![]() ![]() NM-B is rated at 600 volts and although it is rated at a conductor temperature of 90☌ dry, its ampacity is limited to 60☌ according to the NEC 2008 and NEC 2011. Its applications are outlined in NEC 2008 and NEC 2011 Article 334. Non-metallic sheathed NM-B cable is used in normally dry installations in residential wiring, as branch circuits for outlets, lighting and other residential loads.
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