Lucent Technologies Release 6 manual DC Power Cabinet Approved Ground, Turn Circuit Breakers Off

DEFINITY Enterprise Communications Server Release 6	Issue 5
Installation and Test for Multi-Carrier Cabinets 555-230-112	May 1998
1 Install and Connect Cabinets
Connect DC Power and Ground	Page 1-20

3.DC Power Cabinet Approved Ground

1.At the DC Power Cabinet, connect a 1 AWG (#70) (44 mm2) ground wire to the Ground Discharge Bar. See Figure 1-7.

2.Route the ground wire out of the cabinet and terminate it on the approved ground. The approved ground must be identified with a grounding tag

(FORM 15657NR or equivalent). See ‘Approved‘ Grounds’’ on page 1-23.

4.Connect Main AC Supply to DC Power Cabinet

1.Have a qualified electrician connect AC power leads to the rectifiers in the DC Power Cabinet. Each rectifier should have its own branch circuit. Terminate the leads on the AC INPUT terminal block of each rectifier.

2.Ensure the associated circuit breakers at the AC power panel are OFF.

5.Connect Ground Wires for DC-Powered Systems

! CAUTION:

Do not connect any ground wires from an EPN cabinet to another EPN cabinet or to a PPN cabinet. All ground wires must be terminated at the single-point ground block at the main AC supply (AC mains).

1.Connect a 6 AWG (#40) (16 mm2) wire to the PPN cabinet ground terminal block.

2.Route the wire to the AC mains single-point ground block and connect.

3.Connect a 6 AWG (#40) (16 mm2) wire to each EPN’s cabinet ground terminal block.

4.Route the wire(s) to the AC mains single-point ground block and connect.

6.Turn Circuit Breakers Off

The main circuit breaker on a DC-powered PPN/EPN cabinet is located on the front of the power distribution unit. The circuit breakers on the rear of the power distribution unit control the individual carriers. See Figure 1-4 for the location of the carrier breakers.

1.Set the main circuit breaker to OFF.

2.Set the carrier circuit breakers to OFF.