:: I would think that NATURAL is simply a mis-hearing of NEUTRAL.

That never crossed my mind, but now you mention it....


:: As for the "washtub with plunger" do you mean a symbol like this:
:: [-

Yes except the 'plunger' has a bar going top to bottom of the page, 
and the 'sides' of the 'bin' are higher so that the 'plunger' is about 
a quarter way inside the receptacle.

In fact I've just realised where I've seen something similar before, 
on electrical drawings showing connections and contactor type 
switches.

Colin
--
cdb, colin@btech-online.co.uk on 17/09/2009
 
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