Nec Circuit Breaker Size 2025. Most techs oversize the wiring when it is not required, because it seems out of place to use the mca ampacity with the mop breaker, however, it is permitted by code. Does the nec allow overcurrent protection for conductors to be rounded up to the next larger size?
Circuit breakers are designed to trip (or break the motor circuit from the main supply) when motor circuit current exceeds the circuit breaker rating, preventing motor damage. What are the nec rules for sizing conductors terminated on a circuit breaker?