YXC7V (TSE) – N2XSY (IEC) 18\/30 kV Cable | Feichun Engineering Guide<\/title>\n<meta name=\"description\" content=\"Professional English engineering guide to YXC7V (TSE) \/ N2XSY (IEC) 18\/30 kV single-core copper-conductor XLPE cable with concentric copper wires, copper tape helix and PVC outer sheath.\">\n<meta name=\"keywords\" content=\"YXC7V, N2XSY, 18\/30 kV, single core XLPE cable, copper conductor, copper wire screen, PVC sheath, IEC 60502-2, 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:1550px}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:1500px}.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}.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{color:#f6d98d;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\":\"YXC7V (TSE) - N2XSY (IEC) 18\/30 kV Single-Core XLPE Cable Guide\",\"description\":\"Engineering guide to the YXC7V \/ N2XSY single-core copper-conductor XLPE cable with concentric copper screening, copper tape helix, PVC sheath and the supplied flame-test reference.\",\"author\":{\"@type\":\"Organization\",\"name\":\"Feichun Cable\"},\"publisher\":{\"@type\":\"Organization\",\"name\":\"Feichun Cable\"}}<\/script>\n<\/head>\n<body>\n<main><section class=\"hero\"><div class=\"wrap\"><div class=\"badges\"><span>FEICHUN CABLE<\/span><span>YXC7V (TSE)<\/span><span>N2XSY (IEC)<\/span><span>18\/30 kV<\/span><span>SINGLE CORE<\/span><span>Cu \/ XLPE \/ PVC<\/span><span>CONCENTRIC COPPER SCREEN<\/span><span>IEC 60502-2<\/span><\/div><h1>Feichun YXC7V (TSE) \/ N2XSY (IEC) 18\/30 kV \u2014 Single-Core XLPE Copper Cable<\/h1><p class=\"lead\">A full-English engineering guide to the supplied 18\/30 kV construction: copper conductor, semiconducting conductor screen, XLPE insulation, semiconducting insulation screen, crape tape, concentric copper wires with copper tape and PVC outer sheath. The article separates source values, derived checks and project-release boundaries.<\/p><div class=\"meta\"><span>Uo\/U: 18\/30 kV<\/span><span>1 core<\/span><span>-20 … 90 \u00b0C<\/span><span>250 \u00b0C short-circuit limit<\/span><span>Bending factor: 12 (xD)<\/span><span>IEC 60332-1-2<\/span><span>Product IEC 60502-2<\/span><\/div><\/div><\/section>\n\n<div class=\"toc\"><h3>Contents<\/h3><ol><li>Engineering position<\/li><li>Designation and construction logic<\/li><li>Standards and evidence<\/li><li>Complete source specification<\/li><li>Technical matrix<\/li><li>Derived installation checks<\/li><li>Electrical, thermal and fault design<\/li><li>Layer-by-layer cross-section<\/li><li>Single-core screen system<\/li><li>Fire and PVC boundary<\/li><li>Fixed-route applications<\/li><li>Handling and termination<\/li><li>Selection comparison<\/li><li>Failure-mode controls<\/li><li>Feichun certification scope<\/li><li>Source audit<\/li><\/ol><\/div>\n\n<h2>1. Engineering position<\/h2>\n<div class=\"note\"><b>YXC7V (TSE) \/ N2XSY (IEC) 18\/30 kV is a single-core, XLPE-insulated, copper-conductor medium-voltage cable with a concentric metallic screen formed by copper wires and a copper tape, protected by a PVC outer sheath.<\/b> The supplied application is fixed energy-network service with sudden load changes in residential or industrial areas, underground routes and ducts.<\/div>\n<div class=\"grid\"><div class=\"box\"><b>Why this voltage class matters<\/b><br>At 18\/30 kV, insulation coordination, screen termination, creepage, clearances, earthing and accessory class must be controlled as one system. A lower-voltage accessory or unverified screen kit is not an acceptable substitution.<\/div><div class=\"box\"><b>Single-core design consequence<\/b><br>Phase formation, induced voltage, circulating current, screen bonding, cleating and touch-voltage control are part of the route design. The source does not provide armour or a screen cross-section for this target record.<\/div><div class=\"box\"><b>Fixed-route boundary<\/b><br>The 12 (xD) value is a laying factor. It does not qualify the cable for repeated flexing, reeling, festoon, drag-chain or torsional service.<\/div><div class=\"box\"><b>Data discipline<\/b><br>All eleven matrix rows are reproduced exactly, including the supplied 615 A and 421 A air-flat values. Missing values are not filled from another product family.<\/div><\/div>\n\n<h2>2. Designation and construction logic<\/h2>\n<div class=\"scroll\"><table><thead><tr><th>Designation \/ layer<\/th><th>Engineering reading<\/th><th>Design consequence<\/th><th>Evidence<\/th><\/tr><\/thead><tbody>\n<tr><td class=\"key\">YXC7V (TSE)<\/td><td>National designation retained in the product title.<\/td><td>Use the complete voltage, construction and standard record in procurement; do not rely on the code alone.<\/td><td class=\"source\">Supplied title<\/td><\/tr>\n<tr><td class=\"key\">N2XSY (IEC)<\/td><td>IEC-oriented designation for single-core XLPE copper\/PVC construction.<\/td><td>Coordinate conductor screen, XLPE, insulation screen, metallic screen, sheath and 18\/30 kV accessories.<\/td><td class=\"source\">Supplied title<\/td><\/tr>\n<tr><td class=\"key\">Copper conductor<\/td><td>Phase conductor material is copper.<\/td><td>Use the exact DC resistance and thermal row for voltage-drop and ampacity calculations.<\/td><td class=\"source\">Supplied construction<\/td><\/tr>\n<tr><td class=\"key\">XLPE + semiconducting screens<\/td><td>Extruded dielectric with controlled electric-field interfaces.<\/td><td>Screen continuity, stripping length, cleanliness and stress control are critical at joints and terminations.<\/td><td class=\"source\">Supplied construction<\/td><\/tr>\n<tr><td class=\"key\">Concentric copper wires + copper tape<\/td><td>Metallic screen around the insulation screen.<\/td><td>Bonding, earth-fault duty, induced current and touch voltage need project calculations; no screen area is invented here.<\/td><td class=\"source\">Supplied construction<\/td><\/tr>\n<tr><td class=\"key\">PVC outer sheath<\/td><td>External environmental and mechanical interface.<\/td><td>Do not relabel the product as LSZH or halogen-free without a matching declaration.<\/td><td class=\"source\">Supplied construction<\/td><\/tr>\n<\/tbody><\/table><\/div>\n<div class=\"formula\">Conductor \u2192 semiconducting conductor screen \u2192 XLPE insulation \u2192 semiconducting insulation screen \u2192 crape tape \u2192 concentric copper wires + copper tape \u2192 PVC outer sheath<\/div>\n\n<h2>3. Standards and evidence<\/h2>\n<div class=\"scroll\"><table><thead><tr><th>Reference<\/th><th>Role in the supplied record<\/th><th>Engineering interpretation<\/th><th>Release boundary<\/th><\/tr><\/thead><tbody>\n<tr><td class=\"key\">IEC 60502-2<\/td><td>Product standard.<\/td><td>Use as the product-standard basis for extruded-insulation MV cable design in the applicable voltage range and fixed-installation context.<\/td><td class=\"source\">Confirm project edition and Feichun conformity route.<\/td><\/tr>\n<tr><td class=\"key\">TS IEC 60502<\/td><td>National standard.<\/td><td>Retain the national reference in the schedule where required by the project or market.<\/td><td class=\"source\">Confirm national edition and contract basis.<\/td><\/tr>\n<tr><td class=\"key\">IEC 60332-1-2<\/td><td>Flame-retardant reference.<\/td><td>It is a single-cable vertical flame-propagation test method; it is not a complete grouped-cable fire declaration or CPR class.<\/td><td class=\"source\">Match the exact product test evidence.<\/td><\/tr>\n<tr><td class=\"key\">PVC sheath<\/td><td>Specified outer sheath material.<\/td><td>Assess smoke, corrosive gas, fire stopping, UV, water, chemical and mechanical requirements for the actual route.