Imagine this situation: The house is closed in, with a panel mounted in the mechanical room. A short piece of pipe exits the panel, to a stud-mounted box with an "industrial" or "exposed" type cover.
This install could very well be part of the permanent structure, and not temporary at all. The construction crews are simply using an existing receptacle.
That can happen and does happen.
However each contractor plugging into that outlet is required by OSHA to have GFCI protection. The use a GFCI cord set is a work around.
If caught breaking this rule the fine will be against the offending persons employer.
It will not (or should not ) be against the EC for installing an outlet that is part of the permanent wiring.
BTW that rule applies to us ECs as well, if we plug an extension cord into that non GFCI outlet we have to use a GFCI cord set.
[This message has been edited by iwire (edited 07-11-2006).]