Comprehensive Technical Guide to International Electrotechnical Commission Standard IEC 60502 — Power Cables with Extruded Insulation and Their Accessories for Rated Voltages from 1 kV to 30 kV
What is IEC 60502 Cable?
Comprehensive Technical Guide to International Electrotechnical Commission Standard IEC 60502 — Power Cables with Extruded Insulation and Their Accessories for Rated Voltages from 1 kV to 30 kV
Introduction to IEC 60502 Standard
IEC 60502 is an international standard published by the International Electrotechnical Commission (IEC) that sets out the specification for power cables with extruded insulation. The standard covers cables with voltage ratings from 1 kV (Um = 1.2 kV) up to 30 kV (Um = 36 kV), designed for fixed installations such as distribution networks and industrial installations. This widely recognized standard serves as a primary reference for cable manufacturers worldwide and forms the basis for numerous national and regional cable standards.
The standard comprehensively covers both the cables themselves and their accessories, specifying construction requirements, dimensional tolerances, and test methods. Cables manufactured in accordance with IEC 60502 must have extruded solid insulation and may incorporate longitudinal water-blocking properties such as swellable tapes and powders for installations in wet conditions. The standard includes cables with fire performance properties including reduced flame spread, low smoke emission, and halogen-free gas emission characteristics (LSZH/LSOH).
IEC 60502 is globally recognized and commonly referenced on power cable datasheets. While national nomenclatures may be used alongside specific references such as HD620 subclauses or BS 7870, the IEC 60502 standard enables easy cross-border specification and procurement. This standardization supports international trade and ensures consistent quality across different manufacturers and regions.
IEC 60502 es una norma internacional publicada por la Comisión Electrotécnica Internacional (IEC) que establece las especificaciones para cables de energía con aislamiento extruido. La norma cubre cables con tensiones nominales desde 1 kV (Um = 1,2 kV) hasta 30 kV (Um = 36 kV), diseñados para instalaciones fijas como redes de distribución e instalaciones industriales.
La norma abarca tanto los cables como sus accesorios, especificando requisitos de construcción, tolerancias dimensionales y métodos de ensayo. Los cables fabricados según IEC 60502 deben tener aislamiento sólido extruido y pueden incorporar propiedades de bloqueo de agua longitudinal. La norma incluye cables con propiedades de rendimiento ante fuego, incluyendo reducida propagación de llama, baja emisión de humo y características de emisión de gases libres de halógenos (LSZH).
IEC 60502 是國際電工委員會（IEC）發布的國際標準，規定了擠出絕緣電力電纜的規格。該標準涵蓋額定電壓從 1 kV（Um = 1.2 kV）到 30 kV（Um = 36 kV）的電纜，適用於配電網絡和工業設施等固定安裝場合。這一廣泛認可的標準是全球電纜製造商的主要參考依據，並構成許多國家和地區電纜標準的基礎。
該標準全面涵蓋電纜及其附件，規定結構要求、尺寸公差和測試方法。按照 IEC 60502 製造的電纜必須具有擠出實心絕緣，並可結合縱向阻水特性（如膨脹帶和粉末）用於潮濕環境安裝。該標準包括具有防火性能的電纜，包括減少火焰蔓延、低煙霧排放和無鹵素氣體排放特性（LSZH/LSOH）。
IEC 60502 Standard Structure
The IEC 60502 standard is divided into four parts, though currently only three parts are actively in use. Each part addresses specific voltage ranges and cable types, providing comprehensive coverage of power cables from low voltage distribution to medium voltage applications.
System Operating Categories (IEC 60502-1)
Technical Specifications
IEC 60502 provides detailed specifications for conductor types, insulation materials, sheathing compounds, and construction requirements. These specifications ensure consistent performance and quality across all cables manufactured to the standard.
