120V circuits with 480V circuits in same conduit

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kriverswaters

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I have an application where I have two existing un-used underground conduits installed for a 480V gate operator for a parking lot. One of the conduits is for the low voltage control circuits and the other conduit is dedicated for the 480V gate motor itslef. Does the NEC Code allow me to add a 120V circuit for misc. lighting, etc. in the 480V dedicated conduit???
 
Re: 120V circuits with 480V circuits in same conduit

Yes, provided you can tell them apart from one another, such as color. Also the insulation values should be 600 V.
 
Re: 120V circuits with 480V circuits in same conduit

Yes you can do this . I like using black, red , and blue for my 120/208 circuts and a white neutral and brown, orange, and yellow for my 277/480 circuts with a gray neutral. It is very important you keep these marked .

Mike Pagano JW Wireman
 
Re: 120V circuits with 480V circuits in same conduit

Pagano21 or Dereck , this interesting subject came up at work today around quitting time , do either of you have NEC atricle reference to this ??

John
 
Re: 120V circuits with 480V circuits in same conduit

Drg: If you notice, codes are written in a more restrictive sense, as opposed to permissive. With that in mind, I think a better question would be: What code section prohibits this practice? Answer: None.

See 210.4 for a little more info ;)
 
Re: 120V circuits with 480V circuits in same conduit

Both references appreciated.

Identification of ungrounded conducors. Thanks John
 
Re: 120V circuits with 480V circuits in same conduit

The colors mentioned are industry standards (good ones IMO)not NEC. As Ryan stated it complies.
 
Re: 120V circuits with 480V circuits in same conduit

In reference to 210.4 and colors I am confused , is there something that I overlooked ?

I respectfully do not understand your point on this Dereck.

John
 
Re: 120V circuits with 480V circuits in same conduit

210.4(D)says where more than one voltage exist in a system or building shall be identified by phase and system. Permissable methods are color coding, tape, tags etc.

Ryan pointed out the code is a "permissive document". That is if it does not specify you cannot, then you can

Black, red, and blue for 208/120, and Orange, brown, yellow are industry standards. Although NEC does not specify they should be used, they do not prohibit them either.

If you can get a look at the 2002 Handbook, look at exhibit 200.2. It clearly illustrates your question and the answers you have recieved. Also note 200.6(D)

Good Luck.

[ January 06, 2004, 10:56 PM: Message edited by: dereckbc ]
 
Re: 120V circuits with 480V circuits in same conduit

Whoops , I planted my eyes in the code book looking for color reference and ignored the previous posts , excuse my temporary tunnel vision sir.

John
 
Re: 120V circuits with 480V circuits in same conduit

Originally posted by pagano21:
Yes you can do this . I like using black, red , and blue for my 120/208 circuts and a white neutral and brown, orange, and yellow for my 277/480 circuts with a gray neutral. It is very important you keep these marked .

Mike Pagano JW Wireman
Click to expand...
Are they multiwire circuts in the same raceway?
Click here for more on this subject
 
Re: 120V circuits with 480V circuits in same conduit

What about that requirement in Article 200 on the
use of the grounded conductor that requires one
of the neutrals to have a distinctive stripe other
that green?
 
Re: 120V circuits with 480V circuits in same conduit

Originally posted by agoordeen:
What about that requirement in Article 200 on the
use of the grounded conductor that requires one
of the neutrals to have a distinctive stripe other
that green?
Click to expand...
You are referring to 200.6(D) which relates to the earlier answers that you have to be able to distinguish between the two systems. I like to specify white with red stripe on 480/277 systems, and white on 208/120.
 
Re: 120V circuits with 480V circuits in same conduit

Thanks. I am more comfortable with this code
article (200.6 (d)).
 
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