AB Quality Series B Installationsanleitung Seite 11

Connect Equipment Grounding Conductor to Ground Bus
Connect an equipment grounding conductor directly from each chassis to an
individual bolt on the ground bus.
equipment
grounding
conductors
• use 2.54 cm (1in) copper braid or 5.2 mm2 (10 AWG) copper wire to connect each chassis, the enclosure,
and a central ground bus mounted on the back-panel
• 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)
• install a bonding wire for electrical contact between the door and the enclosure; do not rely on the hinge
IMPORTANT
Connect Ground Bus to Grounding-Electrode System
The grounding-electrode system is at earth-ground potential and is the central
ground for all electrical equipment and ac power within any facility. Use a
grounding-electrode conductor to connect the ground bus to the
grounding-electrode system. Use at minimum 8.3 mm
the grounding-electrode conductor to guard against EMI. The National Electrical
Code specifies safety requirements for the grounding-electrode conductor.
ground
lug
star
washer
bolt
Do not lay one ground lug directly on top of the other; this type
of connection can become loose due to compression
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.
minimum 8.3 mm
minimum 8.3 mm minimum 8.3 mm
SLC 500™ Modular Chassis
ground bus mounting
ground bus
tapped hole
Grounding-electrode conductor
to grounding-electrode system
due to compression of the metal
due to compression due to compression
2 2 2 2
(8 AWG) copper wire for (8 AWG)
(8 AWG) (8 AWG)
Publication 1746-IN016A-MU-P
11