Insulation Materials & Properties
| Insulation Type | Designation | Max. Conductor Temp. | Short-Circuit Temp. | Voltage Range | Standard Part |
|---|---|---|---|---|---|
| PVC/A | Polyvinyl Chloride (Type A) | 70°C | 140-160°C | 0.6/1, 1.8/3 kV | Part 1 |
| PVC/B | Polyvinyl Chloride (Type B) | 70°C | 140-160°C | 3.6/6 kV only | Part 2 |
| XLPE | Cross-linked Polyethylene | 90°C | 250°C | 0.6/1 – 18/30 kV | Part 1 & 2 |
| EPR | Ethylene Propylene Rubber | 90°C | 250°C | 0.6/1 – 18/30 kV | Part 1 & 2 |
| HEPR | Hard Ethylene Propylene Rubber | 90°C | 250°C | 0.6/1 – 18/30 kV | Part 1 & 2 |
Sheathing Compounds
| Category | Type Code | Material | Application |
|---|---|---|---|
| Thermoplastic | ST1, ST2 | PVC (Polyvinyl Chloride) | General purpose, indoor/outdoor |
| Thermoplastic | ST3, ST7 | PE (Polyethylene) | Direct burial, wet locations |
| Thermoplastic | ST8 | Halogen-Free (LSZH) | Fire-sensitive areas, tunnels |
| Elastomeric | SE1 | Polychloroprene / CSP | Oil/chemical resistant applications |
Conductor Specifications
| Class | Type | Materials | Size Range | Application |
|---|---|---|---|---|
| Class 1 | Solid | Plain/metal-coated Cu, Plain Al, Al alloy | 1.5 – 1000 mm² (Part 1) | Fixed installations |
| Class 2 | Stranded | Plain/metal-coated Cu, Plain Al, Al alloy | 10 – 1600 mm² (Part 2) | Fixed installations |
| Class 5 | Flexible | Plain/metal-coated Cu | 1.5 – 1000 mm² (Part 1) | Flexible applications |
Nominal Insulation Thickness (XLPE)
| Conductor Size | 0.6/1 kV | 1.8/3 kV | 3.6/6 kV | 6/10 kV | 8.7/15 kV | 12/20 kV | 18/30 kV |
|---|---|---|---|---|---|---|---|
| 25 – 50 mm² | 1.0 mm | 2.0 mm | 2.5 mm | 3.4 mm | 4.5 mm | 5.5 mm | 8.0 mm |
| 70 – 150 mm² | 1.1-1.4 mm | 2.0 mm | 2.5 mm | 3.4 mm | 4.5 mm | 5.5 mm | 8.0 mm |
| 185 – 400 mm² | 1.6-2.0 mm | 2.0 mm | 2.5 mm | 3.4 mm | 4.5 mm | 5.5 mm | 8.0 mm |
| 500 – 1000 mm² | 2.2-2.8 mm | 2.0-2.8 mm | 2.5 mm | 3.4 mm | 4.5 mm | 5.5 mm | 8.0 mm |
Mechanical Parameters
| Parameter | PVC Insulated | XLPE/EPR Insulated | Notes |
|---|---|---|---|
| Operating Temperature | up to 70°C | up to 90°C | Continuous operation |
| Minimum Ambient (PVC sheath) | -5°C | -5°C | Installation temperature |
| Minimum Ambient (PE sheath) | -20°C | -20°C | Installation temperature |
| Short-Circuit Temperature | 140-160°C | 250°C | Max 5 seconds duration |
| Bending Radius | 12 × OD | 12 × OD | During installation |
Source: Tratos IEC 60502-1, Addison Cables IEC 60502
IEC 60502 proporciona especificaciones detalladas para tipos de conductores, materiales de aislamiento y compuestos de cubierta. Los materiales de aislamiento incluyen PVC (temperatura máxima 70°C), XLPE, EPR y HEPR (todos con temperatura máxima 90°C). Las clases de conductores incluyen Clase 1 (sólido), Clase 2 (cableado) y Clase 5 (flexible), con rangos de tamaño desde 1.5 mm² hasta 1600 mm². Los compuestos de cubierta incluyen PVC, PE y materiales libres de halógenos para áreas sensibles al fuego.
