ATEX & IECEx Marking

ATEX and IECEx Certification

Marking of Ex equipment is a requirement. It is essential for allowing a user to consider an appropriate piece of equipment for a specific hazardous atmosphere. For instance, it may warn of special conditions for safe use, special parameters, hazards that may occur etc. Marking also provides traceability and references the certification and certifying body. To achieve certification, a manufacturer must at the very least provide a drawing illustrating the nameplate(s) that details the relevant marking.

Nemko’s Interactive Ex Marking generator allows users to create their own Ex marking. You can access it by clicking the image below.

Marking
Marking of electrical equipment must include; manufacturer's name, model number, serial number, ratings and the following Ex-marking at a minimum*:

Type of protection ( d, ia, e, p, nA etc.)
Group for which equipment is approved. ( IIA, IIB, IIIA..)
Temperature code or maximum surface temperature (T1,T2,..T6)
Equipment Protection Levels. (Ga,Gb or Gc)

*Note: Some protection types may require additional marking. Pressurisation for example would require additional information such as purge time and flow rate etc.
In Europe (ATEX) the marking may also include the European Community symbol for explosion-protected equipment fully complying with a Directive 94/9/EC, a script Ex in a hexagon as shown below.

Example of typical product marking for electrical equipment .