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Faraday Cage: Thickness of the conductor

  1. Mar 3, 2017 #1
    So i have learned about the ability of Faraday Cage for blocking an external electric field. But is the thickness of the conductor effect the ability? Is there any limit of its thickness so that the cage won't be able to block external electric field anymore? I have read and searched about this topic but i haven't found anything for this, mostly i found about Faraday Cage ability to block electromagnetic wave. Can anyone please help? Thank you
  2. jcsd
  3. Mar 4, 2017 #2
  4. Mar 6, 2017 #3


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    Gold Member

    A shielding enclosure needs to be a few skin depths in thickness at the required frequency and any holes in the cage need to be small compared with the wavelength. Even a narrow slit like a knife cut will allow waves to enter unhindered.
  5. Mar 12, 2017 #4
    I guess you are talking about blocking an electromagnetic wave, not electric field itself
  6. Mar 13, 2017 #5


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    A static electric field will be blocked by a continuous conductor of practically any thickness.
    But how that screen is constructed will depend to some extent on how much current will continue to flow through the screen.
    If there is any AC electric field component, then things get more difficult. That is because every electric field that changes will also have a changing magnetic field.
    You need to better describe the situation and environment if you want a better answer.
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