EMG ELDRO EdEx Series Assembly Manual page 48

6 Assembly and installation
6.2 Electrical connection
48 / 75

The cable gland and the screws of the housing cover must be
firmly tightened to ensure that the IP protection class is
maintained. Excessive tightening damages the seal and affects
the IP protection class.

If a pressure-proof cable entry with sealing ring is used, the
minimum length of the connection cable must not be less than 3
m.

The cables to be connected must be de-energised. Otherwise
there is a risk of damage to the EdEx thruster and ignition of an
explosive atmosphere.

All metallic housing parts of electrical equipment and other
conductive parts must be connected to the equipotential bonding
system.

The discharge from the housing of the EdEx thruster can be
designed as follows:
– external earth terminal (cross section: greater than 4 mm
– secured, metallic contact with construction points which are
connected to the equipotential bonding

The external ground terminal on the housing must be connected
with low resistance to the equipotential bonding of the potentially
explosive area.

No potential equalisation currents may flow between potentially
explosive areas and areas that are not potentially explosive.

The minimum cross section: 2 x 1.5 mm

Discharging an electrostatic charge with a resistance between
0.2-1 mΩ is not considered grounding.

Any additional sensors that may be required must be suitable
and selected for the ambient conditions including the
corresponding zone, and installed according to the
manufacturer's specifications.
Further information is provided in the description of the power supply
connection (⇒ Power supply connection section).
ELDRO-EdEx-Montageanleitung-607338-EN.docx
2
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2 2
or 1 x 4 mm