Cable Sizing Calculator

Calculate minimum cable size based on current capacity, voltage drop, and short-circuit rating per NEC standards.

Maximum continuous current.
A
Line-to-line voltage.
V
Distance from source to load.
m
Load power factor.
1 for single phase, 3 for three phase.
NEC recommended: 3% for branch, 5% total.
%

Results

Min Cable Area (for VD)-mm²
Voltage Drop-V
Voltage Drop-%
Cable Power Loss-kW
References: NEC Tables 310.16-310.20; IEEE Std 835