Generally, GFCI protection is not required by the NEC on a retroactive basis.
Where there is an employee exposure to potential line-to-ground shock hazards,
GFCI protection should be provided. This is especially important in work areas
where portable electrical equipment is being used in wet or damp areas in contact
with earth or grounded conductive surfaces.
Temporary wiring that is being used on a permanent basis should be replaced
with fixed wiring. Conduit and/or cable systems must be protected from damage
by vehicles or other mobile equipment. All fittings and connections to junction
boxes and other equipment must be secure. No exposed wiring can be allowed. Check
for missing knockouts and cover plates. Jerry-rigged splices on flexible cords
and cables should be correctly repaired. Electrical equipment should be installed
in a neat and professional manner. Check for damaged insulation on flexible cords
and pendant drop cords.
