With the price of copper on the increase, and the ever present nature of thieves, a business in Altamonte Springs, Florida has experienced huge losses of copper cable. Since July, six thefts have been reported. To date, the firm’s losses have been 8,000 feet of cable valued at over $9,000. Fortunately, for the business owners, not the thieves, a security camera that was installed in an ideal location produced an image of the copper culprit. Police are hopeful that someone who sees the picture will recognize the thief and call them with information.

To see the photo or watch the video report, use this link to WESH news.

In support of an earlier post, where I stated that men are more likely to be struck by lightning, especially golfers, I offer the following.

On the 25th of October, a golfer who was enjoying his weekly round of golf with friends at the Tanah Merah Country Club near Singapore got an unexpected handicap as he neared the end of an 18-hole game. Soh Lye Huat, who owns a garment company, was struck by lightning and transported to the local hospital in a coma. tmcc

The country club manager, Roy Higgs, had noticed the skies were turning a little dark and begun the process of checking with Meteorological Services to determine if a warning should be issued when the 57-year-old was hit.

While your chances of having an up close and personal experiencing with a bolt of lightning are not that great, with approximately 16 million thunderstorms around the globe each year there is plenty of opportunity, especially if you’re a golfer.

Take cover at the first sign of a storm cloud forming and you’ll live to enjoy another round.

Read the full story on the Malaysian Insider.

By Frank Ross

If you are here because you have questions about protecting your home or business from lightning strikes, and are wondering if it is a good investment, consider that damage to electrical components and appliances is only one aspect of the dangers of lightning. Fire caused by lightning is far more devastating, and the resulting costs far more extensive.

In a study period that spanned from 2002 to 2005, only 16% of reported lightning fires occurred in homes; however, these fires accounted for nearly all the associated civilian deaths, 90% of the associated injuries, and 58% of the direct property damage.

During this same period, fire departments in the U.S. responded to an estimated annual average of 31,400 fires caused by lightning strikes. In human terms, on an annual basis, that is an average of 12 civilian deaths and 57 civilian injuries. On the financial side, these fires resulted in direct property damage totaling $213 million.

Attraction or protection

A commonly held misconception is that lightning rods attract lightning. In fact, a lightning protection system simply intercepts a lightning strike and channels its damaging voltage down a low-resistance cable and into the ground where it can be discharged harmlessly.

Another common misconception is that having a grounding rod to your electrical panel protects you from lightning. This grounding rod is strictly for the safety of your homes electrical wiring system, and offers absolutely no protection from lightning. Also, having a TV antenna that is grounded not only doesn’t offer protection, it can allow dangerous high voltage to enter the home through its wiring or directly through the stand-off clamps that secure it to your home.

Surge protection vs. lightning protection

Some people think they have protected their valuable computers and home entertainment centers by purchasing a surge suppressor or APC. These devices serve an important purpose in handling the daily variations in the public power supply that is provided to your home, but they are virtually worthless in the case of a direct lightning strike to your home. In fact, you’ll have to replace these devices as well as the components you thought you were protecting, should your home suffer a direct hit.

Most people aren’t aware of the many fluctuations in public power sources, but if you’re paying attention, you’ll often see lights dim in your home for a second or two. These surges are caused by a number of events in the distribution system, and the resulting temporary drop, followed by an equal or higher increase can cause extensive damage to electrical components. Good surge protection is a must, but it is no substitute for a lightning protection system.

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"Thru-Roof" Concealed Base Assembly includes one 15" stem, watertight neoprene washer, nailing bracket and cable connector, with a stem adjustment screw for exact mounting of threaded Solid Shank Air Terminal.

Properly designed and professionally installed lightning protection systems have been proven to completely protect structures from the devastating effects of a direct lightning strike. A properly designed system takes into consideration a home or office building’s design, construction, soil condition, surrounding environmental elements such as water or tall trees and of course the electrical components inside. A lightning protection system can be concealed within the roof and walls, making it very unobtrusive. While an installation is easiest and least expensive during new construction, it can still be very affordable as a retrofit.

