Understanding the Faraday cage Pros and Cons


The modern day over reliance on electronics means, virtually everything we use is electronically powered. Such electronic devices have made our everyday lives much comfortable, luxurious and made work easy. However, such electronics are susceptible to destruction from EMP attacks. Faraday cage therefore comes in to protect electronics and generally any item that has electronics in them from destruction by the electromagnetic pulse (EMP). A Faraday cage is a sealed enclosure that comes in various shapes such as a box, cylinder or a sphere that is covered with a conductive material such as silver or aluminum foil.


Such items would include radios, microwaves, fringes, rechargeable toothbrushes and shavers, USB devices, smart phones and tablets, laptop computers and many more. Although EMP might not necessarily destroy such items, it is not prudent to take chances. You might wonder what the rationale for using an electric conductor in Faraday cage is. The rationale is that Michael Faraday, its investor discovered that when an electrical conductor is charged, it exhibits charge only on its outside. It therefore has no any destructive effects on the contents in the interior whatsoever. The net effect, is simple, it creates a neutral environment for the electronic contents.


If you deem a certain electronic important to you, the prudent thing is to have it protected. Faraday cage protects the contents from statistic electrical field such as an electron or proton. Though we not know, electromagnetic radiation is everywhere around us, from cell phone signals to radio waves. In the era of 3G and 4G networks, mobile signals are suspected to becoming to be more destructive.


Faraday cages are quite distinct with some being very large ones such as those used in hospitals and government institutions. However, you do not need to have that big Faraday cage that costs a lot to be able to secure your electronics. You can build your own Faraday cage for home use or even your small company use using readily available home products. The critical point to remember is that some materials are better conductors than others and the better the conductor, the effectiveness of the Faraday cage. Therefore, go for materials that are good conductors.


Having a Faraday cage is quite beneficial. The first pro is that it protects all your electronic contents from EMP and other excessive field levels. This is because the conductor material in the outer surface aligns itself to cancel EMP and other external fields. When an EMP attack occurs, it destroys or disables any unprotected electronic thereof. This is important because you do not want to wake up one day and find your precious electronic toys destroyed and all your vital data lost.


Having a Faraday cage for your company is a prudent protective measure of your expensive electronics and most importantly your data. When such electronics are destroyed or disabled, the company is running the risk of losing vital data that is unrecoverable. In fact, shutdown of electronics by EMP is so rapid that the computer does not leave any information behind.


One known con of Faraday cage is that its efficiency is dependent on so many factors. These factors include how a good conductor the material is and how thick it is. The higher the EMP frequencies the thicker the Faraday cage ought to be. Knowing precisely what your EMP frequencies are is also a challenge by itself.


Finally, when selecting what items to put in the Faraday cage, give priority to those items you consider critical for survival such as medical equipment. Next in priority would be maybe your communication gadgets.

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