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#102224 - 10/05/05 04:59 PM Subpanel
sam_rock Offline
New Member
Registered: 07/03/04
Posts: 5
Loc: canada
Hi guys,,,
Can i use NMWU #6 copper to feed a 60 amp subpanel?
Thanks in advace
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#102225 - 10/06/05 07:46 PM Re: Subpanel
crash Offline
Member
Registered: 10/21/03
Posts: 147
Loc: Calgary Canada
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"?
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#102226 - 10/06/05 09:24 PM Re: Subpanel
bill woods Offline
Member
Registered: 11/21/01
Posts: 45
isn't a subservice a load centre or subpanel? sam_rock be aware there are restrictions on running nmwu indoors. check with your ahj.
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#102227 - 10/07/05 05:37 AM Re: Subpanel
crash Offline
Member
Registered: 10/21/03
Posts: 147
Loc: Calgary Canada
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.
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#102228 - 10/09/05 07:05 AM Re: Subpanel
bigrockk Offline
Member
Registered: 01/25/03
Posts: 174
Loc: Middle of Canada
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.
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#102229 - 10/09/05 08:28 AM Re: Subpanel
CRM Offline
Member
Registered: 02/29/04
Posts: 74
Loc: Alberta Canada
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.
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#102230 - 10/10/05 08:29 PM Re: Subpanel
crash Offline
Member
Registered: 10/21/03
Posts: 147
Loc: Calgary Canada
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
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#102231 - 10/18/05 04:06 PM Re: Subpanel
sam_rock Offline
New Member
Registered: 07/03/04
Posts: 5
Loc: canada
thank you everyone for helpful reply
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