Electrical Connection; External Earth Connection; Cable Entries (Kle); Blanking Plugs - Eaton CROUSE-HINDS Série Mode D'emploi

6.4

Electrical connection

The electrical connection of the equipment must be performed
by qualified electricians (IEC/EN 60079-14).
The insulation of the connection conductors shall reach up to the
terminal. The conductor itself must not be damaged.
The current load table found in the cover of the terminal box and
in the operating instructions shall be observed.
The respective regulations shall be taken into account when connecting
the correctly stripped connection conductors of the cables.
The minimum and maximum conductor cross sections shall be taken in
account (see technical data).
All screws and/or nuts of the connection terminals, including those not in
use, shall be tightened securely.
To maintain the explosion protection, the connection of conductors
shall be carried out with special care.
The connection terminals are designed for the connection of copper
conductors.
When using fine or multi-wire connection cables, the conductor ends shall
be treated in accordance with the valid national and international regula-
tions (e.g. use of ferrules).
In the case of mixed terminal arrangements with Ex-e/Ex-i terminals, the
minimum clearances shall be observed (see, for example,
IEC/EN 60079-11).
Fig. 8
Fig. 9
16
Explosion protected terminal boxes
6.4.1
Fig. 8
Caused of electrolysis.
The wire ends of the connecting cables with a copper conductor
must be provided with a ring terminals.
The external earth connection of the enclosure is made via the external
earth lugs - marked with (
The screws tighten, depending on the thread diameter (test torque refer
to Technical Data).
6.4.2
Fig. 9
Caused of electrolysis.
The wire ends of the connecting cables with a copper conductor
must be provided with a ring-, fork terminals or ferrules.
The internal earth connection of the enclosure is made via the internal
earth lugs - marked with (
The screws tighten, depending on the thread diameter (test torque refer
to Technical Data).
6.5
Generally, only certified cable entries and blanking plugs may be
used.
Flexible cables are to be used with trumpet- shaped cable glands
or other suitable entries with additional pull-relief.
The mounting directives applicable to the cable entries used shall
be observed.
Intrinsically safe circuits (Ex i) are to be introduced on the color
(light blue) marked cable entries.
When using cable entries with a lower IP protection than that
which applies to the device (see technical data), the IP protection of
the whole device will be reduced.
Use cable glands with sealing only between glands and
enclosure.
If, when connecting equipment or cable entries into the equipment,
connection elements with a separate test certificate are used, if
applicable, the respective requirements of the connection element shall
be taken into account.
In order to establish the minimum protection category, unused holes
have to be closed with a certified blanking plug.
Care has to be taken that when fitting the cable entries, sealing inserts
appropriate to the cable diameter are used.
In case of sealing inserts that are cut out, it will have to be ensured that
the insert is properly adapted to the cable diameter.
All vacant metric CEAG / CCH cable entries are to be closed with the
certified blanking plug for metric cable entries.
In order to ensure the required minimum protection category, the cable
glands shall be tightened down (test torque see chapter 11 and 12) .
Overtightening might impair the protection category.
When tightening the cap nut of the type ADE 1F metal cable
entry, the screwing is to be protected against twisting by means of a
suitable tool.
GHG 71

External earth connection

).
Internal earth connection
).

Cable entries (KLE); blanking plugs

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