Invented by Michael Faraday in 1836 and developed further by Benjamin Franklin, the Faraday Cage is an enclosure that acts as a shield that blocks static and non-static electric fields, essentially preventing electric signals or waves from passing through. It protects different kinds of electronic equipment from electronic discharges. It is made up of materials like wire mesh, metal plates, and aluminum foil. The size of the Faraday Cage varies and depends on what it will be used for.

Everyday Uses & Applications for the Faraday Cage

The 2007 report conducted by the Bioinitiative Working Group, a collaboration of international scientists as well as public health experts from the United States, China, Australia, Sweden, and Denmark, have concluded that a constant exposure, even to the lowest level of radiation that cell phones emit have the tendency to impair the immune system and can help contribute to diseases such as heart disease, dementia, and Alzheimer’s disease.

So, the question now is, can we avoid the everyday exposure from EMR and EMF? Sad to say, we can’t. This is because in our society today, and with the great advancements in technology, EMF and EMR exposures are now part of our daily lives. But don’t fret. There is still a way in which we can control and manage EMR and EMF exposures. That is by using the FARADAY CAGE.

Here are just a few uses and applications of the Faraday Cage.

  • Elevators– Elevators can be considered as somewhat of a Faraday Cage. The metal of the elevator acts as a skin which creates what we call “dead zones” that block cell phone signals.
  • Microwave – The metal shell of the microwave oven functions as a Faraday Cage. It traps the microwave inside the oven which in turn is used for cooking.
  • MRI ( Magnetic Resonance Imaging) Scan Rooms – The MRI Scan Room is a very good example of a Faraday Cage. It prevents external radio frequencies from interfering with any data collected from the patient.
  • Linemen Protective Suits- The protective suits that linemen uses are also an example of a Faraday Cage. The suits protect the lineman from getting electrocuted.
  • Engineering– It is in the field of engineering where large versions of Faraday Cages are used. These large Faraday Cages are used in blocking outside interference most especially during sophisticated electronic device tests.
  • Spy Prevention– The best example of this was during the selection of a new pope at Vatican City in 2013. The Vatican used a Faraday Cage to shield the entire Sistine Chapel to block any electric spy devices that may have been secretly placed inside the chapel.

Other Important Uses of the Faraday Cage

  1. Prevents RFID Skimming– RFID skimming is a form of digital theft that enables information from RFID ( Radio Frequency Identification) based smart cards to be read and duplicated. In the case of a credit card, for example, all data from the credit card such as card number, cardholders name, and card expiry date can all be duplicated or stolen through RFID Skimming. Mobile devices such as smartphones and tablets are also susceptible to RFID Skimming. 
  2. Prevents Cell Phone Tracking-  Since all modern phones are equipped with a GPS chip, it is now very easy to track the location of the person using the device. When you place your phone in a faraday cage, you will also be blocking the cell signals that your phone is emitting. Meaning, the GPS ability of your phone will no longer function.
  3. Prepare for an EMP Attack- An EMP or Electromagnetic pulse attack is a short burst of electromagnetic energy that disrupts or damages electronic equipment. A wide-scale EMP attack can be created by detonating a nuclear weapon like a hydrogen bomb. As the initial energy from the nuclear blast is released, a large electromagnetic field in the form of a pulse will radiate outwards. This pulse will travel in a line of sight fashion and any electrical device in the path of the EMP attack will be destroyed. But don’t worry, a wide-scale EMP attack is unlikely to happen. Meanwhile, a small scale EMP attack is not dangerous to people but it will surely damage or destroy all electrical components that are not shielded or protected by an anti-EMP device.

An EMP attack can damage or destroy the following:

  • Power Grids
  • Laptops
  • iPad
  • Smart Phones
  • Cell Phone Towers
  • Telephones
  • Desktop Computers
  • Mainframe Computers
  • Routers
  • Automobile Engine Management Computers
  • Jet Aircraft Systems
  • Air Traffic Control Systems
  • Banking Systems
  • Hospital Diagnostic Machines
  • Televisions
  • Internet Servers
  • Refrigerators
  • Thermostats
  • and anything else with a microchip

4. Help keep electronic devices safe in case of a Massive Solar Flare – A solar flare is an explosion on the surface of the sun that can produce electromagnetic radiation bursts. By keeping your electronic devices in a faraday cage, you can make sure that in case of a massive solar flare, all of your electronic devices inside the faraday cage are protected and safe.

D.I.Y.: Build A Simple Faraday Cage

There are plenty of different designs of Faraday Cages that you can do. Here is a simple do it yourself Faraday Cage that you can do to make sure your electronic gadgets are protected from Electro-Magnetic Pulse (EMP).


  • 2 Cardboard Boxes that fits together
  • Aluminum foil
  • 10mm black polyethylene sheeting
  • Grounding wire
  • Alligator Clip
  • Cellophane tape


  • Put the smaller cardboard box inside the bigger box.
  • Use the aluminum foil to cover the external box completely.
  • Using the cellophane tape, attach the grounding wire to the aluminum foil.
  • Attach the crocodile clip at the end of the grounding wire.
  • Use the polyethylene sheeting to wrap the covered box.
  • To prevent the foil from ripping apart, use tape.
  • DONE!

You can now place your electronic devices inside your Faraday Cage.