Three-Phase Electrical Motors - Power vs. Amps and Voltage

Full load amps, wire and conduit sizes for three phase electrical motors. Provides typical full load current, minimum wire size and conduit size for 230V and 460V three phase electrical motors.

Power (hp)	Power (kW)	Full Load Amps @ 230V	Full Load Amps @ 460V	Min Wire Size @ 230V (AWG)	Min Wire Size @ 460V (AWG)	Conduit Size @ 230V (inches)	Conduit Size @ 460V (inches)
1	0.75	3.3	1.7	14	14	1/2	1/2
1.5	1.1	4.7	2.4	14	14	1/2	1/2
2	1.5	6	3	14	14	1/2	1/2
3	2.3	9	4.5	14	14	1/2	1/2
5	3.8	15	7.5	12	14	1/2	1/2
7.5	5.6	22	11	8	14	3/4	1/2
10	7.5	27	14	8	12	3/4	1/2
15	11	38	19	6	10	1-1/4	3/4
20	15	52	26	4	8	1-1/4	3/4
25	19	64	32	3	6	1-1/4	1-1/4
30	23	77	39	1	6	1-1/2	1-1/4
40	30	101	51	00	4	2	1-1/4
50	38	125	63	000	3	2	1-1/4
60	45	149	75	200M	1	2-1/2	1-1/2
75	56	180	90	0000	0	2-1/2	2
100	75	245	123	500M	000	3	2
125	94	310	155	750M	0000	3-1/2	2-1/2
150	113	360	180	1000M	300M	4	2-1/2