Rice Lake Legend 480-2A, Technical Manual

Page: 18 / 85

Cable Connections 11
2.3.1 Cable Grounding
Except for the power cord, all cables routed through the cord grips should be grounded against the indicator
enclosure. Do the following to ground shielded cables:
• Use the ground clamp screws to install grounding clamps on the grounding bar. Do not tighten screws yet.
There is a larger clamp available in the parts kit; the larger clamp is for a cable diameter of 0.25 inch, the
smaller clamp is for a cable diameter of 0.18 inch
• Route cables through cord grips and grounding clamps to determine cable lengths required to reach cable
connectors. Mark cables to remove insulation and shield as described below:
• For cables with foil shielding, strip insulation and foil from the cable 1/2

inch (15 mm) past the
grounding clamp (see Figure 2-2). Fold the foil shield back on the cable where the cable passes through
the clamp. Ensure silver (conductive) side of foil is turned outward for contact with the grounding clamp.
• For cables with braided shielding, strip cable insulation and braided shield from a point just past the
grounding clamp. Strip another 1/2 inch (15 mm) of insulation to only expose the braid where the cable
passes through the clamp (see Figure 2-2).
• For load cell cables, cut the shield wire just past the grounding clamp. Shield wire function is provided
by contact between the cable shield and the grounding clamp.
• Route stripped cables through cord grips and grounding clamps. Ensure shields contact grounding
clamps as shown in Figure 2-2. Tighten ground clamp screws.
Figure 2-2. Grounding Clamp Attachment for Foil-Shielded and Braided Cabling
Grounding
clamp
Braid
Braided Cable
Cut insulation here
Foil Insulated Wire
Silver
side out Shield wire (cut)
Cut insulation here
for foil sheilded cables
Length of foil before
folding back on
cable insulation
Grounding
bracket
Grounding
clamp
480 Indicator
back panel
Ground
clamp screw
Ground
clamp screw