Baldor 22H series, Installation & Operating Manual

Page: 22 / 140

Section 1
General Information
Receiving & Installation 3-11 MN722
Wire Size and Protection Devices
Table 3-5 lists the recommended wire size and the breaker or fuse size for each control.
The specified wire sizes and protective devices are based on the maximum output power
possible from the control. If the control is programmed for an operating zone that
provides less output power, the wire size and the rating of the protective devices may be
reduced but must meet NEC and other applicable codes.
Table 3-5 Wire Size and Protection Devices - 230 VAC Controls
Control O tp t Inp t Breaker Inp t F se Wire Ga ge Control Output
P R ti
Input Breaker Input Fuse Wire Gauge p
Power Rating
p
Fast Acting Time Delay AWG mm 2
10 35A 40A 35A 10 10
15 50A 60A 50A 8 10
20 60A 80A 60A 4 25
25 80A 100A 80A 4 25
30 100A 125A 100A 3 30
40 125A 150A 125A 1 50
50 150A 200A 150A 2/0 70
Note: All wire sizes based on 75
°
C copper wire, 3% line impedance. Higher temperature smaller gauge wire may be
used per NEC and local codes. Recommended fuses/breakers are based on 25
°
C ambient, maximum
continuous control output current and no harmonic current.
Table 3-6 Wire Size and Protection Devices - 460 VAC Controls
Control O tp t Inp t Inp t F se Wire Ga ge Control Output
P R ti
Input
B k
Input Fuse Wire Gauge p
Power Rating
p
Breaker
Fast Acting Time Delay AWG mm 2
10 20A 25A 17.5A 12 4
15 25A 30A 25A 10 6
20 30A 40A 30A 8 10
25 40A 50A 40A 8 10
30 45A 60A 45A 6 16
40 60A 80A 60A 4 25
50 70A 100A 75A 4 25
60 90A 125A 90A 2 35
75 125A 150A 125A 1/0 54
100 150A 200A 150A 2/0 70
125 175A 250A 175A 2/0 70
150 200A 300A 200A 4/0 120
200 250A 350A 250A (2)1/0 (2)54
250 350A 450A 350A (2)3/0 (2)95
300 400A 500A 400A (2)4/0 (2)120
350 500A 600A 500A (3)4/0 (3)120
400 600A 800A 600A (3)250 mcm (3)125
450 600A 800A 600A (3)250 mcm (3)125
Note: All wire sizes based on 75
°
C copper wire, 3% line impedance. Higher temperature smaller gauge wire may be
used per NEC and local codes. Recommended fuses/breakers are based on 25
°
C ambient, maximum
continuous control output current and no harmonic current.