<\/td><td class=\"source\">No LSZH claim supplied.<\/td><\/tr>\n<\/tbody><\/table><\/div>\n<div class=\"note\"><b>Scope distinction:<\/b> a product standard and a single-cable flame test do not automatically qualify this cable for mining machinery, shipboard service, reeling, festoon or energy-chain motion. Those applications require dedicated mechanical and environmental evidence.<\/div>\n\n<h2>4. Complete source specification<\/h2>\n<div class=\"note\"><b>Every supplied target field is preserved below.<\/b> The source metadata is retained as provided: Generated 8\/4\/26, www.nexans.com.tr, Page 1 \/ 2 and Page 2 \/ 2. No missing target value is imported from another voltage class.<\/div>\n<div class=\"scroll\"><table><thead><tr><th>Specification field<\/th><th>Reference value<\/th><th>Engineering interpretation<\/th><th>Evidence status<\/th><\/tr><\/thead><tbody><tr><td class=\"key\">Product designation<\/td><td class=\"source\">YXC7V (TSE) – N2XSY (IEC) 18\/30 kV<\/td><td>National TSE and IEC-oriented designations are retained separately in the procurement description.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">International product description<\/td><td class=\"source\">N2XSY 18\/30 kV XLPE insulated single core cables with copper conductor<\/td><td>Single-core fixed-installation MV cable architecture for energy-network routes.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Product standard<\/td><td class=\"source\">IEC 60502-2<\/td><td>Use the project-adopted edition and the exact Feichun conformity file for release.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">National standard<\/td><td class=\"source\">National TS IEC 60502<\/td><td>Retain the national reference exactly as supplied; confirm the contract edition where applicable.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Application<\/td><td class=\"source\">These are cables with low dielectric losses used in energy network with sudden load changes. Laid in residental or industrial areas, underground or in ducts.<\/td><td>This wording defines fixed energy-network service; it does not establish reeling, festoon or continuous-flex qualification.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Number of cores<\/td><td class=\"source\">1<\/td><td>Single-core formation requires deliberate screen bonding, phase spacing, cleating and induced-current control.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Conductor<\/td><td class=\"source\">Copper<\/td><td>Copper conductor resistance, voltage drop and thermal capacity remain cross-section and installation dependent.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Conductor flexibility<\/td><td class=\"source\">Not stated in the supplied target record<\/td><td>Do not upgrade the product to Class 2, flexible, reeling or drag-chain status without the controlled Feichun construction record.<\/td><td class=\"source\">Not supplied<\/td><\/tr><tr><td class=\"key\">Conductor screen<\/td><td class=\"source\">Semi-conducting compound (XLPE)<\/td><td>Creates the controlled electric-field transition from conductor to XLPE insulation.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Insulation<\/td><td class=\"source\">XLPE<\/td><td>Primary extruded solid dielectric for the 18\/30 kV system class.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Insulation screen<\/td><td class=\"source\">Semi-conducting compound (XLPE)<\/td><td>Controls the outer XLPE electric-field boundary before the metallic screen.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Semi-conducting tape<\/td><td class=\"source\">Crape tape<\/td><td>Source wording is preserved exactly; stripping and preparation must follow the approved accessory system.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Metallic screen<\/td><td class=\"source\">Concentric \/ Copper wires + copper tape<\/td><td>The metallic screen is an electrical screen and earth-fault path; its section and bonding method are not provided in this target record.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Outer sheath<\/td><td class=\"source\">PVC<\/td><td>PVC is the specified environmental and mechanical outer interface. No LSZH claim is added.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Rated Voltage Uo\/U (Um)<\/td><td class=\"source\">18\/30 kV<\/td><td>Confirm system earthing, switching, withstand, accessories and termination class against the project.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Operating temperature, range<\/td><td class=\"source\">-20 … 90 \u00b0C<\/td><td>Apply with actual ambient, soil, duct, spacing, grouping, screen losses and accessory limits.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Short-circuit max. conductor temperature<\/td><td class=\"source\">250 \u00b0C<\/td><td>Use with conductor I\u00b2t, protection clearing time and complete joint and termination system.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Bending factor when laying<\/td><td class=\"source\">12 (xD)<\/td><td>A laying-radius factor only; it is not a continuous-flex or dynamic-bending qualification.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Max. conductor temperature in service<\/td><td class=\"source\">90 \u00b0C<\/td><td>The thermal design must be corrected for formation, ambient, soil, duct and grouping conditions.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Flame retardant<\/td><td class=\"source\">IEC 60332-1-2<\/td><td>A single-cable flame-propagation test reference; no CPR class is inferred.<\/td><td class=\"source\">Supplied source<\/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 and Page 2 \/ 2<\/td><td>The page labels and source metadata are reproduced exactly as provided.<\/td><td class=\"source\">Supplied source<\/td><\/tr><tr><td class=\"key\">Source disclaimer<\/td><td class=\"source\">All drawings, designs, specifications, plans and particulars of weights, size and dimensions contained in the technical or commercial documentation of Nexans is indicative only and shall not be binding on Nexans or be treated as constituting a representation on the part of Nexans.<\/td><td>Use the controlled Feichun release and project-approved documents for procurement and installation decisions.<\/td><td class=\"source\">Supplied source<\/td><\/tr><\/tbody><\/table><\/div>\n\n<h2>5. Complete technical matrix \u2014 18\/30 kV<\/h2>\n<p>The following matrix preserves every supplied value. Air ratings are stated for 30 \u00b0C in flat and trefoil formations; the buried rating is stated for 20 \u00b0C in trefoil formation. The source does not supply a buried-flat rating, so none is inferred.<\/p>\n<div class=\"scroll\"><table class=\"matrix\"><thead><tr><th>Cross section<br>[mm\u00b2]<\/th><th>Nom. outer diam.