Ex operatives / technicians are linked directly to Ex designer and vice verse – what is IEC 60079-14 4.2 about?

See what IEC 60079-14 – Annex A (normative): Knowledge, skills and competencies of responsible persons, operatives/technicians and designers says as per follows:
A.3.3 Operatives/technicians
Operatives/technicians shall be able to demonstrate their competency and provide evidence of attaining the knowledge and skill requirements specified in A.2.2 relevant to the types of protection and/or types of equipment involved.
They shall also be able to demonstrate their competency with documentary evidence in the:
a) use of documentation in 4.2;
b) production of reports, e.g. inspection reports, to the user as identified in 4.2;
c) practical skills necessary for the preparation and installation of relevant concepts of protection;
d) use and production of installation records as identified in 4.2.
A.3.4 Designers
Designers shall be able to demonstrate their competency and provide evidence of attaining the knowledge and skill requirements specified in A.2.3 relevant to the types of protection and/or types of equipment involved.
They shall also be able to demonstrate their competency with documentary evidence in the:
a) production of documentation specified in 4.2;
b) production of designers certificates to the user as identified in 4.2;
c) practical skills necessary for the preparation and compilation of relevant design details for the concepts of protection and systems involved;
d) updated and production of installation records as identified in 4.2.

WHAT IS THAT 4.2 about?
4.2 Documentation
It is necessary to ensure that any installation complies with the relevant equipment certificate (see also Clause 5) as well as with this standard and any other requirements specific to the plant on which the installation takes place. To achieve this result, a verification dossier shall be prepared for every installation and shall be either kept on the premises or stored in another location. In the latter case, a document shall be left on the premises indicating who the owner or owners are and where that information is kept, so that when required, copies may be obtained.
NOTE The verification dossier can be kept as hard copy or in electronic form. Methods accepted by legislation in each country can have an impact on the form in which the documentation will be legally accepted.
In order to correctly install or extend an existing installation, the following information, additional to that required for non-hazardous areas, is required as part of the verification dossier, where applicable:

SITE
– area classification documents (see IEC 60079-10-1 and IEC 60079-10-2) with plans showing the classification and extent of the hazardous areas including the zoning (and maximum permissible dust layer thickness if the hazard is due to dust);
– optional assessment of consequences of ignition (see 5.3);
– where applicable, gas, vapour or dust classification in relation to the group or subgroup of the electrical equipment;
– temperature class or ignition temperature of the gas or vapour involved;
– where applicable, the material characteristics including electrical resistivity, the minimum ignition temperature of the dust cloud, minimum ignition temperature of the dust layer and minimum ignition energy of the dust cloud;
– external influences and ambient temperature (see 5.9).

EQUIPMENT
– manufacturer’s instructions for selection, installation and initial inspection;
– documents for electrical equipment with conditions of use, e.g. for equipment with certificate numbers which have the suffix “X”;
– descriptive system document for the intrinsically safe system (see 16.2.4.2);
– details of any relevant calculation, e.g. for purging rates for instruments or analyser houses;
– manufacturer’s/qualified person’s declaration (see 4.4.2).
Consideration should be given to obtaining information for maintenance and repair to meet the requirements of IEC 60079-17 and IEC 60079-19 respectively.

INSTALLATION
– necessary information to ensure correct installation of the equipment provided in a form which is suitable to the personnel responsible for this activity (see IEC 60079-0, Instructions);
– documentation relating to the suitability of the equipment for the area and environment to which it will be exposed, e.g. temperature ratings, type of protection, IP rating, corrosion resistance;
– the plans showing types and details of wiring systems;
– records of selection criteria for cable entry systems for compliance with the requirements for the particular type of protection;
– drawings and schedules relating to circuit identification;
– records of the initial inspection (Annex C).
– installer’s/qualified person’s declaration (see 4.5)
NOTE Records of inspection for assemblies or pre-installed items can be accepted as part of initial inspection records.
WHAT DOES IT MEAN EXACTLY?

Operator communicates with designer, and vice verse. They almost have to have the same Ex competency and understanding based on their basic skills. Please classify the required Ex competency on site again. Ex Competency is not only about papers, fancy certificates, it is about pure theoretical and practical knowledge and understanding about the how to…
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