What is a Ground-Fault Circuit Interrupter (GFCI) and what does it do?

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

Study for the Low Voltage Qualification Test. Explore flashcards and multiple-choice questions with hints and explanations for each, ensuring thorough preparation!

Multiple Choice

What is a Ground-Fault Circuit Interrupter (GFCI) and what does it do?

Explanation:
A GFCI monitors the current in the hot and the return path (neutral) and expects them to be equal. If some current leaks, typically through a person or through a fault to ground, the currents become unbalanced. The GFCI detects this small imbalance and quickly trips to interrupt the circuit, reducing the risk of electric shock. This protective action is specifically about ground-fault leakage, not about handling short circuits, reducing harmonic distortion, or stabilizing voltage. That’s why the correct description is that it trips when it detects a current imbalance between hot and neutral. GFCIs are commonly used in wet or outdoor areas to improve safety.

A GFCI monitors the current in the hot and the return path (neutral) and expects them to be equal. If some current leaks, typically through a person or through a fault to ground, the currents become unbalanced. The GFCI detects this small imbalance and quickly trips to interrupt the circuit, reducing the risk of electric shock. This protective action is specifically about ground-fault leakage, not about handling short circuits, reducing harmonic distortion, or stabilizing voltage. That’s why the correct description is that it trips when it detects a current imbalance between hot and neutral. GFCIs are commonly used in wet or outdoor areas to improve safety.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy