Full-Load Current

Line current from kVA, kW and HP at common single- and three-phase voltages.

Motor currents below are calculated. They are not the NEC motor full-load current table values, which conductor and protection sizing for motors must use (NEC 2023 430.6(A)(1)).

Three-phase, from kVA amperes

kVA	208 V	240 V	480 V	600 V	4,160 V	13,800 V
15	41.6	36.1	18.0	14.4	2.1	0.6
30	83.3	72.2	36.1	28.9	4.2	1.3
45	125	108	54.1	43.3	6.2	1.9
75	208	180	90.2	72.2	10.4	3.1
112.5	312	271	135	108	15.6	4.7
150	416	361	180	144	20.8	6.3
225	625	541	271	217	31.2	9.4
300	833	722	361	289	41.6	12.6
500	1,388	1,203	601	481	69.4	20.9
750	2,082	1,804	902	722	104	31.4
1000	2,776	2,406	1,203	962	139	41.8
1500	4,164	3,608	1,804	1,443	208	62.8
2000	5,551	4,811	2,406	1,925	278	83.7
2500	6,939	6,014	3,007	2,406	347	105
3000	8,327	7,217	3,608	2,887	416	126

Single-phase, from kVA amperes

kVA	120 V	240 V
10	83.3	41.7
15	125	62.5
25	208	104
37.5	313	156
50	417	208
75	625	313
100	833	417
167	1,392	696

Three-phase 480 V, from kW amperes by power factor

kW	PF 0.80	PF 0.85	PF 0.90	PF 1.00
1	1.5	1.4	1.3	1.2
5	7.5	7.1	6.7	6.0
10	15.0	14.2	13.4	12.0
25	37.6	35.4	33.4	30.1
50	75.2	70.8	66.8	60.1
75	113	106	100	90.2
100	150	142	134	120
150	226	212	200	180
200	301	283	267	241
300	451	425	401	361
500	752	708	668	601

Three-phase 460 V, from HP (PF 0.85, η 0.9 assumed) amperes — not NEC table values

HP	Calculated A
1	1.2
2	2.4
5	6.1
10	12.2
15	18.4
20	24.5
25	30.6
30	36.7
40	48.9
50	61.2
75	91.8
100	122
150	184
200	245