I don't believe you can. Per 334.80, the ampacity of NM, NMC, and NMS must be in accordance with the 60degC conductor temperature rating.
Thanks for that information, I am going to install # 6 conductor. Do i need to install a main breaker in my subpanel or does my main breaker in my main panel in the basement enough?
I usually don't do this, but I just have to ask: Why doesn't a master electrician know the answer to either of these questions?
I usually don't do this, but I just have to ask: Why doesn't a master electrician know the answer to either of these questions?
I usually don't do this, but I just have to ask: Why doesn't a master electrician know the answer to either of these questions?
There is such a wide spectrum in our industry; some may work predominately on commercial work and be lost stringing romex or wiring a hot tub or pool. (I was in this business 25 years before i drilled my first 2x4, but I could install a 4000amp service in my sleep). On the other hand, residential guys may never have had the opportunity to bend cut and thread 4" RMC.
What may seem obvious or second nature to some may be foreign to others.
I don't know if it has been mentioned ,..but here in Mass we only have to use the 60c when Nm cable is run in thermal insulation... if not in insulation the ampacity is back to 50 amps ,. if the terminals are rated for 75c ..Are you in Massachusetts?