Re: Replacement receptacles -- IAEI-Michigan

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Date Posted: 15:48 08/10/07 Fri
Author: George Little
Subject: Re: Replacement receptacles
In reply to: Hal Richmond 's message, "Replacement receptacles" on 08:44 08/09/07 Thu

>The Michigan electrical code would allow the
>installation of a GFCI type receptacle in lieu of
>having to replace a three wire type that is not
>grounded. The Michigan residential code has no
>provisions for this allowance and in the appendix
>there is specific language that three wire receptacles
>must be grounded or replaced with a two-wire type. Am
>i correct in understanding that here in Michigan we
>are no longer allowed to install a GFCI device to
>protect a three-wire receptacle that is not grounded
>and these must be grounded or replaced with a two-wire
>type??
Hal You are entirely correct that the Michigan Residential Code (which is a spin on the International Residential Code does not permit us to install a 2 wire with ground receptacle unless we ground the "grounding" terminal. The NEC permits this if the circuit is protected with a GFCI device but the MRC and the IRC do not. Here is the wording out of the '06 IRC:
3. For replacement of nongrounding-type receptacles
with grounding-type receptacles and for branch circuits
that do not have an equipment grounding conductor
in the branch circuitry, the grounding
conductor of a grounding type receptacle outlet shall
be permitted to be grounded to any accessible point on
the grounding electrode system, or to any accessible
point on the grounding electrode conductor, as
allowed and described in Chapters 33 through 42.

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