Powerware Ferrups FE/QFE 500VA User Manual download pdf (Page 37)

External Bypass Switch Installation

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

)

25A, 30A 10 AWG (5.3 mm

)

35A, 40A, 45A, 50A 8 AWG (8.4 mm

)

60A 6 AWG (13.3 mm

)

70A, 80A 4 AWG (21.2 mm

)

90A, 100A 3AWG(26.7mm

)

110A 2AWG(33.6mm

)

125A 1AWG(42.1mm

)

150A 1/0 AWG (53.5 mm

)

This table lists the AWG and mm

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.

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Powerware Ferrups FE/QFE 500VA User Manual Page 37

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