wwhitney: The following manufacturer's data sheet lists allowable ampacities for NM-B 8/2 and NM-B 8/3 as 40a, not 50a, together with the statement "Type NM-B ampacity limitation shall be in accordance with the 60ºC conductor temperature rating, as specified in the NEC":
https://www.encorewire.com/wp-content/uploads/EncoreWire-NMB.pdf
Am I misunderstanding something? Thanks for all your valuable and informative posts here over the years, btw!
https://www.encorewire.com/wp-content/uploads/EncoreWire-NMB.pdf
Am I misunderstanding something? Thanks for all your valuable and informative posts here over the years, btw!