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#95632 - 09/22/05 07:43 PM Feeders and disconnect questions  
ShockMe77  Offline
Member
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
I have a job coming up in the next few weeks and I could really use some advice on what needs to be done up to code.

What I have is a separate building being fed from a multi-family dwelling. Two ungrounded conductors, and one grounded conductor (no ground), feeding a butcher block type business. The service to the building is under a 70 amp, 2-pole federal breaker at the main panel and #4 cu is being used.

At the point of attachment, the conductors are fed into a 1 - 1/4" RMC and LB'ed from there into the building. The panel is NOT at the nearest point of entrance and is at least 50' from the entrance point.

The work I'll be doing is re-attaching those service conductors to a new piece of RMC because the conductors are now secured by a vent stack. I know, lol, now I've seen it all.

My question is, since I'll be doing work to the service entrance, will I need to install a disconnect switch at the nearest point of entry inside the building? I've read the Code requirements in article 250.32 for the grounding update that I'll need to do. I just need to know if I NEED a new disconnect inside the building.

Thanks :-)


2017 / 2014 NEC & Related Books and Study Guides

#95633 - 09/26/05 07:16 PM Re: Feeders and disconnect questions  
tdhorne  Offline
Member
Joined: Mar 2001
Posts: 345
Maryland, USA
The code reads inside or outside. Try to sell it to the owners but if they say no and the inspector calls you on it they will think you sand bagged them.
--
Tom Horne


Tom Horne

"This alternating current stuff is just a fad. It is much too dangerous for general use" Thomas Alva Edison

#95634 - 09/27/05 09:26 AM Re: Feeders and disconnect questions  
jw electric  Offline
Member
Joined: Sep 2005
Posts: 106
Asheboro, NC
Thhis sounds like feeders from the mulitfamily dwelling.
Will the conductors have an overcurrent device on it from the mulitfamily dwelling?

If it does then Part II of 225 will come into play. See 225.30 through 225.40.

If you have any questions we will discuss them.
[Linked Image]


Mike

#95635 - 09/27/05 09:40 PM Re: Feeders and disconnect questions  
ShockMe77  Offline
Member
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
Jw, yes, the feeders coming from the multi-family dwelling have OCP. They are protected by a 2P 70 amp Federal CKT BKR.


Thanks for the replies. It is sincerely appreciated. I'm just trying to be the best electrician I can be. I have read several sections of the NEC and have concluded that I should treat this job as I would any normal service, including a disconnect at the nearest point of entrance. I'm also going to drive 2 ground rods to provide a good path to ground because right now there is no EGC!

I guess my next question would be this, do I need to bond the EGC to the neutral conductor at the main disconnect? I'm thinking yes I should based on it being the service entrance point.

Thank you all.

--Ron

[This message has been edited by ShockMe77 (edited 09-27-2005).]

[This message has been edited by ShockMe77 (edited 09-27-2005).]


#95636 - 09/27/05 09:56 PM Re: Feeders and disconnect questions  
jw electric  Offline
Member
Joined: Sep 2005
Posts: 106
Asheboro, NC
If you install two hots and a grounded (neutral) and no equipment grounding conductor and there is no metal paths (water, gas or other pipes) between the two buildings then treat it like a new service.

And if installing four conductors or a metal path is present then a sub panel.

Grounding electrode system is required


Mike


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