INSTALLATION AND COMMISSIONING
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Manual USZ 08 · EN05 · 2015-06
19
Earthing and screening
Ex d electronics case
Ex e terminal housing
Potential,
measurement
installation
Potential,
measurement
installation
Mains
Data
Equipotential bonding
wire, min. 4 mm
2
P
Use shielded cables from a length of 1 m (this also applies to power cords). Apply the shields to the
cable glands. Use cables which are twisted together in pairs of the type LiYCY 2x2x0.75 mm
²
for
the data line!
The sensors are in metal-to-metal contact with the meter case and need not be separately earthed
when they are replaced. However, a conductive connection has to be established with the piping of
the measurement installation.
In the case of devices without an Ex e terminal housing, the equipotential bonding wire is to be
connected to the earthing screw of the Ex d electronics case.