Why should trolley and feeder wires be insulated?

Insulating trolley and feeder wires is essential primarily to prevent electrical shocks. Insulation serves as a barrier, preventing direct contact with the conductive materials within the wires. When a person or equipment comes into contact with uninsulated wires, there is a very real danger of electrical shock, which can cause serious injury or even fatality. Insulation helps ensure that electricity flows safely through the wires while keeping it contained, promoting a safer working environment, especially in mining operations where workers are frequently in close proximity to electrical equipment.

While increasing lifespan, aesthetic reasons, and reducing electrical noise may be considerations in certain contexts, they do not directly address the primary safety concern associated with these types of wires. Ensuring personnel safety and preventing accidents is the foremost priority, making insulation of these wires critical in maintaining safe operating conditions in mines.