Electrician Red Seal · Question
A 10 hp, 575V, 3-phase squirrel cage induction motor has a nameplate full-load current (FLC) of 11A. What is the maximum permissible rating for its non-time-delay fuses?
According to CEC Table 29, the maximum rating for non-time-delay fuses for a squirrel cage motor is 300% of the FLC. Calculation: 11A * 3.00 = 33A. Since 33A is
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Question: A 10 hp, 575V, 3-phase squirrel cage induction motor has a nameplate full-load current (FLC) of 11A. What is the maximum permissible rating for its non-time-delay fuses?
Answer options:
- 15A
- 30A ✅ 35A
- 40A
Correct answer: 35A
Explanation: According to CEC Table 29, the maximum rating for non-time-delay fuses for a squirrel cage motor is 300% of the FLC. Calculation: 11A * 3.00 = 33A. Since 33A is not a standard fuse size, Rule 14-104 allows you to use the next higher standard size, which is 35A.
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