An operator is preparing to lift a 5,000 kg steel beam alongside a busy, unprotected road where overhead power lines are present. The power lines are marked as 69 kV. What minimum distance must be maintained from these lines according to CSA Z150 to ensure safety, and what additional precautions might be necessary?

Question: An operator is preparing to lift a 5,000 kg steel beam alongside a busy, unprotected road where overhead power lines are present. The power lines are marked as 69 kV. What minimum distance must be maintained from these lines according to CSA Z150 to ensure safety, and what additional precautions might be necessary?

Answer options:

• 3.0 metres; implement a spotter.
• 4.5 metres; barricade the area and appoint a qualified signaler. ✅ 6.0 metres; de-energize the lines or ensure no part of the crane enters a 6.0m exclusion zone.
• 7.5 metres; conduct a toolbox talk on powerline safety.

Correct answer: 6.0 metres; de-energize the lines or ensure no part of the crane enters a 6.0m exclusion zone.

Explanation: For lines over 75 kV up to 150 kV, CSA Z150 Table 1 requires a 6.0-metre minimum clearance. Additional precautions like de-energizing or establishing a strict 6.0m exclusion zone with a dedicated signaler are critical for such high-voltage lines, especially near public roads.