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size of wire? #42769 09/25/04 05:36 PM
Joined: May 2004
Posts: 49
J
jayson Offline OP
Member
what size of wire is service wire is needed for a 200 amp panel copper size? aluminum size?

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Re: size of wire? #42770 09/25/04 05:39 PM
Joined: Jan 2003
Posts: 4,391
I
iwire Offline
Moderator
The smallest permitted would be 4/0 AL for a dwelling service


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: size of wire? #42771 09/25/04 06:49 PM
Joined: Feb 2003
Posts: 687
A
Active 1 Offline
Member
We use 3/0 copper for all 3. Lots of locals want that. Someone elce might know the code but I think NEC lets you go one smaller?

Re: size of wire? #42772 09/25/04 06:51 PM
Joined: Oct 2003
Posts: 259
J
Joey D Offline
Member
2/0 copper
4/0 aluminum

Re: size of wire? #42773 09/25/04 06:54 PM
Joined: Jan 2003
Posts: 4,391
I
iwire Offline
Moderator
If we are talking dwelling unit services the NEC allows the use of Table 310.15(B)(6).

200 amp service 2/0 CU or 4/0 AL

100 amp service 4 CU or 2 AL

This does not apply to commercial services.

[This message has been edited by iwire (edited 09-25-2004).]


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: size of wire? #42774 09/26/04 10:07 AM
Joined: May 2004
Posts: 49
J
jayson Offline OP
Member
thanks guys


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