When you compare the costs of a lightning protection system to the majority of home improvements, lightning protection is one of the least expensive upgrades you can add to your home. It provides peace of mind and proven protection for your family, home and valuables.

Copper offers the best conductive qualities for electrical components. View Storm’s excellent line of grounding products.

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The worst hit areas were Brisbane's northern suburbs and Ipswich. (ABC TV News - file image)

Chaos rained at the Brisbane Airport last night as storms raged across south-east Queensland, Australia. While the storm brought much-needed rain to a parched region, lightning from the storm blacked out about 22,000 homes and businesses.

The worst hit areas were Brisbane’s northern suburbs and Ipswich, west of the city.

Electricity maintenance crews are gradually restoring power in south-east Queensland this morning.

The storms also brought down powerlines on the rail line at Lindum in Brisbane’s east, causing problems on the Cleveland line.

Read the full story at http://www.abc.net.au

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Emergency personnel transport victims of a lightning strike.

During a storm that authorities called a “weak and localized” event, two young boys and the mother of one were seriously injured recently when lightning struck a soccer field in Brampton, Ont. One witness described it as a “fireball.” The trio were struck on a soccer field at Centennial Park, near Queen Street East and Main Street at about 2:20 p.m.

The boys, aged four and six, were in critical condition in the Hospital for Sick Children in downtown Toronto, while the mother was in serious but stable condition at Brampton Civic Hospital, said hospital spokesman Todd Leach.

Unfortunately, it is often the first bolt of lightning from a storm that catches people in an unprotected position. Learn the warning signs of an impending lightning strike and seek shelter at the first sign of danger. Many lightning victims report the hair on their arms and neck standing erect from the static charge build up, and a metallic taste in their mouth. While these warning signals are most obvious, they often come too close to an actual strike to seek a safe location. When you see storm clouds forming, it is best to start looking for a safe location to wait its passing sooner than later.

For the rest of the story, visit CBC News.

By Frank Ross

To understand how to protect your home and family from the dangers of lightning, you first need to understand a bit about how lightning forms, what creates this powerful display, and what causes it to “strike.” Just this week a friend asked, “Just how does lightning pick a target?”

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Photo by Dr. Ray Franco, PhD., PE.

After a direct hit to a business or home, sometimes people feel that lightning singled them out as a target. While a guilty conscience may cause one to feel like they were perhaps deserving a lightning bolt, a bolt of lightning is an impersonal force. Although somewhat subject to the whims of chance, physical characteristics of your home and the terrain it is positioned on, as well as surrounding trees, the type of soil, power lines, etc. have more of an impact on the location of a strike. Another thing to keep in mind; the old adage which states “lightning never strikes in the same place twice” is a myth. Many towers and tall buildings are struck repeatedly by lightning, so don’t think that because you had a recent direct hit that you’ve experience a once in a lifetime shot. It could happen again tomorrow. In the long run, a proactive approach is the best insurance.

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Lightning damage is visible on this AC compressor, photographed by Dr. Ray Franco, PhD., PE.

Lightning is a massive flow of electrical current that occurs between storm clouds and objects on the earth. This flow of current occurs when positive charges on the earth and negative forces in the clouds build up until the potential is great enough to jump between the distances which separate the various tall objects arrayed along the surface of these two opposing charges. When the buildup of the downward force in the clouds is sufficient and the two opposites come ever closer toward each other, the difference in both charges intensifies until a stepped leader thrusts downward toward an object on the ground with the highest potential force.

The path of the stepped leader is erratic, and very fast. Positive charges are attracted by this probing leader and reach up from roof tops, tall chimneys, antennas, electrical equipment on roofs or power poles. When the leader connects to the opposite charge, it creates a closed circuit and the massive build up of electricity is bled off in a blinding flash of white-hot light.

