Mounting and Installation
20
303049 / 825060300230
2022-05-30·BA00·III·en·00
DE
EN
FR
IT
ES
RU
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Ex d enclosure made of aluminium/flameproof enclosure
8250/0 series empty enclosure,
8250/1 series terminal box,
8250/5 series control panel/control station
6.2.2 Protective Conductor Connection
Always note the following points when connecting a protective conductor:
▶
Always connect a protective conductor.
▶
Use cable lugs for an external protective conductor connection.
▶
Permanently install the protective conductor close to the enclosure
(for the tightening torque, see the "Technical data" chapter).
▶
Connect all uncoated, non-live metal parts to the protective conductor system.
Outer protective conductor connection
16137E00
▶
Connect the protective conductor to the outside of the enclosure on either enclosure
side A or D (see figure).
▶
Connect the protective conductor to the enclosure (1) using a cable lug (3).
▶
Place the washer (2) provided on top of the cable lug and secure the screw (5) using a
screw locking device (4).
Inner protective conductor connection
▶
Lay the protective conductor permanently on the inside (see figures) using a cable lug,
such that it mirrors the contour of the enclosure.
▶
For electrical components in the cover: Make the PE connection (PE conductor
cross-section depending on installed line conductor) from the cover to the enclosure.
16148E00
19166E00
2
3
5
1
4
C
B
D
A
B
C
D
A