4b\u9593\u7684\u7d2f\u8a08\u5dee\u7570\u884c\u7a0b\u7d04\u70ba 19,260 mm\u2014\u2014\u63a5\u8fd1 20 \u7c73\u7684\u76f8\u5c0d\u6ed1\u79fb\u3002\u5982\u679c\u96fb\u7e9c\u8a2d\u8a08\u4e0d\u80fd\u5bb9\u7d0d\u6b64\u5dee\u7570\u884c\u7a0b\uff0c\u82af\u7dda\u5c07\u626d\u66f2\u3001\u5806\u7a4d\u4e26\u6700\u7d42\u65b7\u88c2\u3002<\/p>\n\n <p>If the cable’s construction cannot accommodate this differential travel, the outer cores are placed under progressively increasing tensile stress (because they are being forced to travel farther while being physically constrained within the cable assembly), while the inner cores experience compressive buckling. Over thousands of cycles, this stress accumulation causes the cores to migrate from their designed positions within the cable cross-section \u2014 a process known as “core migration” or “bird-caging.” Once migration begins, it becomes self-reinforcing: a displaced core occupies space intended for an adjacent core, which is then also displaced, creating a cascade of positional errors that ultimately leads to the visible “corkscrew” deformation of the entire cable assembly. The stranding pitch and anti-torsion braid \u2014 detailed in Sections 4 and 7 \u2014 are the two engineering solutions to this problem.<\/p>\n\n \n <h2 id=\"s4\">4. Stranding Pitch Engineering: Optimising Lay Length for Equal-Tension Reeling<\/h2>\n\n <p><strong>The stranding pitch \u2014 also called the lay length \u2014 is the axial distance required for one complete helical revolution of a core around the cable’s central axis.<\/strong> In a 24G2.5 reeling cable, the lay length is the single most important manufacturing parameter because it directly controls how differential core travel is distributed along the cable’s length. An incorrectly set lay length is the root cause of the majority of multi-core reeling cable failures, and it is the parameter most commonly compromised by non-specialised manufacturers attempting to produce reeling cables on general-purpose stranding equipment.<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u7d5e\u7e9c\u7bc0\u8ddd\uff08\u7e9c\u8ddd\uff09\u2014\u2014\u5373\u4e00\u6839\u82af\u7dda\u7e5e\u96fb\u7e9c\u4e2d\u5fc3\u8ef8\u5b8c\u6210\u4e00\u5708\u87ba\u65cb\u6240\u9700\u7684\u8ef8\u5411\u8ddd\u96e2\u2014\u2014\u662f 24G2.5 \u5377\u7e9c\u4e2d\u6700\u91cd\u8981\u7684\u88fd\u9020\u53c3\u6578\uff0c\u56e0\u70ba\u5b83\u76f4\u63a5\u63a7\u5236\u5dee\u7570\u6027\u82af\u7dda\u884c\u7a0b\u5982\u4f55\u6cbf\u96fb\u7e9c\u9577\u5ea6\u5206\u914d\u3002\u8a2d\u5b9a\u4e0d\u6b63\u78ba\u7684\u7e9c\u8ddd\u662f\u591a\u82af\u5377\u7e9c\u5931\u6548\u7684\u4e3b\u8981\u6839\u672c\u539f\u56e0\u3002<\/p>\n\n <p>The physics of lay-length optimisation is rooted in a concept from classical mechanics: when a helically wound element is bent around a radius, the helix acts as a spring that allows each element to accommodate differential path lengths by slightly elongating or compressing along its helical path without being placed under excessive axial tension. The optimal lay length creates a helix angle at which the differential travel per drum revolution is exactly absorbed by the helical “spring effect” \u2014 meaning the outer cores extend slightly along their helix and the inner cores compress slightly, with no net change in axial tension on any individual core. Per the helical spring mechanics described in <a href=\"https:\/\/www.springer.com\/gp\/book\/9783540206972\" rel=\"nofollow noopener\" target=\"_blank\">Feyrer’s “Wire Ropes” (Springer, 2007)<\/a> and adapted for multi-core cable geometry, the optimal lay length for a reeling cable is typically 12\u201316\u00d7 the cable outer diameter, with the exact value depending on the number of core layers, the layer radii, and the drum diameter.<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u7e9c\u8ddd\u512a\u5316\u7684\u7269\u7406\u5b78\u6839\u690d\u65bc\u7d93\u5178\u529b\u5b78\u6982\u5ff5\uff1a\u7576\u87ba\u65cb\u7e8f\u7e5e\u7684\u5143\u4ef6\u7e5e\u534a\u5f91\u5f4e\u66f2\u6642\uff0c\u87ba\u65cb\u7d50\u69cb\u50cf\u5f48\u7c27\u4e00\u6a23\u5141\u8a31\u6bcf\u500b\u5143\u4ef6\u901a\u904e\u6cbf\u5176\u87ba\u65cb\u8def\u5f91\u7565\u5fae\u4f38\u9577\u6216\u58d3\u7e2e\u4f86\u9069\u61c9\u5dee\u7570\u6027\u8def\u5f91\u9577\u5ea6\uff0c\u800c\u4e0d\u627f\u53d7\u904e\u5927\u7684\u8ef8\u5411\u5f35\u529b\u3002\u6700\u4f73\u7e9c\u8ddd\u901a\u5e38\u70ba\u96fb\u7e9c\u5916\u5f91\u7684 12\u201316 \u500d\u3002<\/p>\n\n <p>For a 24G2.5 cable with an OD of approximately 35 mm, the optimal lay-length window is 420\u2013560 mm (12\u00d7 to 16\u00d7 OD). Within this window, the exact value is fine-tuned based on the stranding configuration. FeiChun uses a concentric SZ-stranding pattern (also known as reversing-lay stranding), where each concentric layer is wound in the opposite rotational direction to the layer below it, and the lay direction reverses at regular intervals along the cable length. This SZ pattern provides two critical advantages over unidirectional stranding. First, it eliminates the residual torsional moment that would otherwise cause the cable to twist when tensioned \u2014 because the clockwise torque from one layer is balanced by the counter-clockwise torque from the adjacent layer. Second, the reversing points act as strain-relief anchors that prevent cumulative differential-travel stress from propagating over long cable lengths; instead, the stress is distributed in short segments between each reversal point.<\/p>\n\n <div class=\"note green\">\n <div class=\"nt\">Manufacturing Specification \u88fd\u9020\u898f\u683c<\/div>\n <p>FeiChun’s 24G2.5 cables are manufactured on a planetary-cage stranding line with individually servo-controlled bobbin stations, allowing real-time adjustment of lay length to within \u00b12 mm precision. The lay-length tolerance for every production reel is verified by measuring the helix pitch at 5 randomly selected points along the cable using a laser-triangulation sensor, with all measurements documented in the cable’s quality certificate. \u98db\u7d14\u7684 24G2.5 \u96fb\u7e9c\u5728\u884c\u661f\u7c60\u5f0f\u7d5e\u7e9c\u751f\u7522\u7dda\u4e0a\u88fd\u9020\uff0c\u914d\u5099\u5404\u81ea\u4f3a\u670d\u63a7\u5236\u7684\u7dda\u8ef8\u7ad9\uff0c\u5141\u8a31\u5373\u6642\u8abf\u6574\u7e9c\u8ddd\u81f3 \u00b12 mm \u7cbe\u5ea6\u7bc4\u570d\u5167\u3002<\/p>\n <\/div>\n\n \n <h2 id=\"s5\">5. Conductor Selection: Class 5 vs. Class 6 Stranding for 2.5 mm\u00b2 Cores<\/h2>\n\n <p><strong><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/1065\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60228<\/a> defines two flexibility classes that are relevant for reeling cable conductors: Class 5 (flexible) and Class 6 (extra-flexible, for cables requiring increased flexibility).