For a homeowner a direct hit can wipe out all types of electronic devices, not to mention the potential for a serious fire, roof and other structural damage. If a good insurance policy with a low deductible is in place, it’s only a minor inconvenience to make a few phone calls and schedule the repairs. Sometimes it may take a few days, but the worst thing you have to do is talk on your cell phone while the home phone is out, and watch the game next door while you raid their refrigerator at halftime. On the other side of the coin, if you have an expensive large-screen television, an expensive surround sound system, several home computers, a security system, electronic garage doors, an air conditioner and any of the many kitchen appliances damaged, you should take a serious look at protection that goes beyond running around jerking plugs out of outlets.

When a business takes a major hit, it can mean a serious loss of income from irate customers that can’t get a timely response while phones are knocked out and sales or customer records can’t be accessed on the company’s fried computers. Companies with production facilities can experience excessive down time in automated production lines, causing missed delivery and canceled contracts. Property damage can run into serious money, draining or diverting capital from other pressing projects, not to mention the jeopardy of repeated insurance claims can have on renewal.

Some people have to take a direct hit and feel the pain of a major financial loss before they invest in a lightning protection system, while others are more proactive and seldom flinch when a strike hits nearby.

Want to be proactive? Read on.

By Frank Ross

rods

The classic Franklin point design, and the more blunted version of modern lightning rods.

In any lightning protection system, the soldier manning the front line is the air terminal. This simple component is engineered to intercept the downward-moving stepped leader by launching an upward-reaching attachment spark that will serve to close the circuit and direct the flow of current to a solid grounding device, away from a structure and expensive electronics.

Even if you’ve never seen an air terminal in person, more than likely you’ve seen pictures of them on tall buildings, barns, and homes. Most likely the end of the air terminal you’ve seen was very sharply pointed. The theory behind the sharp point design is that it causes the largest electric field and hence is more likely to launch the attachment spark. Sharp pointed air terminals, originally designed by Ben Franklin are a time-honored concept; however, recent research has revealed that blunt rods are slightly more effective in accomplishing this job.

Since Franklin’s initial invention in 1749, there has been controversy between American supporters of Franklin’s design and British scientists that insist the rod should have a round ball on the end. In recent years there has been a great deal of research with far more sophisticated monitoring and measuring equipment which actually proves neither was correct.

Perhaps it was the politically charged atmosphere between the British and the Americans during the early days of this country’s development that caused Franklin and other American supporters to stand doggedly behind his pointed design, but more than likely it was the limited tools at his disposal for accurately analyzing the effectiveness of either. Remember the kite and key experiment? That came about because of repeated delays in the construction of a church steeple that was to utilize one of his lightning rods. Regardless of the choice, neither kite nor distant observations of a church steeple would have provided much more than anecdotal evidence.

Many modern physicists have shown that, under strong electric fields, the air around sharp rods becomes ionized. This ionized air creates space charges that act to weaken the fields of electricity building up and flowing from ground to components atop roofs, towers and similarly susceptible structures. In both laboratory and field experiments scientists have established that critical field strengths for lightning interception develop more quickly around moderately blunt or blunt lightning rods that those with sharp points.

The most effective air terminal is one with a radius of curvature between 3/16 and 1/2 inch. This is not to say that pointed terminals should be avoided or replaced. They are effective, but moderately blunt or blunt terminals are just more effective.

I’ll get more into components and other aspects of a lightning protection system, to give you a general understanding of how these components make up a protection system and how that system works; however, you should always seek the advice of an engineering specialist with specific knowledge of lightning protection.

In the meantime, Storm Grounding has a complete line of top quality rods, mounting brackets, grounding cables and grounding rods viewable at Stormgrounding.com.

