Final answer:
A class 3 power supply must not exceed 30 volts and 1,000 VA. The correct answer to the question is 30V, 100VA.
Step-by-step explanation:
A class 3 power supply as per the UL standard 1310 must have a power output that does not exceed 30 volts and 1,000 volt-amps (VA). This information helps us identify the correct answer to the question provided: A power-limited class 3 power supply must never exceed 30V, 100VA. This answer is important to know for safety and compliance standards when designing or using electrical devices and systems.