The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:

2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
International Wire Colour Codes
by Texas_Ranger
Today at 03:29 PM
Looking for older post
by Texas_Ranger
Today at 03:22 PM
Safety at heights?
by gfretwell
Today at 02:19 AM
Last time to chat here
by Trumpy
Yesterday at 11:41 PM
Unsafe Situations
by Trumpy
Yesterday at 09:46 PM
New in the Gallery:
Desk-mounted "power-board"
Shout Box

Top Posters (30 Days)
Admin 35
HotLine1 20
Trumpy 19
Ruben Rocha 17
gfretwell 16
Who's Online
0 registered (), 67 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#100149 - 10/23/06 01:25 PM Multiple feeds
Steve T Offline
Member

Registered: 02/14/01
Posts: 312
Loc: Oak Park, IL, USA
Is it possible to have a circuit feed both a lighting panel and a rooftop RTU? I have a set of 4/0's protected at 200amp from an MDP that is split in a j-box, the 4/0's continue to feed a lighting panel and a set of 3/0's goes up to a rooftop RTU. I don't have all the details of the rtu disco, fusing etc, but assuming they were all rated properly, is this installation possible? Is this considered a tap?

Top
2017 / 2014 NEC & Related Books and Study Guides
#100150 - 10/23/06 01:33 PM Re: Multiple feeds
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
It's not a 'tap' unless some of the conductors are rated less than the OCP protecting them.

It is sure a unusual set up but it could be code compliant if the load, conductors and overcurrent protection all match up properly.
_________________________
Bob Badger
Construction & Maintenance Electrician
Massachusetts

Top
#100151 - 10/23/06 03:01 PM Re: Multiple feeds
Steve T Offline
Member

Registered: 02/14/01
Posts: 312
Loc: Oak Park, IL, USA
Yeah--

Unfortunately, that's what I think too. But maybe forcing a detailed load calculation of the panel will convince them to do a separate run to the RTU. Sure hate to have to shut down lighting in half the place in order to work on the unit.

Thanks.

Top


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals