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#24729 - 04/22/03 12:04 AM GFCI  
LK  Offline
Joined: Jan 2003
Posts: 1,429
New Jersey
When replacing an existing outlet with a GFCI the rules are no ground then no ground downstream. when there is a full size ground then connect all grounds. What is the accepted practice when a reduced size 16ga bare ground is connected. Do you open the ground connection, continue the ground downstream; or connect the reduced ground on all devices

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#24730 - 04/22/03 06:03 AM Re: GFCI  
zapped208  Offline
Joined: Feb 2003
Posts: 196
Somewhere in USA
I treat it like a full size ground, and attach to all devices.

Shoot first, apologize later.....maybe

#24731 - 04/22/03 09:57 AM Re: GFCI  
GEO  Offline
Joined: Mar 2003
Posts: 47
not sure of the question ? do you mean a/c (bx) cable , what type of boxes ? GEO

#24732 - 04/22/03 02:44 PM Re: GFCI  
Bill Addiss  Offline
Joined: Oct 2000
Posts: 3,878

Do you mean the smaller size ground wire that was in the older NM cables?

#24733 - 04/22/03 05:37 PM Re: GFCI  
HotLine1  Offline

Joined: Apr 2002
Posts: 6,853
Brick, NJ USA
In my opinion, a reduced size (wire guage) ground conductor is better than "no ground". The older NM cable had 16 gauge ground, and most of that cable was/is #14, for the hot and neutral conductors, and should be on a 15 amp OCP.

As an AHJ ion NJ, I would accept the undersized ground. For any arguments, I would fall back to "good old common sense", but as there is no NEC article for that, I would use the NJ "Rehab" Code out of the UCC (5:23 et al)



#24734 - 04/22/03 08:44 PM Re: GFCI  
LK  Offline
Joined: Jan 2003
Posts: 1,429
New Jersey
I find reduced grounds under cable clamps, twisted under sheet metal screws and pushed through holes in the box. None of these connections are good grounding practices.
When installing a GFCI I find it best to check all down stream ground connections.
It looks like everyone agrees reduced ground better then none at all.

#24735 - 04/22/03 09:38 PM Re: GFCI  
Steve T  Offline
Joined: Feb 2001
Posts: 306
Oak Park, IL, USA
Then of course a reduced ground will show a ground with your average tester, but may increase the resistance enough in the event of a fault to not trip the OCPD. In which case it would be better to mark the GFCI as "no equipment ground" so no one is deceived about the actual grounding ability of the circuit.

#24736 - 04/22/03 11:19 PM Re: GFCI  
LK  Offline
Joined: Jan 2003
Posts: 1,429
New Jersey
Good point this is why some type of marking should note the missing link. I have a problem finding a label NO EQUIPMENT GROUND the GFCI Mfg. should put them in the box. They have about 4 info sheets in there now.


#24737 - 04/23/03 06:48 AM Re: GFCI  
Redsy  Offline
Joined: Mar 2001
Posts: 2,056
Bucks County PA

Most GFCI manufacturers now include both labels in the box. (GFCI protected outlet, No equipment ground).

#24738 - 04/23/03 10:09 AM Re: GFCI  
rmiell  Offline
Joined: Nov 2000
Posts: 242
La Junta, Co. USA
In this situation, why is the existing (reduced) equipment grounding conductor better than none? The whole circuit is protected by a GFCI, which will trip faster than the breaker will, in the event of a ground fault. That is it's function. IMOI, I would think the reduced egc is equal to no egc. Don't use it.

If you are talking about a non-gfci protected circuit, then, yes the reduced egc is preferred to none.
Rick Miell

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