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size of wire? #42769
09/25/04 06:36 PM
09/25/04 06:36 PM
J
jayson  Offline OP
Member
Joined: May 2004
Posts: 49
russellspringsky
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 06:39 PM
09/25/04 06:39 PM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
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 07:49 PM
09/25/04 07:49 PM
A
Active 1  Offline
Member
Joined: Feb 2003
Posts: 687
Grayslake IL, USA
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 07:51 PM
09/25/04 07:51 PM
J
Joey D  Offline
Member
Joined: Oct 2003
Posts: 259
Arlington MA U.S.
2/0 copper
4/0 aluminum

Re: size of wire? #42773
09/25/04 07:54 PM
09/25/04 07:54 PM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
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 11:07 AM
09/26/04 11:07 AM
J
jayson  Offline OP
Member
Joined: May 2004
Posts: 49
russellspringsky
thanks guys


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