Practice Quiz

Red Seal Construction Electrician

Category - Construction Electrician

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A shock risk assessment has been completed for the task of racking in a breaker into a live MCC section and it the following values have been determined: Limited approach boundary - 3.0m , restricted approach boundary - 0.7m , arc-flash boundary - 1.5m. A non-electrically qualified worker standing 2.0m away from the breaker is:
  1. Compliant if wearing high visibility PPE.
  2. Compliant if escorted by a qualified worker and advised of the hazards.
  3. Compliant if advised of the hazards and given verbal approval by the site foreman.
  4. Non-compliant; a non-qualified worker can never enter the limited approach boundary.
Explanation
Answer: B. Explanation: CSA Z462 4.3.4.6.3 states that where there is need for an unqualified person(s) to cross the limited approach boundary, a qualified person shall advise him or her of the possible hazards and continuously escort the unqualified person while inside the limited approach boundary.
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