Resources / motor calculator
Motor calculator
Not sure why the short-circuit device is bigger than the conductor? Sign up for class! →Restored your last calculation.
The motor
Full-load current
Branch-circuit conductors
Overload protection
Short-circuit and ground-fault protection
430.52(C)(1)(a) already permits the next standard size up from 240.6. Tick the box above only where the device still will not carry the starting current.
Disconnecting means
Feeder conductors and protection
Equipment grounding
The circuit
Based on the base 2023 NEC (NFPA 70). States and local jurisdictions amend it. Check your local amendments before relying on this.
