Richard Conway wrote:

The packaging the bath came in had several largely printed warnings that
it must be earthed.

Two points: Firstly the rules regarding bonding of baths (and metal
shower trays) have changed. The 16th edition used to list them as
something requiring bonding (this I expect was actually in error since a
bath, can't bring a potential into a zone). The 17th edition has removed
this anomaly.

Secondly, the requirement that existed previously was for supplementary
equipotential bonding and NOT earthing[1].

So the instructions from the bath manufacturer are not only out of date
but at best were sloppily worded.


[1] The purposes of which, and the function of each are different:

http://wiki.diyfaq.org.uk/index.php?...ng_and_Bonding

--
Cheers,

John.

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