Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 365 / 874

Chapter 17 Hardware procedures 365
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
Grounding a Shasta 5000 to a NEBS 2000 frame
Ground a Shasta 5000 to a NEBS 2000 frame to ensure that the setup shares
the same ground window.
Prerequisites
• You must be familiar with “Safety considerations and best practices”
(page 53).
• Before grounding the Shasta 5000, ensure that you have done the
procedure “Grounding the NEBS 2000 frame” (page 368).
Procedure steps
1 Cut 152 cm (5 ft.) of No. 6 AWG (13 mm
2
) cable for grounding.
2 As shown the figure “Shasta 5000 shelf assembly grounding studs”
(page 366), use a straight 2-hole lug to connect one end of the grounding
cable to both grounding studs on the rear of the shelf assembly.
3 Route the grounding cable from the Shasta 5000 to the nearest upright.
4 Route the cable along the upright up to the top of the frame where the
silvery grounding strip is located. To locate the grounding strip, see the
figure “Location of the grounding strip at the top of NEBS 2000 frame”
(page 367). Use tie-wraps to loosely fasten the cable to the cable
management brackets.
5 Choose a pair of dimples in the silvery grounding strip across the top rear
of the frame where the 2-hole lug of the grounding cable will fasten. Each
dimple pair covers unthreaded screw holes. Puncture the dimples at the
2 holes.
Do not use the grounding holes behind the safety label.
6 At the point of the dimple pair, cut off any excess cable, strip the sheath
off the end to accommodate the lug barrel, coat the exposed strands in
anti-oxidizing grease, and crimp on a straight No. 6 AWG (13 mm
2
) 2-hole
lug. The lug holes must align with the dimple pair without causing the
cable to exceed the maximum bend radius and without looping any cable
slack.
7 Fasten the lug to the frame using 2 thread-forming 10-mm (3/8-in.) hex-
head screws from the hardware kit NTHW85. Tighten to snug plus a 1/3
turn.
8 Tighten the tie-wraps along the cable path.