CompEx Hazardous Areas

Compex 3 day Competence Based Course Electrical and Instrumentation Equipment in Explosive Dust Atmospheres

Duration:  3 days
Per Delegate:  £780.00

Practical Content


Theoretical Content


Delegates must supply evidence of relevant vocational qualifications i.e. Apprenticeship, SVQ3, SJIB. If you cannot supply these please contact our Customer Service Team who will assist you further.

Key Learning Outcomes

  • Identify the correct national regulations, directives and IEC standards which are applicable to hazardous dust locations.
  • Identify the correct criteria and descriptors used to classify a hazardous dust location.
  • Recognise the correct characteristics of common hazardous dust, fibres and flyings – i.e. combustible, conductive and non-conductive.
  • Demonstrate an underpinning knowledge of how Ex electrical equipment is certified, including Ex i ,iD, ‘m’, ‘p’, ‘pD’, ‘t’, ‘tD’, ‘d’, ‘e’, ‘m’, ‘o’, ‘q’, ‘s’, how it maintains its protection concept and how it is to be selected, installed, inspected and maintained.
  • Identify the correct test value readings for IS and non-IS installations and equipment.
  • Use IEC inspection table 1 and inspect pre-installed Ex’d’, ‘e’ and ‘n’, ‘t’, ‘tD’ electrical equipment.
  • Interpret Intrinsically Safe (IS) documentation.
  • Use IEC inspection table 2 and inspect pre-installed certified, non-certified, simple and associated apparatus on a pre-installed intrinsically safe installation.
  • Identify and record faults at the correct grade of inspection.
  • Recommend the correct remedial action and IEC inspection code for each fault identified.
  • Recognise the need to prove an isolation on electrical equipment prior to carrying out a detailed inspection.
  • Use the correct documentation

Course Content

  • Directives and relevant standards for selection, installation and inspection
  • Ignition temperature of combustible dust clouds; & dust layers
  • Combustible dust groups
  • Area classification and recommended representations for combustible dust area classification diagrams
  • Equipment protection types
  • Equipment marking
  • Practices ‘A’ and ‘B’ for the selection of equipment
  • Minimum requirements for ingress protection
  • Consideration of equipment for use in combustible dust
  • Selection and installation of equipment
  • Inspection of equipment


Delegates will undertake a multiple-choice examination paper and practical exercises to demonstrate they have achieved the key learning outcomes detailed above.

PPE Requirements

Safety footwear, coveralls, safety glasses and gloves.

Target Audience
Target Audience

This qualification is suitable for electrotechnical personnel who work on the physical installation and assembly of new ‘Ex’ equipment and perform preventive maintenance and inspections on previously installed equipment in hazardous dust atmospheres.


CompEx National Certificate of Core Competence, valid for 5-years.


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