Liebert PDUTM, Maintenance Manual

Page: 18 / 156

Power and Control Wiring
10
Figure 5 Typical STS2/PDU, one-line diagram, with inline distribution, dual static switch output circuit
breakers
Figure 6 Typical STS2/PDU, one-line diagram, with I-Line distribution, dual static switch output circuit
breakers
The input and output power wire size should be based on the overcurrent protection device, observing
the NEC and local codes.
The STS2/PDU output power, ground and neutral busbars accommodate a wide range of wire sizes.
The STS2/PDU busbars accommodate standard two-hole lugs.
Table 4 Input/output conduit plate specifications
Rating
Maximum Number
of Conduits Size, in.
250A
12 2"
8 2-1/2"
6 3" or 3-1/2"
400-600A
6 2"
4 2-1/2" or 3"
800A
6 2-1/2"
5 3" or 3-1/2"