Polycom SpectraLink 6300 MCU - Manual (Page 35)

PN: 1725-36121-001_J.doc 35
Connect Power to Shelves
SpectraLink recommends that a licensed electrician install the -48V
DC power supply.
When connecting the -48 V DC system to power, note the following
precautions:
A 30 amp circuit breaker must be present on the non-grounded DC
circuit conductor, and the installer must ensure that means are
provided for connection of the equipment to the DC source by
permanent wiring methods, and no disconnecting device is located
in the grounded DC circuit conductor between the point of
connection to the supply and the point of connection to the
grounding electrode and equipment grounding conductors.
The DC input to the power supply is polarity sensitive. Incorrect
hookup will prevent normal operation of the system and may cause
damage. Double check polarities before making any connections.
Verify that the DC power switch on the shelf is off.
Run Conduit To Shelf
The shelves have two possible points of entry for conduit: on the side,
used for wall-mounted shelves, or in the rear, used for rack-mounted
shelves.
Select the point of entry (side or rear) for this installation and unplug
the correct opening on each shelf to be installed.
For each shelf:
1. Attach the conduit entry hardware (condulet) to the conduit.
2. Pull the conduit through the hole.
3. Connect the wires to the terminals.
Connect the wire to the terminal strip and grounding stud, as shown
in the following illustration. Position the wires to be flat against the
back of the shelf.
4