Electrical Safety – GFCI

Ground-Fault Circuit-Interrupter (GFCI) Protection

NFPA 70 110.10 GFCI – Standard for Electrical Safety in the Workplace

Ground-fault circuit interrupter. A device for the protection of personnel that functions to de energize a circuit or portion thereof within an established period of time when a current to ground exceeds some predetermined value that is less than that required to operate the overcurrent protective device of the supply circuit.

(A) General. Employees shall be provided with ground-fault circuit-interrupter protection where required by applicable state, federal, or local codes and standards. Listed cord sets or devices incorporating listed GFCI protection for personnel identified for portable use shall be permitted.

(B) Maintenance and Construction. GFCI protection shall be provided where an employee is using cord sets (extension cords) or cord- and plug-connected tools related to maintenance and construction activity supplied by 125-volt, 15, 20, or 30 amp circuits. Where employees operate or use equipment supplied by greater than 125-volt, 15, 20, or 30 amp circuits, GFCI protection or an assured equipment grounding conductor program shall be implemented.

(C) Outdoors. GFCI protection shall be provided when an employee is outdoors and operating or using extension cords or plug-connected equipment supplied by 125-volt, 15, 20, or 30 amp circuits. Where employees operate or use equipment supplied by greater than 125-volt, 15, 20, or 30 amp circuits, GFCI protection or an assured equipment grounding conductor program shall be implemented.

(D) Testing GFCI Protection Devices. GFCI protection devices shall be tested in accordance with the manufacturer’s instructions.

29 CFR 1926.449 OSHA Construction Regulations.

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