Alcatel 7750 SR-12, Installation Manual

Page: 71 / 158

Installing Power Supplies
7750 SR-12
Page 69
DC-I
NPUT
P
OWER
W
IRING
P
REPARING THE
P
OWER
C
ABLE
Connect the VCD and RTN studs on the DC terminal block with power cables terminated with
0.250-20 UNC lugs (
Figure 18 and Figure 18 ). The other unterminated end of the power cables
must be prepared according to your local safety codes. The length of the power cable depends on
the location of the router and proximity to the power source.
Figure 17: DC Terminal Block Stud Dimensions and Spacing
Figure 18: DC Terminal Block Lug
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.
• 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.
• Use a #6 American wire gauge (AWG) for the -48 and RTN power connections.
SR12032
3.965 IN.
0.850 IN.
0.740 IN.
0.600 IN.
1.300 IN. 0.750 IN.
1
0.750"
0.250
2 Holes
All measurements in inches.
SR12030