<br>[mm]<\/th><th>Approx. weight<br>[kg\/km]<\/th><th>Max. DC Resist. Cond. 20 \u00b0C<br>[Ohm\/km]<\/th><th>Perm. current rating in air 30 \u00b0C \u2014 flat<br>[A]<\/th><th>Current rating in air 30 \u00b0C \u2014 trefoil<br>[A]<\/th><th>Perm. current rating buried 20 \u00b0C \u2014 trefoil<br>[A]<\/th><th>Short circuit conductor 1 s<br>[kA]<\/th><\/tr><\/thead><tbody><tr><td class=\"source\">50<\/td><td class=\"source\">31.0<\/td><td class=\"source\">1300<\/td><td class=\"source\">0.387<\/td><td class=\"source\">286<\/td><td class=\"source\">238<\/td><td class=\"source\">196<\/td><td class=\"source\">7.2<\/td><\/tr><tr><td class=\"source\">70<\/td><td class=\"source\">33.0<\/td><td class=\"source\">1600<\/td><td class=\"source\">0.268<\/td><td class=\"source\">356<\/td><td class=\"source\">296<\/td><td class=\"source\">239<\/td><td class=\"source\">10<\/td><\/tr><tr><td class=\"source\">95<\/td><td class=\"source\">35.0<\/td><td class=\"source\">1900<\/td><td class=\"source\">0.193<\/td><td class=\"source\">434<\/td><td class=\"source\">361<\/td><td class=\"source\">285<\/td><td class=\"source\">13.6<\/td><\/tr><tr><td class=\"source\">120<\/td><td class=\"source\">36.0<\/td><td class=\"source\">2250<\/td><td class=\"source\">0.153<\/td><td class=\"source\">500<\/td><td class=\"source\">417<\/td><td class=\"source\">323<\/td><td class=\"source\">17.2<\/td><\/tr><tr><td class=\"source\">150<\/td><td class=\"source\">38.0<\/td><td class=\"source\">2500<\/td><td class=\"source\">0.124<\/td><td class=\"source\">559<\/td><td class=\"source\">473<\/td><td class=\"source\">361<\/td><td class=\"source\">21.4<\/td><\/tr><tr><td class=\"source\">185<\/td><td class=\"source\">39.0<\/td><td class=\"source\">3000<\/td><td class=\"source\">0.099<\/td><td class=\"source\">637<\/td><td class=\"source\">543<\/td><td class=\"source\">406<\/td><td class=\"source\">26.5<\/td><\/tr><tr><td class=\"source\">240<\/td><td class=\"source\">42.0<\/td><td class=\"source\">3500<\/td><td class=\"source\">0.0754<\/td><td class=\"source\">745<\/td><td class=\"source\">641<\/td><td class=\"source\">469<\/td><td class=\"source\">34.3<\/td><\/tr><tr><td class=\"source\">300<\/td><td class=\"source\">44.0<\/td><td class=\"source\">4250<\/td><td class=\"source\">0.06<\/td><td class=\"source\">846<\/td><td class=\"source\">735<\/td><td class=\"source\">526<\/td><td class=\"source\">42.9<\/td><\/tr><tr><td class=\"source\">400<\/td><td class=\"source\">47.0<\/td><td class=\"source\">5250<\/td><td class=\"source\">0.047<\/td><td class=\"source\">938<\/td><td class=\"source\">845<\/td><td class=\"source\">590<\/td><td class=\"source\">57.2<\/td><\/tr><tr><td class=\"source\">500<\/td><td class=\"source\">51.0<\/td><td class=\"source\">6250<\/td><td class=\"source\">0.037<\/td><td class=\"source\">615<\/td><td class=\"source\">1000<\/td><td class=\"source\">688<\/td><td class=\"source\">71.5<\/td><\/tr><tr><td class=\"source\">630<\/td><td class=\"source\">55.0<\/td><td class=\"source\">7750<\/td><td class=\"source\">0.028<\/td><td class=\"source\">421<\/td><td class=\"source\">1150<\/td><td class=\"source\">774<\/td><td class=\"source\">90.1<\/td><\/tr><\/tbody><\/table><\/div>\n<p class=\"small\">The 500 mm\u00b2 and 630 mm\u00b2 air-flat values of <b>615 A<\/b> and <b>421 A<\/b> are reproduced exactly as supplied. They are unusual relative to adjacent rows and should be confirmed against the controlled product sheet before thermal design or tender release.<\/p>\n<h2>6. Derived installation checks<\/h2>\n<div class=\"scroll\"><table><thead><tr><th>Cross section<\/th><th>Published outer diameter<\/th><th>Source laying factor<\/th><th>Derived minimum laying radius<\/th><th>Mass conversion<\/th><\/tr><\/thead><tbody><tr><td class=\"source\">50 mm\u00b2<\/td><td class=\"source\">31.0 mm<\/td><td class=\"source\">12 \u00d7 D<\/td><td class=\"derived\">372.0 mm<\/td><td class=\"derived\">130.0 kg\/100 m<\/td><\/tr><tr><td class=\"source\">70 mm\u00b2<\/td><td class=\"source\">33.0 mm<\/td><td class=\"source\">12 \u00d7 D<\/td><td class=\"derived\">396.0 mm<\/td><td class=\"derived\">160.0 kg\/100 m<\/td><\/tr><tr><td class=\"source\">95 mm\u00b2<\/td><td class=\"source\">35.0 mm<\/td><td class=\"source\">12 \u00d7 D<\/td><td class=\"derived\">420.0 mm<\/td><td class=\"derived\">190.0 kg\/100 m<\/td><\/tr><tr><td class=\"source\">120 mm\u00b2<\/td><td class=\"source\">36.0 mm<\/td><td class=\"source\">12 \u00d7 D<\/td><td class=\"derived\">432.0 mm<\/td><td class=\"derived\">225.0 kg\/100 m<\/td><\/tr><tr><td class=\"source\">150 mm\u00b2<\/td><td class=\"source\">38.0 mm<\/td><td class=\"source\">12 \u00d7 D<\/td><td class=\"derived\">456.0 mm<\/td><td class=\"derived\">250.0 kg\/100 m<\/td><\/tr><tr><td class=\"source\">185 mm\u00b2<\/td><td class=\"source\">39.0 mm<\/td><td class=\"source\">12 \u00d7 D<\/td><td class=\"derived\">468.0 mm<\/td><td class=\"derived\">300.0 kg\/100 m<\/td><\/tr><tr><td class=\"source\">240 mm\u00b2<\/td><td class=\"source\">42.0 mm<\/td><td class=\"source\">12 \u00d7 D<\/td><td class=\"derived\">504.0 mm<\/td><td class=\"derived\">350.0 kg\/100 m<\/td><\/tr><tr><td class=\"source\">300 mm\u00b2<\/td><td class=\"source\">44.0 mm<\/td><td class=\"source\">12 \u00d7 D<\/td><td class=\"derived\">528.0 mm<\/td><td class=\"derived\">425.0 kg\/100 m<\/td><\/tr><tr><td class=\"source\">400 mm\u00b2<\/td><td class=\"source\">47.0 mm<\/td><td class=\"source\">12 \u00d7 D<\/td><td class=\"derived\">564.0 mm<\/td><td class=\"derived\">525.0 kg\/100 m<\/td><\/tr><tr><td class=\"source\">500 mm\u00b2<\/td><td class=\"source\">51.0 mm<\/td><td class=\"source\">12 \u00d7 D<\/td><td class=\"derived\">612.0 mm<\/td><td class=\"derived\">625.0 kg\/100 m<\/td><\/tr><tr><td class=\"source\">630 mm\u00b2<\/td><td class=\"source\">55.0 mm<\/td><td class=\"source\">12 \u00d7 D<\/td><td class=\"derived\">660.0 mm<\/td><td class=\"derived\">775.0 kg\/100 m<\/td><\/tr><\/tbody><\/table><\/div>\n<p class=\"small\">Derived values are arithmetic screening checks: minimum laying radius = 12 \u00d7 nominal outer diameter; mass per 100 m = approximate kg\/km \u00f7 10. They do not replace the controlled installation method, pulling calculation or accessory manufacturer’s radius.<\/p>\n\n<h2>7. Electrical, thermal and short-circuit design<\/h2>\n<div class=\"grid\"><div class=\"box\"><b>Voltage drop<\/b><br>Use the supplied 20 \u00b0C DC resistance as a source value only. AC resistance, reactance, power factor, route length, formation and screen-bonding losses must be established for the installation.<\/div><div class=\"box\"><b>Thermal rating<\/b><br>Air ratings are stated for 30 \u00b0C; buried trefoil ratings are stated for 20 \u00b0C. Apply corrections for ambient, soil thermal resistivity, ducts, spacing, grouping, sheath losses and accessory limits.<\/div><div class=\"box\"><b>Fault coordination<\/b><br>The source gives a 250 \u00b0C maximum conductor short-circuit temperature and one-second conductor values. Verify protection I\u00b2t with the actual conductor, screen, joint and termination system.<\/div><div class=\"box\"><b>Screen path<\/b><br>No metallic-screen cross-section or screen one-second current value is supplied for this target record. Do not infer a fault-current capability from the presence of copper wires and tape.