Alcatel-Lucent 7450 ESS-1, Installation Manual

Page: 56 / 92

Wiring for DC-Input Power
Page 56 7450 ESS-1
Wiring for DC-Input Power
Use the following American wire gauge (AWG) specifications for power connections:
• Not less than #14 AWG and not more than #12 AWG for the -48 and RTN
• #14 AWG for the ground wire
DC Input Terminal Block Wiring
The DC power supply cables attach to the power supply terminal studs. Figure 12 , Figure 13 , and
Figure 14 display DC-input terminal block safety cover and wiring views.
Figure 12: Removing the DC Terminal Block Safety Cover
Warning:
• Ensure that all power is OFF from the DC circuit. Locate the circuit breaker on the panel board
that services the DC circuit. Switch the circuit breaker to the OFF position. For extra safety, you
can tape the handle of the circuit breaker in the OFF position.
• When wiring the unit, the ground connection must always be made first and disconnected last.
• The proper wiring sequence is ground/negative to ground/negative and positive/return to
positive/return.
SR10029