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What is the safe limit of approach for working near power lines of 500 kilovolts?

Select one:

A. 1 metre

B. 7 metres

C. 3 metres

D. 4 metres

Answer :

When working near high voltage power lines, it is crucial to maintain a safe distance to prevent electrical hazards such as electric shocks and arcs. The safe limit of approach is the minimum distance that must be maintained to ensure safety for individuals working near these lines.

For power lines carrying 500 kilovolts (kV), the safe limit of approach is typically 7 meters. This distance accounts for factors like the potential movement of the lines due to wind and the need to ensure that no tools or equipment breach this safety margin.

Let's break down why maintaining such a distance is necessary:

  1. Who Needs to Know: This information is crucial for anyone involved in construction, maintenance, or any activity that requires working near electrical power lines.
  2. What It Means: Maintaining a 7-meter distance ensures that even if equipment or individuals inadvertently reach towards or move near the power lines, they remain safe from a potential arc flash or electrical contact.
  3. Where & When to Apply: This guideline is applicable universally wherever 500 kV power lines are present, especially at construction sites, maintenance zones, and any high-risk areas near these power lines.
  4. Why It's Important: The high voltage in these power lines can cause serious injury or fatal accidents if approached unsafely. The electromagnetic field around such lines can cause electricity to 'jump' if too close.
  5. How to Implement Safe Practices: Always conduct a risk assessment before approaching any high-voltage area, use appropriate safety gear, and ensure all team members are aware of the safe approach distances.

Therefore, the option b. 7 metres is the correct answer.

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