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