Connect Dc Power And Ground; Task List: Connect Dc Power And Ground - Avaya MCC1 Installation And Upgrades

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Connect AC Power
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1
Set the main circuit breakers on the power distribution unit OFF.
2
Connect cabinet AC line cords to the AC power receptacles.
NOTE:
Do not power up the system at this time.

Connect DC Power and Ground

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CAUTION:
Grounding of the system shall comply with the general rules for grounding contained in
Article 250 of the National Electrical Code, NFPA 70. For more information, refer to
Approved
The grounding methods for the DC-powered system are more complex than that of an AC-powered
system.
Figure 95, Typical Power and Ground for a DC-Powered Cabinet,
ground layout for a DC-powered cabinet. The size of the wire required for the -48 volt DC and -48 volt
return must ensure the voltage supplied by the battery plant is maintained between -42.5 and -54.2 volts
DC at all times for proper operation and to prevent hardware damage. The wire must be sized for a
maximum voltage drop of 0.5 VDC in each leg of the DC distribution. This procedure applies to both
PPN and EPN cabinets.

Task List: Connect DC Power and Ground

Perform these tasks to connect DC power and ground, power distribution unit (J58890CH-1 Only):
1
Install Rectifier Modules and Battery Interface Unit
2
Connect Power and Ground(s)
Perform these tasks to connect DC Power and Ground (J58890CF Only):
NOTE:
These installation tasks correspond to the numbers in
Ground for a DC-Powered Cabinet,
1
Install Coupled Bonding Conductor Wires
2
Connect DC Battery and Power Cabinet Grounds
3
Connect DC Power Cabinet Approved Ground
SI Installation and Upgrades
June 2004
Grounds.
on page 344:
Install and Connect MCC1 (Multicarrier) Cabinet
Connect DC Power and Ground
on page 344 shows a typical power and
Figure 95, Typical Power and
343