Explain the process of “de-energizing” a line.

De-energizing a line is a critical safety procedure in electrical work, especially for linemen who are preparing to conduct maintenance or repairs. The correct process involves switching off the electricity supplying the line and isolating it from any power sources. This ensures that no live electrical current is present, which is crucial for the safety of workers who will be approaching or working on the line.

Isolating the line from power sources involves not just turning off the switches, but also securing the line so that it cannot be accidentally re-energized. This may include placing physical barriers, using lockout/tagout procedures, and ensuring all sources of electricity to that line are safely disconnected. This method effectively removes the risk of electrocution or electrical fire during maintenance, which is essential for maintaining safe working conditions.

Other methods mentioned, such as reducing power output gradually, lowering the line to the ground, or coating the lines with insulating materials, do not effectively eliminate the risk of electrical shock or hazards associated with energized equipment. These practices might contribute to safety in different contexts but are not appropriate for the strict operational process of de-energizing a line before maintenance work.