Parallel Cable Derating Calculator

Calculate current sharing and derating for parallel conductor installations per NEC 310.10(G).

Ampacity of each individual cable.
A
Number of cables per phase in parallel.
Estimated current imbalance factor (0.9-1.0).

Results

Total Ampacity-A
Effective Ampacity-A
Max Current per Cable-A
References: NEC 310.10(G); IEEE Std 835; Okonite Cable Engineering Data