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Cable Sizing Calculator

An online calculator for determining the minimum permissible cable cross-section based on continuous current-carrying capacity. Takes into account conductor material (copper/aluminum), installation method (in air, in ground, in conduit), number of loaded cores, and ambient temperature.

Calculations follow IEC 60364-5-52 ampacity tables and GOST R 50571.5-52. The calculator automatically applies derating factors for grouping and elevated ambient temperature.

Features

  • Minimum cross-section calculation by continuous current rating
  • Installation method support: in air, underground, in conduit, in trunking
  • Material selection: copper (Cu) and aluminum (Al)
  • Automatic selection of nearest standard cross-section
  • Compliance check against IEC and GOST requirements
  • Derating factor calculation (temperature, grouping)

Standards

  • IEC 60364-5-52 — Low-voltage electrical installations, current-carrying capacities
  • GOST R 50571.5-52 — Russian national standard for LV installations
  • IS 732 (India) — Code of practice for electrical wiring installations

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