Nortel Networks NN44200-300 manual Bringing power and ground into the PDU, Introduction, Step

Note: To preserve ground integrity, the conduit must be insulated.

Action

42Chapter 4 Power supply installation

Bringing power and ground into the PDU

Introduction

Install BAT/BATRTN wires in pairs. Each pair of wires supplies voltages to a module through a power harness. The module harnesses are installed in the cabinet PDU and connected to the modules at the factory. See "About the power distribution unit" (page 40).

To bring DC power and ground into the PDU

Step

1If you are using a conduit, terminate the 32 mm (1-1/4 in.) or 19 mm (3/4 in.) conduit at the top rear of the cabinet or at the bottom front of the cabinet using the knockouts provided. The number of wire pairs you can run in each conduit depends on the wire gauge.

2Select a power feed with a circuit breaker dedicated to each module, and identify it with an appropriate tag.

3Select a wire size to suit the required feed length from the power source (see "DC wire gauge tables" (page 36)).

4Use pliers to strip 6 mm (1/4 in.) to 13 mm (1/2 in.) of the insulation from one end of all power and ground feed wires.

5Undo the terminal block screws at (-) positions 0, 1, 2, and 3.

6Insert the red wires into terminal block positions 0, 1, 2, and 3.

7Secure the wires in the terminal block by tightening the screws.

8Undo the terminal block screws at (+) positions 0, 1, 2, and 3.

9Insert the black wires into terminal block positions 0, 1, 2, and 3.

10Secure the wires in the terminal block by tightening the screws.

11Select a #10 AWG green wire safety ground and attach it to the cabinet.

12Measure the module ground continuity by touching one multimeter lead to any BATRTN terminal block connector and the other end to the GND terminal block connector. Ensure the measurement is between 0-0.5 ohms.

—End—

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