Question

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

Answer 1

Power sources for class 2 or class 3 circuits include listed or labeled power supplies, inherently limited power supplies, power supplies with a maximum output of 100VA, and power supplies with a voltage of 150V or less. The correct answer is D. Any power supply 150V or less.

Step-by-step explanation:

Power sources for class 2 or class 3 circuits may be derived from:

1. A. A listed or labeled class 2 or class 3 power supply or transformer: These power supplies or transformers have been tested and certified to meet the safety requirements for class 2 or class 3 circuits.
2. B. Any inherently limited power supply: These power supplies are designed with built-in safety features to prevent excessive current flow.
3. C. Any power supply having a maximum output of 100VA: This ensures that the power supply does not exceed the maximum allowable power output for class 2 or class 3 circuits.
4. D. Any power supply 150V or less: This limit ensures that the voltage supplied to class 2 or class 3 circuits is within a safe range.