A customers adding a 2-pole 70Amp additional sub-panel to a 200Amp Main panel. I heard there is a 120 percent rule, and with my add-on this will indeed go over this 120 percent, which would be at a safe value of 240 AMPS. I am goin over this Amperage,
1)is this safe?
2)is this 120 percent rule real? If so, what's it all about?
1)is this safe?
2)is this 120 percent rule real? If so, what's it all about?