Electrician Red Seal · Question
An electrician is troubleshooting a commercial kitchen circuit. A 3-phase, 208 V, 5 hp motor is connected. The motor's nameplate indicates a full load current (FLC) of 16.7 A. According to the Canadian Electrical Code, what is the minimum continuous current rating required for the branch circuit conductors supplying this motor?
When sizing conductors for a motor, Rule 28-106(1) of the CEC specifies that continuous current rating of the conductors shall be not less than the value of the
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Question: An electrician is troubleshooting a commercial kitchen circuit. A 3-phase, 208 V, 5 hp motor is connected. The motor's nameplate indicates a full load current (FLC) of 16.7 A. According to the Canadian Electrical Code, what is the minimum continuous current rating required for the branch circuit conductors supplying this motor?
Answer options:
- 20.9 A
- 25.0 A ✅ 16.7 A
- 29.2 A
Correct answer: 16.7 A
Explanation: When sizing conductors for a motor, Rule 28-106(1) of the CEC specifies that continuous current rating of the conductors shall be not less than the value of the full load current (FLC) obtained from Table 44 in the CEC. For a 5 hp, 208 V, 3-phase motor, Table 44 lists an FLC of 16.7 A. Therefore, the minimum continuous current rating required for the conductors is 16.7 A, not 125% of the nameplate value.
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