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Subpanel #102224 10/05/05 07:59 PM
Joined: Jul 2004
Posts: 5
S
sam_rock Offline OP
New Member
Hi guys,,,
Can i use NMWU #6 copper to feed a 60 amp subpanel?
Thanks in advace

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Re: Subpanel #102225 10/06/05 10:46 PM
Joined: Oct 2003
Posts: 147
C
crash Offline
Member
I'm going to add a little bit to this question.

For the double dagger exception in Table 2 , how is a person to interpret (in relationship to services, feeders and branch circiuts) the term "subservice"?

Re: Subpanel #102226 10/07/05 12:24 AM
Joined: Nov 2001
Posts: 45
B
bill woods Offline
Member
isn't a subservice a load centre or subpanel? sam_rock be aware there are restrictions on running nmwu indoors. check with your ahj.

Re: Subpanel #102227 10/07/05 08:37 AM
Joined: Oct 2003
Posts: 147
C
crash Offline
Member
Good point Bill. According to table 19, NMWU has limited use in dry locations. And as such may not be acceptable for a residential sub panel.

I was always taught that the conductors feeding a load center or a sub panel were called feeders.

Re: Subpanel #102228 10/09/05 10:05 AM
Joined: Jan 2003
Posts: 174
B
bigrockk Offline
Member
Quote
According to table 19, NMWU has limited use in dry locations. And as such may not be acceptable for a residential sub panel.


It seems to me that according to T19 NMWU can be used pretty well any where NMD90 is used, so if we are talking residential (I am assuming single dwelling, and maybe that is my misunderstanding?) Under what
circumstances would NMWU not be acceptable to feed a sub panel, what am I missing?

Quote
For the double dagger exception in Table 2, how is a person to interpret (in relationship to services, feeders and branch circuits) the term "sub service"?

Not something I have really thought about before, I have always interpreted it as any panel/load centre that is feed from the main service.

Re: Subpanel #102229 10/09/05 11:28 AM
Joined: Feb 2004
Posts: 74
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CRM Offline
Member
Table 2, column 1 allows a #6 wire to be used at 60 amps, if this is for residential. Its common practice to use NMWU cable to feed detached garages from houses. The only restriction on using NMWU in a residence would be rule 30-408(1). Branch circuit conductors having insulation suitable for 90 degrees celsius shall be used for wiring of ceiling outlet boxes on which a luminaire is mounted except for boxes in wet locations where type NMW or NMWU cables are used.

Re: Subpanel #102230 10/10/05 11:29 PM
Joined: Oct 2003
Posts: 147
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crash Offline
Member
I stand corrected on the table 19 issue.

As far as the double dagger. Big Rock, this is not something I have thought about much, either. According to Sec 0 a circiut feeding a sub-panel is a "Feeder" (services and branch circiuts are also defined). Sub-service is not defined in Sec. 0.

If the definition of "sub-service" includes "feeders", then the answer to Sam-rock's question is "Yes", provided you follow table 19

Re: Subpanel #102231 10/18/05 07:06 PM
Joined: Jul 2004
Posts: 5
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sam_rock Offline OP
New Member
thank you everyone for helpful reply


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