Alcatel-Lucent 7705 - DC-Input Power Connections; Wiring the DC Inputs

Installing the Chassis
7705 SAR-M Chassis Installation Guide 91
Figure 21: Attaching the Chassis Ground Connector (Cable Routed Up)
To make the chassis ground connection:
Step 1. Run a single length of #18 AWG wire (minimum) from the ground point (building
ground or equipment ground bus) to the chassis ground stud.
Step 2. Using a wire-stripping tool, strip the insulation from the wire according to local
safety codes and crimp the ring lug to the wire (Figure 19).
Step 3. Remove the Keps nut and star washer from the ground stud on the mounting
bracket.
Step 4. Place a star washer and the ring lug on the ground stud such that the wire is angled
slightly as it runs down the rack upright (Figure 20) or up the rack upright
(Figure 21). Secure the lug with the Keps nut. Tighten the nut to a torque of
8 to 10 lbf-in (0.9 to 1.13 N
.
m) maximum. Do not over-tighten.
Table 16: Chassis Ground Connection Components
Key Description
1 Lance
2 Cable tie
3 Chassis ground stud (4 mm diameter, nominal)
4 Keps nut
5 Star washer
6 Ring lug and chassis ground wire (green/yellow)
22725
7
8
+BattA -BattA +BattB -BattB
External Alarms
BAT A
BAT B
Max, 50 mA
-48/+24 VDC
4 56 3
1
3
2