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#96043 - 11/01/05 03:41 PM EGC attachment
gserve Offline
Member

Registered: 03/11/03
Posts: 92
I have a situation where a EGC will not fit on the neutral bar in the service equipment. I have tried to find a listed and same manufacturer add-on grounding lug kit to no avail.Except for the article 110 listing requirement issue is there anything wrong with installing a bolt-on lug of proper size and bolting it to the side of the panel with a nut and bolt? Code references please. Thanks

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#96044 - 11/01/05 05:10 PM Re: EGC attachment
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6805
Loc: Brick, NJ USA
Greg:
I don't have the bible handy, but...
Common practice around these parts has been:

Drill enclosure, as required.
Remove paint from enclosure.
Mount suilable size lug.
Bolt, nut, flat and STAR washers.
(Internal/external lockwashers)

John
_________________________
John

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#96045 - 11/01/05 11:33 PM Re: EGC attachment
macmikeman Offline
Member

Registered: 07/16/02
Posts: 718
Loc: Honolulu, Hawaii
Yep, and just remember EGC- ok, GEC-not ok, must be bonded to the grounded conductor at the service.

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#96046 - 11/02/05 12:32 AM Re: EGC attachment
e57 Offline
Member

Registered: 05/27/03
Posts: 2837
Loc: S.F.,CA USA
What size ECG is this? Many panels over the last ten years or so will accept #14 -#4 in every hole. The hole might look too small, but break out the inspection mirror and look real close, or look at the label for the ratings. You might be surpized to find it might fit. If not you can bolt just about any add-on lug, or bar, in the method John described for EGC.
_________________________
Mark Heller
"Well - I oughta....." -Jackie Gleason

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#96047 - 11/19/05 09:24 AM Re: EGC attachment
Paul O'Connell Offline
Member

Registered: 07/02/05
Posts: 57
Loc: Allen Park, Mi. USA
I would drill and tap a hole in the panel and mount a lug. As long as the neutral is bonded to the enclosure properly it should be sufficient. Don't listen to sanding the paint off the panel. This is not required and in fact in itself a violation of the code.

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#96048 - 11/19/05 09:29 AM Re: EGC attachment
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
Paul,
 Quote:
Don't listen to sanding the paint off the panel. This is not required and in fact in itself a violation of the code

When is the last time you read 250.12????
Don
_________________________
Don(resqcapt19)

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#96049 - 11/19/05 09:44 AM Re: EGC attachment
Paul O'Connell Offline
Member

Registered: 07/02/05
Posts: 57
Loc: Allen Park, Mi. USA
Don

When was the last time you read 300.6 Protection from Corrosion, or the other articles that require that paint protecting the enclosure. Possibly you require the removal of the Neutral bus and the paint sanded off although the UL listing and the code approves bonding through a screw and a tapped hole as long as it is not a sheet metal screw.

Paul

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#96050 - 11/19/05 11:04 AM Re: EGC attachment
Roger Offline
Member

Registered: 05/18/02
Posts: 1779
Loc: N.C.
Paul, if your fitting or attachment is designed to penetrate the coating or paint that is required by 300.6, then you are correct, if not, 250.12 trumps 300.6.

If you don't agree with this, then the two article sections are in contradiction of each other, and I would choose to violate 300.6 and go with 250.12.

Remember a threaded hole is not required for this attachment, it is simply a preference, a bolt and nut can be used.

Roger

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#96051 - 11/19/05 11:54 AM Re: EGC attachment
earlydean Offline
Member

Registered: 12/22/03
Posts: 749
Loc: Griswold, CT, USA
In my opinion all of you are flirting with disaster.

Most panels are not made of cans with thick enough metal to take the required two full threads when tapped.

Removing the paint to attach a lug is dangerous for the stated reason, and, the unreliablity of field installed lugs. (What nationally recognized testing labroratory has tested these connections and has detailed the steps to follow?)

The only grounding connections I would approve are the neutral or ground bus, the supplemental grounding bus kit (installed in the pre-formed holes, using the included self-tapping screws) or a grounding bushing.
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Earl

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#96052 - 11/19/05 12:44 PM Re: EGC attachment
e57 Offline
Member

Registered: 05/27/03
Posts: 2837
Loc: S.F.,CA USA
IMO after removing the paint for the required non resistive connection, you should hit the bare ferrous surface with this, or something like it after making your connection.



A rusty connection is just as resistive as a painted surface.
_________________________
Mark Heller
"Well - I oughta....." -Jackie Gleason

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