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#124408 - 09/28/06 08:40 AM GEC to EMT Connectors  
Admin  Offline

Joined: Oct 2000
Posts: 3,460
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 09:46 AM Re: GEC to EMT Connectors  
JJM  Offline
Joined: Oct 2005
Posts: 100
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.

[Linked Image]

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.


#124410 - 09/28/06 10:25 AM Re: GEC to EMT Connectors  
renosteinke  Offline
Cat Servant
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
JJM, that is the connector I use on EMT- together with an EMT connector, of course!

#124411 - 09/28/06 12:41 PM Re: GEC to EMT Connectors  
Gus99  Offline
Joined: Aug 2005
Posts: 24
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.

#124412 - 09/28/06 01:30 PM Re: GEC to EMT Connectors  
mxslick  Offline
Joined: Oct 2004
Posts: 803
Atomic City, ID USA
Look closely at the left of the second seems that the screw for the strap is not driven all the way in. Violation?

Stupid should be painful.

#124413 - 09/28/06 11:19 PM Re: GEC to EMT Connectors  
Lostazhell  Offline
Joined: Feb 2004
Posts: 1,431
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 [Linked Image]

#124414 - 09/29/06 07:27 AM Re: GEC to EMT Connectors  
Roger  Offline
Joined: May 2002
Posts: 1,716
Gus, the conductor must be bonded to both ends of the ferrous raceway per 250.64(E)

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.


#124415 - 09/29/06 11:07 AM Re: GEC to EMT Connectors  
mikesh  Offline
Joined: Jun 2006
Posts: 613
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.

#124416 - 09/29/06 11:10 AM Re: GEC to EMT Connectors  
RSmike  Offline
Joined: Nov 2002
Posts: 134
Holland, MI USA
Is conduit considered a 'ferrous metal enclosure' ?


#124417 - 09/29/06 11:45 AM Re: GEC to EMT Connectors  
Roger  Offline
Joined: May 2002
Posts: 1,716
RSmike, the second sentence covers the raceway.

250.92(A)(3) requires the same.

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.


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

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