Grounding When Not Using A Nebs 2000 Frame; Grounding When Using Ac Rectifiers As A Power Source; Prerequisites To Installing Dc Power Input Cables - Nortel Passport 15000 Preparation Manual

Grounding when not using a NEBS 2000 frame

Normally, the bonding of the metalwork of the hardware parts to the frame
(with or without the conductive tape on the uprights) by the self-tapping bolts
(provided), grounds the hardware to the frame. Ground your Passport 15000
or 20000 by this method provided the frame is appropriately grounded to the
site's ground window. The frame ground to the site's grounding window is
identified by the universal ground icon across the top of the NEBS 2000 frame
(NTRU04).
When installing the BIP in a frame other than an NTRU04 (that is, lacking
conductive tape or is entirely painted), a secondary grounding point is
provided in the BIP chassis. There are 2 studs at the rear lower right of the
chassis. Ground the BIP chassis to the frame reliably by firmly attaching a
ground of minimum size 6 AWG cable E/W (13.3 mm
and a common grounding point. Use two straight 2-hole lugs, one to the
chassis and the other to the frame ground bonding point. The stud nuts on the
chassis are number 10-32 unc and are included with washers on the studs.
There is no metric equivalent to the stud nuts. Use star washers between the
lug and the frame. Do not overtighten the nuts.
Grounding when using ac rectifiers as a power source
When installing a system of ac rectifiers such as an Astec MFA150 power
system to provide dc power to the Passport 15000 or 20000, ground the frame
and the framework to the same ground window. Also, ground both by similar
methods, for example, as described in "Grounding the frame in CPE or a CO"
(page 138).
For more information on grounding an MFA150, see 167-9021-133
Advanced Power Systems MFA150 Modular Front Access Power System
Detailed Installation Guidelines and Procedures Manual.

Prerequisites to installing dc power input cables

Installing dc power cables for the BIP means routing the cables from the
power source to the BIP or the frame's floor footprint without connecting
either end. Dressing the cables onto the NEBS 2000 frame and connecting to
the BIP or power-and-ground cable assembly is handled in the appropriate
sequence by an installation task flow. Because of the lead time recommended
to schedule a qualified electrician, the task flows accommodate installing the
cables before the switch hardware arrives.
Passport 15000, 20000 Site Requirements and Preparation Guide
Chapter 4 Power and grounding preparation 141
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) between the studs
5.2S2