Hatco IMPERIAL "S" Installation & Operating Manual page 9

CIRCUIT BREAKER & FUSED DISCONNECT SWITCH SIZES - 36 to 57 kW
kW Volts*
36 208
208
240
240
380
480
600
39 208
208
240
240
380
480
600
40 380
40.5 208
240
480
600
45 208
240
240
380
480
600
54 208
240
380
480
600
57 208
240
380
480
600
Wire size is based on THHN wire for branch circuit protection at .91 derate factor. Circuit breakers and fused
disconnects are to be mounted remote and wired by contractor. Sizes are based on the 2002 NEC table
310-16. Conduit size based on conductors plus ground wire sizing per Table C1 from Appendix C.
Only 6, 7 & 9 kW models can be field converted to single or three phase (open delta on 3 phase). Larger
branch circuit required than for balanced 3 phase of equal kW. Balanced 3 phase available, consult factory.
NOTE: 250 kcmil maximum wire size for terminal block.
Phase Amp Draw
L1 L2
1 173 173
3 100 100
1 150 150
3 86.7 86.7
3 54.7 54.7
3 43.3 43.3
3 34.7 34.7
1 187.5 187.5
3 108 108
1 163.5 163.5
3 94 94
3 59.3 59.3
3 47 47
3 37.6 37.6
3 61.6 61.6
3 112.5 112.5
3 97.5 97.5
3 48.8 48.8
3 39 39
3 125 125
1 188 188
3 108 108
3 68.6 68.6
3 54 54
3 43.4 43.4
3 150 150
3 130 130
3 82.0 82.0
3 65 65
3 52 52
3 158.4 158.4
3 137.3 137.3
3 86.7 86.7
3 68.6 68.6
3 54.9 54.9
Breaker or
L3 Fuse Size
- 225
100 125
- 200
86.7 125
54.7 70
43.3 60
34.7 50
- 250
108 150
- 225
94 125
59.3 90
47 60
37.6 50
61.6 90
112.5 150
97.5 125
48.8 70
39 50
125 175
- 250
108 150
68.6 90
54 70
43.4 60
150 200
130 175
82.0 125
65 90
52 70
158.4 225
137.3 200
86.7 125
68.6 90
54.9 70
7
SPECIFICATIONS
Copper C o n d u i t
Wire Size Size
4/0 1-1/2" (38 mm)
1 1-1/4" (32 mm)
3/0 1-1/2" (38 mm)
1 1-1/4" (32 mm)
4 1" (25 mm)
6 3/4" (19 mm)
8 1/2" (13 mm)
250 kcmil 2" (51 mm)
1/0 1-1/4" (32 mm)
4/0 2" (51 mm)
1 1-1/4" (32 mm)
3 1" (25 mm)
6 3/4" (19 mm)
8 1/2" (13 mm)
3 1" (25 mm)
1/0 1-1/4" (32 mm)
1 1-1/4" (32 mm)
4 1" (25 mm)
8 3/4" (19 mm)
2/0 1-1/2" (38 mm)
250 kcmil 2" (51 mm)
1/0 1-1/4" (32 mm)
3 1" (25 mm)
4 1" (25 mm)
6 3/4" (19 mm)
3/0 2" (51 mm)
2/0 1-1/2" (38 mm)
1 1-1/4" (32 mm)
3 1" (25 mm)
4 1" (25 mm)
4/0 2" (51 mm)
3/0 2" (51 mm)
1 1-1/4" (32 mm)
3 1" (25 mm)
4 1" (25 mm)
Form No. EBOOSTERM-0406