IEC 60502 對導體類型、絕緣材料和護套化合物提供了詳細規格。絕緣材料包括 PVC（最高溫度 70°C）、XLPE、EPR 和 HEPR（均為最高 90°C）。導體類別包括第 1 類（實心）、第 2 類（絞合）和第 5 類（柔性），尺寸範圍從 1.5 mm² 到 1600 mm²。護套化合物包括 PVC、PE 和用於防火敏感區域的無鹵素材料。XLPE 絕緣的標稱厚度從 0.6/1 kV 的 1.0 mm 到 18/30 kV 的 8.0 mm 不等。
IEC 60502 Cable Types Comparison
The following comprehensive comparison covers the major cable types manufactured in accordance with IEC 60502, organized by voltage class (Low Voltage Part 1 and Medium Voltage Part 2), conductor material, and construction type.
Low Voltage Cables (IEC 60502-1: 0.6/1 kV)
| Type Code | Conductor | Insulation | Armour | Sheath | Cores | Application |
|---|---|---|---|---|---|---|
| N2XY | Copper | XLPE | — | PVC | 1-5 | General distribution |
| N2XH | Copper | XLPE | — | LSZH (FRNC) | 1-5 | Fire-sensitive areas |
| N2XBY | Copper | XLPE | Steel Tape | PVC | 1-5 | Direct burial |
| N2XBH | Copper | XLPE | Steel Tape | LSZH | 1-5 | Armoured, fire-safe |
| N2XCY | Copper | XLPE | Cu Concentric | PVC | Multi | EMC screening |
| N2XFGbY | Copper | XLPE | Steel Wire | PVC | 1-5 | Mechanical protection |
| NYY-J/O | Copper | PVC | — | PVC | 1-5 | General purpose |
| NYBY | Copper | PVC | Steel Tape | PVC | 1-5 | Armoured distribution |
| NYFGBY | Copper | PVC | Steel Wire | PVC | 1-5 | Heavy mechanical stress |
| NA2XRY | Aluminium | XLPE | Steel Wire (SWA) | PVC | 1-5 | Cost-effective armoured |
| NA2XRH | Aluminium | XLPE | Steel Wire (SWA) | LSZH (HFFR) | 1-5 | Fire-safe armoured |
| NA2XBY | Aluminium | XLPE | Steel Tape (DSTA) | PVC | 1-5 | Al conductor armoured |
| AXMK | Aluminium | XLPE | — | PVC | 1-5 | Nordic standard |
| AXMK PE | Aluminium | XLPE | — | PE | 1-5 | Direct burial Nordic |
| RVOV-K | Copper | XLPE | — | PVC | Multi | Flexible installation |
Medium Voltage Cables (IEC 60502-2: 6/10 kV – 18/30 kV)
Copper Conductor MV Cables
| Type Code | Insulation | Screen | Sheath | Water Block | Voltage Ratings |
|---|---|---|---|---|---|
| N2XS2Y | XLPE | Cu wire + tape | PE (MDPE/HDPE) | No | 6/10, 8.7/15, 12/20, 18/30 kV |
| N2XS(F)2Y | XLPE | Cu wire + tape | PE (MDPE/HDPE) | Longitudinal | 6/10, 8.7/15, 12/20, 18/30 kV |
| N2XS(FL)2Y | XLPE | Cu wire + Al tape | PE (bonded) | Long. + Radial | 6/10, 8.7/15, 12/20, 18/30 kV |
| FG7H1OAR | HEPR | Cu wire | LSZH | No | 3.6/6, 6/10, 8.7/15, 12/20 kV |
Aluminium Conductor MV Cables
| Type Code | Insulation | Screen | Sheath | Water Block | Voltage Ratings |
|---|---|---|---|---|---|
| NA2XS2Y | XLPE | Cu wire + tape | PE (MDPE/HDPE) | No | 6/10, 8.7/15, 12/20, 18/30 kV |
| NA2XS(F)2Y | XLPE | Cu wire + tape | PE (MDPE/HDPE) | Longitudinal | 6/10, 8.7/15, 12/20, 18/30 kV |
| NA2XS(FL)2Y | XLPE | Cu wire + Al tape | PE (bonded) | Long. + Radial | 6/10, 8.7/15, 12/20, 18/30 kV |
| NA2XSH | XLPE | Cu wire + tape | LSZH | No | 6/10, 8.7/15, 12/20, 18/30 kV |
| NA2XS(F)H | XLPE | Cu wire + tape | LSZH | Longitudinal | 6/10, 8.7/15, 12/20, 18/30 kV |
| NA2XS(FL)H | XLPE | Cu wire + Al tape | LSZH (bonded) | Long. + Radial | 6/10, 8.7/15, 12/20, 18/30 kV |
