🚫 “I have a 100A subpanel, so I can pull 100A.” No — continuous loads (over 3 hours) can only use 80% (80A). Derate calculator catches this before you trip breakers or overheat wires.
A 50A breaker can only continuously handle 40A. derate calculator
If you’ve ever planned a circuit for solar, EV charging, or high-power equipment, you’ve likely run into the (NEC 210.20(A) / 625.41). 🚫 “I have a 100A subpanel, so I can pull 100A