Building A Faraday Cage

Last updated on August 24th, 2015


A protective measure to protect electronic devices from the effects of EMP include the Faraday cage.

(Update) The effectiveness of protection depends on several complicated factors including strength of EMP, your geo location from it, EMP altitude, and the gauge and type of metal you are using, and more… Suffice it to say that any makeshift Faraday Cage is better protection than none.

Build a simple Faraday cage from a small metal garbage can and lid.

The lid must fit snugly over the can. If the lid does not make good metal-to-metal contact, the open area could allow EMP to damage your equipment.

To further protect your equipment, purchase a metal screen about 6 inches wide and as long as the circumference of the can. Fold the metal screen in half, length wise, and then place it around (and fold over) the lip of the garbage can. The lid should then fit snugly against the screen and can, protecting all equipment contained inside the can.

Any metal can act as a Faraday cage. Even an ammo can. However, good metal-to-metal contact is imperative.

Remove all gasket material from the lid. If the can has been painted, make sure to remove the painted area around the lid where it contacts with the can itself (and the inside of the lid) with sand paper, so as to make good metal-to-metal contact.


An electromagnetic pulse (EMP) attack on the American homeland is one of only a few ways that the United States could be defeated by its enemies — terrorist or otherwise. And it is probably the easiest. A single Scud missile, carrying a single capable nuclear weapon, detonated at the appropriate altitude, would interact with the Earth’s atmosphere, producing an electromagnetic pulse radiating down to the surface at the speed of light. Depending on the location and size of the blast, the effect would be to knock out already stressed power grids and other electrical systems across much or even all of the continental United States, for months if not years.

Having said that, it may be prudent to protect some electronic items that may be useful post-collapse. Portable AM/Shortwave Radios. 2-way communication radios. Portable solar battery charger. The list can be as long as your imagination…


  1. Christine 11/03/2012
  2. George from CDA 11/03/2012
    • Ken (Modern Survival Blog) 11/03/2012
  3. JV 11/03/2012
    • Ken (Modern Survival Blog) 11/03/2012
  4. mark 11/03/2012
    • Ken (Modern Survival Blog) 11/03/2012
  5. Anonymous 11/03/2012
    • Ken (Modern Survival Blog) 11/03/2012
  6. marta t 11/04/2012
    • Ken (Modern Survival Blog) 11/04/2012
      • stcroix 11/04/2012
        • Ken (Modern Survival Blog) 11/04/2012
    • Russ W 09/10/2016
  7. G 11/04/2012
    • Ken (Modern Survival Blog) 11/04/2012
  8. rassd71 11/04/2012
    • Ken (Modern Survival Blog) 11/04/2012
  9. chiller 11/05/2012
  10. Bullneddle 12/17/2012
    • Ken (MSB) 12/18/2012
  11. anonymous 12/19/2012
  12. Mary Pevehouse 04/28/2013
    • Christy Buckles 06/15/2016
  13. Patriot1 07/03/2013
    • Ken Jorgustin 07/03/2013
  14. Pat Patterson 02/04/2014
  15. JJ 02/23/2014
  16. rwa grass valley 06/20/2014
  17. ali 07/02/2014
    • DaveM 07/02/2014
  18. if the lid doesnt seal try this 01/27/2015
  19. Large metal tool box 04/06/2015
  20. Suzanne 09/03/2015
  21. icecathook 12/08/2015
  22. bill 03/30/2016
    • NRP 03/30/2016
  23. GRC 09/10/2016
    • Just Sayin' 08/25/2017
  24. Robert 08/25/2017
    • Jon 08/25/2017

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