Universal I/O Chassis 11
Publication 1771ĆIN075A-EN-P - March 2002
equipment
grounding
conductors
ground
lug
bolt
star
washer
Grounding electrode
conductor to grounding
electrode system
tapped hole
ground bus
ground bus
mounting
13271
10020
Enclosure
Wall
Equipment-Grounding
Conductor
Scrape
Paint
Star
Washer
Nut
Ground
Lug
Scrape paint on enclosure wall
and use a star washer.
Bolt
Functional Ground
• use 2.54cm (1in.) copper braid or 10.0mm
2
(8 AWG) copper wire to connect
each chassis, the enclosure and a central ground bus mounted on the
backĆpanel
• use a steel enclosure to guard against electromagnetic interference (EMI)
• make sure the enclosure door viewing window is a laminated screen or a
conductive optical substrate (to block EMI)
Protective Earth Ground
• use a 2.5mm
2
(14 AWG) copper wire for the equipment grounding conductors
• install a bonding wire [2.5mm
2
(14AWG) minimum] for electrical contact
between the door and the enclosure; do not rely on the hinge
IMPORTANT
Do not lay one ground lug directly on top of the other; this
type of connection can become loose due to compression
of the metal lugs.
Place the first lug between a star washer and a nut with a
captive star washer.
After tightening the nut, place the second lug between the
first nut and a second nut with a captive star washer.
Connect an equipment grounding conductor directly from each
chassis to an individual bolt on the ground bus.
a ground stud the grounding stud
Comments to this Manuals