Chapter 39 Hardware procedures 335
Multiservice Switch 7400 Hardware Installation, Maintenance, and Upgrade 6.1S2
Installing dc power cables onto a Multiservice Switch 7420
Install dc power cables to provide power to a Nortel Networks Multiservice
Switch
7420.
Prerequisites
• Before you install dc power cables, ensure that you have met the
appropriate power requirements. For information, see NN10600-170
Nortel Networks Multiservice Switch 7400 Hardware Description.
Procedure steps
1 Route the dc power cables to the rear of the device.
2 Determine the length of the wires you require, and cut them to the
appropriate length.
3 Attach wire lugs to the ends of the wires.
4 Remove the plastic cover from the terminal block.
5 Connect the -48/60 V dc and return wire lugs to the terminal block at the
rear of the shelf assembly. See the figure
“Multiservice Switch 7420 dc
power cables” (page 336).
6 To ensure that the power cables are firmly secured and will not move or
slip, use a strain relief clip. The strain relief clip can be mounted on the
rear of the device, below the power supply terminal block.
WARNING
Risk of injury by electric shock
Before installing any cables, ensure that the circuit
breaker at the power distribution panel is toggled off and
that the outlet is void of primary power.
WARNING
Damage to equipment; safety hazard
Protect the power feeds to the dc power supply as
described in NN10600-170 Nortel Networks Multiservice
Switch 7400 Hardware Description. Failure to protect the
power feeds can damage the equipment and pose a safety
hazard.
To Next Page
