In uk.d-i-y, Andy Wade wrote:

"extraneous-exposed-conductive-part"

No such thing! There are extraneous-conductive-parts [1] and there are
exposed-conductive-parts [2]. These are different things, but the twain
_should_ meet in your bathroom, via ... (you know the rest).

[1] Non-electrical metalwork which may "introduce a potential,
generally earth..." - e.g. metal plumbing & waste pipes.

[2] Earthed metalwork of electrical appliances - e.g. wall heater,
electric towel rail.

Aye, I do know: and the mumpty that decided on the nomenclature, using
two such similar words, deserves to spend a few thousand years in
purgatory trapped in a late-1980s helpdesk dealing with Expanded vs
Extended memory (come on now! quickly! summarise the differences!) ;-)

Stefek