Back

GFCI Breaker Installation and Principles

medium 10 Questions
Question 1 of 10

What is the primary function of a single-pole GFCI breaker?

A GFCI breaker provides both overcurrent protection (like a standard breaker) and ground-fault protection to prevent electric shock.
Question 2 of 10

At what current imbalance does a standard GFCI breaker typically trip?

GFCI breakers monitor the balance between hot and neutral wires; an imbalance of 4-6 mA indicates a ground fault, triggering an instantaneous trip.
Question 3 of 10

Where must the white pigtail wire of a 1-pole GFCI breaker be connected?

The factory-attached white pigtail on a GFCI breaker must be connected directly to the panel's neutral busbar to provide a reference for the sensing circuitry.
Question 4 of 10

Which NEC article generally dictates GFCI requirements for dwellings?

NEC 210.8 specifies the requirements for GFCI protection in various locations, including bathrooms, garages, and outdoors.
Question 5 of 10

How many hot conductors does a 1-pole GFCI breaker monitor?

A 1-pole GFCI breaker is designed for 120V circuits and monitors one hot conductor (L1 or L2) and the neutral conductor.
Question 6 of 10

In a GFCI-protected circuit, where should the load-side neutral wire be terminated?

The load neutral must be connected to the GFCI breaker's specific neutral terminal so the device can monitor the current flowing back through the neutral.
Question 7 of 10

What is the standard voltage rating for the branch circuit protected by a 1-pole GFCI?

1-pole GFCI breakers are specifically designed for 120V branch circuits (line-to-neutral).
Question 8 of 10

If a GFCI breaker is replacing a standard breaker, what should you do with the grounding conductor?

The equipment grounding conductor (EGC) must always be terminated at the grounding busbar, independent of the GFCI's internal circuitry.
Question 9 of 10

What is the purpose of the 'TEST' button on a GFCI breaker?

The test button simulates a ground fault condition to ensure the internal mechanism that detects imbalances is functional.
Question 10 of 10

Which of the following locations typically requires GFCI protection per NEC 210.8?

Outdoor receptacles are explicitly listed in NEC 210.8(A) as requiring GFCI protection due to the potential for exposure to moisture.
1 / 10