What should be done to prevent a deenergized line from becoming energized by induction?

Grounding a deenergized line is the most effective method to prevent it from becoming energized by induction. When a transmission line is energized, it can induce voltage onto adjacent lines, presenting a risk if those lines are inadvertently assumed to be deenergized. By grounding the deenergized line, you provide a direct path for any induced current to flow to the ground, thereby neutralizing any potential voltage that might be present due to induction.

This mitigation technique ensures safety for personnel working on or around these lines, as it significantly reduces the risk of electric shock. Grounding helps maintain safety protocols in electrical work, especially when working close to lines that may still hold some induce voltage from nearby energized lines.

While insulating the line, disconnecting it from all circuits, or covering it with a protective case may seem like plausible safety measures, they do not specifically address the issue of induced voltage. Insulation may prevent physical contact but does not eliminate induced voltage. Disconnecting from circuits can help, but without grounding, there remains a risk from induced voltage. Covering the line provides some protection against accidental contact but fails to address the cause of the problem—induction itself.