Question 13085 of 790 · California General Electrician Exam
What is the full-load current from Table 430.250 for a 10 hp, 208 volt, three-phase induction motor, and the resulting minimum conductor ampacity?
Exactly one answer is correct.
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Correct answer to question 13085
- A: 30.8 A; 38.5 A
Explanation
The 208 V column lists 30.8 A for 10 hp, and 30.8 x 1.25 = 38.5 A. 28 A is the 230 V value and 32.2 A is the 200 V value.
More questions: Electrical Calculations
- 13086A 20 hp, 460 volt, three-phase motor has a nameplate current of 26 A. Table 430.250 lists 27 A. What is the minimum branch-circuit conductor ampacity?
- 13087A 15 hp, 460 volt, three-phase squirrel-cage motor (not Design B energy efficient) has a table full-load current of 21 A. Using an inverse time breaker at its maximum percentage and the next-higher-size allowance, what breaker may be used?
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- 13090What is the maximum setting, under the basic table percentage, of an instantaneous trip breaker for a 10 hp, 460 volt, three-phase squirrel-cage motor with a table full-load current of 14 A?
- 13091A motor has a nameplate full-load current of 24 A and a marked service factor of 1.15. What is the maximum rating of a separate overload device under 430.32(A)(1)?