Home » Electrical Wiring Directory
« »


Lightning Strikes Can Damage Electrical Wiring

   
©Copyright - Summary:

We had a lightning strike our tree in our front yard. A circuit breaker tripped in the breaker box. It would not reset…


Lightning Strikes Can Damage Electrical Wiring
Background: Al, a Homeowner from St. Louis, MO

Question: We had a lightning strike our tree in our front yard. A circuit breaker (not GFI) tripped in the breaker box (15A). It would not reset. I replaced it with a new 15A breaker and it tripped as soon as I set it. I pulled the wires from the electrical panel (black, white and ground) and across the black/white wires I have ~20 ohms. Need your help! How do I troubleshoot this problem?

Dave’s Reply:
Thanks for your electrical question Al. Lighting strikes can cause damage to wiring which will require identification and repairs or replacement wiring.

The Following links will assist you with your electrical question:

Electrical Junction Boxes
Electrical Code for How Many Wires in Junction Boxes

Circuit Breakers
House Wiring Circuits and Circuit Breakers

Circuit Wiring
Electrical Panel Circuit Listing

GFCI Outlet Wiring

Lighting For The Home
Lighting Electrical Codes

Electrical Panel Circuit Listing

Electrical Wire for the Home

For more information about Home Wiring
Home Wiring Diagrams

This link is helpful as a Homeowner
Do-It-Yourself Electrical

Make sure not to miss these Resources for: More about Outlets
Wiring Outlets


« Wiring a Ceiling Fan In An Older Home Electrical Wiring Diagrams and Symbols »


Learn How to Wire it Right with my
Complete Guide to Home Electrical Wiring
Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electrical Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
Troubleshooting and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
Electrical Codes for Home Electrical Wiring
....and much more.

» Click here to learn more about Home Electrical Wiring «
  repair electrical wiring  


Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all projects.

Comments

6 Responses to “Lightning Strikes Can Damage Electrical Wiring”
  1. Mitchell says:

    ok thank you for your answer. really appreciated

  2. Mitchell says:

    i replaced the plug that the transformer to the rain softner was in and its working i plugged my water bed into the outlet and the heater is working all the outlets in the room work. when i use my meter to test for power all the outlets and the light switch send the meter into a scream but when i put the meter up to the wires at the fan really low sound from meter and that’s putting the meter close to the attic hole. does that help at all.

    • Dave Rongey says:

      Mitchell, it is hard to say because I am not there, so I cannot perform the electrical tests, and I do not know what type of tester you are using which is producing the results you are hearing, and there is not just one type of test that is performed.

      For your safety, I suggest that you get a licensed electrician in your area to come out and check the home electrical system.
      Dave

  3. Mitchell says:

    lighting struck my watersoftner transformer that was plugged into the wall and blew it to pieces, also the fan and the light switch was hit. black smut was on the wall around to switch and the fan speed regulator was blown apart. i got a new fan and new swtich, the switch has power checked by meter. but the fan does not. could the wires from the switch to the fan through the attic be damaged? do i need to replace them? with the switch off i get 1.150 volts, with the swtch on i get .142

    • Dave Rongey says:

      Hi Mitchell,
      It sounds like your home took quite a hit. I have repaired a few homes with similar damage, it is best to check all of the circuits, but the main panel will need to be checked first to see if it has sustained damage, then all of the circuits will need to be tested one at a time. This is a very lengthy process because it may involve removing all of the connections in the main panel, then testing each individual wire to a ground source with a Megger meter which charges the circuit and checks for voltage leaks, and all devices must be disconnected before this test can be performed. The wiring in the attic should be checked as well paying close attention to anywhere where the wiring is close to metal pipes or any grounded objects. I have seen wiring blow out through the side of the insulation and arc to a gas pipe which was grounded. That home had damage to all of the electrical devices, even the phones and alarm system was damaged.
      Needless to say, this is best performed by a licensed electrician who knows how to make these tests and repairs.
      Check with your insurance company and hopefully this will be covered.
      Best of luck,
      Dave

Click here to Ask a Detailed Home Electrical Question and get an Instant Reply.

To Our Valued Visitors:
If you are asking a Quick Question please make sure it is about The SAME TOPIC:
Lightning Strikes Can Damage Electrical Wiring


Comments Posted here are Open for Quality Discussion and Participation.



*