Certification strategy should be chosen early: target markets (EU, UK, North America, global IECEx) determine which conformity modules and NRTL listings you pursue.
This article highlights considerations for NFPA 70 Article 502: Class II Locations Overview under installation practices themes. It is educational and not a substitute for project-specific standards, certificates, or AHJ rulings.
Canadian installations reference similar concepts in the CEC; always confirm edition year and provincial amendments.
Temperature class (T-code) and maximum surface temperature must remain below the ignition temperature of the process gas or dust cloud and layer, including fault conditions where required.
Training competent persons for inspection and maintenance is as important as selecting certified hardware.
Map your equipment EPL and type of protection to the classified area, then verify installation conditions of use, cable entries, grounding, and maintenance intervals. Keep declarations and certificates version-controlled.
If your team needs a second opinion on markings, drawings, or a certification gap analysis, HazloLabs can help scope the next steps.