ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Recent Posts
Underground phone and coax depth?
by gfretwell - 02/08/23 12:21 AM
Al Hildenbrand - Minneapolis - obituary
by Bill Addiss - 02/03/23 07:38 PM
by renosteinke - 01/27/23 09:52 PM
Does NEC 551.71 (F) apply to dwellings?
by BigB - 01/20/23 10:46 AM
New in the Gallery:
Burger King crown sillyness
Burger King crown sillyness
by wa2ise, December 11
240/208 to a house
240/208 to a house
by wa2ise, October 9
Who's Online Now
0 members (), 14 guests, and 12 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#30717 10/26/03 12:14 PM
Joined: Mar 2003
Posts: 10
I have a MCC feeding a 600 amp 277/480 4 wire MCC. I'm using parallel 500mcm for the phases but there is no actuall load on the neutral so can I get away with no neutral? My concern is that the blue prints list it as 4 wire so do you think they want a neutral pulled for future use maybee?

Any info appreciated.

Joined: Jun 2001
Posts: 642
Where is this MCC getting it's control power from?
If the plans and specs call out 4 wire, I would install a full size neutral. You cannot know what is planned for the future unless all the MCC buckets are used now.

Joined: Jan 2003
Posts: 4,391
If the plans called for a four wire feeder to this MCC and you bid it and won it with that requirement you should install it.

Putting aside that it is the right thing to do, if after you leave the job they need that neutral who do you think will pay for it to be installed?

Bob Badger
Construction & Maintenance Electrician
Joined: Mar 2003
Posts: 10
One bucket of the mcc is feeding a transformer which in turn id feeding a 120/208 panel. This panel is feeding two controll panels for all my controll wiring.
Each bucket of the mcc has a TRF for the coils within it.

I did not bid the job but the nuetral was included in the bid so IMO it should be included but my superiors think different.

This post is mostly meant to justify my thinking, I wanted to make sure I wasnt missing something.

Joined: Aug 2003
Posts: 1,374
I would send an RFI to the engineer and get a CCD on paper to cover your back.

Ryan Jackson,
Salt Lake City
Joined: Feb 2003
Posts: 198
Tim,- Was an equip. gnd. pulled in?, since someone is trying to cut corners on your job?

Shoot first, apologize later.....maybe
Joined: Mar 2003
Posts: 10
Yes a equipment ground will be pulled in

Joined: Aug 2003
Posts: 123
I feel it is up to the owner.
Now cost vs. later. Explain the cost at a later date.
If he wants to save money at this point, he may want to.
I also agree with paper from the engineer, CYA.

Link Copied to Clipboard

Tools for Electricians
Tools for Electricians

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC Now Available!
* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Kansas City, KS
Posts: 30
Joined: January 2013
Top Posters(30 Days)
triple 3
BigB 2
Popular Topics(Views)
303,274 Are you busy
232,242 Re: Forum
216,993 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5