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Appliance classes
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==Class IIFE== [https://patta.co.uk/wp-content/uploads/2020/09/Class-2-FE-symbol.png] These devices have a Functional Earth "FE". This differs from a protective earth ground in that it does not offer shock protection from a hazardous voltage. However, it does help to mitigate electromagnetic noise or EMI. This is often important in Audio and Medical design. Note as they also include double insulation it means that users will not be able to come into contact with any live parts.
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