[encantotom]

thank you all, that helped a bunch.

i also talked to a electrical PE in power and he explained it all to me. btw, you HAVE to run the same size neutral as the hots in 240v. in a balanced load situation, (L1 and L2 at the same draw), then there is no current through the neutral. if L1 and L2 is unbalanced, the differential between the 2 is what the neutral carries. so if one leg was at 50a and the other at 0, then the neutral is carrying 50a, thus the need for it to be the same. the ground can be one size lower as it will never carry 50a.

wiring sizing is using the NEC for 240v. that gives a #6/3 romex as meeting code. it is rated up to 90 degrees C for temp at load.

i bought a lot of romex today of different sizes and it is really pricey nowadays. i still have to buy the 6/3 and it is really pricey.

home depot and lowes seems to be the cheapest for it.

so it sounds like 90 ish amps would be worst case.

thanks

tom