Re: Supply pipe bonding -- IAEI-Michigan

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Date Posted: 21:40 03/27/07 Tue
Author: George Little (George Little)
Subject: Re: Supply pipe bonding
In reply to: Rick Bowling 's message, "Supply pipe bonding" on 14:23 09/12/06 Tue

>I'm a private home inspector and just looked at a new
>construction home which is plumbed mostly with
>non-conductive PEX piping but has copper risers.
>
>I'm wondering what you folks think about the
>applicability of the bonding requirements (E3509.6,
>etc.)for metal water piping in this scenario. There is
>at least one place where NM runs accross one of the
>copper risers.

The MRC (Michigan Residential code) at E3509.6 and the NEC (National Electrical Code) at 250.104(A) both talk about the need to bond "water piping systems" and how to do it. I don't think that the short pieces of metal piping constitute a "water piping system" and I don't think they are "likely to become energized" so I do not ask for any bonding. IMHO

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>>I'm a private home inspector and just looked at a new >>construction home which is plumbed mostly with >>non-conductive PEX piping but has copper risers. >> >>I'm wondering what you folks think about the >>applicability of the bonding requirements (E3509.6, >>etc.)for metal water piping in this scenario. There is >>at least one place where NM runs accross one of the >>copper risers. > >The MRC (Michigan Residential code) at E3509.6 and the >NEC (National Electrical Code) at 250.104(A) both talk >about the need to bond "water piping systems" and how >to do it. I don't think that the short pieces of metal >piping constitute a "water piping system" and I don't >think they are "likely to become energized" so I do >not ask for any bonding. IMHO

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