Powerware Ferrups FE/QFE 500VA User Manual
Page 37
External Bypass Switch Installation
31
Powerware
®
FERRUPS FE/QFE UPS (500 VA–18 kVA) Installation Guide
:
Rev A www.powerware.com
2. Review the installation wiring diagram and applicable notes to
find the proper circuit breaker size for your installation. In the
US, see Table 10 to size the wire. In other areas, use 75°C
copper wire and size according to the local code.
Table 10. Recommended Wire Sizes
Input Circuit Breaker Size
75°C Copper Wire Size
15A, 20A
12 AWG (3.3 mm
2
)
25A, 30A
10 AWG (5.3 mm
2
)
35A, 40A, 45A, 50A
8 AWG (8.4 mm
2
)
60A
6 AWG (13.3 mm
2
)
70A, 80A
4 AWG (21.2 mm
2
)
90A, 100A
3 AWG (26.7 mm
2
)
110A
2 AWG (33.6 mm
2
)
125A
1 AWG (42.1 mm
2
)
150A
1/0 AWG (53.5 mm
2
)
FOR US 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.
Conductor sizes shall be no smaller than the 75°C wire size based on the ampacities given in Table 310–16 of the National
Electrical Code, ANSI/NFPA 70-1999, 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.
3. Mount the bypass switch within sight of the UPS. If you do not
have a Powerware bypass switch with an AC disconnect switch
or the fuse box or panel is out of sight, you must install a
separate disconnect switch next to the UPS.
4. Remove the screws in the lower part of the bypass switch front
cover and remove the lower cover panel.
Remove the knockouts or plugs in the bottom of the bypass
switch for AC Line Input, AC to UPS Input, AC from UPS
Output, and AC to the UPS load.