Nortel Networks 1000M - Manual (Page 134)

134 Installing the system ground
Procedure 13
Earthing the cabinets or chassis (UK)
Step Action
1 Connect a protective and functional earth wire from the earthing strip
on the Krone Test Jack Frame to the earth at the building entry point.
Use a green/yellow wire no thinner than 10 mm 2 (3/8 in.).
2 In each cabinet or chassis, connect an earth wire from the ground
lug in the cabinet (see
Figure 55 "Ground/Earth lug in the NTAK11
system cabinets" (page 131) ) or chassis (see Figure 56 "Grounding
a chassis and chassis expander pair" (page 132) ) to the earth
connection at the Test Jack Frame.
Use a green/yellow wire no thinner than 10 mm 2 (3/8 in.). For the
Cabinet system, route the earth wire through the third groove from
the left in the bottom portion of the cabinet.
Place a DO NOT DISCONNECT tag on the earthing wire.
3 Measure the resistance of the earth between the Krone Test Jack
Frame and the Main Cabinet or Chassis frame earth.
The resistance must not be more than 0.25 ohms at 30 amperes.
—End—
Multiple pieces of equipment in an equipment rack/cabinet
For a Chassis system with multiple pieces of equipment installed in an
equipment rack/cabinet, make a separate ground connection from each
piece of equipment to the NTBK80 grounding block. Consider each chassis
and chassis expander pair, however, as one ground. Jumper the chassis
expander ground to the chassis ground. See
Figure 58 "Grounding multiple
pieces of equipment in a rack" (page 135) .
If a piece of Data Communication Equipment installed in a rack/cabinet
does not have a grounding lug, ground the rack to the NTBK80 grounding
block. See
Figure 58 "Grounding multiple pieces of equipment in a rack"
(page 135) .
When you ground the rack to the grounding block, the equipment is
grounded using the Single Point Grounding method, as shown in the
grounding requirements in the chapters on system and site requirements
in Communication Server 1000M and Meridian 1 Small System Planning
and Engineering (NN43011-220).
Nortel Communication Server 1000
Communication Server 1000M and Meridian 1 Small System Installation and Commissioning
NN43011-310 01.04 Standard
Release 5.0 13 May 2008
Copyright © 2008, Nortel Networks
.