Apparatus Marking - IEC (Group II)
ATEX Marking (Cable Glands)
Apparatus Marking - IEC (Group II)
ATEX Marking (Enclosures)
- The name and address of the manufacturer.
- Type, serial number and the year in which the equipment was constructed.
- The specific marking of explosion protection
followed by the symbol of the equipment group and the category. - IEC/EN 60079-0, IEC/EN 60079-7, IEC/EN 61241-0 and IEC/EN 61241-1 (Optional)
- ‘ExeII’,
- Temperature Classification,
- IP Rating,
- Certification Name and Number,
- ‘DO NOT OPEN WHEN ENERGIZED’,
- Maximum Dissipated Power (Watts), Volts and Amps. Note: If the temperature range is outside the normal range of -20°C to +40°C, it must be marked on the label.
- For equipment Group II:- The letter ‘G’ where explosive atmospheres caused by gases, vapour or mists are concerned and/or the letter ‘D’ where explosive atmospheres caused by dusts are concerned.
Apparatus Marking - IEC (Group II)
Additional CE Marking
The CE conformity marking must consist of the initials 
and be followed by the identification number of the notified body responsible for production control.
Example: 0600
New Marking – EPL's (Explosion Protection Levels)
The introduction of the EPL's and changes in the EN 60079 and EN 61241 series standards has introduced new marking requirements.
Gas (Surface)
The gas group that was previously (II) for increased safety in surface applications is now IIA, IIB or IIC, depending upon the certification.
Dust
Grouping has also been applied to dusts where the marking is differentiated from gases by the addition of another I i.e. IIIA, IIIB or IIIC.
Explosion Protection Levels
The explosion protection levels are identified by their lettering:-
| Gases | Typical Zone | Dusts | Typical Zone |
|---|---|---|---|
| Ga | 0 | Da | 20 |
| Gb | 1 | Db | 21 |
| Gc | 2 | Dc | 22 |
The protection by enclosure symbol ExtD is now being replaced by Exta, Extb or Extc.
The PL7 Series of boxes are approved to the latest standards and are marked as follows:-
