Typical Problems Encounted During Ex e and Ex n Inspection

Published 7 May '19
Read Time: 5 mins

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?

This material is produced by HAZ. The information is of a general nature only and should not be relied upon.  Each set of circumstances associated with compliance of hazardous areas and Type B compliance is unique and expert advice on your particular circumstances should be sought.  HAZ accepts no liability for any reliance on the information published on this website.