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Crane Operator Certification Exam Prep · Question

During the setup of a mobile crane, Ontario Regulation 213/91 (Construction Projects) requires what specific action regarding electrical power lines?

Ontario Regulation 213/91, Section 188(4), requires that if it's not practical to keep equipment a safe distance from power lines, the lines must be de-energize

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Question: During the setup of a mobile crane, Ontario Regulation 213/91 (Construction Projects) requires what specific action regarding electrical power lines?

Answer options:

  • The crane must always maintain a minimum clearance of 3.0 m (10 ft) from power lines, regardless of voltage. ✅ The power lines must be de-energized or isolated if the crane must operate closer than the minimum safe limits.
  • A dedicated spotter must be present whenever operating within 15 m (50 ft) of power lines.
  • Only non-conductive slings should be used when working near power lines.

Correct answer: The power lines must be de-energized or isolated if the crane must operate closer than the minimum safe limits.

Explanation: Ontario Regulation 213/91, Section 188(4), requires that if it's not practical to keep equipment a safe distance from power lines, the lines must be de-energized, isolated, or a protective physical barrier installed to prevent contact.

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