Question 10083 of 790 · California General Electrician Exam
A transformer arc welder has a rated primary current of 50 amperes and a 50 percent duty cycle. The I1eff value is not marked. Using a duty cycle multiplier of 0.71, what is the minimum supply conductor ampacity?
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 10083
- C: 35.5 amperes
Explanation
When I1eff is not given, the supply conductor ampacity is the rated primary current multiplied by the duty cycle factor: 50 A x 0.71 = 35.5 A. Applying a 125 percent factor here is a typical error.
More questions: Special Equipment, Pools, PV and EV
- 10084The OCPD for an arc welder may be rated at not more than what percentage of the rated primary current (I1max)?
- 10001Each commercial building and occupancy accessible to pedestrians must have at least one outlet for sign or outline lighting at each tenant entrance. What branch circuit must supply it?
- 10003What does Article 600 require of the disconnecting means for a sign?
- 10004Which statement about fixed electric signs is correct?
- 10005What is required of the main disconnecting means for an elevator?
- 10009When may an information technology equipment room use the special provisions of Article 645?