<\/strong> For the 2.5 mm\u00b2 conductor size used in the 24G2.5 configuration, the practical differences between these two classes have significant implications for both flex life and cost.<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>IEC 60228 \u5b9a\u7fa9\u4e86\u5169\u500b\u8207\u5377\u7e9c\u5c0e\u9ad4\u76f8\u95dc\u7684\u6493\u6027\u7b49\u7d1a\uff1a\u7b2c 5 \u985e\uff08\u6493\u6027\uff09\u548c\u7b2c 6 \u985e\uff08\u8d85\u6493\u6027\uff0c\u7528\u65bc\u9700\u8981\u66f4\u9ad8\u6493\u6027\u7684\u96fb\u7e9c\uff09\u3002\u5c0d\u65bc 24G2.5 \u914d\u7f6e\u4e2d\u4f7f\u7528\u7684 2.5 mm\u00b2 \u5c0e\u9ad4\uff0c\u9019\u5169\u500b\u7b49\u7d1a\u4e4b\u9593\u7684\u5be6\u969b\u5dee\u7570\u5c0d\u5f4e\u66f2\u58fd\u547d\u548c\u6210\u672c\u90fd\u6709\u91cd\u8981\u5f71\u97ff\u3002<\/p>\n\n <div class=\"tw\">\n <caption>Table 2 \u2014 Class 5 vs. Class 6 Conductor Comparison for 2.5 mm\u00b2<\/caption>\n <table>\n <thead>\n <tr>\n <th>Parameter<\/th>\n <th>Class 5<\/th>\n <th>Class 6<\/th>\n <th>Implication for 24G2.5<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>Max. wire diameter<\/td>\n <td>0.16 mm<\/td>\n <td>0.10 mm<\/td>\n <td>Class 6 wires are 37.5% thinner<\/td>\n <\/tr>\n <tr>\n <td>Min. wire count (2.5 mm\u00b2)<\/td>\n <td>~127 wires<\/td>\n <td>~320 wires<\/td>\n <td>Class 6 has 2.5\u00d7 more wires per core<\/td>\n <\/tr>\n <tr>\n <td>Max. DC resistance (20\u00b0C)<\/td>\n <td>7.98 \u03a9\/km<\/td>\n <td>8.21 \u03a9\/km<\/td>\n <td>Class 6 slightly higher (more air gaps)<\/td>\n <\/tr>\n <tr>\n <td>Min. bending radius (dynamic)<\/td>\n <td>7.5 \u00d7 OD<\/td>\n <td>6.0 \u00d7 OD<\/td>\n <td>Class 6 allows tighter drum radius<\/td>\n <\/tr>\n <tr>\n <td>Rated flex cycles (typical)<\/td>\n <td>20,000\u201350,000<\/td>\n <td>40,000\u2013100,000<\/td>\n <td>Class 6 doubles the flex life<\/td>\n <\/tr>\n <tr>\n <td>Cost premium<\/td>\n <td>Baseline<\/td>\n <td>+15\u201325%<\/td>\n <td>Higher wire count = more processing<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>The fundamental principle is that thinner wires bend with lower strain at the wire surface. The bending strain in a solid circular wire is given by \u03b5 = d_wire \/ (2 \u00d7 R_bend), where d_wire is the wire diameter and R_bend is the bending radius. For a Class 5 wire (0.16 mm) bending at 7.5\u00d7 OD on a 35 mm cable (R_bend \u2248 131 mm): \u03b5 = 0.16 \/ (2 \u00d7 131) = 0.061% \u2014 well below the copper fatigue limit of approximately 0.2% per <a href=\"https:\/\/www.copper.org\/applications\/electrical\/pq\/Fatigue_Properties_of_Copper.html\" rel=\"nofollow noopener\" target=\"_blank\">Copper Development Association fatigue data<\/a>. For a Class 6 wire (0.10 mm) at the same radius: \u03b5 = 0.10 \/ (2 \u00d7 131) = 0.038% \u2014 approximately 38% lower strain, which translates to a dramatically longer fatigue life per Coffin-Manson low-cycle fatigue theory.<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u57fa\u672c\u539f\u7406\u662f\u66f4\u7d30\u7684\u9285\u7d72\u5728\u5f4e\u66f2\u6642\u8868\u9762\u61c9\u8b8a\u66f4\u4f4e\u3002\u7b2c 5 \u985e\u9285\u7d72\uff080.16 mm\uff09\u7684\u5f4e\u66f2\u61c9\u8b8a\u70ba 0.061%\uff0c\u800c\u7b2c 6 \u985e\u9285\u7d72\uff080.10 mm\uff09\u7684\u5f4e\u66f2\u61c9\u8b8a\u70ba 0.038%\u2014\u2014\u4f4e\u7d04 38%\uff0c\u9019\u6839\u64da Coffin-Manson \u4f4e\u5faa\u74b0\u75b2\u52de\u7406\u8ad6\u8f49\u5316\u70ba\u986f\u8457\u66f4\u9577\u7684\u75b2\u52de\u58fd\u547d\u3002<\/p>\n\n <p>FeiChun offers the 24G2.5 in both Class 5 (standard) and Class 6 (premium) stranding. The recommendation depends on the duty cycle: for RTG cranes operating at moderate travel speeds (\u226480 m\/min) with fewer than 20,000 full-travel cycles over the cable’s planned service life, Class 5 provides an optimal balance of performance and cost. For STS cranes or high-utilisation RTGs operating at 120+ m\/min with a target of 40,000+ cycles, Class 6 is the correct specification \u2014 the 15\u201325% cost premium is trivially justified by the 2\u00d7 improvement in flex life, which effectively halves the annualised cable replacement cost.<\/p>\n\n \n <h2 id=\"s6\">6. Insulation: 3GI3 EPR vs. TPE for Signal Integrity Under Cyclic Flexing<\/h2>\n\n <p><strong>The insulation compound in a multi-core control reeling cable serves a dual function that is not present in power reeling cables: it must provide both electrical isolation between cores (the standard function) and sufficient dielectric consistency to maintain signal integrity for PLC-level digital and analogue signals under the continuous mechanical deformation of reeling duty.<\/strong> Two compound families are used in the 24G2.5 specification: 3GI3 EPR (the same peroxide-cured ethylene-propylene rubber used in power reeling cables) and TPE (thermoplastic elastomer, typically an SEBS-based compound).<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u591a\u82af\u63a7\u5236\u5377\u7e9c\u4e2d\u7684\u7d55\u7de3\u5316\u5408\u7269\u627f\u64d4\u96d9\u91cd\u529f\u80fd\uff1a\u65e2\u8981\u63d0\u4f9b\u82af\u7dda\u9593\u7684\u96fb\u6c23\u9694\u96e2\uff0c\u53c8\u8981\u4fdd\u6301\u8db3\u5920\u7684\u4ecb\u96fb\u4e00\u81f4\u6027\u4ee5\u7dad\u8b77 PLC \u7d1a\u6578\u4f4d\u548c\u985e\u6bd4\u4fe1\u865f\u5728\u6301\u7e8c\u6a5f\u68b0\u8b8a\u5f62\u4e0b\u7684\u4fe1\u865f\u5b8c\u6574\u6027\u300224G2.5 \u898f\u683c\u4f7f\u7528\u5169\u7a2e\u5316\u5408\u7269\u7cfb\u5217\uff1a3GI3 EPR \u548c TPE\uff08\u71b1\u5851\u6027\u5f48\u6027\u9ad4\uff09\u3002<\/p>\n\n <div class=\"tw\">\n <caption>Table 3 \u2014 3GI3 EPR vs. TPE Insulation for Control Reeling Applications<\/caption>\n <table>\n <thead>\n <tr>\n <th>Parameter<\/th>\n <th>3GI3 EPR<\/th>\n <th>TPE (SEBS-based)<\/th>\n <th>Significance for Signal Integrity<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>Dielectric constant (\u03b5r)<\/td>\n <td>2.8\u20133.2<\/td>\n <td>2.3\u20132.6<\/td>\n <td>Lower \u03b5r = lower mutual capacitance = less crosstalk<\/td>\n <\/tr>\n <tr>\n <td>Mutual capacitance (typical)<\/td>\n <td>~120\u2013150 nF\/km (core-to-core)<\/td>\n <td>~80\u2013110 nF\/km (core-to-core)<\/td>\n <td>TPE superior for signal-dense applications<\/td>\n <\/tr>\n <tr>\n <td>Insulation resistance (M\u03a9\u00b7km)<\/td>\n <td>\u2265 100<\/td>\n <td>\u2265 200<\/td>\n <td>TPE provides higher IR margin<\/td>\n <\/tr>\n <tr>\n <td>Temperature range<\/td>\n <td>-25\u00b0C to +90\u00b0C<\/td>\n <td>-30\u00b0C to +80\u00b0C<\/td>\n <td>EPR superior at high temps; TPE superior at low temps<\/td>\n <\/tr>\n <tr>\n <td>Oil resistance<\/td>\n <td>Good (3GI3 highest EPR grade)<\/td>\n <td>Moderate<\/td>\n <td>EPR preferred for oily environments (engine rooms)<\/td>\n <\/tr>\n <tr>\n <td>Flex-life impact<\/td>\n <td>Baseline<\/td>\n <td>+10\u201320% improvement<\/td>\n <td>TPE softer (Shore A 60\u201370 vs. 65\u201375), less micro-cracking<\/td>\n <\/tr>\n <tr>\n <td>Fire behaviour<\/td>\n <td>Self-extinguishing per IEC 60332-1<\/td>\n <td>Self-extinguishing per IEC 60332-1<\/td>\n <td>Both acceptable for port crane use<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>For applications where the 24G2.5 cable carries a mix of 24 VDC power circuits and high-speed PLC digital signals (e.g., PROFINET or EtherNet\/IP over dedicated core pairs), the lower mutual capacitance of TPE insulation provides a measurable advantage in signal integrity \u2014 particularly over cable lengths exceeding 100 metres, where core-to-core capacitance begins to attenuate high-frequency signal edges. For applications where the cable operates in hot, oily environments (e.g., near crane drive machinery) or where the temperature routinely exceeds 70\u00b0C, 3GI3 EPR is the correct choice because of its superior thermal stability and oil resistance. FeiChun manufactures the 24G2.5 in both insulation options and can advise on the optimal selection based on the specific crane control architecture and signal types. Contact <a href=\"mailto:TECH@FEICHUNCABLES.COM\">TECH@FEICHUNCABLES.COM<\/a> with your control system schematic for a recommendation.<\/p>\n\n \n <h2 id=\"s7\">7. The Anti-Torsion Braid in Multi-Core Cables: Why 24 Cores Need It More Than 4<\/h2>\n\n <p><strong>The anti-torsion braid \u2014 a woven layer of high-tensile synthetic fibres (Kevlar or high-tenacity polyester) vulcanised between the inner and outer sheaths \u2014 is important in every reeling cable, but it is absolutely indispensable in multi-core configurations like the 24G2.5.<\/strong> The reason relates directly to the differential core travel discussed in Section 3: when 24 cores are subjected to differential tensile stress, the resulting internal forces do not merely cause the individual cores to shift position \u2014 they generate a net torsional moment on the cable assembly as a whole, because the outer-layer cores (which are under greater tension) create an asymmetric force distribution that attempts to rotate the cable around its longitudinal axis.<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u6297\u626d\u8f49\u7de8\u7e54\u5c64\u5728\u6bcf\u7a2e\u5377\u7e9c\u4e2d\u90fd\u5f88\u91cd\u8981\uff0c\u4f46\u5728 24G2.5 \u7b49\u591a\u82af\u914d\u7f6e\u4e2d\u7d55\u5c0d\u4e0d\u53ef\u6216\u7f3a\u3002\u539f\u56e0\u76f4\u63a5\u8207\u7b2c 3 \u7bc0\u8a0e\u8ad6\u7684\u5dee\u7570\u6027\u82af\u7dda\u884c\u7a0b\u6709\u95dc\uff1a\u7576 24 \u6839\u82af\u7dda\u53d7\u5230\u5dee\u7570\u6027\u62c9\u4f38\u61c9\u529b\u6642\uff0c\u7522\u751f\u7684\u5167\u529b\u4e0d\u50c5\u5c0e\u81f4\u500b\u5225\u82af\u7dda\u79fb\u4f4d\u2014\u2014\u5b83\u5011\u5728\u96fb\u7e9c\u7d44\u4ef6\u6574\u9ad4\u4e0a\u7522\u751f\u6de8\u626d\u8f49\u529b\u77e9\u3002<\/p>\n\n <p>In a 4-core power cable, the torsional moment generated by differential core travel is relatively small because there is only one layer of cores, all at approximately the same radial distance from the cable centre. The moment arm is minimal, and the cable’s inherent torsional stiffness (provided by the rubber matrix alone) is usually sufficient to resist it. In a 24-core cable with three concentric core layers, the torsional moment is approximately proportional to the number of cores in the outermost layer multiplied by the radial distance of that layer from the cable centre \u2014 a product that is roughly 3\u20135\u00d7 greater than in a 4-core cable. Without a dedicated torsion-resistant structure (the braid), this moment will rotate the cable during each reeling cycle, progressively winding torsional strain into the cable. After 500\u20132,000 cycles (depending on the drum tension), the accumulated torsional strain exceeds the limit, and the cable corkscrews.<\/p>\n\n <p>FeiChun’s anti-torsion braid for the 24G2.5 uses the same vulcanised-braid technology as its power reeling cables: a high-tenacity polyester braid (tensile strength ~1,100 MPa) or Kevlar\/Twaron braid (tensile strength ~3,600 MPa) woven at 54.7\u00b0 neutral braid angle per the principles described in <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0263822306001589\" rel=\"nofollow noopener\" target=\"_blank\">Composites Science and Technology, Vol. 67, 2007<\/a>. The braid is applied onto the freshly extruded (uncured) inner sheath, and the outer sheath is immediately extruded over it, so that the vulcanisation process chemically bonds the braid fibres to both rubber surfaces. This creates a torsionally rigid but longitudinally flexible cylindrical cage that locks the 24-core assembly in position while still allowing the cable to flex freely around the drum radius.<\/p>\n\n <div class=\"note amber\">\n <div class=\"nt\">Critical Procurement Warning \u95dc\u9375\u63a1\u8cfc\u8b66\u544a<\/div>\n <p>Many generic “24G2.5 flexible cable” products available on the market do not include an anti-torsion braid. These cables are designed for festoon or cable-chain applications where the cable hangs in a catenary and is not subjected to drum winding forces. Installing a non-braided cable on a motorised reeling drum will result in corkscrewing within 2\u20138 weeks, causing intermittent control signal failures that are extremely difficult to diagnose. Always verify the presence of a vulcanised anti-torsion braid before accepting any 24G2.5 cable for reeling duty. \u5e02\u5834\u4e0a\u8a31\u591a\u901a\u7528\u300c24G2.5 \u8edf\u96fb\u7e9c\u300d\u4e0d\u542b\u6297\u626d\u8f49\u7de8\u7e54\u5c64\u3002\u5c07\u7121\u7de8\u7e54\u5c64\u96fb\u7e9c\u5b89\u88dd\u5728\u96fb\u52d5\u5377\u7e9c\u5668\u4e0a\u5c07\u5728 2\u20138 \u9031\u5167\u5c0e\u81f4\u87ba\u65cb\u8b8a\u5f62\u3002\u52d9\u5fc5\u5728\u63a5\u53d7\u4efb\u4f55\u7528\u65bc\u5377\u7e9c\u7684 24G2.5 \u96fb\u7e9c\u4e4b\u524d\u9a57\u8b49\u662f\u5426\u5b58\u5728\u786b\u5316\u6297\u626d\u8f49\u7de8\u7e54\u5c64\u3002<\/p>\n <\/div>\n\n \n <h2 id=\"s8\">8. Outer Sheath Decision: 5GM5 Neoprene vs. Polyurethane (PUR)<\/h2>\n\n <p><strong>The outer sheath is the cable’s first and only line of defence against the external environment, and the choice between 5GM5 neoprene (polychloroprene, CR) and polyurethane (PUR) is not interchangeable \u2014 it must be matched to the specific environmental and mechanical conditions at the cable’s installation site.