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How Electricians Assess Lightning Damage to Home Wiring

Last updated October 25, 2026

The short answer

Initial Safety Check and Power Shutdown

Before any inspection begins, the pro makes sure the main breaker is off. This step protects both the electrician and your home from a live circuit. Lightning can leave wires energized in unexpected ways, so treating every wire as live is the standard approach.

The pro also checks the grounding system, including the ground rod and bonding connections. A poor ground can make lightning damage worse and harder to detect. If the ground is compromised, that issue gets noted before any further testing proceeds.

Visual Inspection of Panels and Outlets

A thorough visual check covers the electrical panel, every outlet, and visible wiring runs. The pro looks for scorch marks, melted plastic, or discolored metal. These signs often point to the exact path the lightning took through your home.

Loose connections or burnt terminals inside the panel are common after a strike. The pro also examines light switches and ceiling fixtures for similar damage. Sometimes the only clue is a faint burn smell near a receptacle.

  • Check for burn marks near the main breaker
  • Look for melted wire insulation in the attic
  • Inspect outlet faces for discoloration
  • Test each circuit breaker for proper reset
  • Examine the grounding electrode conductor

Testing Circuits with Multimeters

After the visual pass, the pro uses a multimeter to test voltage, continuity, and resistance on each circuit. A lightning strike can create high resistance at a damaged splice, even if the wire looks fine on the outside. These readings help pinpoint hidden faults.

The pro may also use a megohmmeter, which sends a high voltage to test insulation integrity. This tool can reveal breakdowns in wire insulation that a standard multimeter would miss. Insulation damage can lead to short circuits or fire hazards later.

Checking Surge Protectors and Appliances

Lightning often enters through the main panel but can also travel through phone, cable, or appliance lines. The pro tests surge protectors to see if they absorbed the strike. A blown surge protector is a clear sign that your wiring was hit.

Appliances connected to damaged circuits may need individual testing. The pro checks motors, compressors, and electronic controls for damage. If an appliance is fried, it may need replacement, but the wiring repair comes first.

  • Test surge protector status lights
  • Check appliance power cords for burn marks
  • Verify that ground fault circuit interrupters still trip
  • Look for damaged outlets near exterior walls
  • Inspect low-voltage wiring like doorbells and thermostats

Documenting Damage for Repairs

The pro documents every finding with photos and notes, which helps you understand what needs repair. This record is also useful if you file a claim with your insurance company. Policies vary, and your insurer decides what is covered.

After the assessment, the pro gives you a clear list of repairs, from replacing a single outlet to rewiring a whole circuit. Some hidden damage may only appear after the system is back on, so a follow-up check is often wise. If you live in Bonita Springs, keep that report in a safe place for future reference.

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Frequently asked questions

Can lightning damage wiring without visible burn marks?

Yes, lightning can cause invisible damage like melted wire insulation or high resistance at connections. A multimeter and megohmmeter are needed to detect these issues. Even if nothing looks wrong, circuits should be tested after a nearby strike.

Should I turn off my power after a lightning strike?

Yes, turning off the main breaker is a good safety step if you can do it safely. Then call a qualified electrician to inspect the system. Do not touch wet or damaged panels, and see a doctor if you feel unwell from any shock.

Will my insurance cover lightning damage to wiring?

Coverage for lightning damage depends on your specific policy. Policies vary, and your insurer decides what is covered. Check your policy and contact your agent to understand your situation. Documentation from the electrician will help with any claim.

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