Originally Posted by ShoreFun
The microwave oven
is a Faraday cage. How do you think it keeps the microwave energy inside so you dont cook?
The cage does not need to be grounded. The purpose is to allow the current
to flow around the objects. Take an airplane as an example. They get hit by lightning
all the time. The electricity just flows around the fuselage and they are not connected to any ground.
I would guess that even a metal mesh fruit holder that keeps bugs out would work
So long as there is a path for some very high voltage and somewhat low current
electricity to flow around the items you want to protect.
That being said. Lightning is a funny
animal. Even a 'close' strike can set up a large voltage difference across a chip. This causes some erosion on the tiny wires in the chips and may contribute to a failure a week later. That happened to a TV. I saw the strike about 75 feet away and like 5 days later I went to turn on the TV and it did not turn on anymore.
If you enough voltage and amps, you can get a pretty serious static charge through the air. Something I learned one summer working for a power company, when I picked up a dead power line laying on the ground, that we were going to put up later, under some 750 kv transmission
lines, on a humid day, and got the pee shocked out of me! The linemen all got a good laugh as they knew it was going to happen.
We were working around some pretty serious voltage, and the motto there was, "everything is a conductor if enough volts and amps are applied."