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2.24
Junction boxes designed for an ambient temperature up to and including +40°C are marked
with a temperature class of T6 for Gas and T85°C for Dust.
Junction boxes designed for an ambient temperature of +41°C up to +55°C are marked with a
temperature class of T5 for Gas and T110°C for Dust.
Junction boxes designed for an ambient temperature of +56°C and higher are marked with a
temperature class of T4 for Gas and T135°C for Dust.
2.25
It is strictly prohibited to pierce or drill (with or without a screw thread) the housing.
2.26
The user must ensure compliance with the national installation specifications for electrical
installations in environments in which a gas or dust explosion hazard is present (in Belgium it
is the AREI).
2.27
The inside of the equipment must always be kept clean and dry.
2.28
Repairs must only be performed with the use of original components.
2.29
For more detailed information about the equipment, please refer to the latest version of the
documentation or contact YSEBAERT for advice.
2.30
Before commissioning the equipment, one must ensure that there is no foreign matter
present in the equipment (e.g. instruction notices, etc.).
2.31
These instructions must be stored in a safe place for later reference.
3.
Specific instructions per protection method for devices designed for environments in which
a gas explosion hazard is present:
3.1
Increased "e" Safety EN 60079-7
3.1.1
Seals and gaskets should be undamaged.
3.1.2
Unused threaded holes and/or cable glands should be plugged using Exe plugs with ATEX
certificate (according to the last edition of the standards) and in compliance with the
apparatus category, gas group and temperature class.
3.1.3
If fitted cable glands need to be replaced, make sure that new Exe certified glands are used
with ATEX certificate (according to the last edition of the standards) and in compliance with
the apparatus category, gas group and temperature class.
3.1.4
Sections of conductors and terminals should match.
3.1.5
In junction boxes most of the heat is not generated by the terminals themselves but by the
current passing through the conductors. If the user connects a smaller section than that of
the terminal, the installer must consequently take into account and mark up a lower current
value. This will require prior checking by YSEBAERT.
One can make a distinction here between 2 types of junction boxes depending on the
application: on the one hand, instrumentation (4-20mA, analogue signals, IS, etc.), and on
the other hand, power. In the first case, connecting a smaller wire/cable section will not have
any detrimental effect in terms of heat generation. The above-mentioned restriction
therefore only applies to power junction boxes.
3.1.6
Unless stated otherwise, only one conductor per terminal is allowed.
3.1.7
The clearances and creepage distances indicated by the manufacturer should be respected.
3.1.8
The values of tension and power shall not exceed those indicated on the tag plate.
3.1.9
Conductors that are not in use shall be connected to an extra terminal or to the earth.
3.1.10 The whole appliance should be correctly earthed.
3.1.11 Conductors should be connected with greatest care. The insulating sheath should extend
right up to the terminal. The wire itself should not be damaged or notched.
3.1.12 All screws and nuts of terminals and earth-connections should be firmly tightened, even
when they are not in use.
3.1.13 A closed box must guarantee at least IP66.
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