A loader operator is working in an area where overhead 230 kV transmission lines cross the site. A spotter equipped with a two-way radio is present. What is the minimum approach distance (MAD) that the loader, its bucket, or any equipment attachments must maintain from these lines, assuming no lockout/tagout (LOTO) and no insulating barriers are in place?

Question: A loader operator is working in an area where overhead 230 kV transmission lines cross the site. A spotter equipped with a two-way radio is present. What is the minimum approach distance (MAD) that the loader, its bucket, or any equipment attachments must maintain from these lines, assuming no lockout/tagout (LOTO) and no insulating barriers are in place?

Answer options: ✅ 7.5 metres

• 9.0 metres
• 6.0 metres
• 4.5 metres

Correct answer: 7.5 metres

Explanation: For overhead power lines energized between 150.1 kV and 250 kV (such as 230 kV), typical Canadian OHS regulations and safety codes (e.g., Electrical Safety Authority) require a minimum approach distance (MAD) of 7.5 metres for equipment and its attachments to prevent lethal electrical contact or arc flash, even with a spotter present.