Author Topic: Sewer vs signal ground question  (Read 920 times)

Rob Strand

Re: Sewer vs signal ground question
« Reply #20 on: March 14, 2021, 08:22:43 AM »
Quote
Can the currents in the enclosure in turn induce Eddy currents in the enclosed circuit?
The eddy currents arrange themselves so as to counteract the external field so they always act to reduce the field at the enclosure surface.   That doesn't mean it blocks the 100% field.    How much field gets through depends on the skin depth, the frequency and the thickness of the enclosure.   50Hz needs 10's of mm of copper.

Eddy shielding is completely different magnetic shield using iron or mu-metal.
« Last Edit: March 14, 2021, 08:38:37 AM by Rob Strand »
The internet:  answers without the need for understanding.