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#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!

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#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


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