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-Bathroom Ground- #120981
06/02/05 11:10 PM
06/02/05 11:10 PM
electure  Offline
OP
Member
Joined: Dec 2000
Posts: 4,264
Fullerton, CA USA
I discovered this one during a bath remodel.

Under the lavatory, buried in the wall-


[Linked Image]


The conductor was spliced with a barrel crimp to 4 conductors above the ceiling, and the 4 wires were attached to the boxes in this fashion-


[Linked Image]


The branch circuit was supplied by this NM cable, containing a #16 ground wire, which was connected in the usual manner at the panel-


[Linked Image]


What do ya' think?




[This message has been edited by electure (edited 06-03-2005).]

Tools for Electricians:
Re: -Bathroom Ground- #120982
06/02/05 11:25 PM
06/02/05 11:25 PM
L
Larry Fine  Offline
Member
Joined: Feb 2005
Posts: 693
Richmond, VA
Homestly, I think it's one of the better-done retro-grounding jobs I've seen. At least the nut and bolt were used for no ther purpose.


Larry Fine
Fine Electric Co.
fineelectricco.com
Re: -Bathroom Ground- #120983
06/02/05 11:27 PM
06/02/05 11:27 PM
S
stamcon  Offline
Member
Joined: Mar 2001
Posts: 330
So San Francisco CA
The ground strap is very common(original to the house)in the Bay Area, but I've only seen the reduced ground NM a couple of times.

steve


Steve
Re: -Bathroom Ground- #120984
06/03/05 08:29 AM
06/03/05 08:29 AM
M
mamills  Offline
Member
Joined: Nov 2001
Posts: 745
Wharton, Texas, USA
That's not a PLASTIC pipe in that first pic, is it? [Linked Image]

Mike (mamills)

Re: -Bathroom Ground- #120985
06/03/05 07:21 PM
06/03/05 07:21 PM
N
n1ist  Offline
Member
Joined: Feb 2002
Posts: 183
Malden MA
Looks like 1/2" copper to me...
/mike

Re: -Bathroom Ground- #120986
06/03/05 10:38 PM
06/03/05 10:38 PM
electure  Offline
OP
Member
Joined: Dec 2000
Posts: 4,264
Fullerton, CA USA
Yes, it's 1/2" copper, and cast iron drain with really-by-golly lead and oakum joints.

This house was custom built in 1958. This is original as installed.

Re: -Bathroom Ground- #120987
06/03/05 11:40 PM
06/03/05 11:40 PM
S
sandsnow  Offline
Member
Joined: Sep 2004
Posts: 167
Irvine, CA, USA
Hey Dude!!!
What were you doing in my house????
My place was done pretty much the same way.
See here https://www.electrical-contractor.net/ubb/Forum5/HTML/000871.html

The ground was attached by the same type of clamp to the local water line in the bathroom and then around the nail for the box.


Larry LeVoir
Inspector
City of Irvine, CA
Re: -Bathroom Ground- #120988
06/04/05 03:36 AM
06/04/05 03:36 AM
Trumpy  Offline

Member
Joined: Jul 2002
Posts: 8,231
SI,New Zealand
I'd be interested to see how connections like this would actually carry the high fault current that they are supposed to. [Linked Image]
What sort of filler is that, in that piece of NM cable?.
It looks like it would burn pretty readily. [Linked Image]

Re: -Bathroom Ground- #120989
06/04/05 01:47 PM
06/04/05 01:47 PM
E
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
Wasn't the cold water allowed to be used as a GEC/EGC up until prior to '93 NEC? When did the 5' rule come up for point of connection to water? It was the way it was done for a while, not sure when that 'while' was though. It seems 40's- 60's.

Trumpy, that filler is craft paper, still used in romex, and other cables.


Mark Heller
"Well - I oughta....." -Jackie Gleason
Re: -Bathroom Ground- #120990
06/04/05 04:08 PM
06/04/05 04:08 PM
Alan Belson  Offline
Member
Joined: Mar 2005
Posts: 1,803
Mayenne N. France
I remember dad using that cast-iron pipe. To seal it they rammed tow (oakum) and boss-white, (a mix of powdered chalk and linseed oil), in the annulus, followed by lead-wool hammered in with a wooden spoke. Another American pipe used in the UK at that time (late forties) was made of paper-pulp and molten tar,(made in a vacuum), with the ends taper machined. It was brilliant- light, strong & supple with foolproof joints- just hammered together with a dolly. Then upvc arrived.
Alan


Wood work but can't!
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