Automation Mechatronics

Hazardous Area Engineering

Hazardous Area Classification

Hazardous area classification is used to identify places where, because of the potential for an explosive atmosphere, special precautions over sources of ignition are needed to prevent fires and explosions. It is the method of analysing and classifying the plant according to the likelihood of flammable vapour/air or dust/air mixtures occurring. This facilitates the selection of electrical equipment that can be used safely in that environment.

AMI Capabilities

hazardous area engineering

Automation Mechatronics (AMI) have the in-house knowledge to assist with the following key hazardous area requirements: Hazardous Area Classification (HAC) for explosive gas and dust atmospheres which involves the following:

  • Ventilation assessment to determine degree of dilution, the ventilation availability, and the overall effect on zone extents
  • Assessment of material properties of hazardous material
  • Equipment gas group and temperature classification
  • Hazardous area zone extent assessment
  • Recommendations
  • Hazardous area drawings


hazardous area engineering

Auditing of Existing Equipment

Review of all existing electrical equipment against requirements set out in the HAC

Providing Solutions to Non-Compliance:

  • Completion of remedy works as required
  • Identification of non-rated equipment
  • Remedial solutions for the concern i.e. new motor on pump

Design and selection of hazardous area:

  • Calculations as required
  • Equipment specifications against HAC requirements


hazardous area engineering

Development of Verification Dossier:

  • Compiling dossier documentation with all necessary information
  • Assessment of suitability of equipment/ electrical items based on their certificate and requirements from the Hazardous Area Classification Report

Verification Dossier Sign Off:

  • Review of Hazardous Area Classification Report and Verification Dossier including all relevant information such as IECEx certificates by a suitably qualified person
  • Inspection of electrical installation to ensure compliance to HAC report, Verification Dossier and required electrical standards
  • Arranging and managing H-Class Electrical Inspection sign off
  • Supplying Certificate of Electrical Safety
  • Providing final approval to allow start up and use of hazardous equipment