After 5 years of working as EEHA (Electrical equipment in hazardous areas) inspector, I can definitely say the Ex knowledge not only mandatory as a type of quality assurance, it is also vital for preventing future breakdowns and catastrophic failures
I've been working in Ex workshop since 1996. I started with keeping records of technical documentation. Today I am a specialist for Ex protection. I am responsible person for inspection, overhaul, repair and maintenance explosion-proof electrical equipment. My specialty is Exd electric motors.
United Arab Emirates
FFPA audits gives excellent chance for remedial work on existing plants - so we made it in various sites!