A single phase 208 VAC circuit has 2 hot wires, the third is the?

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 $25.99Unlock all

Prepare for the New York City Refrigeration License Exam I. Utilize flashcards, multiple-choice questions, and detailed explanations to boost your readiness. Ace your licensing exam!

Multiple Choice

A single phase 208 VAC circuit has 2 hot wires, the third is the?

Explanation:
In a single-phase 208 VAC setup, you get the voltage from two hot conductors coming from different phases. The third conductor is the grounding conductor. Its purpose is safety: it bonds the equipment frame to earth and provides a low-impedance path for fault current so protective devices trip. A neutral is only used if you need a 120 V circuit from the same supply; a pure 208 V single-phase circuit doesn’t require neutral. The two hot wires are the supply, and one would not call one of them the third conductor—the third conductor is specifically the ground.

In a single-phase 208 VAC setup, you get the voltage from two hot conductors coming from different phases. The third conductor is the grounding conductor. Its purpose is safety: it bonds the equipment frame to earth and provides a low-impedance path for fault current so protective devices trip. A neutral is only used if you need a 120 V circuit from the same supply; a pure 208 V single-phase circuit doesn’t require neutral. The two hot wires are the supply, and one would not call one of them the third conductor—the third conductor is specifically the ground.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy