Identify a key safety practice when working near energized lines.

Maintaining a safe distance and using insulated tools is a key safety practice when working near energized lines because it significantly reduces the risk of electrical shock or injury. Insulated tools are specifically designed to protect the user from electrical contact, allowing them to work safely in proximity to energized equipment. The concept of maintaining a safe distance is critical as it provides an added layer of protection; even with insulated tools, being too close to energized lines increases the possibility of accidental contact or arc flash.

This practice is fundamental in ensuring that linemen and other workers stay safe while performing tasks that may involve high voltage or live electrical systems. By consistently following this safety measure, workers can effectively minimize risks associated with working near or on energized lines.