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#90392 11/18/04 02:37 PM
Joined: Feb 2004
Posts: 494
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Hi,
If there is a pole 125' from a residence that has the main panel in the garage on a lower level and there is a main at the pole and a main at the main panel and there are three USE feeders to a pull box does the gec at the residence have to be in the raceway from the pull box to the main panel? The wiring must transition here to an inside wiring method..

I was planning to use a 3 conductor SER cable from the pull box to the panel and run the gec from the main panel to the ground rod.

I am asking because it is after the first ocpd.

Thanks for any replies

Mustang

2017 / 2014 NEC & Related Books and Study Guides
#90393 11/18/04 02:47 PM
Joined: Jan 2004
Posts: 1,507
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The only reason to put the GEC (Grounding Electrode Conductor) in a raceway would be to protect it from "Severe Physical Damage" or if it were smaller than #8. Code reference: 250.64(B)


George Little
#90394 11/18/04 03:40 PM
Joined: Jun 2004
Posts: 613
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Why do you have a main disco at the pole?The GEC should run to the 1st main disconnect for any installation.

shortcircuit

#90395 11/18/04 05:13 PM
Joined: Jan 2004
Posts: 1,507
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Hey Short Circuit, it's not uncommon to have the Service Disconect on a pole. They do it all the time in Texas and I've seen it even here in Michigan. The Service Disconnect and the meter for the utility is on the pole. I might add they have a Maypole type arrangement for the rural area and feeders run to numerous buildings as a standard installation. Makes it easy for the firemen to disconnect power [Linked Image]

[This message has been edited by George Little (edited 11-18-2004).]


George Little
#90396 11/18/04 07:14 PM
Joined: Feb 2004
Posts: 494
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Hi,
Thanks for the replies. The pole and meter base ocpd combo (SQD) is set to provide temp power for the site until the main panel at the house is set. It is not uncommon to have a pole with a meterbase and a disconnect on it. Almost ALL trailer parks are like that and almost all farms will have this arrangement.

There is nothing wrong with it as far as I know.

George, wouldn't the GEC have to be in the raceway or cable if this is considered a sub panel? Seeing as how it is fed from the pole I was just curious if there was anything to watch out for. Just trying to confirm.

I was just verifying what I was thinking because you have to be careful after the first OCPD with the conductors.

Thanks for the replies.

-regards

Mustang

[This message has been edited by mustangelectric (edited 11-18-2004).]

#90397 11/18/04 08:28 PM
Joined: Jun 2004
Posts: 613
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Doesn't 250.24 require the GEC to be installed at or before the main disconnect?

And I would consider it a grounding conductor if it is after the main ocpd combo meter base.

250.134b says that the grounding conductor be run with circuit conductors.

If this is not correct,where does the code allow a different arrangement?

shortcircuit

#90398 11/18/04 08:34 PM
Joined: Feb 2004
Posts: 494
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Hi,
Have you ever seen an overhead SE drop with a EGC or GEC?

The first ocpd has a gec but no egc.

The GEC is ALSO REQUIRED to be established at the detached building or seperate service.

Correct?

-regards

Mustang



[This message has been edited by mustangelectric (edited 11-18-2004).]

#90399 11/18/04 08:53 PM
Joined: Jun 2004
Posts: 613
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Hi Mustang...maybe I'm not understanding your first post. I thought that the USE feeders are installed from the pole 125" from the residense to a hand hole by the residense where you will make the transition to the main panel in the garage???

shortcircuit

#90400 11/18/04 10:34 PM
Joined: Jun 2004
Posts: 613
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Member
Hey George Little...I don't see disconnects on poles to much. Seems like it would be easy for vandals to shut down power to the dwelling.When I have seen them they are up high out of reach(8')...and are for something like traffic lights or telephone equipment.Are the disco you see out of harms way? What is a Maypole???I do understand that things are done differently throughout this great country of ours [Linked Image]

shortcircuit

#90401 11/20/04 01:14 AM
Joined: Jul 2004
Posts: 9,644
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A maypole is a central pole where the service drop lands with the disco and meter that then gets distributed to other locations. I used to see that in state parks fairly often. The service pole would be right in the middle of several buildings with a transformer on it and the MV line on top. They looped down to the disconnect/meter Below the transformer there would be a series of drops going to the buildings.


Greg Fretwell
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