Separate wire pairs are attached to a single, normally-open contact in a parallel connection. HP recommends using different colors for the positive and negative wires.

If a connector becomes disconnected and is reconnected with reversed polarity, a REPO is initiated. To avoid REPO port disconnect:

•Minimize wire strain while connecting the REPO port.

•Avoid allowing the wires to hang in the rear of the UPS.

•Use tie wraps and tie wrap blocks to secure the wires tightly to the rack and the rear of the UPS.

For more information about the REPO port, see "REPO port (on page 9)" .

For information about verifying the REPO connection, see "Verifying the REPO port connection (on page 30)" .

Connecting the ground bonding cable

The ground bonding screw is provided as an attachment point for conductors. Use a ground bonding cable if the rack contains any conductors for the purpose of functional grounding or bonding of ungrounded metal parts.

Installation 21