GENERAL INFORMATION

Watts
Volts x 1.732 Watts = Amps x Volts Volts
Watts
2

Commonly Used Formulas

240V 1Ph

Ungrounded

Ungrounded

Grounding

BLACK

RED

GREEN

240

120

Common Service Wire

Configurations

Page 9

120
(balanced 3 phase)
Amps =
Watts
Volts
(Single phase)
Amps = Ohms =
120
ABCNeutral
RED BLACK RED
120

120 208

208 208

208 3Ph
120
ABCNeutral
RED BLACK RED
120

120 240

240 240

240 3Ph

277

ABCNeutral
RED BLACK RED

277

277 480

480 480

480 3Ph/277 1Ph

Full Load Current Amps

208 Volt
1 Ph 3 Ph
6
kW
9
12
13.5
15
18
24
27
30
36
45
54
28.8 16.6
43.2 25.0
57.6 33.3
64.9 37.5
72.1 41.6
86.5 50.0
115.4 66.7
129.8 75.0
144.2 83.3
173.0 100.0
216.3 125.0
259.6 150.0
240 Volt 277 Volt 380 Volt 415 Volt 480 Volt 600 Volt
25.0 14.4
37.2 21.6
50.0 28.9
56.2 32.5
62.5 36.1
75.0 43.4
100.0 57.8
112.5 65.0
125.0 72.2
150.0 86.7
187.5 108.3
225.0 130.0
12.5 7.2
18.7 10.8
25.0 14.4
28.1 16.2
31.2 18.0
37.5 21.6
50.0 28.9
56.2 32.5
62.5 36.1
75.0 43.3
93.7 54.1
112.5 65.0
1 Ph
21.6
32.4
43.3
48.7
54.1
64.0
86.6
97.4
108.3
129.9
162.4
194.9
3 Ph
8.3
12.5
16.7
18.8
20.9
25.0
33.4
37.5
41.7
50.1
62.6
75.1
3 Ph
9.1
13.6
18.2
20.5
22.7
27.3
36.4
41.0
45.6
54.7
68.4
82.0
3 Ph
5.8
8.7
11.5
13.0
14.4
17.3
23.1
26.0
28.9
34.6
43.3
52.0
1 Ph 3 Ph 1 Ph 3 Ph
9