Busbar Current Rating Calculator

Calculate busbar current capacity based on cross-section, material, and temperature rise per IEEE C37.20.

Width of the busbar.
mm
Thickness of the busbar.
mm
Number of parallel bars per phase.
1=Copper, 2=Aluminum.
Allowable temp rise above ambient. Typical: 30-65°C.
°C

Results

Cross-Section Area-mm²
Current Rating per Phase-A
Current Density-A/mm²
Resistance per Meter-mΩ/m
References: IEEE C37.20 — Switchgear; IEC 61439