Power sources for Class 2 or Class 3 circuits may be derived from ________.
A) A listed or labeled Class 2 or Class 3 power supply or transformer
B) Any inherently limited power supply
C) Any power supply having a maximum output of 100VA
D) Any power supply 150V or less

Question

Quizplus · Accepted Answer

Class 2 and Class 3 power sources must be listed or labeled as such and be limited to a certain amount of power output. Any power supply or transformer used for these circuits must also be listed or labeled as Class 2 or Class 3. Therefore, only option A is a valid power source for Class 2 or Class 3 circuits.

Power Sources for Class 2 or Class 3 Circuits May