A Faraday cage works by three mechanisms: (1) the conductive layer reflects incoming fields, (2) the conductor absorbs incoming energy, and (3) the cage acts to create opposing fields. What you keep in your Faraday cage always are the spare electronic parts for your car or truck, your spare ham radio, your extra laptop computer, etc. If you have a set of 2 way radios that work ok in your area, and you are happy with them, then buy a second set and put them in the cage. I keep hand held wallis talkies for communication on the farm and with my neighbors Ina faraday box.
Instead of thinking of a faraday cage like you would an umbrella in a rainstorm, think of it instead like a sponge you are standing under.


That is perhaps the best analogy I can come up with for how a faraday cage is supposed to work. If the cage is made from something non-conductive, the free carriers are not mobile enough to realign and cancel the incident field. A steel trash can with a very tight fitting lid does a pretty good job of acting as a Faraday cage. A high altitude nuke EMP will generate upwards of 25,000 volts per meter within a close distance and 5000 volts per meter out to around 1500 miles from zero. It would be fine sitting inside a Faraday cage as long as you’re not scrubbing your bare electronics against it.


Check out disasterprepper videos (or my name) and you’ll find one on Faraday Cage testing. The bottom line is that an ungrounded cage protects the contents from harmful electromagnetic fields as well as a grounded one.



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