Max power supply for power-limited circuits (Class 1)?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the NCCER 33108 Limited-Energy Cabling Exam. Utilize flashcards and multiple-choice questions, complete with hints and detailed explanations. Ace your exam with confidence!

Multiple Choice

Max power supply for power-limited circuits (Class 1)?

Explanation:
Power-limited circuits, labeled Class 1, are restricted by two energy caps: the maximum voltage and the maximum apparent power. The standard sets these limits at 30 volts and 1,000 volt-amps. Keeping both of these within the specified tops ensures the energy the circuit can deliver stays low enough to reduce shock and fire hazards. So the highest rating a power supply for Class 1 circuits can have is 30 V with up to 1,000 VA. Using a supply that exceeds either limit would push the circuit outside Class 1 requirements. The other options violate one of these maximums (lower voltage or lower VA), so they are not the true maximum for Class 1.

Power-limited circuits, labeled Class 1, are restricted by two energy caps: the maximum voltage and the maximum apparent power. The standard sets these limits at 30 volts and 1,000 volt-amps. Keeping both of these within the specified tops ensures the energy the circuit can deliver stays low enough to reduce shock and fire hazards. So the highest rating a power supply for Class 1 circuits can have is 30 V with up to 1,000 VA. Using a supply that exceeds either limit would push the circuit outside Class 1 requirements. The other options violate one of these maximums (lower voltage or lower VA), so they are not the true maximum for Class 1.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy