Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Electrical
Motor Starting Current Calculator
Calculate the full-load running current of a three-phase AC motor from its horsepower, voltage, and efficiency ratings. Useful for selecting circuit breakers, wire gauge, and motor starters.
Fill in the required fields to see your result.
Electrical
Short Circuit Current Calculator
Calculate the available short-circuit fault current at any point in a three-phase electrical system, accounting for transformer impedance and cable length. Use this for sizing breakers, fuses, and switchgear to meet NEC and ANSI interrupt ratings.
Fill in the required fields to see your result.
Key differences
| Motor Starting Current Calculator | Short Circuit Current Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 4 | 4 |
| Result | Starting Current (A) | Short Circuit Current (A) |
| What it does | Calculate the full-load running current of a three-phase AC motor from its horsepower, voltage, and efficiency ratings. Useful for selecting circuit breakers, wire gauge, and motor starters. | Calculate the available short-circuit fault current at any point in a three-phase electrical system, accounting for transformer impedance and cable length. Use this for sizing breakers, fuses, and switchgear to meet NEC and ANSI interrupt ratings. |