<\/strong><\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u5916\u8b77\u5957\u662f\u96fb\u7e9c\u62b5\u79a6\u5916\u90e8\u74b0\u5883\u7684\u7b2c\u4e00\u9053\u4e5f\u662f\u552f\u4e00\u7684\u9632\u7dda\uff0c5GM5 \u6c2f\u4e01\u6a61\u81a0\u548c\u805a\u6c28\u916f\uff08PUR\uff09\u4e4b\u9593\u7684\u9078\u64c7\u4e0d\u53ef\u4e92\u63db\u2014\u2014\u5fc5\u9808\u8207\u96fb\u7e9c\u5b89\u88dd\u5730\u9ede\u7684\u5177\u9ad4\u74b0\u5883\u548c\u6a5f\u68b0\u689d\u4ef6\u5339\u914d\u3002<\/p>\n\n <div class=\"tw\">\n <caption>Table 4 \u2014 5GM5 Neoprene vs. PUR Sheath: Decision Matrix for Port Crane Applications<\/caption>\n <table>\n <thead>\n <tr>\n <th>Environmental \/ Mechanical Factor<\/th>\n <th>5GM5 Neoprene (CR)<\/th>\n <th>PUR<\/th>\n <th>Recommendation<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>Saltwater \/ marine atmosphere<\/td>\n <td class=\"g\">Excellent (inherent hydrophobicity)<\/td>\n <td>Good (requires UV-stabilised grade)<\/td>\n <td>Neoprene for coastal ports<\/td>\n <\/tr>\n <tr>\n <td>Ozone resistance (coastal UV + corona)<\/td>\n <td class=\"g\">Excellent (zero cracking at 50 ppm \/ 100 h)<\/td>\n <td>Good<\/td>\n <td>Neoprene for outdoor tropical\/subtropical<\/td>\n <\/tr>\n <tr>\n <td>UV radiation resistance<\/td>\n <td class=\"g\">Excellent (carbon black + CR chemistry)<\/td>\n <td>Moderate (requires additive package)<\/td>\n <td>Neoprene for unshielded outdoor runs<\/td>\n <\/tr>\n <tr>\n <td>Abrasion resistance (metal grating, guide rollers)<\/td>\n <td>Good (DIN loss ~120 mm\u00b3)<\/td>\n <td class=\"g\">Excellent (DIN loss ~40\u201360 mm\u00b3)<\/td>\n <td>PUR for heavy metal-contact abrasion<\/td>\n <\/tr>\n <tr>\n <td>Cut and tear resistance<\/td>\n <td>Good<\/td>\n <td class=\"g\">Excellent (2\u20133\u00d7 neoprene)<\/td>\n <td>PUR for sharp-edge environments<\/td>\n <\/tr>\n <tr>\n <td>Oil and hydrocarbon resistance<\/td>\n <td class=\"g\">Good (5GM5 highest CR grade)<\/td>\n <td>Moderate (some PUR grades swell)<\/td>\n <td>Neoprene for oily environments<\/td>\n <\/tr>\n <tr>\n <td>Flame retardancy<\/td>\n <td class=\"g\">Inherent (chlorine content ~35%)<\/td>\n <td>Requires additive package<\/td>\n <td>Neoprene for fire-rated requirements<\/td>\n <\/tr>\n <tr>\n <td>Low-temperature flexibility<\/td>\n <td>-25\u00b0C (typical minimum)<\/td>\n <td class=\"g\">-30\u00b0C to -40\u00b0C (depending on grade)<\/td>\n <td>PUR for cold-climate ports<\/td>\n <\/tr>\n <tr>\n <td>Travel speed capability<\/td>\n <td>Up to 120 m\/min<\/td>\n <td class=\"g\">Up to 180 m\/min<\/td>\n <td>PUR for high-speed modern cranes<\/td>\n <\/tr>\n <tr>\n <td>Cable weight<\/td>\n <td>~2.2\u20132.8 kg\/m<\/td>\n <td class=\"g\">~2.0\u20132.5 kg\/m (5\u201315% lighter)<\/td>\n <td>PUR for weight-sensitive drum capacities<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>In practice, the decision follows a simple rule: if the crane operates in a coastal port with significant saltwater, UV, and ozone exposure, and the control cable reel speed is \u2264 120 m\/min, specify the NSHT\u00d6U-J (neoprene) variant. If the crane operates in an inland terminal, a covered facility, or any environment where metal-to-cable abrasion is the dominant wear mechanism, and\/or the reel speed exceeds 120 m\/min, specify the PUR variant. FeiChun manufactures both variants with identical internal construction, so the decision affects only the outer sheath \u2014 the signal performance, flex life (at a given conductor class), and anti-torsion properties are identical between the two.<\/p>\n\n \n <h2 id=\"s9\">9. Core Identification and Numbering per IEC 60227 \/ VDE 0293<\/h2>\n\n <p><strong>Correct core identification is critical for a 24-core control cable because any wiring error during termination can cause a control signal to be connected to the wrong PLC input \u2014 a fault that may not be detected during commissioning and can cause dangerous crane behaviour during operation.<\/strong> The 24G2.5 follows the core identification conventions of <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/1049\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60227<\/a> and VDE 0293-308: 23 cores with black insulation, each individually numbered with white inkjet printing (numbers 1 through 23), plus one green\/yellow earth core (PE). The “G” in “24G2.5” denotes the presence of this protective earth core (Gr\u00fcn-gelb in German).<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u6b63\u78ba\u7684\u82af\u7dda\u6a19\u8b58\u5c0d 24 \u82af\u63a7\u5236\u96fb\u7e9c\u81f3\u95dc\u91cd\u8981\uff0c\u56e0\u70ba\u63a5\u7dda\u7aef\u5b50\u8655\u7684\u4efb\u4f55\u63a5\u7dda\u932f\u8aa4\u90fd\u53ef\u80fd\u5c07\u63a7\u5236\u4fe1\u865f\u9023\u63a5\u5230\u932f\u8aa4\u7684 PLC \u8f38\u5165\u300224G2.5 \u9075\u5faa IEC 60227 \u548c VDE 0293-308 \u7684\u82af\u7dda\u6a19\u8b58\u898f\u7bc4\uff1a23 \u6839\u9ed1\u8272\u7d55\u7de3\u82af\u7dda\uff0c\u6bcf\u6839\u4ee5\u767d\u8272\u5674\u78bc\u6a19\u8a18\u7de8\u865f 1 \u81f3 23\uff0c\u52a0\u4e00\u6839\u7da0\/\u9ec3\u63a5\u5730\u82af\u7dda\uff08PE\uff09\u3002<\/p>\n\n <p>The inkjet numbering must satisfy two requirements under VDE 0293-308: legibility and durability. Legibility means the numbers must be printed at a minimum height of 2.5 mm with a repeat interval of no more than 50 mm along the core length, ensuring that the technician can identify any core at any point along the cable without stripping more than 50 mm of outer sheath. Durability means the printing must survive the mechanical abrasion and chemical exposure of the cable’s service environment \u2014 the numbers must remain legible after 10,000 flex cycles (per the VDE 0250-814 type test) and after immersion in common industrial solvents (IPA, mineral oil) for 24 hours. FeiChun uses a UV-cured inkjet system that bonds the pigment directly to the EPR or TPE insulation surface, achieving adhesion values exceeding 3 N\/mm in the peel test per <a href=\"https:\/\/www.iso.org\/standard\/64400.html\" rel=\"nofollow noopener\" target=\"_blank\">ISO 2409<\/a> cross-cut method \u2014 significantly exceeding the minimum VDE requirement.<\/p>\n\n \n <h2 id=\"s10\">10. Signal Integrity: Capacitance, Crosstalk, and EMI in Dynamic Reeling<\/h2>\n\n <p><strong>A 24G2.5 control cable carrying a mix of PLC digital signals (24 VDC), analogue sensor inputs (4\u201320 mA or 0\u201310 V), and auxiliary power circuits (24 VDC at up to 10 A) must maintain signal integrity under conditions that would compromise most static installation cables: continuous mechanical vibration, periodic compression during multi-layer winding, and electromagnetic interference (EMI) from the adjacent power reeling cable and the crane’s variable-frequency drive (VFD) systems.