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Re: Grounding rebar

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I have refrained from answering this question...I forwarded the OP to a guy I know who is an NEC expert.  I've learned on a lot from him over the years.

So until I get the answer from my expert.........

Here's my not so expert answer..

You are "allowed" to  use the rebar in a foundation as  a grounding system.   It is one of one of the several systems allowed by the NEC but you are not "required" to ground to the rebar OR ground the rebar.

When I get the correct answer I'll post it.


On 8/23/07, Paul Blomberg < paul.blomberg(--nospam--at)> wrote:
There is no structural requirement to electrically ground rebar but there may be an electrical reason to do it.  I usually grounded rebar for FAA type lightning protection and in nuclear power plants.  Grounding is a pain as the initial ground is cad welded to a bar and then the electrical connection to the rest is by physical bar to bar contact with the tie wire binder.  We ended up meggering each bar to ground to make sure we had electrical contact.
I'd like to hear what section of the NEC directs the grounding of foundation rebar.
Phoenix, AZ

On 8/23/07, Greene, Al [PTS] <AGFO(--nospam--at) > wrote:

Is there a code requirement that says that rebar in a slab or footing has to be grounded?  I have an electrical engineer telling me NEC says so.

Al Greene, PE, SECB
Chevron Richmond Refinery
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Richmond, CA 94802
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