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Page 19 of 40
Bulletin
441G
TABLE 5. Electrical Service For Single Phase Operation 230 Volt
COPPER WIRE SIZE DISTANCE MOTOR
TO DISCONNECT IN FT. UP TO
MOTOR H.P.
TRANSFORMER
SIZE (NOTE B)
(MINIMUM)
0'-50' 100' 200' 300'
CARTRIDGE TYPE
FUSETRON OR
EQUIVALENT
TIME DELAY FUSE
AMP
1.5 2.5
KVA
14
12
10
8 15
3 4.5
KVA
12
10
6
5 30
5 8.5
KVA
8
6
4
3 50
7.5 10.0
KVA
6
6
3
1 60
10 13.0
KVA
6
4
2
1/0 70
12.5 16.0
KVA 4
2
00
000 80
TABLE 6. Electrical Service for Three Phase Operation 230/460 Volt
COPPER WIRE SIZE DISTANCE MOTOR TO
DISCONNECT IN FT. UP TO
CARTRIDGE
TYPE
FUSETRON OR
EQUIVALENT
TIME DELAY
FUSE AMP
0'-50' 100' 200' 300'
MOTOR
H.P.
TRANSFORMER
SIZE (NOTE B)
(MINIMUM)
230 460 230 460 230 460 230 460
230 460
1.5
2.5
KVA
14 14 14 14 12 14 10 12 10 5
3
4.5
KVA
14 14 12 14 10 12 8 10 15 8
5
8.5
KVA
12 14 10 12 6 10 4 8 30 15
7.5
10.0
KVA
10 14 8 12 6 8 4 6 40 20
10
13.0
KVA
10 12 8 10 4 8 2 6 50 25
12.5
16.0
KVA
48 12 6 10 2 6 1 4 60 30
TABLE 7. Electrical Service for Three Phase Operation 575 Volt
COPPER WIRE SIZE DISTANCE MOTOR TO
DISCONNECT IN FT. UP TO
MOTOR H.P.
TRANSFORMER
SIZE (NOTE B)
(MINIMUM)
0'-50' 100' 200' 300'
CARTRIDGE
TYPE FUSETRON
OR
EQUIVALENT
TIME DELAY
FUSE AMP
1.5 2.5
KVA
14
14
14
14 4
3 4.5
KVA
14
14
12
12
8
5 8.5
KVA
14
12
10
8
10
7.5 10.0
KVA
14
12
8
8 15
10 13.0
KVA
12
12
8
6 20
12.5 16.0
KVA
12
10
6
4 25
NOTE A:
Always check current local, state, and national codes on electrical requirements
before installing any electrical equipment.
NOTE B:
Transformer size is based on current draw from the fan only. Your electrician
will need to add the KVA requirements for other components of the system in
sizing the transformer.
NOTE C:
Copper wire (rated 75
°
C) is sized for the fan service. The wire size from the
transformer to the disconnect service will be determined from the fan and the
other electrical equipment requirements.
Summary of Contents for Caldwell AF12-751
Page 2: ...Page 2 of 40 Bulletin 441G ...
Page 23: ...Page 23 of 40 Bulletin 441G Figure 16 Wiring Schematic for AF12 751 Fan ...
Page 24: ...Page 24 of 40 Bulletin 441G Figure 17 Wiring Schematic for AF18 11 Fan ...
Page 25: ...Page 25 of 40 Bulletin 441G Figure 18 Wiring Schematic for 230 Volt Single Phase Axial Fan ...
Page 26: ...Page 26 of 40 Bulletin 441G Figure 19 Wiring Schematic for 230 Volt Three Phase Axial Fan ...
Page 27: ...Page 27 of 40 Bulletin 441G Figure 20 Wiring Schematic for 460 Volt Three Phase Axial Fan ...
Page 38: ...Page 38 of 40 Bulletin 441G NOTES ...
Page 39: ...Page 39 of 40 Bulletin 441G NOTES ...
Page 40: ...Page 40 of 40 Bulletin 441G ...