If you are in construction you are required to be protected by GFCIs and as Roger said one way to comply is with GFCI cords, we usually use a 18" to 24" GFCI cord that we plug the long cords into.
Here are some quotes from a Leviton pdf.
GFCI Protection: A must on the job site
Nowhere is GFCI protection more needed than on construction, renovation and demolition job sites. There is a wide variety of power tools with easily damaged flexible power cords, plus the likelihood of damp and wet conditions. Both OSHA and the NEC require GFCI protection for all temporary and permanent power systems used on these job sites.
OSHA (Occupational Safety and Health Administration) Regulation 29 CFR 1926.404(b) Branch Circuitsâ€”
(1) Ground-fault protection - (i) General
â€śThe employer shall use either ground fault circuit interrupters as specified in paragraph (b)(1)(ii) of this section or an assured equipment grounding conductor program as specified in paragraph (b)(1)(iii) of this section to protect employees on construction sites. These requirements are in addition to any other requirements for equipment grounding conductors.â€ť
GFCI Cordsets Must Have Open-Neutral Protection Open-Neutral Protection immediately trips the GFCI if the neutral conductor on the line side is opened. This eliminates the possibility of the GFCI Cordset delivering power to the load if
the GFCI cannot trip in the event of a ground fault. Open Neutral Protection requires the addition of special components to the standard GFCI circuitry. Permanently-wired GFCI receptacles do not require this feature because their line-side conductors are not exposed to physical damage. In all temporary power situations, where flexible cord feeds the line side of a GFCI, there is always the risk of an open-neutral condition. Therefore, UL requires open-neutral protection for all Class A GFCI cordsets.
If you get an OSHA inspection at your construction site and you are not using GFCIs you will very likely receive a large fine.
[This message has been edited by iwire (edited 08-05-2004).]