Comparing the Canadian Electrical Code (CEC) with the British Wiring Regulations I can see that both documents require consideration of voltage drop and current carrying capacity when designing circuits. However within the CEC there does not seem to be any consideration of the disconnection time of the circuit breaker in the event of a fault to ground (as explained in the link below).
So my query is can anyone you tell me if when designing circuits within Canada consideration of the disconnection time of circuit breakers is part of the design process.
http://www.electrical-installation.org/enwiki/Automatic_disconnection_for_TN_systems