Voltage Test Requirements
| Rated Voltage U₀/U (Um) | Routine Test (AC) | Type Test (4h) | Impulse Test | Standard Part |
|---|---|---|---|---|
| 0.6/1 kV (1.2 kV) | 3.5 kV | 3.5 kV | — | Part 1 |
| 1.8/3 kV (3.6 kV) | 6.5 kV | 6.5 kV | 20 kV | Part 1 |
| 3.6/6 kV (7.2 kV) | 12 kV | 12 kV | 40 kV | Part 2 |
| 6/10 kV (12 kV) | 21 kV | 21 kV | 60 kV | Part 2 |
| 8.7/15 kV (17.5 kV) | 30 kV | 30 kV | 75 kV | Part 2 |
| 12/20 kV (24 kV) | 42 kV | 42 kV | 95 kV | Part 2 |
| 18/30 kV (36 kV) | 63 kV | 63 kV | 145 kV | Part 2 |
Applications & Installation
IEC 60502 cables are designed for fixed installations in power distribution networks and industrial facilities. The standard covers a wide range of installation methods and environmental conditions, with specific cable types suited to different applications.
| Application | LV Cables (Part 1) | MV Cables (Part 2) | Key Requirements |
|---|---|---|---|
| General Distribution | N2XY, NYY, AXMK | N2XS2Y, NA2XS2Y | Standard PVC or PE sheath |
| Direct Burial | N2XBY, NA2XRY, AXMK PE | N2XS(F)2Y, NA2XS(F)2Y | Armour and/or water blocking |
| Cable Ducts | N2XY, N2XH | N2XS2Y, NA2XS2Y | Unarmoured, smooth sheath |
| Fire-Sensitive Areas | N2XH, N2XBH, NA2XRH | NA2XSH, NA2XS(F)H | LSZH/FRNC sheath required |
| Wet/Waterlogged | PE sheath variants | N2XS(FL)2Y, NA2XS(FL)2Y | Longitudinal + radial water block |
| Masonry/Concrete | N2XBY, N2XFGbY, NYBY | Armoured variants | Mechanical protection |
| Industrial Plants | N2XCY, N2XY | N2XS2Y, FG7H1OAR | EMC screening if needed |
IEC 60502 excludes cables for special installation and service conditions such as: overhead line cables, mining industry cables, nuclear power plant cables (in and around containment area), submarine cables, shipboard cables, and cables for hazardous environments (explosive atmospheres). Where these exclusions apply, technical specifications typically reference cables manufactured “generally to IEC 60502” with additional requirements.
Source: Tratos IEC 60502-1 Applications, Caledonian IEC 60502 PDF
📚 Authoritative References & Standards
- IEC 60502-1 — Power cables 1kV and 3kV with extruded insulation | Tratos Group
- IEC 60502-2 — Power cables 6kV to 30kV with extruded insulation | Tratos Group
- IEC 60502 Overview — Complete standard cable guide | Eland Cables
- IEC 60228 — Conductor specifications for cables | GlobalSpec
- IEC 60502-4 — Test requirements for MV cable accessories | Tratos IEC 60502
- Single Core MV Cables to IEC 60502 — Technical specifications | Addison Cables
- Caledonian IEC 60502 Cables — PVC insulated cables guide | Caledonian Cables
- JENUIN IEC 60502 — Standard cable wire specifications | JENUIN Cable
Contact Anhui Feichun Special Cable
For technical inquiries regarding IEC 60502 power cables, XLPE/PVC insulated cable specifications, or quotation requests for international projects, please contact our engineering team.
