Wallace Perimeter Security SPEEDGATE - Page 81

SPEEDGATE Installation and Maintenance Manual Revision 1 - MAY 2023
81
INSTALLATION INSTRUCTIONS FOR OPTIONAL VEHICLE DETECTORS
Installaon of Vehicle Detecon Ground-Loop Systems
Inducon loop lines must be routed separately from all other connecng lines and with the
greatest possible distance away from the motor wiring and live lines in order to minimize
potenal interference. The loop lines must be twisted in pairs up to the internal terminals of
the control system.
1. Install ground loops, inside (“secure” side) and outside (“public” side), as indicated on ground
loop installaon instrucons provided by the manufacturer. Conguraons dier depending
on the applicaon. The ground loop(s) size and dimension are to be determined by the types
of vehicles using the gate.
2. Ground loops shall be at least 3  (91cm) from the face of the gate on the public side; at least 3
 (91cm) away from the panels in the open posion on the private side of the gate.
3. If the ground loops are placed too close to the gate, the gate panels may acvate the loop when
they are opening. Ground loop “home run” leads should be saw-cut/trenched to operator
cabinet. Ensure that the ground loop leads are twisted as per the manufacturer’s specicaons.
3.1 Saw Cut Loop Installaon:
3.1.1 Mark the loop layout on the pavement. Be aware that sharp inside corners can damage the
loop wire insulaon.
3.1.2 Set the saw to cut to a depth (typically 1.25” to 1.5”; 31.75mm to 38.1mm) that ensures a
minimum of 1” (25.4mm) from the top of the wire to pavement surface.
The saw cut width should be larger than the wire diameter to avoid damage to the wire
insulaon when placed in the saw slot.
• Cut the loop and feeder slots.
• Remove sharp inside corners. The corners of the cut must be at an angle or core drilled to
relieve stress on the wires.
• Remove all debris from the saw slot with compressed air.
• Check that the boom of the slot is smooth.
A greater depth should be used in soer pavement materials to beer protect the loop wire
insulaon for a longer period of me against damage from surface erosion and wear.
Care should be taken to avoid cung all the way through the pavement material. If possible,
the saw cut depth should not exceed one half the thickness of the pavement material.