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Personnel Competency for Explosive Atmospheres

Certification of competency for employees working in hazardous locations.

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It’s critical for your employees working in areas involving explosive atmospheres (Ex) to have the knowledge and competency necessary to properly and safely perform activities – such as classification, design, installation, maintenance, inspection and repair – in accordance with the applicable International Electrotechnical Commission Explosive (IECEx) standards. The IECEx Scheme for Certification of Personnel Competence (CoPC) for Explosive Atmospheres provides global industries with a single system for the assessment and qualification of persons to efficiently and safely carry out activities in hazardous areas or areas associated with them.

The IECEx 05 Scheme addresses the certification of employee competence involved in activities through 11 Units of Competence, as follows:

  • Basic knowledge and awareness to enter a site that includes a classified hazardous area (Unit Ex 000)
  • Applying the basic principles of protection in explosive atmospheres (Unit Ex 001)
  • Performing classification of hazardous areas (Unit Ex 002)
  • Installing explosion-protected equipment and wiring systems (Unit Ex 003)
  • Maintaining equipment in explosive atmospheres (Unit Ex 004)
  • Overhauling and repairing explosion-protected equipment (Unit Ex 005)
  • Testing electrical installations in or associated with explosive atmospheres (Unit Ex 006)
  • Performing visual and close inspection of electrical installations in or associated with explosive atmospheres (Unit Ex 007)
  • Performing detailed inspection of electrical installations in or associated with explosive atmospheres (Unit Ex 008)
  • Designing electrical installations in or associated with explosive atmospheres (Unit Ex 009)
  • Performing audit inspection of electrical installations in or associated with explosive atmospheres (Unit Ex 010)

Please note, the IECEx CoPC Scheme is not intended for employees involved with:

  • Design or manufacturing of products where the output of their work is verified through testing, assessment or equipment certification
  • Testing and certification bodies, where their competence is verified through the accreditation of a test laboratory or a certifying body
Impartiality statement

We place the utmost importance on the integrity and impartiality of our certification activities, managing conflict of interest, and ensuring objectivity of our certification activities, and the trust it conveys to you and the public at large. The principles inspiring this confidence include impartiality, competence, responsibility, openness, confidentiality and responsiveness to complaints. These principles are identifiable in our Mission Statement.


We’re an approved IECEx Certification Body (ExCB) for the IECEx 05 Scheme for Units Ex 000, Ex 001, Ex 003, Ex 004, Ex 006, Ex 007, and Ex 008 and can issue both Ex Facility Orientation Certificates (EFOC) and CoPC.

Why UL

We drive global research and standards to continually advance and meet ever-evolving product safety, performance and interoperability needs. Our global network of technical experts and state-of-the-art facilities, along with our long-standing
relationships with regulatory authorities, partner laboratories and industry technical leaders, helps you gain the compliance credentials you need to compete in a more complex global supply chain. Leverage our global brand acceptance and trust to add value to your innovations.

Single-source provider

UL’s global family of certification staff can help save you time and money with a single, local point of contact for your certification needs.

Knowledge and speed

We have technical expertise versed in all protection methods with comprehensive industry knowledge that translates into actionable business efficiencies for our customers to speed time to market. Engineers perform Quality Audits bringing a higher level of technical competency to the audits. With a U.S. based certification officer (CO) on staff, certification time is reduced.

Global market access

Leverage our active participation and leadership in the global standards writing process. You can benefit with faster time to a global marketplace with the UL certification process, not only do we understand the requirements, we helped develop them. In fact, we participate in more than 50 Standards writing committees, such as: TC31 (IECEx), Standards Technical Panels (STPs) (North America), National Fire Protection Association (NFPA), American Petroleum Institute (API), and Bureau of Safety and Environmental Enforcement (BSEE) and Code of Federal Regulations (CFR) committees. We can also help streamline the certification of custom-built hazardous location (HazLoc) equipment, including control panels, for global market access by including UL, C-UL, ATEX and IECEx certifications.

Download additional information on the IECEx 05 Scheme

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