Convert Ampere between Single Phase and 3 Phase

Convert amperage between single phase (120, 240 and 480 Voltage) and three phase (240 and 480 Voltage)

In a single-phase AC power system there is only one single sinusoidal voltage.

Most AC power is produced and distributed as three-phase power with three sinusoidal voltages 120 degrees out of phase with each other.

The diagram and table below can be used to convert amperage between single phase and three phase equipment and vice versa.

power va volt ampere diagram

Power
(VA)
Amperage (A)
Volts Single PhaseVolts 3 Phase
Balanced Load
120240480240480
100
150
200
250
300
0.83
1.25
1.67
2.08
2.50
0.42
0.63
0.83
1.04
1.25
0.21
0.31
0.42
0.52
0.63
0.24
0.36
0.49
0.61
0.73
0.13
0.18
0.25
0.30
0.37
350
400
450
500
600
2.92
3.33
3.75
4.17
5.00
1.46
1.67
1.88
2.08
2.50
0.73
0.84
0.93
1.04
1.25
0.85
0.97
1.10
1.20
1.45
0.43
0.49
0.55
0.60
0.73
700
750
800
900
1000
5.83
6.25
6.67
7.50
8.33
2.92
3.13
3.33
3.75
4.17
1.46
1.56
1.67
1.87
2.10
1.70
1.81
1.93
2.17
2.41
0.85
0.91
0.97
1.09
1.21
1100
1200
1250
1300
1400
9.17
10.0
10.4
10.8
11.7
4.58
5.00
5.21
5.42
5.83
2.30
2.51
2.61
2.71
2.91
2.65
2.90
3.10
3.13
3.38
1.33
1.45
1.55
1.57
1.69
1500
1600
1700
1750
1800
12.5
13.3
14.2
14.6
15.0
6.25
6.67
7.08
7.29
7.50
3.12
3.34
3.54
3.65
3.75
3.62
3.86
4.10
4.22
4.34
1.82
1.93
2.05
2.10
2.17
1900
2000
2200
2500
2750
15.8
16.7
18.3
20.8
23.0
7.92
8.33
9.17
10.4
11.5
3.96
4.17
4.59
5.21
5.73
4.58
4.82
5.30
6.10
6.63
2.29
2.41
2.65
3.05
3.32
3000
3500
4000
4500
5000
25.0
29.2
33.3
37.5
41.7
12.5
14.6
16.7
18.8
20.8
6.25
7.30
8.33
9.38
10.42
7.23
8.45
9.64
10.8
12.1
3.62
4.23
4.82
5.42
6.10
6000
7000
8000
9000
10000
50.0
58.3
66.7
75.0
83.3
25.0
29.2
33.3
37.5
41.7
12.50
14.59
16.67
18.75
20.85
14.5
16.9
19.3
21.7
24.1
7.25
8.50
9.65
10.9
12.1

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