CARLO GAVAZZI LDD1 Manual De Instrucciones página 21

7.4. Feeder cable
It is important to pay attention to the installation of the feeder cable between the Loop Detector and
the loop. The groove between the corner of the loop, to the edge of the road, should follow same
recommendations as for loop installation.
Note: The feeder cable must be twisted at least 20 turns per meter all the way from the corner of
the loop, to the Loop Detector and be fixated right up to the Loop Detector terminals.
The maximum recommended length of the feeder cable is dependent on the wire gauge. For long wire
lengths, the cross section of the cable should be bigger.
Cable gauge [mm
0.75 mm²
1.50 mm
2
2.50 mm
2
The following rules must be followed to ensure reliable detection:
• The feeder cable should not run in parallel with other electrical wires. A minimum distance of 10 cm
between feeder wire and other cables is required.
• Excess feeder wire should be cut off to suitable length. It must never be coiled up or stuffed inside the
control cabinet.
• The feeder cable must be fixated all the way from the corner of the loop to the Loop Detector.
Movement of the feeder cable during operation can lead to false detections.
• Feeder wires from adjacent Loop Detectors, should not be placed in close proximity of each other.
] Cable gauge [AWG]
2
Maximum recommended length
18 AWG
15 AWG
13 AWG
Rev.00 - 03.2019 | LDD1/LDD2 Single and Dual Loop Detector | © 2019 | CARLO GAVAZZI Industri
20 meter (66 feet)
40 meter (131 feet)
50 meter (164 feet)
21