Brian Gaff (Sofa 2) wrote:

But hang on a moment, many devices have mains filters that as a transient
would fail those tests, as they have capacitors in them which have to
presumably charge and discharge on each cycle of the mains.
Brian

This is best analysed as an AC current (sic) rather than as transients,
and must meet the limits set. Hence filter capacitors to earth have to
have a lower value than capacitors across live and neutral, which latter
don't contribute to earth leakage.

--

Roger Hayter