8
Note Because the power requirement of the SCE8000 will not exceed 1350 W, it is not necessary to connect two pairs of input
wires to each power supply. If you want to connect two pairs of input wires, both pairs of input wires for one 2700 W
DC-input power supply must come from the same battery system (A feed); and both pairs of input wires for the other
power supply must come from another battery system (B feed).
Note For multiple DC input power supplies, each DC input must be protected by a dedicated circuit breaker or fuse. The
circuit breaker or fuse should be sized according to the power supply input rating and local or national electrical code
requirements.
Step 1 Power supply ground is required. Install the PWR-2700-DC/4 power supply ground as described in this procedure.
Note The system ground connection with the PWR-2700-DC/4 power supply in a Cisco SCE 8000 is provided by the
PWR-2700-DC/4 power supply ground. Additionally, you can connect a system (earth) ground.
Note You must always connect the PWR-2700-DC/4 power supply ground.
Note You must always connect the PWR-2700-DC/4 power supply ground for both power supplies.
Note If you intend to use an additional system (earth ground), ensure that the system ground connection is made. For
ground connection installation instructions, see the “Connecting the Chassis Ground” section on page 6.
Step 2 Remove the plastic bag attached to the front panel and put aside. This bag contains two plastic terminal block barriers,
two cable ties, and two cable holder covers.
Step 3 Verify that power is off to the DC circuit connected to the power supply you are installing. Grasp both power supply
handles (Figure 5.) Slide the power supply into the power supply bay. Make sure that the power supply is fully seated
in the bay.
Figure 5 Handling a DC-Input Power Supply
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