<\/div><\/div>\n<div class=\"formula\">Voltage-drop screening: \u0394U \u2248 I \u00d7 (R_ac \u00d7 cos \u03c6 + X \u00d7 sin \u03c6) \u00d7 L\n\nThermal acceptance: I_load \u2264 I_z(actual formation, ambient, grouping, soil, duct, screen losses and accessories)\n\nFault coordination: I\u00b2t_protection \u2264 I\u00b2t_conductor \/ screen \/ joint \/ termination system<\/div>\n\n<h2>8. Layer-by-layer cross-section<\/h2><div class=\"svg\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1900 1260\" role=\"img\" aria-label=\"Detailed single-core YXC7V N2XSY 18\/30 kV cross-section showing copper conductor, XLPE, semiconducting screens, concentric copper wires, copper tape helix and PVC outer sheath\">\n<defs>\n<radialGradient id=\"yc7v-pvc\" cx=\"28%\" cy=\"20%\"><stop stop-color=\"#677887\"\/><stop offset=\".62\" stop-color=\"#344553\"\/><stop offset=\"1\" stop-color=\"#111b24\"\/><\/radialGradient>\n<radialGradient id=\"yc7v-xlpe\" cx=\"28%\" cy=\"20%\"><stop stop-color=\"#fff1cb\"\/><stop offset=\".72\" stop-color=\"#d9bd7e\"\/><stop offset=\"1\" stop-color=\"#8d6b3d\"\/><\/radialGradient>\n<radialGradient id=\"yc7v-cu\" cx=\"28%\" cy=\"20%\"><stop stop-color=\"#ffc27d\"\/><stop offset=\".58\" stop-color=\"#c76c2b\"\/><stop offset=\"1\" stop-color=\"#713214\"\/><\/radialGradient>\n<pattern id=\"yc7v-strands\" width=\"20\" height=\"20\" patternUnits=\"userSpaceOnUse\"><circle cx=\"5\" cy=\"5\" r=\"4\" fill=\"#f8c98d\"\/><circle cx=\"15\" cy=\"5\" r=\"4\" fill=\"#ae5220\"\/><circle cx=\"10\" cy=\"15\" r=\"4\" fill=\"#d98237\"\/><\/pattern>\n<pattern id=\"yc7v-screen\" width=\"22\" height=\"22\" patternUnits=\"userSpaceOnUse\"><circle cx=\"5\" cy=\"5\" r=\"3.5\" fill=\"#e8bd55\"\/><circle cx=\"16\" cy=\"15\" r=\"3.5\" fill=\"#936321\"\/><path d=\"M-5 18 L18 -5 M4 27 L27 4\" stroke=\"#e7c16a\" stroke-width=\"3\"\/><\/pattern>\n<marker id=\"yc7v-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=\"1260\" fill=\"#06131b\"\/>\n<text x=\"60\" y=\"64\" fill=\"#55dff7\" font-family=\"Arial\" font-size=\"36\" font-weight=\"700\">YXC7V (TSE) \/ N2XSY (IEC) 18\/30 kV \u2014 single-core construction<\/text>\n<text x=\"60\" y=\"104\" fill=\"#adc4ce\" font-family=\"Arial\" font-size=\"18\">Copper conductor \u00b7 XLPE electric insulation \u00b7 semiconducting screens \u00b7 concentric copper wires + copper tape helix \u00b7 PVC outer sheath.<\/text>\n<text x=\"60\" y=\"138\" fill=\"#ffaaa5\" font-family=\"Arial\" font-size=\"16\">Conceptual engineering reconstruction, not a manufacturing drawing. Layer thicknesses and screen geometry are not shown to scale.<\/text>\n<g transform=\"translate(650 720)\">\n <circle r=\"430\" fill=\"url(#yc7v-pvc)\" stroke=\"#9daab3\" stroke-width=\"16\"\/>\n <circle r=\"378\" fill=\"url(#yc7v-screen)\" stroke=\"#f0cb73\" stroke-width=\"12\"\/>\n <circle r=\"329\" fill=\"#304e5a\" stroke=\"#9fd2d9\" stroke-width=\"8\" stroke-dasharray=\"10 12\"\/>\n <circle r=\"275\" fill=\"url(#yc7v-xlpe)\" stroke=\"#ffe8a5\" stroke-width=\"11\"\/>\n <circle r=\"147\" fill=\"#3a5661\" stroke=\"#92bdc6\" stroke-width=\"7\" stroke-dasharray=\"9 11\"\/>\n <circle r=\"111\" fill=\"url(#yc7v-cu)\" stroke=\"#f6c17f\" stroke-width=\"9\"\/>\n <circle r=\"81\" fill=\"url(#yc7v-strands)\" stroke=\"#ffe4b4\" stroke-width=\"5\"\/>\n<\/g>\n<g font-family=\"Arial\" fill=\"#eaf6fa\">\n <line x1=\"1040\" y1=\"365\" x2=\"1395\" y2=\"190\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#yc7v-arrow)\"\/>\n <text x=\"1420\" y=\"190\" font-size=\"24\" font-weight=\"700\" fill=\"#c8d6dc\">1. PVC outer sheath<\/text><text x=\"1420\" y=\"223\" font-size=\"18\">Environmental and mechanical interface; source material: PVC.<\/text>\n <line x1=\"1010\" y1=\"480\" x2=\"1395\" y2=\"355\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#yc7v-arrow)\"\/>\n <text x=\"1420\" y=\"355\" font-size=\"24\" font-weight=\"700\" fill=\"#e8c37b\">2. Concentric metallic screen<\/text><text x=\"1420\" y=\"388\" font-size=\"18\">Copper wires with a copper tape helix; bonding and fault duty are design items.<\/text>\n <line x1=\"980\" y1=\"590\" x2=\"1395\" y2=\"520\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#yc7v-arrow)\"\/>\n <text x=\"1420\" y=\"520\" font-size=\"24\" font-weight=\"700\" fill=\"#93d9e1\">3. Outer semiconducting screen<\/text><text x=\"1420\" y=\"553\" font-size=\"18\">Controls the XLPE-to-metallic-screen electric-field boundary.<\/text>\n <line x1=\"420\" y1=\"505\" x2=\"72\" y2=\"315\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#yc7v-arrow)\"\/>\n <text x=\"62\" y=\"250\" font-size=\"24\" font-weight=\"700\" fill=\"#f1d38c\">4. Crape-paper semiconducting tape<\/text><text x=\"62\" y=\"283\" font-size=\"18\">Source wording preserved; confirm stripping and preparation method.<\/text>\n <line x1=\"398\" y1=\"635\" x2=\"72\" y2=\"610\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#yc7v-arrow)\"\/>\n <text x=\"62\" y=\"545\" font-size=\"24\" font-weight=\"700\" fill=\"#ffe8a5\">5. XLPE insulation<\/text><text x=\"62\" y=\"578\" font-size=\"18\">Solid extruded dielectric around the screened copper conductor.<\/text>\n <line x1=\"420\" y1=\"800\" x2=\"72\" y2=\"915\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#yc7v-arrow)\"\/>\n <text x=\"62\" y=\"850\" font-size=\"24\" font-weight=\"700\" fill=\"#9fcbd1\">6. Inner semiconducting screen<\/text><text x=\"62\" y=\"883\" font-size=\"18\">Smooths the conductor-to-insulation electric-field transition.<\/text>\n <line x1=\"530\" y1=\"910\" x2=\"72\" y2=\"1120\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#yc7v-arrow)\"\/>\n <text x=\"62\" y=\"1055\" font-size=\"24\" font-weight=\"700\" fill=\"#f0ad6b\">7. Copper conductor<\/text><text x=\"62\" y=\"1088\" font-size=\"18\">Exact conductor flexibility is not stated in the supplied target record.<\/text>\n <rect x=\"1080\" y=\"875\" width=\"700\" height=\"135\" rx=\"12\" fill=\"#081b24\" stroke=\"#315b6f\" stroke-width=\"2\"\/><text x=\"1110\" y=\"915\" font-size=\"19\" fill=\"#55dff7\">Engineering note:<\/text><text x=\"1110\" y=\"947\" font-size=\"18\">The supplied construction lists no steel armour layer. The concentric copper screen<\/text><text x=\"1110\" y=\"978\" font-size=\"18\">must be designed for continuity, bonding, touch voltage and fault duty.<\/text>\n <text x=\"1080\" y=\"1165\" font-size=\"20\" font-weight=\"700\" fill=\"#ffaaa5\">Not to scale \u00b7 no unprovided dimensions are inferred.<\/text>\n<\/g><\/svg><\/div><p>The SVG is a conceptual engineering reconstruction of the supplied layer sequence. It is not a manufacturing drawing and does not add unprovided dimensions, armour, LSZH compounds or screen sections.<\/p>\n\n<h2>9. Single-core electrical and screen system<\/h2><div class=\"svg\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1900 960\" role=\"img\" aria-label=\"Single-core YXC7V N2XSY electrical system showing conductor, copper screen, bonding and fault-path controls\">\n<defs><marker id=\"yc7v-elec-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=\"yc7v-cable\" x1=\"0\" x2=\"1\"><stop stop-color=\"#5c7480\"\/><stop offset=\"1\" stop-color=\"#17252c\"\/><\/linearGradient><\/defs>\n<rect width=\"1900\" height=\"960\" fill=\"#06131b\"\/>\n<text x=\"60\" y=\"66\" fill=\"#55dff7\" font-family=\"Arial\" font-size=\"36\" font-weight=\"700\">Single-core MV system \u2014 screen bonding and fault-path review<\/text>\n<text x=\"60\" y=\"105\" fill=\"#adc4ce\" font-family=\"Arial\" font-size=\"18\">A single-core cable concentrates the design on phase-to-earth electric field, concentric copper-screen continuity, bonding arrangement and installation formation.