ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Burning out of return(white) side of 120volt rec
by crselectric. 06/14/19 02:15 AM
Video door bell causing chime activation of coil
by JoeTestingEngr. 06/13/19 12:43 PM
Troubleshooting Voltage Drop Across Relay
by gfretwell. 06/09/19 11:49 AM
Apple Recalls Three-Prong Wall Plug Adapters
by Admin. 06/05/19 09:06 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 9 guests, and 15 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
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?

Work Gear for Electricians and the Trades
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


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
electure
electure
Fullerton, CA USA
Posts: 4,280
Joined: December 2000
Show All Member Profiles 
Top Posters(30 Days)
Khombo 2
Popular Topics(Views)
255,764 Are you busy
191,731 Re: Forum
181,497 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.017s Queries: 14 (0.004s) Memory: 0.9745 MB (Peak: 1.1201 MB) Zlib enabled. Server Time: 2019-06-20 03:11:41 UTC