Full Load Current in Amperes in 3 Phase

Resources : Full Load Current in Amperes in 3 Phase
Motor Horsepower Motor Ampere Size Breaker Size Starter Heater Ampere Size Wire Size Conduit
1 230V 4.2 15  0  4.83  12  3/4"
460V 2.1 15 0 2.415 12 3/4"
1 1/2 230V 6 15 0 6.9 12 3/4"
460V 3 15 0 3.45 12 3/4"
2 230V 6.8 15 0 7.82 12 3/4"
460V 3.4 15 0 3.91 12 3/4"
3 230V 9.6 15 0 11.04 12 3/4"
460V 4.8 15 0 5.52 12 3/4"
5 230V 15.2 15 1 17.48 12 3/4"
460V 7.6 15 0 8.74 12 3/4"
7 1/2 230V 22 40 1 25.3 10 3/4"
460V 11 30 1 12.65 12 3/4"
10 230V 28 50 2 32.2 10 3/4"
460V 14 30 1 16.1 12 3/4"
15 230V 42 70 2 48.3 6 1"
460V 21 40 2 24.15 10 3/4"
20 230V 54 100 3 62.1 6 1"
460V 27 50 2 31.05 10 3/4"
25 230V 68 100 3 78.2 4 1-1/2"
460V 34 50 2 39.1 8 1"
  1. Overcurrent device may have to be increased due to starting current and load conditions. See NEC 430-52, Table 430-152. Wire based on 75°C terminations and insulation.
  2. Overload heater must be based on motor nameplate and sized per NEC 430-32.
  3. Conduit size based on Rigid metal conduit with some spare capacity. For minimum size and other conduit types, see NEC Appendix C, or UGLY'S pages 102-122.