Motor Circuit Breaker Sizing Calculator. This calculator will also give you motor amps and recommended breaker size starter size heater size and conduit size. Electric circuit diagram template use google drive to make online shareable electric circuit diagrams.
Electric circuit diagram template use google drive to make online shareable electric circuit diagrams. How to calculate the main circuit breaker. Or cb ampacity is 17a which means we can select 20a as our circuit breaker size.
Based on table 2 above we now can select standard circuit breaker size.
A 30a circuit breaker can safely carry the exact 30a current but nec suggests 80 as a safe current limit as compared to the rated current of cbs. Therefore it is good practice to size the breaker at 15 amps. The motor wire size calculator will calculate the proper wire size for a given motor hp and voltage. How to calculate the main circuit breaker.
