Electrician Red Seal · Question
A 'Category 1' electrical shock hazard is defined in the CSA Z462 standard as:
CSA Z462, Workplace electrical safety, previously used Hazard/Risk Categories (HRC). The updated standard uses tables to determine PPE based on incident energy.
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Question: A 'Category 1' electrical shock hazard is defined in the CSA Z462 standard as:
Answer options:
- The lowest level of risk.
- A hazard requiring insulated gloves but no suit.
- A hazard requiring a full arc-flash suit. ✅ A hazard with an incident energy of 1.2 to 4 cal/cm².
Correct answer: A hazard with an incident energy of 1.2 to 4 cal/cm².
Explanation: CSA Z462, Workplace electrical safety, previously used Hazard/Risk Categories (HRC). The updated standard uses tables to determine PPE based on incident energy. An incident energy between 1.2 and 4 cal/cm² is a common threshold for requiring specific levels of arc-rated PPE.
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