Lightning protection.

How do I know if my computer is protected if it's plugged in during a lightning storm?

Do I have to worry about damage to the computer? Or to myself?

HP Notebook 2000.
 
Most power surges will go right through a surge protector. Best thing to do if you are experiencing lightning is unplug your laptop and just use battery.
 
Only thing that will stop lightning from entering your electrical wiring is a lightning arrester. Here's what they look like and you need an electrician to install it. http://www.deltala.com/prod01.htm

They can be found on ebay.


Now watch Westom and -Bud comment. They are all over the net about surge protectors and crap.
 
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How do I know if my computer is protected if it's plugged in during a lightning storm?
Protectors that most recommend (ie APC, Tripplite, Panamax, Belkin) do not claim to protect from typically destructive surges. Each must somehow block or absorb surges. No protector does or can do that for destructive surges.

Your telco's $multi-million switchng computer connects all over town. Suffers about 100 surges with each storm. How often is your town without phone service for four days after a thunderstorm while they replace that computer? Never? Telcos don't use surge protectors that are ineffective. They use something completely different; unfortunately also called surge protection.

When permitted inside a house (by a home owner), then a surge current hunts for earth ground destructively via appliances. Protection even 100 years ago was this simple. Connect to earth BEFORE it can enter a structure. Then it need not go hunting destructive via appliances.

That Delta is one example. But again, no protector does the protection. Protection means a homeowner knows where hundreds of thousands of joules harmlessly dissipate. That is by what does the protection - single point earth ground (all four words have electrical significance).

Best protection is a hardwire from every incoiming utility wire, low impedance (ie 'less than 10 feet'), to earth. But some wires (ie all phone wires, most AC wires) cannot connect directly to earth. So we do a next best thing. Use a 'whole house' protector to do what a hardwire would do better.

If properly connected to an upgraded single point earth ground, then appliances have protection similar to what telcos use to protect their most expensive equipment. What munitions dumps use to avert explosions. What broadcasting stations use to have direct lightning strikes and remain on the air. For homeowners, this superior solution costs about $1 per protected appliance.

Lightning may be 20,000 amps. So a minimal 'whole house' protector is 50,000 amps. Lightning must not even damage a protector (or a hardwire connected to earth). Sufficiently sized 'whole house' protectors come from more responsible companies such as Cutler-Hammer, General Electric, Ditek, ABB, Polyphaser, Siemens, Syscom, Intermatic, Leviton, and Square D to name but a few.

Power strips and adjacent UPSes cannot do and do not claim to protect from typically destructive surges such as lightning. Most recommend those ineffective devices due to an education from hearsay and advertising. Therefore naively claim nothing can protect from lightning.

Ineffective protector absorbs how many joules? Hundreds or a thousand? Effective protection means hundreds of thousands of joules harmlessly dissipate outside the building. Disconnecting (unplugging) is a least reliable solution. This other and superior solution has been proven by over 100 years of science and experience. But again, a protector is only as effective as its earth ground.
 
OP, please disregard westcom, this is his pet topic, and he has been proven over and over again to be wrong.
 
I have the biggest Belkin available and it has handled almost 15 years of Ohio Storms, and before that we lived near the oceans where heavy surges were normal. I think it's a 1990's SurgeMaster series. It's a BEAST!
 
Your Belkin and mine is for surge mostly. Loose power and go back on line. Not a lightening bolt with a million volts. Its lights out. It can destroy everything plugged into the house. Fridge, stereo's, tv and everything else.
 
to westom.nice try.tell me,what would the guage be on the ground wire that could handle a surge like a bolt of lightning??i have news for you,household appliances have been destroyed by lightning with or without the "hundred years fix"and the only reliable prevention of said damage is to unplug all electrical appliances.that having been said,ive been guilty of surfing while an electrical storm was in progress.i chalk that up to "dumb luck".
 
... tell me,what would the guage be on the ground wire that could handle a surge like a bolt of lightning??
16 AWG (1.3 mm) (lamp cord wire) will conduct a surge of less than 60,000 amps. As noted in a technical article in Electrical Engineering Times by George Kauffman in October 2007.

'Whole house' protectors rated for 50,000 amps (from other companies with superior integrity such as GE, Square D, ABB, Siemens, Polyphaser, Leviton, Intermatic, Cutler-Hammer, etc) typically earth using a 12 AWG (2 mm) wire. 12 AWG is more than sufficient for a 50,000 amp surge. Responsible manufacturers do not undersized their ground wire for 50,000 amps.

