Electrical Installation

5.Install the conduit adapters. AC input and AC output conductors must be run through separate conduits. UPS output circuits must be installed in dedicated conduit systems and not shared with other electrical circuits.

6.Find the terminal strip inside the bypass switch cabinet. Using the label on the back of the bypass switch access panel and the proper installation wiring diagram, make the terminal strip connections and tighten all connections as specified in Table 2 on page 27. Use copper wire that is the appropriate size for the current draw. Figure 22 shows a sample label.

Figure 22. Bypass Switch Wiring Label

7.After installing bypass switch wiring, torque the screws holding all input and output power conductors to the values specified in Table 2 on page 27.

8.If your UPS has an isolated output, find the proper output neutral-to-ground connection in the output wiring diagrams beginning on page 44.

At the UPS terminals, connect the neutral-to-ground (neutral-to-earth) wire to the proper terminal before making any other connections to the UPS. The neutral-to-ground wire is a green and yellow wire. One end of this wire is already connected to the ground (earth) UPS terminal. Ground terminations, inside the UPS rear panel, are located directly below the line input terminals. Figure 23 shows input and output wiring terminals inside the Powerware 9170 UPS cabinet. Figure 36 on page 45 shows the N-G bond wire connections.

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Powerware® 9170 User's Guide ￿ LTM-1344 B Uncontrolled Copy