Author Topic: Faraday cage  (Read 1019 times)

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Offline geezerbiker

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Faraday cage
« on: September 24, 2020, 09:28:45 PM »
I suppose I worry about strange stuff all too often but one of my concerns is if we ever have an EMP or another Carrington event.  So I've been wondering if something like a conex box (steel shipping container) would act as a Faraday cage.  The conex box I have is all steel everywhere but the bottom has a wood floor. 

I know the odds of needing such a thing is very low but I'm wondering if the conex box would work as is or if I would have to add a screen metal mesh to the flooring...  Any one here have knowledge of such things? 

The idea is to store things in the box like a radio, an old computer and the electrical parts needed to get my truck up and going after such an event. Right now the box is full of old motorcycles and related junk but along the way we're talking about turning it into a work shop but one end or corner should be sufficient for emergency electronics.

Tony

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Re: Faraday cage
« Reply #1 on: September 24, 2020, 11:04:38 PM »
If your connex is like mine (like all others), the wood floor is a smooth working surface ABOVE the metal container's corrugated steel floor.  A connex box is ALL STEEL on six sides (typically one end being a double door), water resistant, vented, and they float when slipped overboard by some rouge wave or shipwreck.  I think your connex IS a Faraday Cage and suitable for electronics without additional shielding.

Offline ironglows

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Re: Faraday cage
« Reply #2 on: September 25, 2020, 02:50:45 AM »
The shipping container idea is good, because you could store youe ATVin it , and thereby have transportation.
  http://survive2012.com/news/2013/01/shipping-containers-as-faraday-cages-4744.html

  Get more info by Googling...>will a steel shipping container make a faraday cage<
"They have the guns and therefore we are for peace and for reformation through the ballot. When we have the guns, then it will be through the bullet"      (Saul Alinsky) ...hero of the left..

Offline JustaShooter

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Re: Faraday cage
« Reply #3 on: September 25, 2020, 02:31:05 PM »
I suspect it needs to be properly grounded to provide the protection you desire...
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Offline ironglows

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Re: Faraday cage
« Reply #4 on: September 25, 2020, 02:35:57 PM »
 Yes!  From the article, and others I found, adequate grounding is apparently paramount !
"They have the guns and therefore we are for peace and for reformation through the ballot. When we have the guns, then it will be through the bullet"      (Saul Alinsky) ...hero of the left..

Offline geezerbiker

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Re: Faraday cage
« Reply #5 on: September 25, 2020, 07:41:02 PM »
The plan is to get a quad after I sell all my street bikes so it would be kept in there as well as the a previously mentioned supplies.  One end sits on the ground so it's grounded.  My lot slopes and we had to raise up the back end about 3 feet to make it level. 

At the moment there's a 1966 Baja Bug in the back and 5 bikes and a bunch of parts that I all planned to sell this year before everything went to sh*t.

Anyway thanks guys for the input...

Tony

Offline JustaShooter

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Re: Faraday cage
« Reply #6 on: September 26, 2020, 01:30:07 AM »
One end sits on the ground so it's grounded.  My lot slopes and we had to raise up the back end about 3 feet to make it level. 

I'm afraid that really isn't enough to provide good grounding - especially in dry weather.  You probably need something more like what they use for a house or building ground - 1/2" copper rod driven deep into the ground (how deep depends on your area, but generally an 8' rod is sufficient)  and attached with a heavy gauge copper wire (#6 or #8 typically).
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Anything I post in these forums is my personal opinion formed by my own interpretation of the topic.
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Offline Bob Riebe

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Re: Faraday cage
« Reply #7 on: September 28, 2020, 03:10:57 PM »
It all depends on the strength of the EMP.

Offline geezerbiker

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Re: Faraday cage
« Reply #8 on: September 29, 2020, 05:12:33 PM »
I'm hoping for no EMP but I'm still planning to go ahead and ground it anyway.  A lighting strike is more likely than an EMP and it wouldn't hurt to have it grounded anyway.  About 6 years ago a house about 200 yards away was struck by lighting.  It's a rare occurrence around here but it does happen from time to time.

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Re: Faraday cage
« Reply #9 on: September 30, 2020, 02:03:59 AM »
Happens here, E. Central Florida, Lightning Capital of the World, all the time.  I asked a Residential Contractor building a Custom Home, why there were no lightning rods, down comer cables, and grounding grid on residences?  His answer was the cost was prohibitive when measured against the low probability of a direct hit to any residence and why invite a strike by giving the ground the ability to reverse the charge to the sky.  Lightning goes both ways - sky to ground and ground to sky, meeting somewhere along that path, and far too fast for the naked eye to see.  We do see a house on fire in the news here "more often than infrequently", though random of course, widely random. 

Trees and the tallest point on a structure get hit.  Electricity rides on the surface and skyward pointed elements  concentrate that charge.  Folks get hit in boats on the ocean, walking on the beach, playing golf, because they are the "tallest" point in the charge mass from ground to sky.  If your Connex is under the 45-degree "cone umbrella" of tall trees or near your house, barn, or other taller structure, I suspect you are already protected from a direct strike.

Offline Argent 88

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Re: Faraday cage
« Reply #10 on: September 30, 2020, 07:59:36 AM »
We were hit by lightning and it blew out ever single light bulb in the house. I think it came in on the neutral.

Offline Lloyd Smale

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Re: Faraday cage
« Reply #11 on: September 30, 2020, 11:32:44 PM »
if we had an emp wouldnt radio stations and the internet and even the electrical generation be gone. dont know how much use a radio and a computer would be. Probably better off buying back up computer and sensors for your car or truck and putting then in the box. Or spending the time building loading more ammo for when it happens.
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Offline pastorp

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Re: Faraday cage
« Reply #12 on: October 01, 2020, 02:45:07 AM »
At most of us age, I’d be more concerned with how I’ll get my meds than spare parts for my truck. After all, you run out of meds and a lot of us are dead in a few months.
Byron

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Re: Faraday cage
« Reply #13 on: October 01, 2020, 03:33:25 AM »
Or so the Pill Pushers of Big Pharma would have us believe pastorp.  Perhaps we would continue on a graceful decline toward Life Eternal rather than staying a "captured spirit" of popping pills.  IDK...ymmv.

Offline pastorp

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Re: Faraday cage
« Reply #14 on: October 06, 2020, 04:15:15 AM »
Or so the Pill Pushers of Big Pharma would have us believe pastorp.  Perhaps we would continue on a graceful decline toward Life Eternal rather than staying a "captured spirit" of popping pills.  IDK...ymmv.


Do you believe this applies to insulin for a diabetic?
Byron

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