[Bob Ireland]

***“That is also why the inside must be lined with something non-conductive. If the contents inside are in contact with the metal walls they are subject to the EMP.”
No, that’s not correct. The metal container acts as a Faraday cage which do not allow the electromagnetic pulse radiated signal to penetrate. What is important is that it is a good conductor (like aluminum) and that there are no openings or gaps which can act as slot antennas and allow EMP penetration ... ... A Faraday cage works like the roof on your house, it’s the outside that keeps rain from coming in, not your interior ceiling. Electromagnetic radiation cannot penetrate the metal shield, this is just basic electronic physics, nothing I need to argue with anyone about.***

Here is an article by Jerry Emanuelson, B.S.E.E: Getting Prepared for an Electromagnetic Pulse Attack or Severe Solar Storm

A locking-lid galvanized metal trash can, though, can be a very effective electromagnetic shield. Although it can be very effective, it is less than perfect, so the interior of the body of the galvanized metal trash can should be lined with some material to electrically insulate items stored inside the container from the metal exterior. (Cardboard probably works better than any other inexpensive material for this. Liners such as plastic trash bags may be too thin for this because of the momentary high voltages that could be induced on the exterior of an imperfect faraday cage during an actual EMP.) . . . (contact) may simply conduct the EMP energy into the (protected) device more effectively.

This is a page about some of the things that individuals can do to prepare for an electromagnetic pulse attack. I'm an electronics engineer who has been thinking about the EMP problem for more than 3 decades.

That is the easiest engineering text that I could find this morning. The subject of grounding is not dealt with in this posting, although it is mentioned elsewhere that the metal can could be at least partially buried in order to effect a good grounding. A good ground would make the metal skin less apt to become conductive.

[TheDog]

If I keep my phone in the microwave I won’t be able to follow the Q thread. Ain’t enough room in there for both of us.

[smileyface]

I tried using a can. Lined the lid with that metallic-like —maybe mylar— tape. I could not get the can to pass my empiric test. Perhaps I need to line the rim with Al+++ foil.