Sorry to be so dumb here, but I'm trying to figure out the derating in some circuits I will be pulling. Been a long time since I had to derate. I'll be having 9 current carrying conductors in 1 conduit. The total load on 1 circuit will be 49.38 amps. ( 3 phase ). Since I would normally use # 6 wire using the 60 degree table which is good for 55 amps, do I take 70% of the 55 amps, which gives me 38.5 amps? If so, then even if I use #4 wire, which is good for 70 amps, then that still will not be quiet enough to make the 49.38 amps needed, unless I can drop the .38 amps. But then again, if I can verify the terminals good enough for 75 degree wire, then I can go by the 75 degree table. But these machines are so old, I doubt I'll be able to verify that, since there is not a label to go by. I wonder if anyone could give me some input on this? The other two circuits will both be 26.3 amps. apiece. (3 phase also) thanks again