15 Hp Electric Motor Wire Size

How to calculate wire and fuse sizes for electric motors because electric motors have a tremendous amperage draw during the.

15 hp electric motor wire size. I installed a 20 double pole breaker in the panel. Enter the motor horsepower and voltage. Motor disconnect size note 17 amperes minimum. Dual element time delay ul class rk5 fuse.

I ran 10 3 wire from my panel to a disconnect box and the wire run was 55 feet. For example if there are three 15 amp motors in the circuit the ampacity rating of the wire feeding the circuit must exceed 15 15 15 1 25 48 75 amps. 1300 1700 for design b note 14. For example if the full load current of the motor is 20 amps and the short circuit protection is 150 percent of the full load current then the the short circuit device must be 30 amps.

The wire size is too small. For circuits with multiple motors the ampacity rating of the wire must be at least 125 of the full load current of the largest motor plus the sum of full load currents for the rest of the motors. Lake van ness circle fresno ca 93711 phone. And are based on the 1996 national electrical code.

This calculator will also give you motor amps and recommended breaker size starter size heater size and conduit size. 1 1 2 3 5 7 10 15 20 25 30 40 50 60 75 100 125 150. Please consult the national electric code nec and any applicable local standards for exact requirements. Copper conductor 75 c rating 30 c ambient wire size awg no.

Low voltage can cause the motor to fail. The charts below contain recommended minimum wire size awg for different voltage horsepower and cable length combinations. These charts are only a guide. I don t want to hijack the original posters thread but i have a question regarding an air compressor.

Electrical motor wiring data nema amps starter size hmcp size for motors ranging 1 2 to 500 hp sponsored links 480 volt motor wiring data national electric manufacturers association nema amps starter size hmcp size overload phase wires gnd and conduit size. Motor hp voltage typical motor f l a. 1 3 hp 10 amp 15 amp 126 ft 201 ft 321 ft 509 ft 811 ft 1288 ft 195 ft 309 ft 492 ft 783 ft. Horsepower or amperage of the motor s length of the cable or run.

Hp rated switch min a 400 for fuses not greater than 600 amperes b 300 for fuses of 601 to 6000 ampere classification notes 12 16. All wiring should be performed by a licensed electrician or electrical contractor and must meet all applicable codes for the area where installed. The table will give you the size of the short circuit protection as a percentage of the full load current. A 400 for fla of 100 amperes or less b 300 fla is greater than 100 amperes note 15.