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#42769 - 09/25/04 06:36 PM size of wire?  
jayson  Offline
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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#42770 - 09/25/04 06:39 PM Re: size of wire?  
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

#42771 - 09/25/04 07:49 PM Re: size of wire?  
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?


#42772 - 09/25/04 07:51 PM Re: size of wire?  
Joey D  Offline
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Joined: Oct 2003
Posts: 259
Arlington MA U.S.
2/0 copper
4/0 aluminum


#42773 - 09/25/04 07:54 PM Re: size of wire?  
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

#42774 - 09/26/04 11:07 AM Re: size of wire?  
jayson  Offline
Member
Joined: May 2004
Posts: 49
russellspringsky
thanks guys



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