To be more than sufficient and to also meet human safety codes, an earth ground wire is typically 6 AWG (4 mm) bare copper. Even some radio antenna towers that suffer direct strikes use 6 AWG grounding wires. A wire sufficient for maybe 200,000 amp surges.


From disparaging tones, a few will immediately post denial and mockery. Rather than learn (or ask) why a 10 amp lamp cord wire can also conduct 50,000 amp surges without failure. Only the informed can provide these numbers.

Destructive surges might exist once every seven years. A number that can vary significantly even in a same Ohio town. Fifteen years without a serious surge might be normal in some venues. However tinier surges, too small to harm appliances, could have degraded that Belkin into ineffective.

A near zero Belkin (maybe a thousands joules) may have failed without any indication by its lights. Indicator lights can only report a type of (catastrophic) failure that must never happen to any protector. Belkin sort of forgets to mention that. Catastropic failure was when a protector was grossly undersized. Its indicator light can only report catastrophic (unacceptable) failures. And not a failure due to degradation.

For all we know, a Belkin in Ohio completely degraded early in its 15 years. Fortunately appliances already contain robust protection. What protects bathroom GFCIs, clocks, dishwasher, furnace, stove ...?

Some grossly undersized and adjacent protectors were discovered so prone to fire that the new owners announced those protectors must be removed immediately. Just another reason why adjacent protectors need protection only possible with an earthed 'whole house' protector. If its indicator light reported a failure, then you know that protector was grossly undersized. Be concerned. Only a thermal fuse averted fire.

Earthing direct lightning strikes is accomplished with a low impedance 6 AWG ground wire. That means a wire without splices, must be separated from other non-grounding wires, is not inside metallic conduit, has no sharp bends, and must be as short as possible - ie less than 10 feet. All concepts that engineers who do this stuff would know. But not discussed when a protector has no earthing - ie a Belkin.

That Belkin (with near zero protection numbers) does not claim to protect from destructive types of surges - lightning being one example. BTW, the many types of destructive surges occur long before anyone even thinks about unplugging. Humans have no idea when a stray car, lineman error, or gnawing squirrel causes a potentially destructive surge.

I routinely use electronic equipment during all storms. How often does your telco disconnect all phone service with each approachnig thunderstorm? Never. They only use proven solutions - which means not unplugging.

OP should inspect his home for above solutons. Earth the surge; not a computer. Above discusses a 'secondary' protection layer. Also necessary is to inspect your 'primary' surge protection layer. We did this stuff. Pleny more to discuss.
 
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So there is nothing built into my laptop alraedy? I need to buy something new to plug into the wall outlet?
Somethings that most recommended and that plug into a wall outlet are ineffective.
Protectors that most recommend (ie APC, Tripplite, Panamax, Belkin) do not claim to protect from typically destructive surges. Each must somehow block or absorb surges. No protector does or can do that for destructive surges.

Power strips and adjacent UPSes cannot do and do not claim to protect from typically destructive surges such as lightning. Most recommend those ineffective devices due to an education from hearsay and advertising.


All appliances contain robust protection. What some call a surge is usually only noise due to existing internal protection. Superior protection already exists in bathroom GFCIs, clocks, refrigerator, door bell, furnace, radios, printers, CFL bulbs, dish washer, modems, and your laptop. Your concern is a rare transient, maybe once every seven years, that may overwhelm that protection. (Can you unplug all them within microseconds?)


That Delta is one example. But again, no protector does the protection. Protection means a homeowner knows where hundreds of thousands of joules harmlessly dissipate. ...

Best protection is a hardwire from every incoming utility wire, low impedance (ie 'less than 10 feet'), to earth. But some wires (ie all phone wires, most AC wires) cannot connect directly to earth. So we do a next best thing. Use a 'whole house' protector to do what a hardwire would do better.

But again, a protector is only as effective as its earth ground.

Something, adjacent to a computer and with no earth ground [ie Belkin], will not discuss earthing. Delta was one example of a properly earthed protector. Other more responsible companies also provide these effective solutions including Siemens, ABB, Square D, Polyphaser, Keison, Intermatic, Ditek, GE, Syscom, Clipsal, Novaris, and Leviton. Companies who also make other electrically safe equipment for your house. A Cutler-Hammer 'whole house' protector is sold in Lowes and Home Depot. When properly sized (ie 50,000 amps) and earthed, then protection exists for all types of surges; even for direct lightning strikes on incoming utility wires. Then a surge does not overwhelm protection already inside your laptop.

As noted previously, a protector that does effective protection must connect low impedance (ie 'less than 10 feet') to single point earth ground. A protector is only as effective as protection it connect to - earth ground.
 
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