ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Happy Father's Day!
by Bill Addiss - 06/19/21 04:16 PM
A Risky Setup
by timmp - 06/18/21 08:08 PM
Where is Everyone?
by gfretwell - 06/18/21 11:07 AM
Conduit over Vinyl Siding
by Jim M - 06/16/21 08:30 PM
Updated Forum Software
by Admin - 06/15/21 10:23 AM
New in the Gallery:
2020 - 2021 Winter Project
2020 - 2021 Winter Project
by Bill Addiss, April 29
Garden 2021
Garden 2021
by Bill Addiss, April 26
Who's Online Now
0 members (), 7 guests, and 13 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#86716 11/24/03 05:50 PM
Joined: Nov 2003
Posts: 2
B
Junior Member
Wow, spent the afternoon searching the archives re 100A subpanel. Bazillions of posts, opinions, and interpretations, but no consensus, but the safe way(s) to go are either:

1) Install 90A cb on feeder panel for #4 CU;
or
2) Use #3 CU.

(BTW, I plan on THHN).

Question about option #2- the neutral & grounding bars on the main panel are only rated for up to a #4 CU. What do I do with my grounded & grounding wires if I use #3?

Yes, I've removed the bonding jumper from my sub. Will make sure that neutral bars get only grounded conductors, and grounding bars get only grounding counductors.

Thanks!

2017 / 2014 NEC & Related Books and Study Guides
#86717 11/24/03 06:41 PM
Joined: Jan 2001
Posts: 1,044
Tom Offline
Member
Check the manufacturers catalog. Sometimes they make an auxilliary lug that will fasten into a couple of the neutral bus holes. I know that GE and Square D make these for their panels.

Tom


Few things are harder to put up with than the annoyance of a good example.

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

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

 

Member Spotlight
MarkC10
MarkC10
CA, Inland Empire
Posts: 43
Joined: September 2013
Top Posters(30 Days)
Trumpy 10
Admin 10
Popular Topics(Views)
280,438 Are you busy
213,522 Re: Forum
200,401 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5