<\/strong><\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u627f\u8f09 PLC \u6578\u4f4d\u4fe1\u865f\uff0824 VDC\uff09\u3001\u985e\u6bd4\u611f\u6e2c\u5668\u8f38\u5165\uff084\u201320 mA \u6216 0\u201310 V\uff09\u548c\u8f14\u52a9\u96fb\u6e90\u56de\u8def\u7684 24G2.5 \u63a7\u5236\u96fb\u7e9c\uff0c\u5fc5\u9808\u5728\u6301\u7e8c\u6a5f\u68b0\u632f\u52d5\u3001\u591a\u5c64\u7e8f\u7e5e\u6642\u7684\u9031\u671f\u6027\u58d3\u7e2e\uff0c\u4ee5\u53ca\u4f86\u81ea\u76f8\u9130\u52d5\u529b\u5377\u7e9c\u548c\u8d77\u91cd\u6a5f\u8b8a\u983b\u9a45\u52d5\u7cfb\u7d71\u7684\u96fb\u78c1\u5e72\u64fe\u689d\u4ef6\u4e0b\u7dad\u6301\u4fe1\u865f\u5b8c\u6574\u6027\u3002<\/p>\n\n <p>Mutual capacitance \u2014 the capacitance between any two cores within the cable \u2014 is the primary parameter governing crosstalk in multi-core control cables. When a 24 VDC digital signal transitions from 0 V to 24 V on one core, the rate of voltage change (dV\/dt) couples through the mutual capacitance to adjacent cores, inducing a transient voltage pulse. If this induced pulse exceeds the noise margin of the receiving PLC input (typically \u00b15 V for a 24 VDC input per <a href=\"https:\/\/www.iec.ch\/homepage\" rel=\"nofollow noopener\" target=\"_blank\">IEC 61131-2<\/a>), it can be misinterpreted as a signal transition \u2014 causing a phantom sensor reading or a false limit-switch trigger. The induced voltage is proportional to the mutual capacitance and the dV\/dt of the aggressor signal: V_induced = C_mutual \u00d7 dV\/dt \u00d7 Z_victim, where Z_victim is the impedance seen by the victim core.<\/p>\n\n <p>For a 200-metre cable with 3GI3 EPR insulation (C_mutual \u2248 130 nF\/km, so 200 m = 26 nF) and a typical 24 VDC transition time of 1 ms: V_induced = 26 \u00d7 10\u207b\u2079 \u00d7 (24 \/ 0.001) \u00d7 1000 \u2248 0.62 V \u2014 comfortably below the \u00b15 V noise margin. However, for faster signal edges (e.g., PROFINET with transition times of ~10 ns) or longer cable runs, the induced voltage can approach or exceed the noise margin, requiring either TPE insulation (with its 20\u201330% lower capacitance) or the use of dedicated shielded pairs within the cable assembly. FeiChun offers a premium variant of the 24G2.5 with individually shielded pair groups (e.g., 4 shielded pairs + 16 unshielded cores) for terminals using PROFINET or EtherNet\/IP crane control architectures.<\/p>\n\n \n <h2 id=\"s11\">11. Slip-Clutch Tension Calculation for 24G2.5 Configurations<\/h2>\n\n <p><strong>The slip-clutch tension limit for the 24G2.5 is significantly lower than for power reeling cables, because the total copper cross-section is smaller \u2014 and exceeding this limit on a multi-core cable causes a failure mode (individual core fracture) that is far more difficult to diagnose than the obvious sheath damage caused by over-tensioning a power cable.<\/strong><\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>24G2.5 \u7684\u6ed1\u52d5\u96e2\u5408\u5668\u5f35\u529b\u9650\u503c\u986f\u8457\u4f4e\u65bc\u52d5\u529b\u5377\u7e9c\uff0c\u56e0\u70ba\u7e3d\u9285\u622a\u9762\u7a4d\u66f4\u5c0f\u2014\u2014\u4e14\u5728\u591a\u82af\u96fb\u7e9c\u4e0a\u8d85\u904e\u6b64\u9650\u503c\u6240\u5c0e\u81f4\u7684\u5931\u6548\u6a21\u5f0f\uff08\u55ae\u6839\u82af\u7dda\u65b7\u88c2\uff09\u6bd4\u52d5\u529b\u96fb\u7e9c\u904e\u5ea6\u5f35\u529b\u9020\u6210\u7684\u660e\u986f\u8b77\u5957\u640d\u50b7\u66f4\u96e3\u8a3a\u65b7\u3002<\/p>\n\n <div class=\"formula\">\n Total copper cross-section: 24 \u00d7 2.5 mm\u00b2 = 60 mm\u00b2<br>\n F_max = 15 N\/mm\u00b2 \u00d7 60 mm\u00b2 = 900 N (\u2248 91.7 kg)<br>\n Recommended slip-clutch setting (80%): 720 N (\u2248 73.4 kg)\n <\/div>\n\n <p>This is an extremely low tension value \u2014 less than one-quarter of the typical setting for a 4\u00d750 mm\u00b2 power cable on the same crane. The slip-clutch on the control cable reel must be set independently of the power cable reel, and it must be verified with a calibrated load cell during commissioning. A common error is to set the control cable reel’s slip-clutch to the same value as the power cable reel \u2014 this will apply approximately 4\u00d7 the safe tension to the 24G2.5 cable, causing immediate plastic deformation of the copper conductors and progressive core fracture over the following weeks.<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u9019\u662f\u4e00\u500b\u6975\u4f4e\u7684\u5f35\u529b\u503c\u2014\u2014\u4e0d\u5230\u540c\u4e00\u8d77\u91cd\u6a5f\u4e0a\u5178\u578b 4\u00d750 mm\u00b2 \u52d5\u529b\u96fb\u7e9c\u8a2d\u5b9a\u503c\u7684\u56db\u5206\u4e4b\u4e00\u3002\u63a7\u5236\u96fb\u7e9c\u5377\u7b52\u7684\u6ed1\u52d5\u96e2\u5408\u5668\u5fc5\u9808\u7368\u7acb\u65bc\u52d5\u529b\u96fb\u7e9c\u5377\u7b52\u55ae\u7368\u8a2d\u5b9a\u3002\u4e00\u500b\u5e38\u898b\u932f\u8aa4\u662f\u5c07\u63a7\u5236\u96fb\u7e9c\u5377\u7b52\u7684\u96e2\u5408\u5668\u8a2d\u5b9a\u70ba\u8207\u52d5\u529b\u96fb\u7e9c\u5377\u7b52\u76f8\u540c\u7684\u503c\u2014\u2014\u9019\u5c07\u5c0d 24G2.5 \u96fb\u7e9c\u65bd\u52a0\u7d04 4 \u500d\u7684\u5b89\u5168\u5f35\u529b\u3002<\/p>\n\n <p>Cable weight also matters for the 24G2.5. At approximately 2.5 kg\/m (neoprene variant), a 150-metre payout creates a suspended cable weight of approximately 375 kg (3,679 N) \u2014 which exceeds the 900 N conductor tensile limit by more than 4\u00d7. This means that every 24G2.5 control cable reel installation must use a gravity-assisted drum configuration, a dancer-arm tensioner, or a cable-track support system that prevents the cable’s own weight from loading the conductors. This is a fundamentally different engineering constraint than for power cables (where the conductor cross-section is large enough to safely support the cable weight), and it must be explicitly addressed in the crane’s cable management system design.<\/p>\n\n <div class=\"note blue\">\n <div class=\"nt\">Application Engineering Support \u61c9\u7528\u5de5\u7a0b\u652f\u63f4<\/div>\n <p>FeiChun provides complimentary cable-management system analysis for 24G2.5 control reeling installations, including drum configuration (gravity-assisted vs. dancer-arm), tension profile modelling, and guide-roller spacing calculations. Submit your crane model and control cable routing to <a href=\"mailto:TECH@FEICHUNCABLES.COM\">TECH@FEICHUNCABLES.COM<\/a>. \u98db\u7d14\u70ba 24G2.5 \u63a7\u5236\u5377\u7e9c\u5b89\u88dd\u63d0\u4f9b\u514d\u8cbb\u7684\u96fb\u7e9c\u7ba1\u7406\u7cfb\u7d71\u5206\u6790\uff0c\u5305\u62ec\u5377\u7b52\u914d\u7f6e\u3001\u5f35\u529b\u66f2\u7dda\u5efa\u6a21\u548c\u5c0e\u8f2a\u9593\u8ddd\u8a08\u7b97\u3002<\/p>\n <\/div>\n\n \n <h2 id=\"s12\">12. FeiChun NSHT\u00d6U-J 24G2.5: Construction Parity and Drop-In Validation<\/h2>\n\n <p><strong>FeiChun manufactures the NSHT\u00d6U-J 24G2.5 and PUR 24G2.5 control reeling cables as validated drop-in equivalents to the corresponding products from Prysmian (PROTOMONT 24G2.5), TF Kable (TFCrane Control), Lapp (\u00d6LFLEX CRANE 24G2.5), and Nexans (RHEYFIRM 24G2.5).<\/strong> “Drop-in equivalent” means the FeiChun cable can be installed on the same crane drum, with the same guide rollers, cable glands, and terminal blocks, without any mechanical modification.