Inspector Qualifications

DOE-HDBK-1092-98

6.3.6.2 INSPECTOR QUALIFICATIONS

Inspectors should meet the requirements of ANSI/ASME QEI-1 and be recognized by the local

enforcing authority. Repair and maintenance personnel should be qualified elevator mechanics.

6.4 PORTABLE AND VEHICLE-MOUNTED GENERATORS

Using portable and vehicle-mounted generators to operate electric tools on job sites is permitted

under specific conditions by both NEC Section 305-6 and 29 CFR 1926.404(f)(3).

However, OSHA inspections have disclosed a potentially serious hazard resulting from the use of

portable generators. Both OSHA and the NEC permit the use of two-wire, single-phase generators

of not more than 5,000 W "where the circuit conductors of the generator are insulated from the

generator frame and all other grounded surfaces." Under these conditions, neither the receptacles,

cord sets, nor tools need to be protected by GFCIs or an assured equipment grounding conductor

program. This exception from using GFCIs is granted because with an insulated (isolated) circuit,

there is no dangerous current flow from the generator-fed conductors to ground, structural steel, or

any other grounded object. However, the use of GFCI devices is still recommended.

If the circuit conductors are not isolated, however, the shock hazard would be the same as with any

other electrical source and the exemption does not apply.

All portable electric generators that supply 15-or 20-A, 120-V receptacles and that are in use or are

available for use on construction sites shall meet all the following conditions or be used only with

either GFCIs or an assured equipment grounding conductor program.

1. They must be rated not more than 5 kW.

2. They shall have only a two-wire circuit (i.e., only 120-V output).

3. They shall have both circuit conductors insulated from the frame and all other grounded

surfaces.

See NEC Section 250-6 and Figure 6-3.

6.5 BATTERIES

Storage batteries are considered a live source and appropriate precautions should be taken when

working around them.

6.5.1 SURROUNDING SPACE

Adequate space should be provided around storage batteries for safe inspection, maintenance,

testing, and cell replacement. Space shall be left above cells to allow for operation of lifting

equipment when required, for addition of water, and for taking measurements.

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