|
FULL LOAD CURRENT AND OTHER DATA FOR THREE PHASE A.C. MOTORS
| Motor Horse-power |
Volts |
Motor Ampere |
Size Breaker |
Size Starter |
Heater Ampere |
Size Wire |
Size Conduit |
| 1 |
230V
460V |
4.2
2.1 |
15
15 |
00
00 |
4.830
2.415 |
12
12 |
3/4"
3/4" |
|
1-1/2 |
230V
460V |
6.0
3.0 |
15
15 |
00
00 |
6.900
3.450 |
12
12 |
3/4"
3/4" |
| 2 |
230V
460V |
6.8
3.4 |
15
15 |
0
00 |
7.820
3.910 |
12
12 |
3/4"
3/4" |
| 3 |
230V
460V |
9.6
4.8 |
20
15 |
0
0 |
11.040
5.520 |
12
12 |
3/4"
3/4" |
| 5 |
230V
460V |
15.2
7.6 |
30
15 |
1
0 |
17.480
8.740 |
12
12 |
3/4"
3/4" |
|
7-1/2 |
230V
460V |
22
11 |
45
20 |
1
1 |
25.300
12.650 |
10
12 |
3/4"
3/4" |
|
10 |
230V
460V |
28
14 |
60
30 |
2
1 |
32.200
16.100 |
10
12 |
3/4"
3/4" |
|
15 |
230V
460V |
42
21 |
70
40 |
2
2 |
48.300
24.150 |
6
10 |
1"
3/4" |
|
20 |
230V
460V |
54
27 |
100
50 |
3
2 |
62.100
31.050 |
4
10 |
1"
3/4" |
|
25 |
230V
460V |
68
34 |
100
50 |
3
2 |
78.200
39.100 |
4
8 |
1-1/2"
1" |
1) Overcurrent device may have to be increased due to starting current and load conditions. See 2008 NEC 430.250, Table 430-250. 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.
|