<\/text>\n<g font-family=\"Arial\" fill=\"#eaf6fa\">\n <rect x=\"70\" y=\"205\" width=\"475\" height=\"555\" rx=\"16\" fill=\"#0b202b\" stroke=\"#55dff7\" stroke-width=\"4\"\/><text x=\"130\" y=\"270\" font-size=\"26\" font-weight=\"700\" fill=\"#55dff7\">Cable cross-section<\/text>\n <circle cx=\"305\" cy=\"485\" r=\"170\" fill=\"#405762\" stroke=\"#dcebf0\" stroke-width=\"12\"\/><circle cx=\"305\" cy=\"485\" r=\"113\" fill=\"#dfbf7c\" stroke=\"#ffe8a5\" stroke-width=\"9\"\/><circle cx=\"305\" cy=\"485\" r=\"56\" fill=\"#be682b\" stroke=\"#f6c17f\" stroke-width=\"8\"\/><text x=\"285\" y=\"493\" font-size=\"20\" font-weight=\"700\">Cu<\/text>\n <text x=\"152\" y=\"710\" font-size=\"19\">XLPE + semicon screens<\/text><text x=\"152\" y=\"742\" font-size=\"19\">copper wires + tape helix<\/text>\n <path d=\"M545 485 H700\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#yc7v-elec-arrow)\"\/>\n <rect x=\"700\" y=\"205\" width=\"530\" height=\"555\" rx=\"16\" fill=\"#0b202b\" stroke=\"#e8c37b\" stroke-width=\"4\"\/><text x=\"770\" y=\"270\" font-size=\"26\" font-weight=\"700\" fill=\"#e8c37b\">Electrical interfaces<\/text>\n <rect x=\"790\" y=\"345\" width=\"350\" height=\"62\" rx=\"8\" fill=\"#765824\" stroke=\"#f0cc73\" stroke-width=\"4\"\/><text x=\"875\" y=\"384\" font-size=\"19\" font-weight=\"700\">Copper metallic screen<\/text>\n <rect x=\"790\" y=\"460\" width=\"350\" height=\"62\" rx=\"8\" fill=\"#405762\" stroke=\"#9fcbd1\" stroke-width=\"4\"\/><text x=\"895\" y=\"499\" font-size=\"19\" font-weight=\"700\">XLPE \/ semicon system<\/text>\n <rect x=\"790\" y=\"575\" width=\"350\" height=\"62\" rx=\"8\" fill=\"#263941\" stroke=\"#dce5e8\" stroke-width=\"5\"\/><text x=\"875\" y=\"614\" font-size=\"19\" font-weight=\"700\">PVC outer sheath<\/text>\n <path d=\"M1230 485 H1380\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#yc7v-elec-arrow)\"\/>\n <rect x=\"1380\" y=\"205\" width=\"440\" height=\"555\" rx=\"16\" fill=\"#0b202b\" stroke=\"#62df9c\" stroke-width=\"4\"\/><text x=\"1440\" y=\"270\" font-size=\"26\" font-weight=\"700\" fill=\"#62df9c\">Release gates<\/text><text x=\"1440\" y=\"345\" font-size=\"19\">single-core formation<\/text><text x=\"1440\" y=\"390\" font-size=\"19\">screen continuity<\/text><text x=\"1440\" y=\"435\" font-size=\"19\">bonding arrangement<\/text><text x=\"1440\" y=\"480\" font-size=\"19\">touch-voltage control<\/text><text x=\"1440\" y=\"525\" font-size=\"19\">earth-fault I\u00b2t<\/text><text x=\"1440\" y=\"570\" font-size=\"19\">termination compatibility<\/text><text x=\"1440\" y=\"615\" font-size=\"19\">route thermal correction<\/text><rect x=\"1430\" y=\"665\" width=\"330\" height=\"58\" rx=\"10\" fill=\"#081b24\" stroke=\"#ff777f\" stroke-width=\"2\"\/><text x=\"1453\" y=\"701\" font-size=\"16\" fill=\"#ffaaa5\">Do not treat the screen as armour.<\/text>\n <rect x=\"80\" y=\"845\" width=\"1740\" height=\"70\" rx=\"10\" fill=\"#081b24\" stroke=\"#315b6f\" stroke-width=\"2\"\/><text x=\"110\" y=\"888\" font-size=\"18\" fill=\"#ffaaa5\">A published screen section is not a complete fault-current guarantee: verify the bonding method, clearing time, parallel paths, joints, terminations and local earthing design.<\/text>\n<\/g><\/svg><\/div><div class=\"grid\"><div class=\"box\"><b>Electric-field continuity<\/b><br>Semiconducting screens must remain clean, concentric and continuous through joints and terminations to avoid local field concentration.<\/div><div class=\"box\"><b>Screen bonding<\/b><br>Choose bonding from system voltage, route length, induced voltage, circulating-current limits, earth-fault duty and local earthing rules.<\/div><div class=\"box\"><b>Mechanical protection<\/b><br>The supplied construction lists no steel armour. Use rollers, cleats, ducts, supports and entry protection that prevent PVC and screen damage.<\/div><div class=\"box\"><b>Accessory interface<\/b><br>Screen stripping, insulation diameter, sheath diameter, stress-control components and phase termination must match the ordered 18\/30 kV cable size.<\/div><\/div>\n\n<h2>10. Fire and PVC performance boundary<\/h2><div class=\"grid\"><div class=\"box\"><b>IEC 60332-1-2<\/b><br>The listed reference concerns single-cable vertical flame propagation. It must not be presented as a grouped-cable fire class or as proof of low smoke and halogen-free performance.<\/div><div class=\"box\"><b>PVC implications<\/b><br>Confirm smoke, corrosive gas, fire stopping, penetrations, ventilation, UV, chemical exposure and local construction requirements for the route.<\/div><div class=\"box\"><b>No unprovided class<\/b><br>The target source does not state any CPR fire subclass or low-smoke\/halogen-free classification. None is added to this article.<\/div><div class=\"box\"><b>Certification boundary<\/b><br>Certification is configuration-specific. The exact Feichun product dossier must control the declared test result, market mark and ordered construction.<\/div><\/div>\n<div class=\"warn\"><b>Procurement rule:<\/b> do not relabel this PVC construction as LSZH, halogen-free, Cca, B2ca or fire-resistant without a matching current product declaration and test report.<\/div>\n\n<h2>11. Fixed-route applications<\/h2><div class=\"svg\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1900 1000\" role=\"img\" aria-label=\"Single-core YXC7V N2XSY fixed-route application from MV substation through duct or underground route to industrial load\">\n<defs><linearGradient id=\"yc7v-sky\" x1=\"0\" x2=\"0\" y1=\"0\" y2=\"1\"><stop stop-color=\"#0b3347\"\/><stop offset=\"1\" stop-color=\"#06131b\"\/><\/linearGradient><linearGradient id=\"yc7v-ground\" x1=\"0\" x2=\"0\" y1=\"0\" y2=\"1\"><stop stop-color=\"#304e55\"\/><stop offset=\"1\" stop-color=\"#0a1b24\"\/><\/linearGradient><marker id=\"yc7v-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(#yc7v-sky)\"\/><rect y=\"650\" width=\"1900\" height=\"350\" fill=\"url(#yc7v-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\">YXC7V \/ N2XSY 18\/30 kV \u2014 fixed-route application architecture<\/text><text x=\"60\" y=\"106\" fill=\"#adc4ce\" font-family=\"Arial\" font-size=\"18\">Single-core copper \/ XLPE \/ copper-screen \/ PVC cable for residential, industrial, underground and duct installations.<\/text>\n<g font-family=\"Arial\" fill=\"#eaf6fa\">\n <rect x=\"70\" y=\"220\" width=\"280\" height=\"260\" rx=\"15\" fill=\"#0b202b\" stroke=\"#55dff7\" stroke-width=\"4\"\/><path d=\"M125 395 V295 H295 V395\" fill=\"none\" stroke=\"#a7bcc2\" stroke-width=\"13\"\/><path d=\"M145 395 H275\" stroke=\"#a7bcc2\" stroke-width=\"13\"\/><circle cx=\"210\" cy=\"285\" r=\"35\" fill=\"#e8c37b\"\/><text x=\"118\" y=\"435\" font-size=\"24\" font-weight=\"700\">MV substation<\/text><text x=\"130\" y=\"467\" font-size=\"17\">18\/30 kV feeder<\/text>\n <rect x=\"480\" y=\"220\" width=\"280\" height=\"260\" rx=\"15\" fill=\"#0b202b\" stroke=\"#62df9c\" stroke-width=\"4\"\/><rect x=\"535\" y=\"285\" width=\"170\" height=\"115\" fill=\"#263941\" stroke=\"#a6c2c7\" stroke-width=\"6\"\/><circle cx=\"570\" cy=\"320\" r=\"10\" fill=\"#62df9c\"\/><circle cx=\"610\" cy=\"320\" r=\"10\" fill=\"#ff777f\"\/><circle cx=\"650\" cy=\"320\" r=\"10\" fill=\"#55dff7\"\/><path d=\"M560 370 H680\" stroke=\"#e8c37b\" stroke-width=\"8\"\/><text x=\"530\" y=\"435\" font-size=\"24\" font-weight=\"700\" fill=\"#62df9c\">Switchgear<\/text><text x=\"525\" y=\"467\" font-size=\"17\">screen bond \/ test point<\/text>\n <rect x=\"890\" y=\"220\" width=\"280\" height=\"260\" rx=\"15\" fill=\"#0b202b\" stroke=\"#e8c37b\" stroke-width=\"4\"\/><path d=\"M945 405 V330 H1115 V405\" fill=\"none\" stroke=\"#e8c37b\" stroke-width=\"10\"\/><path d=\"M960 350 H1100\" stroke=\"#55dff7\" stroke-width=\"8\"\/><path d=\"M960 380 H1100\" stroke=\"#62df9c\" stroke-width=\"8\"\/><text x=\"925\" y=\"435\" font-size=\"24\" font-weight=\"700\" fill=\"#e8c37b\">Duct \/ trench<\/text><text x=\"925\" y=\"467\" font-size=\"17\">drainage + thermal route<\/text>\n <rect x=\"1300\" y=\"220\" width=\"280\" height=\"260\" rx=\"15\" fill=\"#0b202b\" stroke=\"#aa9bff\" stroke-width=\"4\"\/><path d=\"M1340 400 V300 H1535 V400\" fill=\"none\" stroke=\"#a6c2c7\" stroke-width=\"11\"\/><path d=\"M1380 400 V345 M1440 400 V345 M1500 400 V345\" stroke=\"#55dff7\" stroke-width=\"8\"\/><text x=\"1340\" y=\"435\" font-size=\"24\" font-weight=\"700\" fill=\"#aa9bff\">Industrial load<\/text><text x=\"1340\" y=\"467\" font-size=\"17\">motor \/ transformer \/ process<\/text>\n <path d=\"M350 350 H470 M760 350 H880 M1170 350 H1290\" stroke=\"#dcebf0\" stroke-width=\"5\" marker-end=\"url(#yc7v-app-arrow)\"\/>\n <path d=\"M210 480 V755 H1440 V480\" fill=\"none\" stroke=\"#2f4c59\" stroke-width=\"40\"\/><path d=\"M210 480 V755 H1440 V480\" fill=\"none\" stroke=\"#e8c37b\" stroke-width=\"7\"\/>\n <text x=\"210\" y=\"835\" fill=\"#ffaaa5\" font-size=\"24\" font-weight=\"700\">Fixed single-core MV route<\/text><text x=\"210\" y=\"872\" fill=\"#dcebf0\" font-size=\"18\">Use in underground, duct or exposed fixed installation only after screen, thermal and fire design approval.