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#87420 03/07/04 08:05 PM
Joined: Jan 2004
Posts: 1,507
G
Member
If I'm using THWN 4/0 Aluminum conductors to feed a Service panel with a 200 ampere main, What size Service do I have? Is the rating 200 amps or 180 amps?


George Little
2017 / 2014 NEC & Related Books and Study Guides
Joined: Feb 2004
Posts: 133
E
Member
200Amps per table 310.15(B)(6), right?

Joined: Apr 2002
Posts: 558
C
Member
Residential = 200 Amps
Other than Residential = 180 Amps but can be protected by 200 amp breaker or fuse.


Curt Swartz
Joined: Feb 2004
Posts: 133
E
Member
what section of the code allows for protecting THWN 4/0 Aluminum with 200Amp fuses for other than Residential?

Joined: Apr 2002
Posts: 558
C
Member
240.4(B)


Curt Swartz
Joined: Feb 2004
Posts: 133
E
Member
Right you are caselec. Thanks.


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