Connect Ac Power To Stratum 3 Clock Cabinet; Check And Connect Commercial Ac Power; Connect Dc Power And Ground To Stratum 3 Clock Cabinet; Connect Clock Cabinet Grounding - Avaya S8700 Installing

178 Installing the Avaya™ S8700 Media Server with Avaya™ MCC1 or SCC1 Media Gateway
Installing the Stratum 3 clock (if used)

Connect AC Power to Stratum 3 Clock Cabinet

The clock cabinet requires a 120 VAC, 15 amp receptacle. The green wire ground provided by
the receptacle is sufficient. The clock cabinet does not require a ground connection back to the
single-point ground.

Check and Connect Commercial AC Power

Before powering up the media gateway, check the AC power using a KS-20599 digital
voltmeter (DVM) (or equivalent).
1 Set the DVM to the 250 volt range.
Carefully measure the voltage between the hot and neutral side of the receptacle. The
2
neutral wire is white, the hot wire is black.
3 Verify the meter reads 106 to 128 VAC. If not, have a qualified electrician correct the
problem.
4 Measure the voltage between the neutral and ground side of the receptacle. The ground
wire is green.
5 Verify the meter reads 0 VAC. If not, have a qualified electrician correct the problem.
6 Set all cabinet power modules OFF. Plug the AC power cable into the receptacle.
Connect DC Power and Ground to Stratum 3
Clock Cabinet
Provide power for the clock cabinet from the same DC power plant as the media gateway.
Ground the clock cabinet to the DC power plant.

Connect Clock Cabinet Grounding

1 Measure and cut a 6 AWG (#40) (16 mm
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.
Attach the lug to the receptacle cover. Be sure the lug and cabinet ground wires connect
3
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
on the terminal strip.
2
) wire long enough to reach from the clock
2
) ground wire to the -48V terminal
May 2003