<\/text>\n <rect x=\"80\" y=\"900\" width=\"1740\" height=\"68\" rx=\"10\" fill=\"#081b24\" stroke=\"#315b6f\" stroke-width=\"2\"\/><text x=\"110\" y=\"943\" font-size=\"18\" fill=\"#ffaaa5\">The source does not establish reeling, festoon, drag-chain or continuous-flex service. Select a qualified dynamic cable family when movement is required.<\/text>\n<\/g><\/svg><\/div><div class=\"grid\"><div class=\"box\"><b>18\/30 kV distribution feeders<\/b><br>Use after voltage, insulation-coordination, screen-bonding, thermal, voltage-drop and protection studies are complete.<\/div><div class=\"box\"><b>Underground infrastructure<\/b><br>Check soil thermal resistivity, water exposure, drainage, route spacing, joint access, mechanical protection and fault return paths.<\/div><div class=\"box\"><b>Duct installations<\/b><br>Check duct fill, pulling tension, sidewall pressure, entry radius, phase formation, heat dissipation and water management.<\/div><div class=\"box\"><b>Industrial and port shore-side fixed routes<\/b><br>Evaluate substations, plant feeders and shore-side MV infrastructure for corrosion, flooding, impact, fire, maintenance and earthing.<\/div><div class=\"box\"><b>Moving equipment<\/b><br>The supplied record establishes fixed-route service and a laying factor, not continuous flexing. Select a dedicated dynamic cable for reeling, festoon or drag-chain motion.<\/div><\/div>\n\n<h2>12. Handling and termination<\/h2><div class=\"svg\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1900 1040\" role=\"img\" aria-label=\"Single-core YXC7V N2XSY installation diagram showing drum pay-off, 12 times diameter bend control, screen preparation and termination\">\n<defs><marker id=\"yc7v-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=\"yc7v-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=\"1040\" fill=\"#06131b\"\/><rect y=\"670\" width=\"1900\" height=\"370\" fill=\"url(#yc7v-floor)\"\/><path d=\"M0 670 H1900\" stroke=\"#6a888f\" stroke-width=\"4\"\/>\n<text x=\"60\" y=\"64\" fill=\"#55dff7\" font-family=\"Arial\" font-size=\"36\" font-weight=\"700\">Installation controls \u2014 12 \u00d7 D laying factor<\/text><text x=\"60\" y=\"104\" fill=\"#adc4ce\" font-family=\"Arial\" font-size=\"18\">The source publishes a 12 (xD) laying factor. Apply the ordered size’s outer diameter and still follow the controlled installation method.<\/text>\n<g font-family=\"Arial\" fill=\"#eaf6fa\">\n <rect x=\"70\" y=\"250\" width=\"240\" height=\"235\" rx=\"15\" fill=\"#0b202b\" stroke=\"#55dff7\" stroke-width=\"4\"\/><circle cx=\"190\" cy=\"345\" r=\"70\" fill=\"#364b54\" stroke=\"#c2d0d5\" stroke-width=\"12\"\/><circle cx=\"190\" cy=\"345\" r=\"30\" fill=\"#263941\" stroke=\"#e8c37b\" stroke-width=\"8\"\/><path d=\"M190 275 V415 M120 345 H260\" stroke=\"#a9c1c5\" stroke-width=\"7\"\/><text x=\"115\" y=\"458\" font-size=\"23\" font-weight=\"700\">Drum pay-off<\/text><text x=\"105\" y=\"488\" font-size=\"16\">single-core cable \u00b7 ends sealed<\/text>\n <path d=\"M310 345 C430 345 450 545 590 545\" fill=\"none\" stroke=\"#10171b\" stroke-width=\"65\"\/><path d=\"M310 345 C430 345 450 545 590 545\" fill=\"none\" stroke=\"#536d77\" stroke-width=\"48\"\/><path d=\"M310 345 C430 345 450 545 590 545\" fill=\"none\" stroke=\"#e8c37b\" stroke-width=\"6\"\/>\n <path d=\"M345 185 H640\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#yc7v-inst-arrow)\"\/><text x=\"78\" y=\"160\" font-size=\"22\" font-weight=\"700\" fill=\"#e8c37b\">Controlled pulling direction<\/text><text x=\"78\" y=\"194\" font-size=\"17\">Protect the PVC sheath and concentric copper screen from local damage.<\/text>\n <rect x=\"590\" y=\"495\" width=\"380\" height=\"95\" rx=\"12\" fill=\"#263941\" stroke=\"#9eb7bd\" stroke-width=\"5\"\/><path d=\"M670 542 H890\" stroke=\"#e8c37b\" stroke-width=\"14\"\/><text x=\"630\" y=\"680\" font-size=\"23\" font-weight=\"700\">Roller \/ support<\/text><text x=\"630\" y=\"712\" font-size=\"17\">maintain radius; avoid screen and sheath crushing<\/text>\n <path d=\"M970 545 H1100\" stroke=\"#536d77\" stroke-width=\"48\"\/><path d=\"M970 545 H1100\" stroke=\"#dcebf0\" stroke-width=\"3\" marker-end=\"url(#yc7v-inst-arrow)\"\/><rect x=\"1100\" y=\"385\" width=\"330\" height=\"305\" rx=\"15\" fill=\"#0b202b\" stroke=\"#62df9c\" stroke-width=\"4\"\/><rect x=\"1170\" y=\"470\" width=\"190\" height=\"115\" fill=\"#263941\" stroke=\"#a6c2c7\" stroke-width=\"6\"\/><circle cx=\"1265\" cy=\"520\" r=\"48\" fill=\"#c77531\" stroke=\"#f4c184\" stroke-width=\"7\"\/><circle cx=\"1265\" cy=\"520\" r=\"30\" fill=\"#2c4b56\" stroke=\"#e8c37b\" stroke-width=\"5\"\/><path d=\"M1190 600 H1340\" stroke=\"#55dff7\" stroke-width=\"7\"\/><text x=\"1145\" y=\"645\" font-size=\"23\" font-weight=\"700\">Single-core termination<\/text><text x=\"1145\" y=\"677\" font-size=\"17\">phase \/ screen \/ earth bond record<\/text>\n <rect x=\"330\" y=\"800\" width=\"640\" height=\"105\" rx=\"12\" fill=\"#0e2934\" stroke=\"#55dff7\" stroke-width=\"4\"\/><text x=\"370\" y=\"845\" font-size=\"23\" font-weight=\"700\" fill=\"#55dff7\">Minimum laying radius<\/text><text x=\"370\" y=\"878\" font-size=\"18\">r = 12 \u00d7 D: 342.0 mm for 31.0 mm to 55.0 mm, depending on ordered size for 36.3 mm.<\/text>\n <path d=\"M1430 545 H1780\" stroke=\"#62df9c\" stroke-width=\"4\"\/><text x=\"1470\" y=\"455\" font-size=\"23\" font-weight=\"700\" fill=\"#62df9c\">Acceptance checks<\/text><text x=\"1470\" y=\"495\" font-size=\"17\">document revision<\/text><text x=\"1470\" y=\"525\" font-size=\"17\">outer sheath inspection<\/text><text x=\"1470\" y=\"555\" font-size=\"17\">screen continuity<\/text><text x=\"1470\" y=\"585\" font-size=\"17\">phase identification<\/text><text x=\"1470\" y=\"615\" font-size=\"17\">short-circuit design<\/text><text x=\"1470\" y=\"645\" font-size=\"17\">termination compatibility<\/text>\n <rect x=\"80\" y=\"945\" width=\"1740\" height=\"58\" rx=\"10\" fill=\"#081b24\" stroke=\"#315b6f\" stroke-width=\"2\"\/><text x=\"110\" y=\"981\" font-size=\"18\" fill=\"#ffaaa5\">12 \u00d7 D is a laying factor, not a continuous-flex qualification. Do not install this fixed-route cable in a reeling or energy-chain application without a dedicated dynamic design.<\/text>\n<\/g><\/svg><\/div><ol><li>Confirm the exact controlled conductor size, matrix row, revision, outer diameter, mass and accessory family before delivery.<\/li><li>Apply the 12\u00d7D laying factor to the ordered diameter. The arithmetic screening radii span 372.0 mm for 50 mm\u00b2 to 660.0 mm for 630 mm\u00b2.<\/li><li>Keep the drum aligned with the pay-off direction. Prevent reverse winding, uncontrolled twist, flange impact and local PVC sheath damage.<\/li><li>Use rollers and supports that control radius and sidewall pressure. Do not pull against a sharp duct entry or force the copper screen around a local obstruction.<\/li><li>Prepare the conductor screen, XLPE insulation, semiconducting screen, copper wires, copper tape and PVC sheath using the approved 18\/30 kV joint or termination method.<\/li><li>Record screen continuity, bonding arrangement, phase identification, conductor resistance, insulation and sheath tests, torque and accessory inspection before energisation.