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#124408 - 09/28/06 06:40 AM GEC to EMT Connectors
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Registered: 10/07/00
Posts: 3179
Loc: NY, USA
Quote:
Are there any listed connectors for a GEC in EMT or is the jury-rigged stuff that I keep seeing the only way to make this connection ? All the listed connectors are for rigid conduit . I have seen GEC out of the EMT threaded through the connector at steel or the rod and then back to the EMT to a pipe clamp.

( At this point I'm almost ready to say all conduit raceways for GEC should be Non metallic or if the wire is large enough to just leave it with out conduit. I think that is what Soares stated 75 years ago. )

Comments welcomed.
- Alan Nadon





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#124409 - 09/28/06 07:46 AM Re: GEC to EMT Connectors
JJM Offline
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Registered: 10/31/05
Posts: 102
That's one of the reasons why I go with rigid if protection is required by the AHJ for a GEC or bonding jumper... hate the jury-rigged stuff and rigid isn't all that terrible to bend.



Though the jury-rigged methods are common and do pass, what about neat and workman like?

Maybe it's time someone invents something better for EMT... assuming it doesn't already exist. All I've seen is what you see.

Joe

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#124410 - 09/28/06 08:25 AM Re: GEC to EMT Connectors
renosteinke Offline
Cat Servant
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Registered: 01/22/05
Posts: 5305
Loc: Blue Collar Country
JJM, that is the connector I use on EMT- together with an EMT connector, of course!

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#124411 - 09/28/06 10:41 AM Re: GEC to EMT Connectors
Gus99 Offline
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Registered: 08/11/05
Posts: 26
Loc: Los Angeles, CA
Actually I would consider the two photo examples to be "neat and workman" like. The Romex clamp is a nice solution. Now if the ground wire just exited the raw conduit I would consider that a bit sloppy but it would still probably pass.

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#124412 - 09/28/06 11:30 AM Re: GEC to EMT Connectors
mxslick Offline
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Registered: 10/24/04
Posts: 785
Loc: Atomic City, ID USA
Look closely at the left of the second pic..it seems that the screw for the strap is not driven all the way in. Violation?
_________________________
Stupid should be painful.

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#124413 - 09/28/06 09:19 PM Re: GEC to EMT Connectors
Lostazhell Offline
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Registered: 02/21/04
Posts: 1248
Loc: Bakersfield, CA (Originally Or...
Even though there is obviously substantial metal to metal contact with the bare copper ground inside the EMT, The EMT must still be bonded by a listed means... Are those 2 screw connectors listed for this purpose?

I've used the clamp in JJM's post with an EMT connector before with no complaints from AHJ's

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#124414 - 09/29/06 05:27 AM Re: GEC to EMT Connectors
Roger Offline
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Registered: 05/18/02
Posts: 1779
Loc: N.C.
Gus, the conductor must be bonded to both ends of the ferrous raceway per 250.64(E)


Excerpt
Quote:
Ferrous metal enclosures that are not physically continuous from cabinets or equipment to the grounding electrode shall be made electrically continuous by bonding each end of the raceway or enclosure to the grounding electrode conductor. Bonding shall apply at each end and to all intervening ferrous raceways, boxes, and enclosures between the service equipment and the grounding electrode.


Roger

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#124415 - 09/29/06 09:07 AM Re: GEC to EMT Connectors
mikesh Offline
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Registered: 06/07/06
Posts: 614
Loc: Victoria, BC, Canada
I think I would reject the use of loomex connectors at the ends of the raceway as bonding method, but a bonding bushing a short piece of #6 and a split bolt rated for #6 and 3/0 or a lug under the same bolt as the ground lug would make me happy.

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#124416 - 09/29/06 09:10 AM Re: GEC to EMT Connectors
RSmike Offline
Member

Registered: 11/27/02
Posts: 130
Loc: Holland, MI USA
Is conduit considered a 'ferrous metal enclosure' ?

RSlater,
RSmike

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#124417 - 09/29/06 09:45 AM Re: GEC to EMT Connectors
Roger Offline
Member

Registered: 05/18/02
Posts: 1779
Loc: N.C.
RSmike, the second sentence covers the raceway.

250.92(A)(3) requires the same.

Quote:
250.92 Services

(A) Bonding of Services The non–current-carrying metal parts of equipment indicated in 250.92(A)(1), (A)(2), and (A)(3) shall be effectively bonded together.

(3) Any metallic raceway or armor enclosing a grounding electrode conductor as specified in 250.64(B). Bonding shall apply at each end and to all intervening raceways, boxes, and enclosures between the service equipment and the grounding electrode.


This is also explained on pages 126 and 127 of the 9th edition of Soares.

Roger

[This message has been edited by Roger (edited 09-29-2006).]

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