Marking
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Contents of the marking
The rules for the marking of systems, devices and components are uniformly defined in the standards relating to the general technical requirements.
Because the European Community has agreed in the future to also formulate uniform requirements and to introduce a uniform classification for devices, systems and component, other than electrical equipment, the marking has also been unified. Additional symbols have been introduced.
This has been defined in the directive 94/9/EC on "Devices and protective systems for use in hazardous areas“.
This directive includes electrical equipment, and for this reason the markings are prefixed by additional symbols.
The marking on all devices and protective systems for hazardous areas must indicate the area of their designated use.
Principle
The marking must indicate the following
- The manufacturer who has put the item of equipment on the market
- A designation which allows it to be identified
- The application zone
- underground I,
- other areas II,
- gases and vapours - G -, dust - D - or mines - M -
- The categories which indicate whether the device is only suitable for specific zones.
- The type(s) of ignition protection the equipment fulfils
- The explosion group, and if required, the explosion hazard subgroup for which it is suitable and
- The temperature class for which the piece of equipment is suitable
- The test centre where the test certificate was issued, the standard or revision of a standard applicable to the piece of equipment including the registration number of the certificate at the test centre, and, if necessary, which special conditions must be observed.
In addition, the information which is required for a similar device of industrial construction must be available.
In accordance with EC directive 94/9/EC the future marking for all equipment will be as follows:
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0158 II 2 G
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| in accordance with EC directive 94/9/EC |
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Conformity mark |
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| 0158 |
notified body who certified the QA system in accordance with 94/9/EC |
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The following device groups are distinguished |
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Device group II
Category/protection level 2
Gases, vapours or mists |
other areas
suitable for zone 1
marking with prefix G |
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| Area |
Classification of the explosion hazard |
erequired marking
of the used equipment |
| Device group |
Category |
Underground
Underground
other
other
other
other
other
other
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Operation with explosion hazard
Shut down with explosion hazard
Zone 0
Zone 1
Zone 2
Zone 20
Zone 21/Zone 22 for conductive dust
Zone 22 for non-conductive dust
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I
I
II
II
II
II
II
II
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M 1
M 2 und M 1
1 G
2 G + 1 G
3 G + 2 G + 1 G
1 D
2 D + 1 D
3 D + 2 D + 1 D
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Type of ignition protection, explosion group/subgroup and temperature class, conforming to which the piece of equipment has been produced and is suitable for, will continue to be found using the marking customary for electrical equipment.
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| Manufacturer and designation type |
| manufactured in accordance with EN 50014 ff |
| intrinsically safe |
| over ground |
| subgroup "C" |
| temperature class T6 |
| symbol of the notified body |
| certified 2003 |
| ATEX generation |
| lserial number of notified body |
| If available - observe special conditions |
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| Certificate of conformity: |
DMT 03 ATEX E029 X
X = special conditions
DMT 03 ATEX E029 U
U = component certificate - no temperature class |
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| -Conformity |
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| The following route to CE conformity for electrical apparatus is prescribed according to EC directive 94/9/EC.
Depending on the conformity category, it defines which path the manufacturer has to follow towards making the CE conformity declaration. The overview below shows these paths for the different electrical equipment conformity categories.
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Intended use
of the equipment: |
Conformity category
to be satisfied: |
Requirements for the conformity declaration |
1. - on manufacturer’s
premises |
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2. - at the notified
testing body |
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3. - on manufacturer’s
premises |
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| Declaration of conformity issued by |
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CE mark
issued by
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| Zone 0 |
| 1 |
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Fulfilment of the requirements of the directive 94/9/EC
EN 50284 el. BM II 1 G |
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EC prototype testing by a notified body e.g. IBExU, BVS orBASEEFA
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QA production EN 29002 |
Product testing in production |
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Manufacturer
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Manufacturer
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| Zone 1 |
| 2 |
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Fulfilment of the requirements of directive 94/9/EC, e.g. by conformity to EN 50014 ff „ conventional types of protection“
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Prototype testing by a notified body e.g. PTB, TÜV-A or KEMA |
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Conformity with design |
QA products EN 29003 |
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Manufacturer
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Manufacturer
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| Zone 2 |
| 3 |
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Fulfilment of the requirements of directive 94/9/EC type of ignition protection EEx n IEC 60079-15 and EN 50021
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Not required |
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Assessment |
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Manufacturer
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Manufacturer
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During the transitional period, equipment will be distributed which corresponds to the EC directives, which by then will have become valid, such as the EMC directive, the machinary directive and the low voltage directive. Stepwise, the Ex directive 94/9/EC will also have to be complied wiht and EC prototype certificates will be issued which will be marked „ATEX“. Until this happens the EC directives which are being fulfilled will be listed in the Declaration of CE conformity. With the EC prototype certificate according to the ATEX generation, the CE mark will be shown and the EC registration number issued in Brussels, at the notified body, where the quality assurance system according to directive 94/9/EC has been certified. For Leuze electronic this is e. g. DMT with the number 0158.
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