<\/li><li>Complete MV withstand or partial-discharge tests where specified by the project and retain the product record, batch, test results and as-built route documentation.<\/li><\/ol><div class=\"warn\"><b>Installation release:<\/b> 12\u00d7D is a laying-factor reference. It does not authorize repeated bending, torsion, reel operation or energy-chain installation.<\/div>\n\n<h2>13. Selection comparison for engineers<\/h2>\n<div class=\"scroll\"><table><thead><tr><th>Requirement<\/th><th>YXC7V \/ N2XSY reference<\/th><th>What must be verified<\/th><th>Engineering decision<\/th><\/tr><\/thead><tbody>\n<tr><td class=\"key\">18\/30 kV fixed single-core feeder<\/td><td>Cu \/ XLPE \/ semiconducting screens \/ concentric copper wires + copper tape \/ PVC.<\/td><td>System earthing, screen bonding, conductor size, formation, accessories and protection.<\/td><td class=\"source\">Candidate after exact-size release.<\/td><\/tr>\n<tr><td class=\"key\">50\u2013240 mm\u00b2 selection<\/td><td>Published diameter 31.0\u201342.0 mm; DCR 0.387\u20130.0754 Ohm\/km; buried trefoil 196\u2013469 A.<\/td><td>Voltage drop, route correction, pulling, screen duty and termination dimensions.<\/td><td class=\"source\">Use the exact matrix row.<\/td><\/tr>\n<tr><td class=\"key\">300\u2013630 mm\u00b2 selection<\/td><td>Published diameter 44.0\u201355.0 mm; DCR 0.06\u20130.028 Ohm\/km; buried trefoil 526\u2013774 A.<\/td><td>Thermal correction, duct capacity, joint size, drum handling and installation radius.<\/td><td class=\"source\">Use the exact matrix row.<\/td><\/tr>\n<tr><td class=\"key\">500 \/ 630 mm\u00b2 air-flat values<\/td><td>615 A and 421 A as supplied.<\/td><td>Confirm these unusual adjacent-row values against the controlled source before ampacity release.<\/td><td class=\"warn\">Do not silently correct source data.<\/td><\/tr>\n<tr><td class=\"key\">Reeling \/ festoon \/ drag chain<\/td><td>12\u00d7D laying factor and fixed-route application wording only.<\/td><td>Cycles, torsion, speed, acceleration, tensile load, dynamic bend radius and environmental tests.<\/td><td class=\"warn\">Select a dedicated dynamic cable family.<\/td><\/tr>\n<\/tbody><\/table><\/div><div class=\"svg\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1900 930\" role=\"img\" aria-label=\"YXC7V N2XSY 18\/30 kV engineering selection flow for single-core PVC sheathed cable\">\n<defs><marker id=\"yc7v-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=\"930\" fill=\"#06131b\"\/><text x=\"60\" y=\"65\" fill=\"#55dff7\" font-family=\"Arial\" font-size=\"36\" font-weight=\"700\">YXC7V \/ N2XSY release gate \u2014 select the exact size and route<\/text>\n<g font-family=\"Arial\" fill=\"#eaf6fa\">\n <rect x=\"60\" y=\"220\" width=\"270\" height=\"190\" rx=\"14\" fill=\"#0b202b\" stroke=\"#55dff7\" stroke-width=\"4\"\/><text x=\"112\" y=\"280\" font-size=\"24\" font-weight=\"700\">1. System basis<\/text><text x=\"112\" y=\"320\" font-size=\"18\">18\/30 kV<\/text><text x=\"112\" y=\"353\" font-size=\"18\">single-core phase<\/text><text x=\"112\" y=\"386\" font-size=\"18\">load \/ fault \/ route<\/text><path d=\"M330 315 H445\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#yc7v-sel-arrow)\"\/>\n <rect x=\"445\" y=\"170\" width=\"310\" height=\"290\" rx=\"14\" fill=\"#0b202b\" stroke=\"#e8c37b\" stroke-width=\"4\"\/><text x=\"505\" y=\"235\" font-size=\"24\" font-weight=\"700\" fill=\"#e8c37b\">2. Select row<\/text><text x=\"505\" y=\"280\" font-size=\"18\">185 mm\u00b2 \/ Ref 10587755<\/text><text x=\"505\" y=\"315\" font-size=\"18\">240 mm\u00b2 \/ Ref 10588819<\/text><text x=\"505\" y=\"350\" font-size=\"18\">28.5 or 36.3 mm OD<\/text><text x=\"505\" y=\"385\" font-size=\"18\">25 or 50 mm\u00b2 screen<\/text><text x=\"505\" y=\"430\" font-size=\"16\" fill=\"#ffaaa5\">match the ordered product<\/text><path d=\"M755 315 H870\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#yc7v-sel-arrow)\"\/>\n <rect x=\"870\" y=\"170\" width=\"310\" height=\"290\" rx=\"14\" fill=\"#0b202b\" stroke=\"#ff777f\" stroke-width=\"4\"\/><text x=\"930\" y=\"235\" font-size=\"24\" font-weight=\"700\" fill=\"#ffaaa5\">3. Check route<\/text><text x=\"930\" y=\"280\" font-size=\"18\">12 \u00d7 D laying radius<\/text><text x=\"930\" y=\"315\" font-size=\"18\">air \/ buried formation<\/text><text x=\"930\" y=\"350\" font-size=\"18\">screen bonding<\/text><text x=\"930\" y=\"385\" font-size=\"18\">PVC fire behaviour<\/text><text x=\"930\" y=\"430\" font-size=\"16\" fill=\"#ffaaa5\">recalculate for project<\/text><path d=\"M1180 315 H1295\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#yc7v-sel-arrow)\"\/>\n <rect x=\"1295\" y=\"170\" width=\"310\" height=\"290\" rx=\"14\" fill=\"#0b202b\" stroke=\"#62df9c\" stroke-width=\"4\"\/><text x=\"1350\" y=\"235\" font-size=\"24\" font-weight=\"700\" fill=\"#62df9c\">4. Verify dossier<\/text><text x=\"1350\" y=\"280\" font-size=\"18\">IEC 60502-2<\/text><text x=\"1350\" y=\"315\" font-size=\"18\">source fire record \/ DoP<\/text><text x=\"1350\" y=\"350\" font-size=\"18\">screen I\u00b2t<\/text><text x=\"1350\" y=\"385\" font-size=\"18\">accessories<\/text><text x=\"1350\" y=\"420\" font-size=\"18\">test records<\/text><path d=\"M1605 315 H1720\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#yc7v-sel-arrow)\"\/>\n <rect x=\"1720\" y=\"170\" width=\"120\" height=\"290\" rx=\"14\" fill=\"#0b202b\" stroke=\"#aa9bff\" stroke-width=\"4\"\/><text x=\"1740\" y=\"235\" font-size=\"21\" font-weight=\"700\" fill=\"#aa9bff\">5. Release<\/text><text x=\"1740\" y=\"280\" font-size=\"16\">data<\/text><text x=\"1740\" y=\"315\" font-size=\"16\">tests<\/text><text x=\"1740\" y=\"350\" font-size=\"16\">kits<\/text><text x=\"1740\" y=\"385\" font-size=\"16\">records<\/text>\n <path d=\"M1025 460 V610\" stroke=\"#dcebf0\" stroke-width=\"4\" marker-end=\"url(#yc7v-sel-arrow)\"\/><rect x=\"675\" y=\"610\" width=\"690\" height=\"180\" rx=\"14\" fill=\"#081b24\" stroke=\"#55dff7\" stroke-width=\"4\"\/><text x=\"755\" y=\"670\" font-size=\"25\" font-weight=\"700\" fill=\"#55dff7\">6. Verify before energisation<\/text><text x=\"755\" y=\"712\" font-size=\"18\">phase ID \u00b7 screen continuity \u00b7 sheath test<\/text><text x=\"755\" y=\"745\" font-size=\"18\">short-circuit I\u00b2t \u00b7 insulation test \u00b7 fire record<\/text>\n <path d=\"M675 700 H410\" stroke=\"#ff777f\" stroke-width=\"4\" marker-end=\"url(#yc7v-sel-arrow)\"\/><rect x=\"70\" y=\"610\" width=\"340\" height=\"180\" 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 required<\/text><text x=\"115\" y=\"710\" font-size=\"18\">reeling \/ festoon \/ drag chain<\/text><text x=\"115\" y=\"745\" font-size=\"18\">select dynamic cable family<\/text>\n <text x=\"1400\" y=\"625\" font-size=\"18\" fill=\"#ffaaa5\">Do not replace<\/text><text x=\"1400\" y=\"658\" font-size=\"18\" fill=\"#ffaaa5\">PVC fixed cable data.<\/text>\n<\/g><\/svg><\/div>\n\n<h2>14. Failure-mode controls<\/h2>\n<div class=\"scroll\"><table><thead><tr><th>Failure mode<\/th><th>Mechanism<\/th><th>Control action<\/th><th>Release evidence<\/th><\/tr><\/thead><tbody>\n<tr><td class=\"key\">Wrong voltage class<\/td><td>18\/30 kV cable is confused with a lower-voltage accessory system.<\/td><td>Lock voltage, insulation level, screen termination and accessory class on the purchase schedule.<\/td><td class=\"source\">Approved cable and accessory schedule.<\/td><\/tr>\n<tr><td class=\"key\">Matrix-row mixing<\/td><td>Diameter, mass, resistance, ampacity and fault values are copied across sizes.<\/td><td>Use the exact cross-section row on every calculation, drum record, joint schedule and test sheet.