User's Manual

260-668066-003 Rev 001 August 2010 6-13
Eclipse Installation Manual
Installing an INU
Procedure
1. Fit the rack mounting ears to the chassis with the grounding stud to left or right side
for the most direct ground wire path to the rack ground bar.
2. Locate the INU/INUe in the equipment rack and secure it using four No.12 Phillips
dome-head screws from the IDC installation kit.
3. Where NEBS compliance is required, install the power line filter unit. Install
immediately below or above the INU. Separate filter units are required for the NCC
and, where fitted, the NPC. Use the supplied 2w2 to 2w2 cable to connect the
output of the filter unit to the input of the NCC or NPC.
4. Ground the INU/INUe from the grounding stud to the rack/frame ground bar
using a length of 4 mm
2
(AWG 12) green PVC insulated stranded copper wire with
a suitably sized ground lug at each end (supplied by the installer).
•For NEBS compliance, 16 mm
2
(AWG 6) green PVC insulated stranded copper
wire is required together with a star washer under the grounding screw. Torque
the INU grounding post screw to 1.2-1.5 Nm (10-13 in-lbs).
5. If the equipment rack/frame requires grounding, use 16 mm
2
(AWG 6) wire from
its ground bar to the station ground.
Do not assume that an existing rack or mounting frame is correctly
grounded. Always check the integrity of the ground connections, which
must include a check through to the master ground for the station, which
should be located at the point of cable entry to the equipment building.
For NEBS compliance:
- All bare conductors must be coated with an appropriate antioxidant
compound before crimp connectors are fitted.
- All unplated connectors, braided strap, and bus bars must be brought
to a bright finish and then coated with an antioxidant before they are
connected. This does not apply to tinned, solder-plated, or silver-plated
connectors and other plated connection surfaces – but all must be clean
and free of contaminants.
- All raceway fittings must be tightened to provide a permanent
low-impedance path.
6. Install the plug-ins in their assigned slot positions, and check that their front panels
are flush-fitted (not protruding) and held secure by their fasteners. Ensure unused
slots are covered by blanking panels. Refer to .