Ease of selection is a fundamental design advantage of a NEMA-style starter. To select a NEMA starter only horsepower and voltage are needed. NEMA starters have interchangeable heater elements and makes NEMA starters attractive in projects where the motor specification is not known until the start-up date.
Maximum horsepower with full voltage starting and two pole contactors are indicated below:
|NEMA Size||115 volts||230 volts|
Electrical units, amps and electrical wiring, wire gauge and AWG, electrical formulas and motors.
Electrical motors NEMA frame dimensions.
NEMA frame assignments.
Calculate electric motors shaft power.
NEMA - electrical motor efficiency ratings.
National Electrical Code.
National Electrical Manufacturers Association.
Avoid overheated variable frequency drives with adequate ventilation.
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