3Com 4200G Getting Started Manual page 31

Connecting the
Switch to the
Redundant Power
System
Each RPS consists of a shelf that can house from one to six rectifiers, a
Distribution Module, and a Management Module.
When connecting the RPS to the switch, the circuit breaker and 2-core
cables need to be matched to the switch's power rating. Table 8 shows
the recommended circuit breaker and cable rating for the Switch 4200G.
The recommended cable length should not exceed three metres (9.84
feet).
Table 8 Switch 4200G Circuit Breaker and Cable Ratings
Circuit Breaker Minimum 2-Core Cable Diameter
Non PoE 6A C type
PoE 25A C type
WARNING: Make sure to follow the RPS Manufacturer's
recommendations when connecting the cable to the RPS.
WARNING: Ensure that the circuit breaker in the RPS is in the open (off)
position when connecting the cable to the RPS and the cable and
connector to the switch.
WARNING: Ensure that the positive terminal on the switch is connected
to the positive (common) terminal of the RPS and that the negative
terminal on the switch is connected to the negative (circuit breaker)
terminal of the RPS.
Figure 10 shows how to connect the power supply to the RPS socket in
the back of the switch. Use the cable tie supplied with your switch to
support the cable in the back of the RPS connector as shown in Figure 10.
Connecting a Redundant Power Supply
18 AWG (solid or stranded cable)
12 AWG (solid or stranded cable
31
)