<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u98db\u7d14\u88fd\u9020\u7684 NSHT\u00d6U-J 24G2.5 \u548c PUR 24G2.5 \u63a7\u5236\u5377\u7e9c\uff0c\u662f Prysmian\uff08PROTOMONT 24G2.5\uff09\u3001TF Kable\uff08TFCrane Control\uff09\u3001Lapp\uff08\u00d6LFLEX CRANE 24G2.5\uff09\u548c Nexans\uff08RHEYFIRM 24G2.5\uff09\u5c0d\u61c9\u7522\u54c1\u7684\u7d93\u9a57\u8b49\u76f4\u63a5\u66ff\u63db\u54c1\u3002<\/p>\n\n <div class=\"tw\">\n <caption>Table 5 \u2014 FeiChun 24G2.5 Cross-Reference Matrix<\/caption>\n <table>\n <thead>\n <tr>\n <th>European Brand Product<\/th>\n <th>VDE Designation<\/th>\n <th>FeiChun Equivalent<\/th>\n <th>OD Tolerance<\/th>\n <th>Validated Applications<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>Prysmian PROTOMONT 24G2.5<\/td>\n <td>NSHT\u00d6U-J 0.6\/1 kV<\/td>\n <td class=\"g\">FeiChun NSHT\u00d6U-J 24G2.5<\/td>\n <td>\u00b11.5% OD<\/td>\n <td>STS, RTG, RMG (ZPMC, Liebherr, Konecranes)<\/td>\n <\/tr>\n <tr>\n <td>TF Kable TFCrane Control 24G2.5<\/td>\n <td>NSHT\u00d6U-J 0.6\/1 kV<\/td>\n <td class=\"g\">FeiChun NSHT\u00d6U-J 24G2.5<\/td>\n <td>\u00b11.8% OD<\/td>\n <td>STS, RTG (ZPMC, Kalmar)<\/td>\n <\/tr>\n <tr>\n <td>Lapp \u00d6LFLEX CRANE 24G2.5<\/td>\n <td>NSHT\u00d6U-J 0.6\/1 kV<\/td>\n <td class=\"g\">FeiChun NSHT\u00d6U-J 24G2.5<\/td>\n <td>\u00b11.5% OD<\/td>\n <td>Overhead process cranes, RMG<\/td>\n <\/tr>\n <tr>\n <td>Nexans RHEYFIRM 24G2.5<\/td>\n <td>NSHT\u00d6U-J 0.6\/1 kV<\/td>\n <td class=\"g\">FeiChun NSHT\u00d6U-J 24G2.5<\/td>\n <td>\u00b12.0% OD<\/td>\n <td>STS, ship unloader, stacker reclaimer<\/td>\n <\/tr>\n <tr>\n <td>Any European PUR 24G2.5<\/td>\n <td>VDE 0250-818<\/td>\n <td class=\"g\">FeiChun PUR 24G2.5<\/td>\n <td>\u00b11.5% OD<\/td>\n <td>High-speed RTG, ASC, indoor overhead<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>Construction parity has been validated through a controlled comparison programme conducted by FeiChun’s application engineering team. Each FeiChun 24G2.5 cable was subjected to the full VDE 0250-814 type-test suite (flex test: 25,000 cycles at 7.5\u00d7 OD bending radius; insulation resistance after flex: \u2265 100 M\u03a9\u00b7km; tensile test on conductor: \u2265 15 N\/mm\u00b2 without fracture; ozone resistance: zero cracking at 50 ppm \/ 100 h per VDE 0482-241) and the results were compared against published datasheet values from the European incumbents. In every tested parameter, the FeiChun cable met or exceeded the published specifications. The full type-test report is available upon request \u2014 contact <a href=\"mailto:TECH@FEICHUNCABLES.COM\">TECH@FEICHUNCABLES.COM<\/a>.<\/p>\n\n \n <h2 id=\"s13\">13. Installation, Commissioning, and Diagnostic Protocol for Control Reeling Cables<\/h2>\n\n <p><strong>The installation and commissioning procedure for a 24G2.5 control reeling cable shares the same foundational rules as power reeling cables \u2014 the No-Twist Spooling Rule, minimum bending radius enforcement, and insulation resistance baseline \u2014 but adds several control-cable-specific steps that address the unique failure modes of multi-core signal cables.<\/strong><\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>24G2.5 \u63a7\u5236\u5377\u7e9c\u7684\u5b89\u88dd\u548c\u8abf\u8a66\u7a0b\u5e8f\u8207\u52d5\u529b\u5377\u7e9c\u5171\u4eab\u76f8\u540c\u7684\u57fa\u672c\u898f\u5247\u2014\u2014\u7121\u626d\u8f49\u653e\u7e9c\u898f\u5247\u3001\u6700\u5c0f\u5f4e\u66f2\u534a\u5f91\u57f7\u884c\u548c\u7d55\u7de3\u96fb\u963b\u57fa\u7dda\u2014\u2014\u4f46\u589e\u52a0\u4e86\u5e7e\u500b\u63a7\u5236\u96fb\u7e9c\u7279\u6709\u7684\u6b65\u9a5f\u3002<\/p>\n\n <h3>Step 1: Slip-Clutch Verification (Critical for 24G2.5)<\/h3>\n <p>Before spooling, verify that the control cable reel’s slip-clutch is set independently of the power cable reel. Attach a calibrated load cell to the cable end and run the drum at full operating speed. The measured tension must not exceed 720 N (80% of the 900 N calculated limit). Record the measured value in the commissioning log.<\/p>\n\n <h3>Step 2: Core-by-Core Continuity Test<\/h3>\n <p>After spooling the full cable length onto the crane drum, perform a continuity test on every individual core (1 through 23 + PE) using a low-resistance ohmmeter. The acceptance criterion is \u2264 2.0 \u03a9 end-to-end for each core (calculated as: 7.98 \u03a9\/km \u00d7 cable length in km \u00d7 1.05 temperature correction factor). Any core showing open-circuit or resistance exceeding 120% of the calculated value indicates conductor damage during spooling and requires investigation before proceeding.<\/p>\n\n <h3>Step 3: Insulation Resistance (All 24 Cores)<\/h3>\n <p>Measure IR between every core pair and between each core and the PE conductor using a 500 V DC megohmmeter. With 24 cores, this requires 24 \u00d7 23 \/ 2 = 276 core-pair measurements plus 23 core-to-PE measurements \u2014 a total of 299 measurements. FeiChun recommends using an automated multi-channel IR tester to complete this within a practical timeframe. The minimum acceptable IR is 100 M\u03a9\u00b7km at 20\u00b0C for all measurements.<\/p>\n\n <h3>Step 4: Signal-Loop Verification<\/h3>\n <p>After connecting the cable to the crane’s terminal blocks at both ends, perform a signal-loop test on every active circuit: apply 24 VDC to the source end and verify 24 VDC \u00b15% at the receiving end, with a 1 k\u03a9 dummy load to simulate the PLC input impedance. For analogue circuits, apply a 4\u201320 mA loop test signal and verify that the received current is within \u00b10.5% of the transmitted value. Any deviation indicates a wiring error, a core identification mismatch, or a damaged core that is causing leakage.<\/p>\n\n <h3>Step 5: Dynamic Flex Test (10 Full Cycles)<\/h3>\n <p>Run 10 complete full-travel cycles at normal operating speed while monitoring all PLC I\/O channels in the crane control system. Any intermittent signal dropout, abnormal voltage fluctuation, or fault code during these cycles indicates a mechanical defect in the cable (typically a pre-existing core twist introduced during spooling) and must be investigated before the crane is released for production operation.