arpadveress 
Throughout any inspection campaign non-compliant issues are going to be found. Here are some common issues we have found whilst conducting inspections on Increased Safety or Non-Sparking equipment.
• Incorrect Zone (Zone 2 only for Ex n and Zones 1 and 2 for Ex e)
• Incorrect Group for hazardous area classification
• Incorrect Temperature Classification for hazardous area classification
• Incorrect ambient temperature range for environment
• Installed components are not certified for a hazardous area (internals of Ex e and Ex n enclosures are hazardous areas, identical to those they are installed in)
• Installed components are not the same as indicated in the manufacturer’s documentation
• Documentation missing or incorrect
• Certificate of Conformity not read
• Labels missing or not illegible
• Cable damage
• Terminals not torque up correctly
• Cable glands and stopping plugs not appropriate
• Seals damage
• IP washers missing
• Power dissipation calculations not correct/available
• The enclosure or seals are damaged such that a minimum ingress protection (IP) rating of IP 54 cannot be established
• Glands or other accessories have a minimum rating of IP54
• Uncertified or incorrectly certified enclosures/equipment installed in the hazardous area and no Conformity Assessment Document
What others can you think of?
Source: https://www.haspecialists.com.au/blog/typical-problems-encountered-during-ex-e-and-ex-n-inspections/
Few addings:
- Missing Ex personnel competency
- Not trained personnel
- Not proper locknut
- Missing earthing
- No proper documentation of maintenance and repair
Keep up good work!
Arpad
