Communication Server Large System Installation and Commissioning

Installing AC power Page 83 of 456
Communication Server 1000M and Meridian 1 Large System Installation and Commissioning
Figure 28
PDU ground lug locations
4 Connect the safety ground/protective earth wire (insulated ground wire
must be used for system grounding).
a. 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.
b. 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
next as illustrated in Figure 29, connecting all of the columns
together. You can also run a #6 AWG wire from the ground source to
each column individually. If the columns are not bolted together,
physically separated groups of columns should be grounded
individually as shown in Figure 27 on page 81.
Figure 29
AC column ground lug daisy chain connection
553-8993
Ground lugs
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MAIN
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BREAKER
ON ON
ON
PDU
8D53CB
To ground/protective
earth lug of next column
From
ground source
Terminate on
last column
553-8992
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MAIN
CIRCUIT
BREAKER
ON ON
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PDU
8D53CB
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MAIN
CIRCUIT
BREAKER
ON ON
ON
PDU
8D53CB