Quote:
Originally Posted by McMurdo
Filtering on the appliance under test may otherwise cause parts in it to acquire a high floating voltage by referencing it to mains earth.
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I was just planning on connecting the mains incoming earth to the chassis/transformer and to the socket earth. Not sure I understand how that is any different to earthing via plugging the appliance into the mains directly?
The intended usage is mainly for live chassis work which would not use the earth pin, but also for small switch mode power supply testing. In the latter case there is access to the transformer output (and socket L/N) to allow a current probe and high voltage differential probe, so the input power can be monitored via a scope.