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DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Install and Connect Cabinets
Page 1-28Connect DC Power and Ground to Stratum 3 Clock Cabinet
1
Connect DC Power and Ground to
Stratum 3 Clock Cabinet
1. Provide power for the clock cabinet from the same DC power plant as the
DEFINITY System.
2. Ground the clock cabinet to the DC power plant.
Connect Clock Cabinet Grounding
1. Measure and cut a 6 AWG (#40) (16 mm
2
) wire long enough to reach from
the clock cabinet to the ground discharge bar in the DC power plant.
2. Insert 1 end of the wire into the ground lug on the clock cabinet and
tighten the screw.
3. Attach the lug to the receptacle cover. Be sure the lug and cabinet ground
wires are connected to separate screws on the receptacle cover.
4. Route the ground wire to the DC power plant and connect to DISCH GRD
inside the cabinet.
Connect Stratum 3 Clock DC Power
1. Set the clock cabinet circuit breaker at the DC power plant OFF.
2. At the clock cabinet, connect a 6 AWG (#40) (16 mm
2
) ground wire to the
-48V terminal on the terminal strip.
3. At the clock cabinet, connect a 6 AWG (#40) (16 mm
2
) wire to the
-48VRTN terminal on the terminal strip.
4. Route the wires out of the cabinet and to the DC power plant.
5. At the DC power plant, connect the -48V wire to the DC OUTPUT circuit
breaker.
6. At the DC power plant, connect the -48VRTN wire to the DISCH GRD bar.