Question 13111 of 790 · California General Electrician Exam
A branch circuit supplies 30 A of continuous load and 20 A of noncontinuous load. What is the minimum standard overcurrent device rating?
Exactly one answer is correct.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
Correct answer to question 13111
- C: 60 A
Explanation
The minimum is 125 % of the continuous load plus 100 % of the noncontinuous load: 30 x 1.25 + 20 = 57.5 A, so the next standard size is 60 A. Applying 125 % to the whole 50 A gives 62.5 A, which is not a standard size and leads to 70 A.
More questions: Electrical Calculations
- 13112What is the maximum continuous load permitted on a 20 A branch circuit protected by a standard (not 100 % rated) breaker?
- 13113What is the maximum continuous lighting load in volt-amperes on a 277 volt, 20 A branch circuit?
- 13114How many 277 volt LED luminaires drawing 0.75 A each may be connected to a 20 A branch circuit if they operate continuously?
- 13115A three-phase feeder supplies 120 A of continuous load and 40 A of noncontinuous load. What is the minimum standard overcurrent device rating?
- 13116A 24 A continuous load is supplied by a branch circuit. What is the minimum overcurrent device rating and minimum copper conductor size with 60 °C terminations?
- 13118A single-phase 240 volt, 10 kW heater operates for 3 hours. How many kilowatt-hours does it use, and what is its current?