ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Where is Everyone?
by gfretwell - 04/09/21 01:08 AM
HI gang, long time since I was here...
by gfretwell - 04/09/21 01:02 AM
Lock-down Thread
by gfretwell - 04/06/21 09:30 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
1 registered members (Scott35), 7 guests, and 19 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Tap Conductors #13444 09/04/02 03:34 PM
Joined: Sep 2002
Posts: 131
T
tsolanto Offline OP
Member
We were building a 400amp 3 phase service.
Out from the meter cabinet we went into a 400amp fused disconnect. From there we wanted to feed each of 2 Main breaker 200amp panels. My idea was to run 2 - 2" conduits, from the disconnect. one to each panel. the panels were 10 feet from the disconnect. I assumed that this could qualify as a tap. It's effectivly the same thing. The inspector violated it and said these were parallel conductors not a tap. I quoted 240-21D to no avail. Who is right?

Work Gear for Electricians and the Trades
Re: Tap Conductors #13445 09/04/02 03:52 PM
Joined: Jul 2002
Posts: 175
E
electric-ed Offline
Member
The feeder conductors would have to be tied together at both ends in order to be in parallel.

Ed

Re: Tap Conductors #13446 09/04/02 04:01 PM
Joined: Sep 2002
Posts: 131
T
tsolanto Offline OP
Member
In response to electric-ed is it legal to do the install the way I described it

Re: Tap Conductors #13447 09/04/02 04:22 PM
Joined: Jul 2002
Posts: 175
E
electric-ed Offline
Member
I am not sure of the NEC tap rules, as I live in Canada, but here it would be legal if- 1. the 200 amp feeder has an ampacity not less than the amp rating of the panel it feeds, and not less than the computed loads on that panel, and
2. it is not more than 10 ft. long, and
3. it is in non-ventilated raceway, or MC cable.

I would wait for a response from someone who knows the NEC on this.

Ed

[This message has been edited by electric-ed (edited 09-04-2002).]

Re: Tap Conductors #13448 09/04/02 06:59 PM
Joined: May 2002
Posts: 1,716
R
Roger Offline
Member
Tsolanto, your installation is legal. The inspector is wrong. These are two seperate loads and per your discription you are in compliance with tap rules.

I don't have a clue as to how he could consider two sets of conductors going to different points could be paralleled. [Linked Image]

If it would make him feel any better, you could scrap the 400 amp disconnect and use parallel lugs on the load side of the meter, or replace it with a gutter and simply splice 3\0 CU conductors to your 400 amp conductors here.

Given the location of these panels, this would be in compliance with articles 230 and 240.


Roger

[This message has been edited by Roger (edited 09-04-2002).]

Re: Tap Conductors #13449 09/04/02 09:42 PM
Joined: Apr 2002
Posts: 914
E
Electric Eagle Offline
Member
Sounds like your installation is code compliant from what you've stated. I would copy art. 230.46 and 240.21 and the Webster's dictionary definition of parallel and ask the inspector to re-evaluate his conclussion.


Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

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

 

Member Spotlight
Samurai
Samurai
Fl.
Posts: 46
Joined: May 2007
Show All Member Profiles 
Top Posters(30 Days)
BigB 1
Popular Topics(Views)
277,639 Are you busy
211,271 Re: Forum
198,304 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3