Other links of importance:
United Laboratories Installation Guidelines

Residential Lightning Protection and Grounding

Arborist (Tree-Top) Lightning Protection and Grounding

Barn and Outdoor Structure Lightning Protection and Grounding

By Frank Ross

fishing_storm

Fishing in open water can be very dangerous when a storm starts to build. Watch for storms building quickly and head for safety before that first bolt of lightning. Photo by Frank Ross

When reviewing the statistics accumulated from incidents where humans have posed as lightning rods, one might consider these massive charges of electricity are out to get even with men for some unknown offense, or perhaps lightning is attracted to hairy bodies filled with testosterone. The fact of the matter is men are more likely to be found outdoors in their work and play. While women of this generation are more prevalent in the various jobs that require outdoor “offices”, the majority of professions performed outdoors are staffed by men. As well, there are many ladies who play golf or tennis and enjoy a day on the water fishing or boating, but again, it is men that are the predominate species that spend an inordinate amount of time flailing the air with clubs that have metallic shafts, or bobbing in boats with long rods sticking up in the air.

It is also men, in my personal experience, that are more inclined to think of themselves as somewhat immune to the things that might define them as mortal. Men are more likely to say, “Let’s just finish out this hole and we’ll head in to the clubhouse.” Or, “I’ve got a feeling that big snook will not be able to resist this next cast.” It’s just what men do, and as difficult as it is for ladies to understand us, it’s the nature of the beast.

Ronald L. Holle and Raúl E. López of the National Severe Storms Laboratory and E. Brian Curran of the National Weather Service conducted a study of human interaction with lightning, and between the years 1959 and 1994, men accounted for 84% of lightning fatalities and 82% of injuries.

Fortunately for the wives and families of men, the number of deaths and serious injuries from lightning strikes has diminished over the past 35 years. This study notes 30 percent of the decrease in lightning deaths to improved forecasts and warnings as well as better lightning awareness. More substantial lightning protected or lightning resistant buildings also are a key factor. An additional 40 percent of improvement in this mortality rate is credited to improved medical care as well as communications.

Today, first responders arrive on scene with an elevated ability to treat patients suffering from lightning strikes, and the level of in-the-field trauma care has improved significantly. When you factor in access to medivac helicopters, which are able to shorten the time from impact to intensive care, the potential for a positive outcome from a lightning encounter have improved significantly.

Between 1959 and 1994, the National Weather Service publication Storm Data recorded 3,239 deaths and 9,818 injuries from lightning strikes. In the realm of weather-related deaths, only flash floods and river floods cause more loss of life. Statistically, 20 percent of lightning victims never knew what hit them; they were dead when they hit the ground. The challenge comes for those 80% who survive. Doctors do not understand fully how to treat the myriad injuries that are produced by this brief visitation of excessive voltage and heat.

Medical issues

Since lightning victims are fairly rare, and those that survive are challenged with a wide variety of symptoms, the medical field is wanting for specialists to treat these maladies.

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After a storm has apparently passed is one of the most dangerous times. Just because the rain isn't overhead, doesn't mean that the potential for a lightning strike has passed. Photo by Frank Ross

Treatment of electrical shocks experienced by workers coming into contact with high voltage in industrial accidents are far more common, and most doctors are more familiar with the diagnosis and treatment of these types of injuries. Although similar in nature, the intensity of lightning damage from industrial accidents pales in comparison to lightning. The voltages and amps involved are so much greater and the length of time the electricity is passing through the victim is much greater. Due to modern circuit breakers, industrial shocks rarely last longer than a half second. Lightning strikes are much shorter in duration and most of the current passes over the outer surface of the body in a process called external flashover. Were it not for this curious behavior there would be few survivors of lightning strikes.

Both of these high-voltage encounters result in deep burns at point of contact. In industry accidents the points of contact the upper limbs, hands and wrists are the most often affected entry points. With lightning injuries are mostly focused on the head, neck and shoulders. Sometimes industrial shock victims exhibit deep tissue destruction along the entire current path, while the majority of burns to lightning victims seem to be focus on the entry and exit points. Both types of victims may are often subject to injury from being thrown or falling down, but the leading cause of immediate death for both types of incidents is cardiac or cardiopulmonary arrest.

