If a "hot” wire contacts a grounded enclosure, a ground fault results which normally will trip a circuit breaker or blow a fuse.

Using GFCI is one method to overcome grounding and insulation deficiencies.

Whenever the amount “going” differs from the amount “returning” by approximately , the GFCI interrupts the electric power within as little as 1⁄40 of a second.

Hazards are created when cords, cord connectors, receptacles, and cord- and plug-connected equipment are improperly used and maintained.

A flexible cord may be damaged by .

When a cord connector is wet, hazardous leakage can occur to the equipment grounding conductor

When the grounding conductor has a low enough resistance, no shock should be perceived.

OSHA ground-fault protection rules and regulations have been determined necessary and appropriate for employee

Receptacles on the ends of extension cords are not part of the permanent wiring and, therefore, must be protected by GFCIs whether or not the extension cord is plugged into permanent wiring.

When this leakage exceeds 5 mA ± 1 mA, the GFCIs interrupt the current.

OSHA requires that a written description of the employer’s assured equipment grounding conductor program, including the specific procedures adopted, be kept at the jobsite.

These tests are required before first use, after any repairs, after damage is suspected to have occurred, and at three-month intervals.