Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 837 / 874

Chapter 17 Hardware procedures 837
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
Procedure steps
1 Remove the rear plate at the bottom of the rear half of the NEBS 2000
frame by unfastening the 4 screws.
2 At a workbench, remove a 5-cm (2-in.) knockout disk from the plate by
• clamping the plate to the edge of a bench so that it does not move
and so that the disk is over open air
• pressing on an unfastened edge of the disk until you can pivot it in the
opening
• wobbling the disk back and forth until it detaches
• filing the burrs off the top and bottom edges of the opening
3 If you are using conduit, test fit the plate so that the conduit just passes
the lip of the knocked out hole. If the location of the hole is inconvenient
for routing the cables, swap the positions of the plates.
4 Facing the rear of the frame, route a power cable through the opening of
the bottom plate. Pass the cable through a hole in the plate. Leave the
plate unfastened for easier cable manipulation.
5 Facing the rear of the frame, route the cable through the right rear side
opening as shown in the figure “Power cabling to the BIP from the floor”
(page 841).
6 Route the cable up along the frame to the BIP. Plan nesting your cables
because the other 3 or 7 cables will run parallel to it.
7 Fasten the cable securely on the zig-zag bars of the frame with tie-wraps
having a minimum width of 0.5-cm (3/8-in.). The tie-wraps must not
overlap the outermost side of the frame uprights when supporting power
cables, as shown in the figure “Power cabling to the BIP from the floor”
(page 841). This would interfere with the optional frame-to-frame brackets
for joining 2 frames.
CAUTION
Risk of equipment damage by fire
A bent bottom plate leaves an opening into the frame area
which reduces the fire proofing effect of the
Passport 15000 or 20000 in a NEBS 2000 frame.