You might feel lucky to survive, and indeed life with complications is far better than the alternative, but if you survive a shock, the consequences of the electrical burns can be severe and debilitating for a long time. Severe hock and the resulting burns often lead to kidney failure, infection, muscle and tissue damage, and in severe cases amputation of the affected limb or limbs is required. Lightning burns are exceptionally life threatening.

Lightning medical expert, Dr. Elisabeth Gourbière of the Electricité de France notes that 70 percent of lightning survivors experience residual effects. The most common affect the brain, which operates on tiny electrical impulses. Unfortunately, these medical effects can develop slowly, only becoming apparent much later after the electrical shock/lightning strike and are often misdiagnosed because of the time delay.

Do you feel lucky?

Should you feel particularly invincible, and want to test the medical preparedness of your community hospital, schedule your summer golf games for around 4 in the afternoon, and ignore the daily gathering of thunderheads. July is statistically the most productive month for lightning activity, but especially in Florida. If you want to be put directly into the bonus round, time your golf game for Sunday. Sunday has 24% more deaths than other days, followed by Wednesday.  Nationally, most lightning casualties occur in the afternoon, with two-thirds between falling between noon and 4 p.m.

This statistical spike should not be surprising to anyone living in Florida to find out that this state enjoys twice as many lightning casualties (deaths and injuries combined) as any other state in the union. This is most likely caused by two factors. The first is the fact that the state is a peninsula of land jutting into sub-tropical waters that produce massive thunderstorms on a daily basis. Second and perhaps not so obvious, the state is covered with golf courses and tennis courts, encircled and dotted with water filled with fishing boats and pleasure craft.

While Florida may record twice the number of human interaction with lightning, don’t breathe that sigh of relief too soon. Georgia, Tennessee, North Carolina, New York, Pennsylvania, Ohio, Michigan, Colorado and Texas are the next most likely places for candidates to win the lightning lottery.

The commonality of both golf and boating is wide open spaces and the tallest object generally being human. If you were to pick the absolute worst place to be during a storm, it would be walking in an open field or swimming in open water. Other bad practices would be standing in an open area with a long metal rod in your hand, like a golf club, umbrella, fishing rod or anything that contains a metallic component.

Seek shelter, quickly, don’t wait

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While some storms don't require a lot of prompting to get people to move to safety. It's the more subtle storms that are dangerously deceptive. Photo by Frank Ross

When you’re participating in outdoor sports, or working in your daily job, the critical thing to remember is when you hear thunder, you are already within the range of where the next ground flash may occur. Studies have concluded that there is no safe time between that first strike of lightning and the next, for seeking shelter. The timing for subsequent strikes can be minutes, seconds or fractions of seconds. This study determined that most of the intervals between lightning strikes, in an circle of 1,640 feet, the range varied from 0 to 600 seconds, and the maximum frequency was a scant 40 seconds.

While this may seem like a no-win situation, you can stack the deck in your favor. First and foremost, seek shelter when you hear even the faintest peel of thunder. The best options for shelter would include enclosed buildings or cars or enclosed vehicles. Just remember that when you’re in a vehicle, don’t touch metal surfaces. A vehicle may have rubber tires, but that is no guarantee against a close strike. If no safe shelter can be reached quickly, and the storm is closing fast, you want to minimize your profile as much as possible. Bend down into a crouching position and rise up on the balls of your feet to reduce the amount of contact with the ground as possible. If you feel the hair on the back of your neck or your arms stand up, the area you are in is building up for a strike.

Avoid isolated trees, and open structures such as telephone booths, gazebos or porches. These types of structures make poor lightning shelters. If you find yourself in the area of a tall object such as a power pole, antenna, or large tree, move as far away as possible. Such locations make you vulnerable to secondary discharges coming off those objects.

More to come . . .

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For what is basically a simple discharge of static electricity, the show can certainly be impressive. Photo provided by NOAA.

By Frank Ross

In the natural world around us, few events inspire the spontaneous reactions of awe and fear with the speed and universal impact as a single bolt of lightning. And well it should, for the numbers involved are as remarkable as the blinding flash of light and the window-rattling rumble of thunder that follows.

