Wiring design and protection.
1926.404(b)Branch circuits –
1926.404(b)(1)Ground-fault protection –
1926.404(b)(1)(iii)(C)Each cord set, attachment cap, plug and receptacle of cord sets, and any equipment connected by cord and plug, except cord sets and receptacles which are fixed and not exposed to damage, shall be visually inspected before each day’s use for external defects, such as deformed or missing pins or insulation damage, and for indications of possible internal damage. Equipment found damaged or defective shall not be used until repaired.
HAZARD: Employees exposed to electrical shock/path to ground hazards.
ABATEMENT: Take any and all equipment with missing ground pins out of service.
Subpart K– Electrical
 Wiring design and protection.
1926.404(b)(1) Ground-fault protection –
1926.404(b)(1)(iii)(D) The following tests shall be performed on all cord sets, receptacles which are not a part of the permanent wiring of the building or structure, and cord- and plug-connected equipment required to be grounded:
1926.404(b)(1)(iii)(D)(1) All equipment grounding conductors shall be tested for continuity and shall be electrically continuous.
HAZARD: Employees exposed to electrical shock/fire hazards.
ABATEMENT: Broken off ground pin must be removed from the GFCI extension cord set and the GFCI must be tested for continuity to be electrically continuous.