Motor Circuit Designer

The Motor Circuit Designer sizes motor branch circuits and feeders with several motors. It also sizes the overload protection and overcurrent protection of these circuits. The design is done in accordance with the 2017 National Electric Code (NEC). It covers single-phase, squirrel cage, synchronous, wound rotor and direct current motors.

The parameters required are:

The voltage of the branch circuit or feeder

The type of motor

The rating of the motor in horsepower

The length of the branch circuit or feeder

The maximum voltage drop that can be tolerated on the branch circuit or feeder, expressed as voltage or as a percentage of circuit voltage

The type of fuse or circuit breaker

The overload criteria

The outputs are:

The full load current

The conductor design current

The minimum conductor size required, in AWGMCM or mm2

The voltage drop expressed in both Volts and as a percentage

The minimum and maximum size of the overload protection required

The size of the overcurrent protection required

The minimum size of the disconnecting means that is required

It also indicates the articles or the tables in the NEC code that was used to determine these values.