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Old 07-15-2019, 03:08 PM   #1
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Default Odd how this lightning struck.

Couple year old house got hit by lightning. Went to remove the d/w and ice maker because they weren't working. The odd part is how the lightning struck the house and came up where it did, or whatever it does. Blew up the tile into the bottom panel bending it pretty good, put those dents in the door, melted the insulation on the d/w panel, tile shards embedded in it. D/w would not turn off, ice maker didn't seem damaged but it didn't work.

Homeowner was in the kitchen a few feet away when it happened. So loud she said she thought there were gun shots. Luckily no injuries.
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Odd how this lightning struck.-20190715_094422.jpg  

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Odd how this lightning struck.-20190715_094710.jpg  

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Old 07-15-2019, 08:50 PM   #2
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Id be checking the grounding system of the house, that should not have happened,maybe a missing grounding rod by the electrical panel or something else not right..
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Old 08-09-2019, 07:45 AM   #3
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Is this a concrete floor? What soil type? I see ground rods set in mostly loose soil sometimes, that creates resistance. That can allow a strike to follow a different path to ground.

Newer systems should have a concrete encased electrode along with a good ground rod. This bonds the whole concrete footing to the earth instead of just a single rod. People miss the section in the NEC stating "likely to become energized". This could also be a close strike where a static charge jumped. Seen that happen to the old parker flex where a static charge popped a hole in a section inside a fireplace chase.


Copper water service, gas piping, steel construction, re-bar should to ties together to form a bonding field eupher ground. To much energy to safely get through a single 1/2" or 3/4" rod to ground.
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Old 08-12-2019, 09:55 AM   #4
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Quote:
Originally Posted by GAN View Post
Is this a concrete floor? What soil type? I see ground rods set in mostly loose soil sometimes, that creates resistance. That can allow a strike to follow a different path to ground.

Newer systems should have a concrete encased electrode along with a good ground rod. This bonds the whole concrete footing to the earth instead of just a single rod. People miss the section in the NEC stating "likely to become energized". This could also be a close strike where a static charge jumped. Seen that happen to the old parker flex where a static charge popped a hole in a section inside a fireplace chase.


Copper water service, gas piping, steel construction, re-bar should to ties together to form a bonding field eupher ground. To much energy to safely get through a single 1/2" or 3/4" rod to ground.
Excellent summary. I just learned something today.
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