Exit Loops
Loop wires are installed 1.5" underground by cutting the concrete with a circular saw.
The typical size loop is 8x4'. Common loop wires are size 16 or 18 AWG stranded copper
XLPE (cross-linked polyethylene) electrical wire. 3 layers of turns are required for a typical
4x8' loop. For different size loops, use 4 turns for 10-20ft in perimeter, 3 turns for 20-32ft in
perimeter, and 2 turns for 32-98ft in perimeter. Place a plastic foam or backer rods above
the loop wire turns to hold it in place. Backer rods ensure that the wires are in place
and do not vibrate. Any vibration of wire movement will cause a false detection. The wire
ends must be twisted back into the gate operator with a minimum of 6 twists
per foot. The twisted ends must be placed inside a PVC conduit. Use sealant to
close the ground once finished.
27
Use a circular saw to create a saw cut on the ground.
Depth: 1.5"
Width: 0.2 - 0.3"
Make sure the edges are at a 45° angle.
45°
Foam Backer Rods 1" spaced 1 feet apart on the top layer
Continuous (no splices) loop wire
with 3 turns placed directly on top
of each other
PVC Conduit
Twisted Lead-
in Wires
leading into
gate operator
loop detector
4"
8"
Summary of Contents for CM3
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