[MandoMan]

Originally Posted by Robbie0723

Interesting point...

In Southeast, Ground Rods May Not Protect Homes Against Lightning - News - University of Florida

Interesting article. Thanks. There was a piece on this topic in this morning’s online news for TV, and it said “ Consider providing an LPS that has been protecting people and property world-wide for over 260 years. They have been the subject of numerous studies over the decades including rocket-to-wire triggered lightning research at the University of Florida.” But that is the study to which you link, and that study showed that the usual 8’ lightning rod hammered into the ground allows OVER 80% of the current from a direct strike to hit the electric meter! So, yes, research, but the research showed that the usual rod doesn’t work! What works is a big ring buried deep in a big hole or a loop of wire buried all the way around the house. There goes the landscaping! Is that what installers are putting in, or just a rod?

I wonder if daily rains and daily watering helps increase the effectiveness of a rod. Nearly all our lightning comes during the wet season.

[Phpb2]

Temperature of lightening? 50,000 degrees! Copper melts at 1984 degrees! Save ur money!

[dewilson58]

Originally Posted by Phpb2

Temperature of lightening? 50,000 degrees! Copper melts at 1984 degrees! Save ur money!

Bingo.

[crash]

Originally Posted by villagetinker

Glad to hear that, just out of curiosity, do they do periodic tests, say every 5 years?

If you call them they will inspect. The inspection is $100.

[Altavia]

Originally Posted by MandoMan

Interesting article. Thanks. There was a piece on this topic in this morning’s online news for TV, and it said “ Consider providing an LPS that has been protecting people and property world-wide for over 260 years. They have been the subject of numerous studies over the decades including rocket-to-wire triggered lightning research at the University of Florida.” But that is the study to which you link, and that study showed that the usual 8’ lightning rod hammered into the ground allows OVER 80% of the current from a direct strike to hit the electric meter! So, yes, research, but the research showed that the usual rod doesn’t work! What works is a big ring buried deep in a big hole or a loop of wire buried all the way around the house. There goes the landscaping! Is that what installers are putting in, or just a rod?

I wonder if daily rains and daily watering helps increase the effectiveness of a rod. Nearly all our lightning comes during the wet season.

I thought the article also said a surge protector at the meter prevented damage? High cost devices should also be protected by surge protectors at their power connection.

The gas line on new homes, where gas is run through the attic, is a lightening rod... A recent local strike went in at the attic gas line and exited at the tracer wire/meter ground.

Looks like the spec's call out less than 25 ohms resistance between grounding rods so maybe that can be checked.

[Ele201]

I’m considering buying in Chitty Chatty, but a little concerned about lightening. There are electrical wires strung above some homes there. Could this be dangerous? Thanks

Originally Posted by Robbie0723

Will be making calls on Monday - are any approvals required prior to installing a lightening protection system?

[Lightning]

Originally Posted by Robbie0723

Will be making calls on Monday - are any approvals required prior to installing a lightening protection system?

There are no permits or follow up county inspections for lightning rods. This is a buyer beware market place. Therefore, consider only firms that are listed by Underwriters Laboratories and their installers have been qualified as a Master Installer by exam offered by the Lightning Protection Institute. Not all listings in the yellow pages will meet this criteria nor will door-to-door sales. Lightning rods have only three parts, the point (rod) placed on the roof according to NFPA-780 the national standard on lightning, braided aluminum or copper wire to connect the rods, and ground rods. . There will two, three, or four driven ground rods depending on the size of the home. These are 5/8th inch copper clad steel rods 8 ft (or more) driven 2 ft below grade outside of the drip line from the eaves.. The installer will drive enough driven rods to the proper depth so you do not have to worry about soil conditions. Remember the utilities in this state have been grounding in this soil for over a 100 years!

[TheMoyers]

I am a retired licensed professional engineer (PE), and I did have a system installed on our home here in TV. No permit was required. I have a MAJOR recommendation. Get it UL approved. Underwriter's Labs has specific standards for these systems, and if you get it approved, you will have a UL inspector come and verify that rods are properly spaced, and the grounding system mentioned by other people who responded to you, has been properly done and tested. The UL inspector took actually readings (in ohms), and ensured mine were well within the required standard. And yes, it is not required, but if you want to keep the UL approval, you will need to have it checked periodically. I do ours every 3 years.
The UL stamp costs a few hundred dollars extra. But here is what it is worth it, and why rechecks are important. There are numerous electrical connections between the roof rods, cables, and grounding rods. A cheaper system might use connectors and components that give acceptable ohm readings on installation, but as time goes by the different metals corrode at different rates, and you might find that 5 years later you have a system that has too high an ohm reading, hence ineffective.. The UL inspector checks those materials, and a recheck periodically ensures it.

[bluecenturian]

Had A1 Lightening Protection install rods about 2 years ago. Had a direct hit 3 weeks ago and only damage was a plant that was next to the ground wire. Highly recommend the system especially for anyone south of 44 with natural gas.

[Ashley from UK]

Originally Posted by Ele201

I’m considering buying in Chitty Chatty, but a little concerned about lightening. There are electrical wires strung above some homes there. Could this be dangerous? Thanks

Ele - VERY WISE DECISION to be looking at Chitty Chatty... no bias from me being the 3rd person to complete on a designer home in Chitty Chatty and the founder of the Chitty Chatty Residents Facebook page which is used to organise village events and gatherings, pass on recommendations (and warnings) of contractors and generally just assist all residents.

To put your mind at rest there has only been one lightning strike in Chitty Chatty that I am aware of - my house! The lightning hit the ground and (according to the loss assessor) travelled through the irrigation system blowing the garage door opener, a number of LED lights, and the irrigation system timer. I had Villages insurance who sorted out the claim and Exceptional Electrics were brilliant in resolving the matter swiftly. My claim was paid out in full. Lightning rods would not have saved me in this instance. My home is on the lake so some way from the power lines. So I can say that the in the past year the power lines have not been an issue.

The Village Newcomers did a review on lightning protectors in their 21st June Mailbag Monday. They found only around 3 homes in over 100 had lightning protectors.

[irishwonone]

Originally Posted by villagetinker

What is the age of your roof? The reason I ask is the lightning protection system will need to be removed and reinstalled after the new roof is installed, and I would check to see if this would interfere with any warranty for the new roof.

Great point.

[irishwonone]

Originally Posted by LuckyS

Is it true, due to the soil here the lightning rods aren't effective. Could a non-biased expert chime in?

Yes that’s incorrect. Commercial buildings all across Florida have lightning rods. Sandy soils are much easier to drive lightning rods versus clay soils.

[butlerism]

The only approval I am aware of..... Getting your wife's approval to hold the lightning rod in a rain storm.
That one may prove tricky

[lorilorilori]

Originally Posted by Robbie0723

Will be making calls on Monday - are any approvals required prior to installing a lightening protection system?

Please share results of your call.
time frame ?
price?
# of rods
type of home ?

TY

[tgloo99]

Originally Posted by villagetinker

I am a former electric utility engineer, we had to do lots of lightening protection for substations and occasionally large metal poles. In general at locations with substandard ground resistance there were special means used to get good ground connection so we had good lightning protection. Special protection could include extra deep ground rods, chemicals added to 'ground wells' to decrease the resistance to earth, and finally very extensive ground mats that consisted of 4-0 copper wires in a grid layout. Florida soils tend to have a lots of sand which is an insulator, so it seems reasonable that you may need extra depth ground rods or many more ground rods. I am NOT an expert in these systems, just presenting some experience from my work in the electric industry.

Do you have lighting protection on your home...?