Installing Dc Power Cables Onto A Multiservice Switch 7460 - Nortel 7400 Hardware Installation

Installing dc power cables onto a Multiservice Switch 7460

Prerequisites
Procedure steps
Multiservice Switch 7400 Hardware Installation, Maintenance, and Upgrade 6.1S2
Install dc power cables onto a Nortel Networks Multiservice Switch 7460 to
provide input power to a power supply.
WARNING
Risk of injury by electric shock
Before installing any cables, ensure that the upstream
circuit breakers of the battery (BATT) and battery return
(RTN) cables are toggled off.
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.
WARNING
Damage to equipment by overtightening nuts
The nuts for the studs on the power input terminal block
can be overtightened such that they strip the stud or the
nut. There is no field replacement for a stud, which
means you would have to replace the shelf assembly or
operate with only one power supply. Hand tighten the
nuts as instructed in the procedure.
• Before you install dc power cables, ensure that you have met the
appropriate power requirements that are identified in NN10600-170
Nortel Networks Multiservice Switch 7400 Hardware Description.
1 Connect the dc power cables to the power source. Follow your local
electrical codes for this kind of dc cable connection.
Chapter 39 Hardware procedures 339