Feig Electronic VEK M1H Bedienungsanleitung Seite 6

27.06.2017
7 Instructions for the installation of induction loops

The induction loops must be installed at least 15 cm from fixed
metal objects and at least 1 m from moving metal objects. The
maximum distance to the road surface should be 5 cm.

Keep loop cables away from mains power cables.

Use a normal single-pole 1.5 mm² diameter cable. If the cable is
buried directly, it must have a suitable insulation. If hot casting
compound is used ensure for temperature resistance of the cable.

Preferably, induction loops are made square or rectangular. If it is
not possible to use pre-fabricated loops, the installation is per-
formed as shown in the figure below, in a groove cut into the road
surface. In this case, the loop cable must be firmly fixed in the
groove and then the groove must be filled with the potting com-
pound. The corners should be at an angle of 45° to avoid damage
to the insulation of the cable.
8 mm

For installation of the loop cable use the number of turns indicated
in the table.
Induction loop perimeter
less than 3 m
from 3 to 4 m
from 4 to 6 m
from 6 to 12 m
over 12 m

The two cable ends from the loop to the detector must be twisted at
least 20 times per meter.

Do not make any joints on the cable. If this is still necessary, the
contact points must be protected against the ingress of moisture by
means of cast resin.
VEK M1H_DE_GB_FR_NL_IT_ES_CE_FAAC_1.docx
30-50 mm
Number of turns
6
5
4
3
2
6 | 19
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