Electrical Installation

The Generator On signal is isolated from line voltage and can be treated as NEC Class 2 wiring.

Use 14￿20 AWG, 600V wire (UL) or 14￿26 AWG, 300V wire (CSA) for all input control signals.

Generator On

(Normally Open)

Signal

Common

Plastic Cable Tie

Emergency Power-Off (Normally Closed)

External Bypass *(Short to Common When Active)

Generator Set

Figure 24. Input Control Signal Wiring

12.Place the signal wires through the proper conduit or grommet above the terminal block and attach to appropriate terminals. Secure each connection by torquing terminal screws to a maximum 3.5 in lb (0.4 Nm). Provide strain relief for cables by installing plastic cable ties.

NOTE Do not strain relieve EPO or external bypass wiring with the same cable tie used for Generator On wires.

13.Remove the jumper between terminals 5 and 6 only if you are wiring from an emergency power-off (EPO) switch. (See •Changing Parameter Settings" on page 65 for information about accessing menu 7, submenu 1, item 9 to view or change the EPO switch type.)

14.When all connections have been made and checked, replace the bypass switch front panel and UPS cabinet rear panels.

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