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Ground wire question

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Subject Author Date
Ground wire question Ivan Vegvary 08-14-2007
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Posted by Ivan Vegvary on August 14, 2007, 2:24 pm
My old home (50's) has, for the main part, no ground wires running to the
outlets. The wiring is romex, but, only a hot and a neutral except where I
have added additional outlets.
The previous owner has placed three hole (grounded) outlets on many of the
two wire circuits. I know that is not to code and should be converted back
to groundless plugs.

Question: Can I simply run separate ground wires to these outlets. Almost
all of the wiring reaches these outlets via the attic crawl space. Do I
need to make 'home runs' to each outlet or can I install splice boxes in the
attic and do radial runs from therein?

All advice or criticisms appreciated.

Thanks,
Ivan Vegvary



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Posted by Wayne Whitney on August 14, 2007, 2:44 pm

> Question: Can I simply run separate ground wires to these outlets.

Yes, as per NEC 250.134(B) exception #1. You can access the 2005 NEC
online through a java applet via:
<http://www.nfpa.org/freecodes/free_access_agreement.asp?id=7005SB>

> Do I need to make 'home runs' to each outlet or can I install splice
> boxes in the attic and do radial runs from therein?

Home runs are not required. For a retrofit application like this, you
could daisy chain all the equipment grounding conductors (EGC) in a
single run.

Cheers, Wayne

Posted by John JJ on August 23, 2007, 10:04 am
wrote:

I have the same problems with a 50's house. Can you give more detail
how to retrofit daisy chain and especially where to buy the grounding
conductors (ESG).

Thanks

>Home runs are not required. For a retrofit application like this, you
>could daisy chain all the equipment grounding conductors (EGC) in a
>single run.
>
>Cheers, Wayne

Posted by sym on August 15, 2007, 5:55 pm
> My old home (50's) has, for the main part, no ground wires running to the
> outlets. The wiring is romex, but, only a hot and a neutral except where I
> have added additional outlets.
> The previous owner has placed three hole (grounded) outlets on many of the
> two wire circuits. I know that is not to code and should be converted back
> to groundless plugs.
>
> Question: Can I simply run separate ground wires to these outlets. Almost
> all of the wiring reaches these outlets via the attic crawl space. Do I
> need to make 'home runs' to each outlet or can I install splice boxes in the
> attic and do radial runs from therein?
>
> All advice or criticisms appreciated.
>
> Thanks,
> Ivan Vegvary

id do only the ones needed, most things dont have a ground prong
anyways, computer, fridge strove, washer thats probably about it. most
of those have a metal shell is why they are grounded.


Posted by SRN on August 17, 2007, 5:32 pm

> My old home (50's) has, for the main part, no ground wires running to the
> outlets. The wiring is romex, but, only a hot and a neutral except where
> I have added additional outlets.
> The previous owner has placed three hole (grounded) outlets on many of the
> two wire circuits. I know that is not to code and should be converted
> back to groundless plugs.
>
> Question: Can I simply run separate ground wires to these outlets.
> Almost all of the wiring reaches these outlets via the attic crawl space.
> Do I need to make 'home runs' to each outlet or can I install splice boxes
> in the attic and do radial runs from therein?
>
> All advice or criticisms appreciated.
>
> Thanks,
> Ivan Vegvary

See NEC 2005 250.130C & 250.130C
http://www.nfpa.org/freecodes/free_access_agreement.asp?id=7005SB



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