Question 8006 of 731 · Texas Journeyman Electrician Exam
A motor is marked with a temperature rise of 40 degrees C. What overload rating is permitted as a percentage of nameplate current?
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 8006
- C: 125 percent
Explanation
Section 430.32(A)(1) groups motors with a marked temperature rise of 40 degrees C or less with motors having a service factor of 1.15 or more. Both may have overloads sized at 125 percent of nameplate current.
More questions: Motors, HVAC, Generators and Transformers
- 8007A motor has a service factor of 1.0 and no temperature rise marking. What is the maximum overload rating?
- 8008A motor with a service factor of 1.0 has a nameplate current of 20 A. What is the maximum separate overload setting under 430.32(A)(1)?
- 8009The overload selected at 125 percent is not enough to start a motor with a service factor of 1.15. What is the highest rating the next step permits?
- 8010How many overload units are required for a three-phase ac motor?
- 8011What is the maximum rating of an inverse time breaker used as motor branch-circuit short-circuit and ground-fault protection for a standard squirrel cage motor?
- 8012What is the maximum rating of a dual-element time-delay fuse used as motor branch-circuit short-circuit and ground-fault protection?