11
Table 11: United States Recommended AWG and mm
2
Wire Sizes
6. Size the UPS output overcurrent protection device (fuse or circuit breaker) according to local code
requirements. Do not exceed the ratings in Table 12. The table below shows the maximum permitted
overcurrent protection device ratings; these are also the ratings recommended for U.S. applications.
Table 12: Maximum Permitted UPS Output Overcurrent Protection Device Rating
7. If your model has an external bypass switch, go on to
below.
If your model has an internal (attached) bypass switch, go to
on page 20.
For this Input
Circuit Breaker
Size...
Use this Size 75° C
Copper Wire
AWG
mm
2
15, 20
12
3.31
25, 30
10
5.26
35, 40, 45, 50
8
8.36
60
6
13.30
70, 80
4
21.15
90, 100
3
26.67
110
2
33.62
125
1
42.11
For U.S. installations, read this Important Note!
This table lists the AWG and mm
2
wire size for each circuit breaker
size shown on the wiring diagrams. The minimum recommended
circuit breaker sizes for each model and voltage application are
listed on the wiring diagrams.
The conductor size shall be no smaller than the 75° C wire size
based on the ampacities given in Tables 310-316 of the National
Electrical Code, ANSI/NFPA 70-1993, and article 220. All circuit
conductors, including the neutral and equipment grounding
conductors, must be the same size (ampacity) wire. Code may
require a larger AWG size than shown in this table because of
temperature, number of conductors in the conduit, or long service
runs. Follow local code requirements.
150
1/0
53.49
33 A
35 A
45 A
60 / 35 A
60 A
80 / 40 A
80 / 45 A
7.5 kVA
27 A
28 A
40 A
48 / 28 A
48 A
70 / 35 A
70 / 40 A
6 kVA
20 A
21 A
30 A
36 / 21 A
36 A
50 / 25 A
50 / 30 A
4.5 kVA
14 A
14 A
20 A
24 / 14 A
24 A
35 / 20 A
35 / 20 A
3 kVA
9 A
10 A
15 A
16 / 10 A
16 A
25 / 15 A
25 / 15 A
2 kVA
230
220
208 only
127/220
127 only
120 and/or
240
120/208
UPS
Model