Communication Server Large System Installation and Commissioning

Installing DC power Page 123 of 456
Communication Server 1000M and Meridian 1 Large System Installation and Commissioning
Installing the Four-Feed PDU
Installing the NT4N49AA PDU is a two-step process. It involves:
1 Installing safety ground/protective earth wiring on page 123
2 Connecting power from the power plant to the PDU on page 125
Note: For installation in the UK, refer to the procedure “Connecting UK
power to the Four-Feed PDU” on page 129.
Installing safety ground/protective earth wiring
Procedure 8
Installing safety ground/protective earth wiring
1 Remove the associated 30 A fuse or set circuit breakers to the OFF
position in the power plant to disconnect each pedestal from the power
source.
2 Remove the air intake grill from the rear of the pedestal.
3 At the rear of the pedestal, use a Phillips screwdriver to remove the metal
cover over the terminal block to access the safety ground/protective earth
lugs. Leave the cover off until all pedestal connections are made.
4 Connect the safety ground/protective earth wire.
• For a single-column system, connect a #6 AWG wire from the
ground source in the service panel to a ground lug on the pedestal.
• For a multiple-column system, connect a #6 AWG wire from the
ground source in the service panel to a ground lug on the closest
column. Daisy-chain #6 AWG ground wires from one pedestal to the
CAUTION
System Failure
Failure to follow grounding procedures can result in
unsafe or faulty equipment. See Communication
Server 1000M and Meridian 1: Large System
Planning and Engineering (NN43021-220) for a
complete description of approved ground sources
and methods.