Electrician Red Seal · Question
What is the maximum number of overcurrent devices allowed in a lighting panelboard without a main breaker, according to the CEC?
The '42-circuit rule' for panelboards was removed from the Canadian Electrical Code several editions ago. Current CEC rules do not specify a maximum number of o
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Question: What is the maximum number of overcurrent devices allowed in a lighting panelboard without a main breaker, according to the CEC?
Answer options:
- 24
- 36
- 42 ✅ There is no limit specified.
Correct answer: There is no limit specified.
Explanation: The '42-circuit rule' for panelboards was removed from the Canadian Electrical Code several editions ago. Current CEC rules do not specify a maximum number of overcurrent devices in a panelboard, deferring to manufacturer listings and ampere ratings.
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