<\/p>\n\n \n <h2 id=\"s14\">14. Recommended Reading: Related FeiChun Technical Guides<\/h2>\n\n <p>This article is part of the growing FeiChun technical guide library. The following related guides provide deeper coverage of topics referenced in this document:<\/p>\n\n <p class=\"cn\"><strong>\u7e41\u9ad4\u4e2d\u6587\uff1a<\/strong>\u672c\u6587\u662f\u98db\u7d14\u6280\u8853\u6307\u5357\u7cfb\u5217\u7684\u4e00\u90e8\u5206\u3002\u4ee5\u4e0b\u76f8\u95dc\u6307\u5357\u5c0d\u672c\u6587\u5f15\u7528\u7684\u4e3b\u984c\u63d0\u4f9b\u66f4\u6df1\u5165\u7684\u8986\u84cb\u3002<\/p>\n\n <\/div>\n\n \n <div class=\"reading\">\n <h2>Related Technical Guides from FeiChun \u98db\u7d14\u76f8\u95dc\u6280\u8853\u6307\u5357<\/h2>\n <ul class=\"reading-list\">\n <li>\n <a href=\"https:\/\/feichuncables.com\/blog\/tfcrane-equivalent-reeling-cable-sts-rtg\/\">TFCrane Equivalent Reeling Cable for STS and RTG Cranes \u2014 TF Kable to FeiChun Drop-In Replacement Guide<\/a>\n <span class=\"rdesc\">Complete replacement guide for TF Kable TFCrane power reeling cables on STS and RTG cranes. Anti-torsion braid engineering, high-speed reeling at 120\u2013180 m\/min, 5GM5\/3GI3 compound analysis, and FeiChun NSHT\u00d6U \/ NTSCGEW\u00d6U equivalents. Essential companion for terminals replacing both power and control cables. TF Kable TFCrane \u52d5\u529b\u5377\u7e9c\u7684\u5b8c\u6574\u66ff\u63db\u6307\u5357\uff0c\u6db5\u84cb\u6297\u626d\u8f49\u7de8\u7e54\u5c64\u5de5\u7a0b\u53ca\u98db\u7d14\u7b49\u6548\u7522\u54c1\u3002<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/feichuncables.com\/blog\/protomont-crane-cable-replacement-guide\/\">PROTOMONT Crane Cable Replacement: Complete Technical Guide \u2014 Prysmian to FeiChun Cross-Reference<\/a>\n <span class=\"rdesc\">Full cross-reference matrix mapping every Prysmian PROTOMONT variant to its VDE standard and FeiChun equivalent. Covers reeling (NSHT\u00d6U), festoon (NGRDG\u00d6U, NGFLG\u00d6U), vertical hoist (SMK-V with Aramid core), slip-clutch tension calculations, and multi-layer derating tables. Prysmian PROTOMONT \u5168\u578b\u865f\u4ea4\u53c9\u6bd4\u5c0d\u77e9\u9663\u53ca\u98db\u7d14\u7b49\u6548\u7522\u54c1\u3002<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/feichuncables.com\/blog\/ntscgewou-mining-cable-replacement\/\">NTSCGEW\u00d6U 6\/10kV Mining Cable Replacement \u2014 TF Kable to FeiChun for Open-Pit Mining<\/a>\n <span class=\"rdesc\">Deep-dive into medium-voltage trailing cables for bucket-wheel excavators, draglines, and mobile substations. Semi-conductive screen physics, split-earth ground-fault detection, 11-layer construction analysis. \u4e2d\u58d3\u62d6\u66f3\u96fb\u7e9c\u6df1\u5ea6\u5206\u6790\uff0c\u6db5\u84cb\u534a\u5c0e\u9ad4\u5c4f\u853d\u7269\u7406\u5b78\u548c 11 \u5c64\u7d50\u69cb\u3002<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/feichuncables.com\/blog\/5gm5-neoprene-3gi3-epr-material-science\/\">Material Science of Crane Cables: 5GM5 Neoprene and 3GI3 EPR Compound Chemistry<\/a>\n <span class=\"rdesc\">Technical deep-dive into peroxide vs. sulphur cure systems, ozone resistance mechanisms, UV degradation kinetics, and accelerated-ageing test correlations. Explains why compound selection determines cable life. \u904e\u6c27\u5316\u7269\u8207\u786b\u5316\u56fa\u5316\u9ad4\u7cfb\u3001\u8010\u81ed\u6c27\u6a5f\u5236\u53ca\u52a0\u901f\u8001\u5316\u6e2c\u8a66\u7684\u6280\u8853\u6df1\u5ea6\u89e3\u6790\u3002<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/feichuncables.com\/blog\/port-crane-electrification-cable-selection-guide\/\">Port Crane Electrification: Complete Cable Selection Guide for STS, RTG, RMG, and ASC Cranes<\/a>\n <span class=\"rdesc\">Comprehensive reference for selecting cable systems for new-build or retrofit crane electrification. Covers reeling vs. festoon vs. cable chain architectures, voltage-level selection, conductor sizing for multi-layer drums, and whole-life-cost comparison. \u6e2f\u53e3\u8d77\u91cd\u6a5f\u96fb\u6c23\u5316\u96fb\u7e9c\u9078\u578b\u7d9c\u5408\u53c3\u8003\u6307\u5357\u3002<\/span>\n <\/li>\n <\/ul>\n <\/div>\n\n \n <section class=\"refs\">\n <h2>References & Standards \u53c3\u8003\u6587\u737b\u8207\u6a19\u6e96<\/h2>\n <ol class=\"rl\">\n <li>DIN VDE 0250-814:2015, “Flexible cables and cords for use of mobile equipment \u2014 Part 814: Rubber insulated and sheathed cables for reeling duty, rated voltage 0.6\/1 kV,” <a href=\"https:\/\/www.vde-verlag.de\/\" rel=\"nofollow noopener\" target=\"_blank\">VDE Verlag<\/a>.<\/li>\n <li>DIN VDE 0250-818:2016, “Flexible cables and cords for use of mobile equipment \u2014 Part 818: Polyurethane sheathed cables for reeling duty,” <a href=\"https:\/\/www.vde-verlag.de\/\" rel=\"nofollow noopener\" target=\"_blank\">VDE Verlag<\/a>.<\/li>\n <li>IEC 60228:2004, “Conductors of insulated cables \u2014 Classification (Class 5 and Class 6 flexible stranding),” <a href=\"https:\/\/www.iec.ch\/\" rel=\"nofollow noopener\" target=\"_blank\">IEC<\/a>.<\/li>\n <li>IEC 60227:2007, “Polyvinyl chloride insulated cables of rated voltages up to and including 450\/750 V \u2014 Core identification,” <a href=\"https:\/\/www.iec.ch\/\" rel=\"nofollow noopener\" target=\"_blank\">IEC<\/a>.<\/li>\n <li>VDE 0293-308:2003, “Core identification of cables and cords,” <a href=\"https:\/\/www.vde-verlag.de\/\" rel=\"nofollow noopener\" target=\"_blank\">VDE Verlag<\/a>.<\/li>\n <li>IEC 60364-5-52:2009, “Low-voltage electrical installations \u2014 Part 5-52: Selection and erection of electrical equipment \u2014 Wiring systems,” <a href=\"https:\/\/www.iec.ch\/\" rel=\"nofollow noopener\" target=\"_blank\">IEC<\/a>.<\/li>\n <li>IEC 61131-2:2017, “Programmable controllers \u2014 Part 2: Equipment requirements and tests,” <a href=\"https:\/\/www.iec.ch\/\" rel=\"nofollow noopener\" target=\"_blank\">IEC<\/a>.<\/li>\n <li>VDE 0482-241:2014, “Test methods on cables \u2014 Part 241: Determination of ozone resistance,” <a href=\"https:\/\/www.vde-verlag.de\/\" rel=\"nofollow noopener\" target=\"_blank\">VDE Verlag<\/a>.<\/li>\n <li>ISO 2409:2020, “Paints and varnishes \u2014 Cross-cut test,” <a href=\"https:\/\/www.iso.org\/\" rel=\"nofollow noopener\" target=\"_blank\">ISO<\/a>.<\/li>\n <li>Feyrer, K. (2007). <em>Wire Ropes: Tension, Endurance, Reliability.<\/em> Springer-Verlag Berlin Heidelberg. ISBN 978-3-540-20697-2.<\/li>\n <li>Potluri, P. et al. (2007). “Influence of braid angle on the mechanical properties of braided composites,” <em>Composites Science and Technology<\/em>, Vol. 67, pp. 221\u2013230. <a href=\"https:\/\/www.sciencedirect.com\/\" rel=\"nofollow noopener\" target=\"_blank\">Elsevier<\/a>.<\/li>\n <li>Copper Development Association, “Fatigue Properties of Copper and Copper Alloys,” <a href=\"https:\/\/www.copper.org\/\" rel=\"nofollow noopener\" target=\"_blank\">CDA<\/a>.<\/li>\n <li>Anhui Feichun Special Cable Engineering Team, “FeiChun NSHT\u00d6U-J 24G2.5 \/ PUR 24G2.5 Control Reeling Cable: Type-Test Report, Stranding Pitch Validation, and Signal Integrity Performance Data,” Internal Report FC-CC-2025-031, 2025.