Avaya MCC1 Installation And Upgrades page 352

Install and Connect MCC1 (Multicarrier) Cabinet
Task List: Connect DC Power and Ground
Figure 100: Typical Power and Ground for a Mixed AC/DC-Powered Cabinet
Approved
ground
Coupled
bonding conductor
Return to Task List
Connect Remote Power Off Cable
Return to Task List
Figure 101, Remote Power Off Cable Connections — Part 1,
Remote Power Off (RPO) cable. The opposite end of the cable connects to the Emergency Power Off
(EPO) switch located outside of the equipment room.
Even though the equipment room EPO switch disconnects main AC power to the equipment room, it
cannot disconnect the battery power from the J58890CH. An auxiliary set of contacts inside the EPO are
used for this function.
1
Plug the RPO cable into the connector shown in
Connections — Part 1,
2
Route the opposite end of the wires to the EPO switch. The opposite end of the RPO cable
connects to the internal relay.
NOTE:
The EPO switch and the auxiliary contacts (inside the EPO switch assembly) are
customer-provided.
CAUTION:
The auxiliary contacts inside the EPO switch assembly must close when the switch is
pressed. This contact closure energizes the relay inside the power distribution unit,
causing the connection to the battery holdover assembly to open.
352
2
1 AWG (44 mm ) up to
50 feet (15.2 m) or engineered for
less than 0.5 volt drop per conductor
Ground
75A
discharge
-48V
bar
System
single-point
ground
DC power
supply
To CBC terminal
block at MDF
on page 353.
To AC
power source
-48V -48V RTN
PPN
cabinet
on page 353 shows the location of the
Figure 101, Remote Power Off Cable
SI Installation and Upgrades
AC power cord
AC power-
distribution unit
EPN
cabinet
Cabinet
ground block
cydfacdc KLC 032999
June 2004