15 Hp Electric Motor Wire Size

All wiring should be performed by a licensed electrician or electrical contractor and must meet all applicable codes for the area where installed.

15 hp electric motor wire size. The charts below contain recommended minimum wire size awg for different voltage horsepower and cable length combinations. 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. Dual element time delay ul class rk5 fuse.

Enter the motor horsepower and voltage. Horsepower or amperage of the motor s length of the cable or run. 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. The table will give you the size of the short circuit protection as a percentage of the full load current.

Low voltage can cause the motor to fail. 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. Locate where your motor falls in table 430 52 based on the full load current and motor size. 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.

I installed a 20 double pole breaker in the panel. This calculator will also give you motor amps and recommended breaker size starter size heater size and conduit size. 225 note 13. And are based on the 1996 national electrical code.

Motor hp voltage typical motor f l a. 1300 1700 for design b note 14. These charts are only a guide. Copper conductor 75 c rating 30 c ambient wire size awg no.

I ran 10 3 wire from my panel to a disconnect box and the wire run was 55 feet. I don t want to hijack the original posters thread but i have a question regarding an air compressor. 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. I have a 3 5 hp single phase motor that says 15 amps on the motor sticker.

How to calculate wire and fuse sizes for electric motors because electric motors have a tremendous amperage draw during the. Lake van ness circle fresno ca 93711 phone. 1 1 2 3 5 7 10 15 20 25 30 40 50 60 75 100 125 150. 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.