Don't feel like the Lone Ranger lamplighter. There are a lot of contractors who aren't aware of the existence of the MRC. When I gave my code update class last year, I covered it and many of the electricians in the room had never seen one of them. There are very few places in it which differ from the NEC, and most of the differences occur in wording, not intent (though there are a few places where the actual requirements are different). If there was a prohibition against the methods in 406.3(D)(3), it would be in the Part 8 rules, (not the MRC) and there simply isn't. And, as Renosteinke stated, even if there were they can't be made retro-active. So if ungrounded receptacles on ungrounded branch circuits were code compliant when installed, 406.3(D)(3) can be used.
[This message has been edited by Mvannevel (edited 11-18-2005).]
