Question 8009 of 731 · Texas Journeyman Electrician Exam
The 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?
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 8009
- C: 140 percent of nameplate current
Explanation
Section 430.32(C) allows the next higher overload size when the normal setting will not let the motor start or carry the load. The limit is 140 percent for motors with a service factor of 1.15 or more or a 40 degree C rise, and 130 percent for all others.
More questions: Motors, HVAC, Generators and Transformers
- 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?
- 8013What is the maximum rating of a nontime delay fuse used for motor branch-circuit short-circuit and ground-fault protection?
- 8014What is the maximum setting of an instantaneous trip breaker for a squirrel cage motor other than Design B energy efficient?
- 8015The calculated motor short-circuit protection value does not match a standard size. What does 430.52 permit?