Under which condition can overhead lines be treated as not energized for maintenance?

• A. When it is known to be de-energized, tested de-energized and grounded
• B. When the employee feels it's safe
• C. When there is a permit
• D. When the weather is good

Answer: (A)

Only when overhead lines are known to be de-energized, verified by testing, and grounded can they be treated as not energized. This is essential because electrical energy can linger in capacitors, develop induced voltages, or be present from backfeeds even if the line looks quiet. Verifying de-energization with proper tests confirms that there is no live potential, and grounding provides a safety path to ensure any residual or fault currents are safely diverted, protecting workers during maintenance. Relying on a feeling of safety isn’t reliable because energized conditions can exist without obvious signs. A permit authorizes work but does not by itself guarantee that the lines are de-energized. Weather conditions also do not determine the electrical status of the lines.