OSHA requires ground fault protection on construction job sites under 29 CFR 1926.404(b)(1). Employers must provide either GFCI protection or an assured equipment grounding conductor program for all 120-volt, single-phase, 15- and 20-amp receptacle outlets that are not part of the permanent wiring of a building or structure and are used by employees. GFCIs are designed to trip when ground-fault current is approximately 4 to 6 milliamps, reducing the risk of electric shock.
What is the OSHA requirement for GFCIs on job sites?
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