<\/li>\n <\/ol>\n <\/section>\n\n \n <div class=\"contact\">\n <h3>Contact Anhui Feichun Special Cable Co., Ltd. \u806f\u7e6b\u98db\u7d14\u7279\u7a2e\u96fb\u7e9c<\/h3>\n <div class=\"cg\">\n <div class=\"ci\">\n <span class=\"lb\">Technical & Application Engineering \u6280\u8853\u8207\u61c9\u7528\u5de5\u7a0b<\/span>\n <a href=\"mailto:TECH@FEICHUNCABLES.COM\">TECH@FEICHUNCABLES.COM<\/a>\n <\/div>\n <div class=\"ci\">\n <span class=\"lb\">Services Provided \u63d0\u4f9b\u670d\u52d9<\/span>\n 24G2.5 configuration advisory, EPR vs. TPE insulation selection, neoprene vs. PUR sheath recommendation, slip-clutch tension calculations, drum-compatibility analysis, signal-integrity assessment, on-site installation supervision, commissioning support\n <\/div>\n <\/div>\n <\/div>\n\n <div class=\"ft\">\n \u00a9 2026 Anhui Feichun Special Cable Co., Ltd. All rights reserved. This document is provided for technical reference only. Prysmian, PROTOMONT, Draka, TF Kable, TFCrane, Tele-Fonika, Nexans, RHEYFIRM, Lapp, \u00d6LFLEX, Helukabel, Kevlar, and Twaron are registered trademarks of their respective owners. FeiChun is not affiliated with any of the aforementioned trademark holders. All VDE, IEC, ISO, and DIN standards referenced for technical specification purposes under fair use. \u672c\u6587\u4ef6\u50c5\u4f9b\u6280\u8853\u53c3\u8003\u3002\u6240\u6709\u63d0\u53ca\u4e4b\u5546\u6a19\u5747\u70ba\u5176\u5404\u81ea\u6240\u6709\u8005\u4e4b\u8a3b\u518a\u5546\u6a19\u3002\n <\/div>\n\n<\/article>\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"A definitive engineering specification guide for port electrical engineers, crane automation integrators, and terminal procurement teams who need to specify, source, or replace the 24G2.5 (24\u00d72.5 mm\u00b2) multi-core control reeling cable \u2014 the critical signal backbone of modern container crane automation systems. This document covers every layer of the cable’s construction from the inside out: Class 5 and Class 6 tinned copper stranding options per IEC 60228, the precisely optimised stranding pitch (lay length) that equalises tensile stress across all 24 cores during dynamic bending, 3GI3 EPR versus TPE insulation selection criteria for signal integrity under continuous flexing, the vulcanised anti-torsion braid that prevents the catastrophic “corkscrewing” failure mode unique to high-core-count reeling cables, and the outer sheath decision between 5GM5 polychloroprene (neoprene) for maximum ozone\/UV\/saltwater resistance and polyurethane (PUR) for extreme mechanical abrasion environments. VDE compliance is mapped to both DIN VDE 0250-814 (rubber-sheathed reeling cables) and DIN VDE 0250-818 (PUR-sheathed reeling cables). Core identification follows IEC 60227 conventions: 23 black cores with white printed numbers plus one green\/yellow earth core. Typical applications include PLC I\/O signal transmission, twist-lock sensor feedback, limit switch circuits, anti-collision radar interfaces, load-cell data, and 24 VDC auxiliary power distribution on STS (Ship-to-Shore), RTG (Rubber-Tyred Gantry), RMG (Rail-Mounted Gantry), and heavy industrial overhead cranes.","protected":false},"author":1,"featured_media":9305,"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":[66,8,56],"tags":[49149,49147,49148,6370,49157,48899,49154,49150,45396,49035,8582,5665,49038,10133,861,3826,48907,49164,32764,44303,48755,48793,49011,49162,49049,49159,49163,49153,45397,48901,43546,49151,49152,49155,48905,13085,49158,43552,12736,49160,49161,49046,48956,49156,48915,43821,48896,22892,26500,49048],"class_list":["post-9303","post","type-post","status-publish","format-standard","has-post-thumbnail","category-common-problems-encountered-in-cable-applications","category-cranes-and-material-handling-cable","category-reeling-cable","tag-24-core-reeling-cable","tag-24g2-5-reeling-cable","tag-24x2-5mm2-crane-cable","tag-5gm5-outer-sheath","tag-anti-torsion-control-cable","tag-chinese-premium-crane-cable","tag-continuous-flexing-control-cable","tag-control-reeling-cable","tag-corkscrew-resistant-cable","tag-direct-factory-reeling-cable","tag-dynamic-load-reeling","tag-epr-insulation-3gi3","tag-european-standard-equivalent","tag-feichun-crane-cable","tag-feichun-reeling-cable","tag-feichun-special-cable","tag-flame-retardant-drum-cable","tag-flexible-multi-core-cable-2","tag-heavy-duty-reeling-cable-2","tag-heavy-machinery-wiring","tag-high-speed-winding-cable","tag-high-tensile-strength-reel","tag-import-substitution-crane","tag-industrial-heavy-flex-control","tag-lapp-crane-alternative","tag-mechanical-stress-control-cable","tag-mobile-substation-control","tag-motorized-drum-control-cable","tag-multi-core-crane-cable-2","tag-neoprene-trailing-cable","tag-nexans-rheyfirm-equivalent","tag-nshtou-24g2-5","tag-nshtou-j-24x2-5","tag-numbered-core-reeling-cable","tag-offshore-crane-power","tag-oil-resistant-control-cable","tag-plc-control-crane-cable","tag-port-terminal-electrification","tag-prysmian-protomont-alternative","tag-pur-reeling-cable-24g2-5","tag-rmg-crane-sensor-cable","tag-rtg-crane-wiring","tag-sanction-free-crane-cable","tag-sts-crane-control-cable","tag-thick-rubber-sheath-cable","tag-tinned-copper-class-5","tag-torsion-resistant-reeling","tag-uv-resistant-crane-cable","tag-vde-0250-814-cable","tag-weather-resistant-reeling","cs-entry"],"_links":{"self":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/9303","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=9303"}],"version-history":[{"count":2,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/9303\/revisions"}],"predecessor-version":[{"id":9307,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/9303\/revisions\/9307"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media\/9305"}],"wp:attachment":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media?parent=9303"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/categories?post=9303"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/tags?post=9303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":9303,"date":"2026-03-18T09:56:44","date_gmt":"2026-03-18T01:56:44","guid":{"rendered":"https:\/\/feichuncables.com\/blog\/?p=9303"},"modified":"2026-03-18T09:56:48","modified_gmt":"2026-03-18T01:56:48","slug":"24g2-5-crane-reeling-cable-specification-guide-24x2-5-mm%c2%b2-multi-core-control-cable-for-sts-rtg-rmg-cranes-nshtou-j-pur-vde-0250-814-0250-818-anti-torsion-braid-stran","status":"publish","type":"post","link":"https:\/\/feichuncables.com\/blog\/24g2-5-crane-reeling-cable-specification-guide-24x2-5-mm%c2%b2-multi-core-control-cable-for-sts-rtg-rmg-cranes-nshtou-j-pur-vde-0250-814-0250-818-anti-torsion-braid-stran\/","title":{"rendered":"24G2.5 Crane Reeling Cable Specification Guide: 24\u00d72.5 mm\u00b2 Multi-Core Control Cable for STS, RTG & RMG Cranes \u2014 NSHT\u00d6U-J \/ PUR, VDE 0250-814 \/ 0250-818, Anti-Torsion Braid, Stranding Pitch Engineering, and FeiChun Drop-In Equivalent"},"content":{"rendered":"\n