SVP Industrial Electrician Practice Questions - Saudi Skill Verification Program - Industrial Electrician (Saudi Arabia) Exam

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What class of arc-rated personal protective equipment (PPE) is required for tasks where the estimated incident energy exposure exceeds 40 cal/cm²?

Work must not be performed live; de-energization is mandatory because the NFPA 70E PPE-category method stops at 40 cal/cm² and the blast/pressure hazard above it makes energized work unjustifiable. PPE Category 4 (minimum arc rating of 40 cal/cm²). PPE Category 5 (minimum arc rating of 50 cal/cm²). Heavy-duty double-layered leather welding jackets and carbon-fiber face shields.

Correct Answer:

Work must not be performed live; de-energization is mandatory because the NFPA 70E PPE-category method stops at 40 cal/cm² and the blast/pressure hazard above it makes energized work unjustifiable.

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