How the rating of the circuit breaker is decided? All Questions › Category: Switchgear And Protection › How the rating of the circuit breaker is decided? 0 Vote Up Vote Down CS Electrical And Electronics Staff asked 4 years ago I need short information. 1 Answers 0 Vote Up Vote Down CS Electrical And Electronics Staff answered 4 years ago Based on the symmetrical faults the rating of the circuit breaker is decided.