Nortel Passport 7400, Hardware Installation, Maintenance, And Troubleshooting, Page: 268 / 438

268 Chapter 37 Hardware procedures
241-7401-240 5.2S1
Installing dc power cables in a 3-slot Passport switch
Install dc power cables to provide power to the switch.
Prerequisites
• Before you install dc power cables, ensure you have met the appropriate
power requirements. For information, see 241-7401-200 Passport 7400
Hardware Description.
Procedure steps
1 Route the dc power cables to the rear of the switch.
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 “3-slot Passport switch dc power
cables” (page 269).
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 switch, below the power supply terminal block.
7 Replace the plastic cover on the terminal block.
8 Connect the cables from the disconnect device to the power source.
WARNING
Risk of injury by electric shock
Before installing any cables, ensure that the circuit
breaker at the power distribution panel is turned 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 241-7401-200 Passport 7400 Hardware
Description. Failure to protect the power feeds can
damage the equipment and pose a safety hazard.