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Exproof Equipment Maintenance Staff Inspection, Assembly and Maintenance Training


Installation, maintenance, major maintenance, modifications and revisions of Ex equipment are required according to the following standards published on the structure, inspection, repair and maintenance of electrical devices and electrical installations in explosive gas environments:

  • EN 60079 –0 - Electrical equipment - Used in explosive atmospheres- part 0: Equipment - General specifications

  • EN 60079-0/A11 - Explosive atmospheres - Part 0: Equipment - General rules

  • EN 60079 -14: - Electrical equipment - Used in explosive atmospheres - part 14: Design, selection and installation of electrical installations

  • EN 60079-14/AC - Electrical equipment - Used in explosive atmospheres - Part 14: Design, selection and installation of electrical installations

  • EN 60079 -17 -     Explosive atmospheres - Part 17: Inspection and maintenance of electrical installations

  • EN 60079 -19-      Electrical equipment - Used in explosive atmospheres - Part 19: repair, major maintenance and putting into operation

  • EN 60079-19:2011/A1 - Electrical equipment - Used in explosive atmospheres - Part 19: Repair, major maintenance and putting into operation

These standards detail the details and requirements of installation, maintenance, major maintenance, modifications and revisions.

EN 60079-19 Annex B Knowledge, Experience and Competencies of “Responsible Persons” and “Operators”

In EN 60079-19 standard B.1. This annex specifies the knowledge, experience and competencies of the persons specified in this standard. In B.2, "Knowledge and experience" and in B.2.1 "Responsible persons" are explained:

The “responsible persons” responsible for the major maintenance, repair and operation of special types of explosion-proof devices must have at least the following:

  • Have a relevant understanding of electrical and mechanical engineering at a craftsman level or higher,

  • To be knowledgeable about the application of explosion protection principles and techniques,

  • To be knowledgeable and skilled in the interpretation and evaluation of engineering-related projects,

  • Familiarity with measurement procedures, including applied measurement science competencies to measure known quantities.

  • To have the understanding and working knowledge of the relevant standards in the field of explosion protection,

  • Basic knowledge of quality assurance, including calibration instrumentation and traceability principles in measurement


Such persons should limit their participation in major maintenance, repair and return operations in their assigned competency area and should not engage in self-regulation of explosion-proof equipment without expert advice.

In B.2.2, a regulation regarding maintenance personnel has been introduced. Maintenance staff should have the following as necessary to perform their duties:

  • To have knowledge about the general principles of protection types and marking,

  • To have knowledge about the issues related to device design affecting protection,

  • To have knowledge about inspection and testing in relation to the relevant sections in this standard,

  • Ability to introduce replacement parts and components approved by the manufacturer,

  • To be familiar with the special techniques to be used in the repair operations specified in this standard.


  • What is ATEX, Explosive Atmosphere?

  • Regulation on the Protection of Employees from the Hazards of Explosive Environments (99/92/EC),

  • Regulation on Equipment and Protective Systems Used in Potentially Explosive Environment (2014/34/EU)

  • According to the 2014/34/EU directive, how should the declaration and certification of mechanical equipment be? Evaluation of the status of certificates of existing ex-proof equipment,

  • What is IECEx Schema, ExACB (ACB= Accepted Certification Body), ExTAG (Testing and Assessment Group)?

  • Criteria to be followed in the selection of equipment and protective systems,

  • How to choose the Ex Label of the Electrical/Electronic/Programmable system in the ZONE?

  • What are the Electrical/Electronic/Programmable system Certification and Declaration processes within the ZONE?

  • How to choose Ex Label of mechanical equipment?

  • What are the Certification and Declaration processes of mechanical equipment?

  • What is MEIRA (Mechanical Ignition Risk Assesment) analysis for all equipment in the ZONE? How should it be done?

  • How does MEIRA (Mechanical Ignition Risk Assesment) analysis affect maintenance and assembly processes?

  • In Mechanical and Electrical/Electronic/Programmable system applications; Definition of 'Intrinsic Safety' and Usage of Zone

  • In mechanical applications; Differences Between 'Explosion Proof' and 'Explosion Protected'

  • In mechanical applications; Comparison of NEC 500 (National electrical code) Division and Zone,

  • What is Conduit? Installation, assembly and maintenance rules of Conduit systems,

  • How maintenance and installation errors affect ZONEs in the Calculation of Explosive Atmospheres (in accordance with EN 60079-10-1:2015 and CEI 31-35 Italian Standard)

  • Selection of Mechanical Equipment by Zone (EN 80079-36, EN 80079-37) and Maintenance, Assembly, Installation and OHS Precautions

  • Definition of Heat and Gas Groups, Application and Combination of Protection Types, Application of 'Intrinsically Safe' Protection Type,

  • Intrinsically Safe Apparatus cabling and Zener barrier selection and calculation,

  • EN 60079-0 Assembly Rules

    • General assembly rules according to EN 60079-0

    • Material selection rules

    • Group I or Group II electrical equipment selection and installation

    • “X” type and “U” type equipment and assembly rules

    • Cable, gland and sealing elements selection and installation rules,

    • Armored cables and glands etc. equipment installation,

    • Conduit systems and installation rules

  • EN 60079-14 Electrical Installation Rules

    • Network Structure According to IEC 60079-14

    • Wiring rules according to IEC 60079-14

    • Grounding, Surfaces and Corrosion According to IEC 60079-14

    • Grounding rules in Ex environment

    • Lightning protection rules in ex environment

    • Inspection according to EN 62446:2009

  • EN 60079-16 Equipment Inspection Rules

    • Visual inspection rules according to EN 60079-16

    • Close inspection rules according to EN 60079-16

    • Detailed inspection rules according to EN 60079-16

  • EN 60079-19 Maintenance Rules

    • What is Repair, Maintenance, Major Maintenance and Overhaul?

    • Identifying the Repaired Device by Marking,

    • Certification status after Repair, Maintenance, Major Overhaul and Overhaul

    • When is Third Party approval required?

    • Information and Documents Required After Repair / Major Maintenance

    • Repair Service Records,

    • Application for Used, Repaired or Replaced Exproof Equipment and Spare Parts,

    • Paint thickness, dust thickness, optical beam protection, etc. in ex-proof equipment.

  • EN 80079-36, EN 80079-37 and Maintenance, Assembly, Installation

  • Conduit systems and application errors

  • 'Explosion Protected' application errors with 'Explosion Proof'

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