D player, telephone and set top box detroyed by lightning.
Those items were a best (and destructive) connection to earth. Next is to learn from that human mistake that made damage possible. What was the inco ming path? Where is a low impedance (ie less than 3 meter) connection from that conductor to single point earth ground? If it does not exist, that i s the human mistake that created damage. Did they find and correct their m istake?
Damage even to lightning conductors is, quite obviously, a human mistake. Direct lightning strikes without damage was routine even 100 years ago.
Best protection at an appliance is already inside that appliance. An elect rical current, when not all but invited inside by a human, does not overwhe lm superior protection inside TVs, DVDs, telephones, and set top boxes. Yo ur friend had damage because a best connection to earth was not outside - b efore that current could enter the building.
Lightning strikes do take out equipment - when well proven techniques are n ot implemented. Direct lightning strikes without damage are routine all ove r the world - using well proven techniques originally demonstrated by Frank lin in 1752. Protection has always been that simple. This proven reality exists when defamation is not needed to protect an ego.
DVD player, telephone and set top box detroyed by lightning.
Well most appliances should be earthed.
What was a human mistake ?
Apparently it came from the virgin media cable box outside in the street so meone saw the lightning hit it. It's thought that the lightning travels thr ough into teh cable box them through the HDMI lead to the TV then up . Yes up the ariel to the roof. The DVD waay pluuged into the TV via it's sca rt, the fuse in the DVD player had vaporised and the top of the plug blown off. The surge also went down a HDMI lead to an iMac computer which survived alt hough the bluetooth is no longer availbe as an option.
The central pin of the aerial lean waqs found embedded in the carpet about
4 ft in fromnt of the TV with a burn mark on the carpet.
Where is a low impedance (ie less than 3 meter) connection from that condu ctor to single point earth ground? If it does not exist, that is the human mistake that created damage. Did they find and correct their mistake?
No idea it was a mistake, virgin media replaced the box for free, the TV en gineer replaced the boards in their TV for free, and teh phone (landline) w hich was also taken out.
Why ?
yes of course it was same today somewhere.
An electrical current, when not all but invited inside by a human, does no t overwhelm superior protection inside TVs, DVDs, telephones, and set top b oxes. Your friend had damage because a best connection to earth was not ou tside - before that current could enter the building.
total crap you've no idea what you are talking about.
not implemented. Direct lightning strikes without damage are routine all o ver the world - using well proven techniques originally demonstrated by Fra nklin in 1752. Protection has always been that simple. This proven realit y exists when defamation is not needed to protect an ego.
Human mistakes are a common reason for appliance damage. You have demonstr ated that classic mistake. First, appliances are not earth grounded. Appl iances are safety grounded. A major difference was defined - and not compre hended.
Second, low impedance was stated repeatedly. Apparently that expression was repeatedly ignored. Low impedance is one of many reasons why that third (g round) prong in a receptacle cannot be earth ground. In the UK, many are f urther confused because that third prong is deceptively called earth.
Low impedance is impossible when a connection to the earthing electrode is too long (ie greater than 3 meters), when wire has sharp bends or splices, and numerous other considerations. An appliance is not earth grounded.
Third, if an appliance was earth grounded, then that is a best and even mor e destructive path to earth. Protection was never about earthing an applian ce. Protection is about earthing surge energy. Protection is about connec ting to earth BEFORE lightning enters a building.
Protection cannot exist after lightning enters a building or by earthing an appliance. Those are more examples of human mistakes - by denying rather than first learning what has been done for over 100 years.
Let's assume an incoming path was via the Virgin box and HDMI cable to a TV . Fine. That is the incoming path. It is called electricity. No current exists if an outgoing path also does not exist. What was the outgoing pat h? Every damaged item must have both an incoming and a completely different outgoing path to earth. Learning from the mistake is about identifying bo th paths. Only the naive assume a TV can be damage only by the incoming pa th.
Many forget what was even taught in primary school science. Electricity in coming without a different outgoing path means no electricity exists. What was a path to earth via each appliance? That means always remembering wha t was taught in primary school science.
Every example of surge damage is traceable to a human who all but invited t hat electricity inside. Protection is always about connecting to earth BEF ORE that electricity enters a building. If the Virgin cable did not connec t to a well defined earth ground, then damage is directly traceable to the human who failed to perform his job. What human made that dastardly mistak e - not earthing a Virgin cable where it enters.
Who is ultimately responsible for providing and maintaining earth ground? Homeowner. Why would a surge be all but invited inside? Which human did n ot confirm, demand, or inspect that earth ground? He is the reason for tha t lightning damage.
Best protection at an appliance is already inside that appliance. Denying it without any facts or numbers only confirms one wants to argue rather tha n learn. For example, protection on AC power cords was once well over 600 volts. Today that standard protection is closer to 1000 volts. Telephone equipment would typicaly withstand 600 volts without damage. In venues whe re surges are more frequent (ie Canada), effective protection is required t o be installed on all incoming phone lines - for free. So that robust prot ection inside all telephone appliance is not overwhelmed. All facts and nu mbers possible only from one who knows this stuff. Denying without facts an d numbers means one is reciting what is also known as 'brainwashing'.
Unfortunately the most common source of incoming surges (AC electric - both overhead and underground) is not required to have that protection. You ha ve described damage that is typical for a direct lightning strike when inco ming utility wires were not connected to proven protection. Again, damage because a human failed to earth inexpensive and effective protection.
Using a word 'crap' rather than discuss in electrical terms says to all tha t denials come from ignorance and emotion. You had damage because a surge was all but invited inside by a human who never learned what is necessary for effective protection. Often because a human wants to deny rather than learn proven solution from well over 100 years ago.
Protection is always about how that surge current connects low impedance to earth. Either hundreds of thousands of joules dissipate harmlessly outsid e. Or that current is all but invited to go hunting inside and destructive ly via appliances. To overwhelm superior protection inside appliances. Pro tection is never about safety ground. Protection has always been about wha t does the protection - single point earth ground. Uninformed denials use words such as 'crap'. Instead, learn why direct lightning strikes need not cause damage for about one quid per protected appliance. Your choice. Den y using emotion or learn using facts. That means one must ask to learn - n ot to argue with nasty overtones.
WFT.... How does it get in does it have a key or did you leave the window open.
or by earthing an appliance. Those are more examples of human mistakes - b y denying rather than first learning what has been done for over 100 years.
Earthing an appliance has nothing to do with protecting it from lightning.
from the virgin box outside in the street through the cable TV cable into t heset top box.
Fine. That is the incoming path. It is called electricity. No current exists if an outgoing path also does not exist.
but it does exist.
What was the outgoing path?
Most likely the aeriel.
outgoing path to earth. Learning from the mistake is about identifying bo th paths. Only the naive assume a TV can be damage only by the incoming pa th.
yes you don;t leave your TV aerial in when there's a storm. Some remove the phone too.
incoming without a different outgoing path means no electricity exists. Wh at was a path to earth via each appliance? That means always remembering w hat was taught in primary school science.
But there doesn't need to be if the air breaks down that's what lightning i s.
that electricity inside.
Total rubbish. Trees get hit by lightning and humans don;t always decide wh ere trees grow.
Protection is always about connecting to earth BEFORE that electricity en ters a building.
You don't know what you are talking about.
If the Virgin cable did not connect to a well defined earth ground, then d amage is directly traceable to the human who failed to perform his job. Wh at human made that dastardly mistake - not earthing a Virgin cable where it enters.
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