Three Phase Electrical Motors

Full load amps, wire and conduit sizes for three phase electrical motors

Typical full load current, minimum wire size and conduit size for 230V and 460V three phase electrical motors:

Power
(hp)
Full Load (amps)Minimum Wire Size
(AWG - Rubber)
Conduit Size
(inches)
230V460V230V460V230V460V
1 3.3 1.7 14 14 1/2 1/2
1.5 4.7 2.4 14 14 1/2 1/2
2 6 3 14 14 1/2 1/2
3 9 4.5 14 14 1/2 1/2
5 15 7.5 12 14 1/2 1/2
7.5 22 11 8 14 3/4 1/2
10 27 14 8 12 3/4 1/2
15 38 19 6 10 1-1/4 3/4
20 52 26 4 8 1-1/4 3/4
25 64 32 3 6 1-1/4 1-1/4
30 77 39 1 6 1-1/2 1-1/4
40 101 51 00 4 2 1-1/4
50 125 63 000 3 2 1-1/4
60 149 75 200M 1 2-1/2 1-1/2
75 180 90 0000 0 2-1/2 2
100 245 123 500M 000 3 2
125 310 155 750M 0000 3-1/2 2-1/2
150 360 180 1000M 300M 4 2-1/2

Related Topics

  • Electrical - Electrical units, amps and electrical wiring, wire gauge and AWG, electrical formulas and motors

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