Nvm, i figured out how to calculate it. For anyone interested, here's the breakdown:
- i have a 4 wire feeder cable (2 hot, 1 neutral, 1 ground) powering a sub panel which is 65amps @ 240v
- both of the hot wires = 65amps @ 120v
- If i install a 240v circuit that draws 30amps, it draws from 30...