Electrician Red Seal · Question
A newly installed 20 A branch circuit supplying a single receptacle in a dwelling unit requires protection. According to the Canadian Electrical Code (CEC), what is the maximum permissible tripping current for a Type P (plug-in) circuit breaker used for this application?
Rule 14-104(1)(a) of the CEC specifies that overcurrent devices shall not have a tripping current greater than the ampacity of the circuit conductors. For a 20
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Question: A newly installed 20 A branch circuit supplying a single receptacle in a dwelling unit requires protection. According to the Canadian Electrical Code (CEC), what is the maximum permissible tripping current for a Type P (plug-in) circuit breaker used for this application?
Answer options:
- 15 A ✅ 20 A
- 25 A
- 30 A
Correct answer: 20 A
Explanation: Rule 14-104(1)(a) of the CEC specifies that overcurrent devices shall not have a tripping current greater than the ampacity of the circuit conductors. For a 20 A branch circuit, a 20 A overcurrent device is required. A 15 A breaker would trip prematurely, while 25 A or 30 A breakers would not provide adequate protection.
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