My mother in law recently replaced her 4 burner Frigidaire range and is often popping her breaker when she is cooking for a large party - ie 4 burners going and oven.
I checked the specs for the range and they suggest a 50A breaker. The electrical circuit however is a 40A breaker. The cable is a cu Phillips NMD7 8/3 Nylon 900 300V. The run is about 40-50ft, not in conduit - parts are in unfinished ceiling, other parts behind acoustic tile. But either way, plenty of ventilation.
From what I've read,I can put a 50A breaker on a 8/3 THHN cable but I don't see that rating (THHN) printed anywhere.
Is the NMD7 nylon 900 THHN? Or does it need to be specifically indicated? What does the 900 stand for?
Is the only choice to have a new 6/3 cable run?