<\/td><td class=\"source\">Controlled matrix and released drawing.<\/td><\/tr>\n<tr><td class=\"key\">Radius violation<\/td><td>12\u00d7D is applied to the wrong diameter or ignored at duct entries.<\/td><td>Calculate the ordered-size radius and control rollers, entry geometry and support spacing.<\/td><td class=\"source\">Method statement and inspection.<\/td><\/tr>\n<tr><td class=\"key\">Screen fault-path error<\/td><td>Presence of copper wires and tape is treated as a complete earth-fault guarantee.<\/td><td>Verify screen section, bonding, parallel paths, clearing time, temperature and joint capability from controlled data.<\/td><td class=\"source\">Earthing and short-circuit study.<\/td><\/tr>\n<tr><td class=\"key\">Air-flat anomaly ignored<\/td><td>615 A and 421 A are used without checking the source revision.<\/td><td>Confirm the supplied values against the controlled release before thermal design.<\/td><td class=\"source\">Signed datasheet verification.<\/td><\/tr>\n<tr><td class=\"key\">Dynamic misuse<\/td><td>Fixed-route PVC cable is installed on a reel, festoon or energy chain.<\/td><td>Select a qualified dynamic cable with mechanical cycle and torsion evidence.<\/td><td class=\"warn\">Dedicated dynamic-cable data required.<\/td><\/tr>\n<\/tbody><\/table><\/div>\n\n<h2>15. Feichun Cable certification and project assurance<\/h2>\n<div class=\"note\"><b>Engineered for maximum safety in demanding environments, our cable systems comply with global standards including ATEX, IECEx, VDE, CE, UKCA, EAC, and the Russian Fire Safety Certificate. 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.<\/b><\/div>\n<div class=\"grid\"><div class=\"box\"><b>Configuration-specific release<\/b><br>Certification and market documentation apply to the exact conductor size, screen geometry, sheath compound, accessory system, destination market and shipment batch.<\/div><div class=\"box\"><b>Feichun engineering dossier<\/b><br>Confirm conductor resistance, outer diameter, mass, thermal ratings, short-circuit duty, sheath tests, fire declaration and accessory compatibility for the ordered 18\/30 kV construction.<\/div><div class=\"box\"><b>Fixed MV engineering value<\/b><br>Feichun can develop the copper \/ XLPE \/ concentric copper-screen \/ PVC architecture around the actual route, protection system, earthing design and project documentation.<\/div><div class=\"box\"><b>Market and application boundary<\/b><br>ATEX, IECEx, VDE, CE, UKCA, EAC and Russian Fire Safety documentation must be matched to the applicable product scope; certification capability is not an automatic claim for every size or construction.<\/div><\/div>\n<div class=\"warn\"><b>Release condition:<\/b> this article does not invent a Feichun certificate number, test report number or conformity declaration. The ordered product dossier must be checked before procurement, installation or energisation.<\/div>\n\n<h2>16. Source and revision audit<\/h2><div class=\"scroll\"><table><thead><tr><th>Source<\/th><th>Use in this article<\/th><th>Status and limitation<\/th><\/tr><\/thead><tbody>\n<tr><td><a href=\"https:\/\/www.nexans.com.tr\/en\/products\/xlpe-insulated-medium-voltage\/copper-conductor\/YXC7V-%28TSE-64443.html\" target=\"_blank\" rel=\"nofollow noopener\">Nexans T\u00fcrkiye YXC7V \/ N2XSY family page<\/a><\/td><td>Family designation and related product-family context.<\/td><td>External family reference; the supplied Feichun target record remains primary for every listed matrix value.<\/td><\/tr>\n<tr><td><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/95394\" target=\"_blank\" rel=\"nofollow noopener\">IEC 60502-2 official publication<\/a><\/td><td>Product-standard and fixed-installation engineering context.<\/td><td>Confirm the adopted edition and exact Feichun conformity route.<\/td><\/tr>\n<tr><td><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/80873\" target=\"_blank\" rel=\"nofollow noopener\">IEC 60332-1-2 official publication<\/a><\/td><td>Single-cable flame-propagation test context.<\/td><td>Test-method reference only; it is not a complete grouped-cable fire declaration.<\/td><\/tr>\n<tr><td>User-supplied source record<\/td><td>All voltage, temperature, bending, flame, construction, page metadata and eleven matrix rows are reproduced.<\/td><td>Primary record for this article. Missing screen section, screen fault rating and buried-flat rating are not inferred.<\/td><\/tr>\n<tr><td>Derived calculations<\/td><td>12\u00d7D radius screening and kg\/100 m conversion.<\/td><td>Arithmetic only; not a substitute for the controlled installation method or accessory instruction.<\/td><\/tr>\n<\/tbody><\/table><\/div><div class=\"warn\">This article supports preliminary engineering, technical search and comparison. The final Feichun YXC7V \/ N2XSY 18\/30 kV release must be checked against the current product datasheet, exact conductor size, screen design, current ratings, bending instructions, fire documentation, accessories, installation method and local authority requirements.<\/div>\n\n<footer><div class=\"wrap\"><h3>Feichun Cable \u2014 YXC7V \/ N2XSY 18\/30 kV 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 supplied values, derived calculations, external references and Feichun project-confirmation values. No external contact details are added.<\/p><div>FEICHUN-YXC7V-N2XSY-18-30KV-ENGINEERING-EN \u00b7 03 August 2026<\/div><\/div><\/footer>\n<\/main>\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"A full-English engineering guide to the supplied 18\/30 kV construction: copper conductor, semiconducting conductor screen, XLPE insulation, semiconducting insulation screen, crape tape, concentric copper wires with copper tape and PVC outer sheath. The article separates source values, derived checks and project-release boundaries.","protected":false},"author":1,"featured_media":25270,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_singular_sidebar":"left","csco_page_header_type":"title","csco_page_load_nextpost":"","footnotes":""},"categories":[66,56],"tags":[16,111,17],"class_list":["post-25269","post","type-post","status-publish","format-standard","has-post-thumbnail","category-common-problems-encountered-in-cable-applications","category-reeling-cable","tag-din-vde-0250","tag-mining-cable","tag-reeling-cable","cs-entry"],"_links":{"self":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/25269","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=25269"}],"version-history":[{"count":2,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/25269\/revisions"}],"predecessor-version":[{"id":25273,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/25269\/revisions\/25273"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media\/25270"}],"wp:attachment":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media?parent=25269"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/categories?post=25269"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/tags?post=25269"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":25269,"date":"2026-08-04T14:17:04","date_gmt":"2026-08-04T06:17:04","guid":{"rendered":"https:\/\/feichuncables.com\/blog\/?p=25269"},"modified":"2026-08-04T14:17:09","modified_gmt":"2026-08-04T06:17:09","slug":"yxc7v-tse-n2xsy-iec-18-30-kv-single-core-xlpe-copper-cable","status":"publish","type":"post","link":"https:\/\/feichuncables.com\/blog\/yxc7v-tse-n2xsy-iec-18-30-kv-single-core-xlpe-copper-cable\/","title":{"rendered":"YXC7V (TSE) \/ N2XSY (IEC) 18\/30 kV \u2014 Single-Core XLPE Copper Cable"},"content":{"rendered":"\n