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?
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.