Electrician Red Seal · Question
A 5 hp, 208V, 3-phase motor has a nameplate FLA of 15.2A and a service factor of 1.15. What is the maximum allowable setting for its overload protection?
For a motor with a service factor of 1.15 or greater, CEC Rule 28-306(1)(a) allows the overload device to be set at up to 125% of the motor's FLA. Therefore, 15
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Question: A 5 hp, 208V, 3-phase motor has a nameplate FLA of 15.2A and a service factor of 1.15. What is the maximum allowable setting for its overload protection?
Answer options:
- 15.2 A
- 17.48 A ✅ 19.0 A
- 22.8 A
Correct answer: 19.0 A
Explanation: For a motor with a service factor of 1.15 or greater, CEC Rule 28-306(1)(a) allows the overload device to be set at up to 125% of the motor's FLA. Therefore, 15.2A * 1.25 = 19.0A.
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