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How to Ground a Faraday Cage

A Faraday cage is an enclosure made of solid metal or a wire mesh. Its purpose is to isolate the inside space of the cage from electrical and magnetic energy outside the cage. Such cages are frequently used to protect devices from external electric and magnetic fields. The cage does not allow the electric and magnetic waves to pass through it. But the energy of these waves is absorbed by the cage, which can increase its voltage level to very high values. The Faraday cages are therefore grounded to redirect the absorbed energy to ground.

Things You'll Need

  • Thick copper braid
  • Soldering iron
  • Solder wire
  • Screwdriver
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Instructions

    • 1

      Turn the soldering iron on and set it at a temperature of 400 degrees Fahrenheit.

    • 2

      Place the Faraday cage on a flat and dry surface.

    • 3

      Hold the solder wire on a side of the Faraday cage's outer surface and gently press it with the tip of the soldering iron. Keep the soldering iron and the solder wire there until some solder has been absorbed by the surface and a solder blob has accumulated. Retract the solder wire and place the soldering iron tip back in its holder.

    • 4

      Place the copper braid on a flat and dry surface. Hold solder wire at the end of the braid and gently press it with the tip of the soldering iron. The solder will melt and get absorbed by the braid. As soon as the end of the braid is covered with the solder, retract the solder wire and place the soldering iron tip back in its holder.

    • 5

      Hold the copper braid's soldered tip against the solder blob on the surface of the Faraday cage. Press the braid gently with the tip of the soldering iron. It may take up to 10 seconds for the solder on the braid and the surface to melt and merge together. Retract the soldering iron tip but keep on holding the copper braid until the solder has solidified.

    • 6

      Identify nearby electrical equipment that is connected to the power outlet through a three-pin connector. This could, for example, be a washing machine or a computer. The availability of a third pin ensures that the device is properly grounded. Look for any mounting screw on the back of the device that is connected to its metallic enclosure. Unscrew it using a screwdriver. Place the other end of the copper braid on top of the hole and insert the screw back into the hole. Tighten the screw with the screwdriver.


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