Installing Dc Power Cables Onto A Multiservice Switch 7420 - Nortel Multiservice Switch 7400 Installation & Maintenance

Installing dc power cables onto a Multiservice Switch 7420

Install dc power cables to provide power to a Nortel 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 Multiservice Switch 7400 Hardware Description.
Procedure steps
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Copyright © 2005, Nortel
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Hardware procedures
DANGER
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.
CAUTION
Damage to equipment; safety hazard
Protect the power feeds to the dc power supply as described in
NN10600-170 Nortel Multiservice Switch 7400 Hardware
Description. Failure to protect the power feeds can damage the
equipment and pose a safety hazard.
Action
Route the dc power cables to the rear of the device.
Determine the length of the wires you require, and cut them to the
appropriate length.
Attach wire lugs to the ends of the wires.
Remove the plastic cover from the terminal block.
Connect the -48/60 V dc and return wire lugs to the terminal block at the rear
of the shelf assembly. See the figure
cables (page 265).
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.
Replace the plastic cover on the terminal block.
Connect the cables from the disconnect device to the power source.
Nortel Multiservice Switch 7400
Hardware Installation, Maintenance, and Upgrade
NN10600-175 7.1S1 Standard
PCR7.1 and up October 2005
Multiservice Switch 7420 dc power
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Nortel Confidential