Why is it important to disconnect power before replacing a damaged wiring harness?

• A. To prevent electrical shock and equipment damage
• B. To keep the workspace neat
• C. To slow down maintenance
• D. To avoid wearing gloves

Answer: (A)

The main safety concept is de-energizing electrical systems before you work on them to prevent harm and protect equipment. When a wiring harness is damaged, live conductors can be exposed. If power is left on, touching or disturbing those conductors can cause electrical shock, arcing, short circuits, or even fires, and can also damage other components in the system. Disconnecting power removes the energy source, and verifying it is off (with proper lockout/tagout procedures and a meter) keeps you safe and reduces the risk of further damage. Keeping the workspace neat or trying to rush through the task doesn’t address the live-energy hazard, and wearing gloves alone won’t protect you if power remains present.