IEC 60502-1

Standard Overview

IEC 60502-1:2021 ensures safety, reliability, and performance for medium-voltage power cables in industrial and utility applications. Its strict testing requirements make it a globally recognized benchmark for extruded-insulation cables.

Key Technical Requirements

• Conductor
  • Copper or aluminum per IEC 60228
  • Stranded or solid core options
• Insulation
  • XLPE (Cross-linked polyethylene) or EPR (Ethylene Propylene Rubber)
  • Thickness specified based on voltage rating
• Voltage Rating
  • 1 kV (Um = 1.2 kV) and 3 kV (Um = 3.6 kV)
• Testing Requirements
  • Partial discharge test (≤ 10 pC at 1.73U₀)
  • 4-hour voltage test (3.5U₀)
  • Insulation resistance measurement
  • Mechanical tests (bending, tensile strength)

Applications

• Industrial power distribution (factories, plants)
• Underground and overhead power networks
• Renewable energy connections (solar/wind farms)

Compliance & Related Standards

• IEC 60502-2 (6kV – 30kV cables)
• IEC 60840 (High-voltage cables up to 150 kV)
• IEC 60228 (Conductor standards)