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#42769 - 09/25/04 03:36 PM size of wire?
jayson Offline
Member
Registered: 05/12/04
Posts: 49
Loc: russellspringsky
what size of wire is service wire is needed for a 200 amp panel copper size? aluminum size?
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#42770 - 09/25/04 03:39 PM Re: size of wire?
iwire Offline
Moderator
Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
The smallest permitted would be 4/0 AL for a dwelling service
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Bob Badger
Construction & Maintenance Electrician
Massachusetts
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#42771 - 09/25/04 04:49 PM Re: size of wire?
Active 1 Offline
Member
Registered: 02/22/03
Posts: 684
Loc: 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?
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#42772 - 09/25/04 04:51 PM Re: size of wire?
Joey D Offline
Member
Registered: 10/10/03
Posts: 263
Loc: Arlington MA U.S.
2/0 copper
4/0 aluminum
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#42773 - 09/25/04 04:54 PM Re: size of wire?
iwire Offline
Moderator
Registered: 01/05/03
Posts: 4343
Loc: 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).]
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Bob Badger
Construction & Maintenance Electrician
Massachusetts
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#42774 - 09/26/04 08:07 AM Re: size of wire?
jayson Offline
Member
Registered: 05/12/04
Posts: 49
Loc: russellspringsky
thanks guys
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