These dramatic flashes of light are basically the same type of event you may have experienced when you walk across a room in the winter and touch a door knob, receiving a shock of built-up static electricity. In much the same way, a charge of lightning builds up in the air, when moving particles become highly charged. Lightning is simply an atmospheric discharge of static electricity.

Simplifying the complex

That’s the simple explanation. The details of how this phenomenon occurs are another matter. There is currently no consensus among scientists on how lightening is initially formed and various theories populate the debate. Further, there are numerous different types of lightning, which only further muddies the waters of scientific understanding. Since the days of Benjamin Franklin’s foolhardy attempt to understand lightning, scientists have studied the root causes, producing theories that involve a wide range of suspected variables and contributing factors. These range from the impact of solar wind and the accumulation of charged solar particles to things that disturb or impact the atmosphere such as wind, humidity, friction, and atmospheric pressure. Ice that is contained inside a cloud is thought to be a key element in lightning development, and may cause a forcible separation of positive and negative charges within the cloud, thus assisting in the formation of lightning.  

Fires and side effects

Scientific studies and educated speculation aside, when an atmospheric electrical discharge occurs, a leader of a bolt of lightning can travel at speeds up to 130,000 miles per hour. That is so fast it is almost impossible to comprehend. When you consider the amount of electricity and heat contained in a single strike, it is easy to understand how homes and businesses can be damaged severely, even burnt to the ground.

Every summer wildfires in California and numerous places in our country become headline news as they rage out of control, gobbling up thousands of acres of land, homes and business in their path. Many of them are started by lightning, and it is easy to see why. A single bolt of lightning can generate temperatures in the range of roughly three times the heat on the surface of the sun.  With a direct strike to a home, you can imagine what this type of heat can do to dry lumber and roofing materials, but often the damage to a home is not a total loss of the structure, but an electrical gutting of your appliances and entertainment electronics equipment.

On average, a bolt of negative lightning will deliver an electric current of 30,000 amps. To put that in perspective, your home electrical panel might have a maximum capacity of 200-250 amps. And that’s an average bolt. Large bolts of lightning can deliver up to four times the jolt. Studies have revealed the voltage is directly proportional to the length of the bolt. For your stereo, telephone and other personal items, even a partial burst of that magnitude is fatal.

Lightning comes in both positive and negative polarity. The positive form of lightning is the rarest of these natural wonders. A positive strike is one that comes from what appears to be clear or only partially cloudy skies. It is this form of lightning that has become known as a “bolt from the blue” due to this curious strike that comes with no apparent warning.  

Personal impact

In this realm of potential danger, seemingly ever present in our daily lives, it is hard for the average person to comprehend and respond to this threat that has the potential to take from us our possessions, and indeed our very lives. In self-defense, we build up these barriers that keep the wolf at bay. Our life experience tells us that it’s the other person that gets struck, the person in the news whose home or business is destroyed; not ours.

Reality is that when you hear the first clap of thunder roll in the distance, you are in the arena of the next strike. Whether it strikes close, or impacts your life, is basically a roll of the dice. The one question we all have to ponder is when will the law of averages catch up with us? When will the many thousands of lightning bolts we’ve watched be the one that has our name or address tingling within its current? With approximately 16 million lightning storms a year, and many times that in terms of individual bolts of electricity, it is really amazing that more people aren’t impacted on a daily basis. Unfortunately, the sheer volume of lightning that we experience on a yearly basis is probably the most detrimental aspect of this natural phenomenon.

Don’t get lulled into a false sense of security. Learn how to protect yourself, the lives of your family, and your personal property. This is a challenge we all face uniformly, but it is those who face it will a firm grasp of the nature of lightning and knowledge of the technology available for protection are the ones who breathe easier when summer storms roll across the land.

Come back often as I explore both the nature of the danger and the solutions to safety and peace of mind.

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