Nec Next Size Up Breaker Rule 2025

Nec Next Size Up Breaker Rule 2025. An ocpd protects equipment by opening when it detects a short circuit or ground fault. 60 amp breaker (actual calculation 57.5 amps) next size breaker up is 60).

Based on 240.6 this would require a 400 amps overcurrent protection device due to the “next size up” rule found in 240.4(b). 240.21(b)] or transformer secondary conductors [sec.