If you discover a damaged cable during an inspection, which steps should you take?

• A. Ignore it if insulation appears undamaged.
• B. Isolate the circuit, label, do not energize, repair or replace the cable, retest insulation and continuity afterward.
• C. Wrap with tape and continue.
• D. Replace the entire installation.

Answer: (B)

When you discover a damaged cable, the priority is safety. The proper steps are to isolate the circuit, label it, not energize it, repair or replace the damaged cable, and then retest insulation and continuity before restoring power.

Start by ensuring the circuit is de-energized. Turn off the supply at the appropriate disconnect or breaker, and use a suitable tester to verify there is zero voltage on the conductors. This prevents shock or further injury while you work. Then apply a clear label or lockout/tagout to prevent anyone from re-energizing the circuit while the repair is being made, and keep others aware of the hazard.

Next, repair or replace the damaged cable using the correct type and rating for the circuit. That means removing the compromised section or replacing the entire conductor as required, and ensuring the insulation, sheath, and connections are done to code with proper mechanical protection.

Once the repair is complete, retest the system. Check insulation resistance and continuity to confirm the circuit is safe and electrically sound before re-energizing. Only then should power be restored.

Why the other options aren’t suitable: ignoring the damage is dangerous and violates safety and code compliance; wrapping with tape does not restore proper insulation or mechanical protection and can hide the fault; replacing the entire installation is excessive for a single damaged cable and wastes resources when a targeted repair suffices.