You could always join these loonies: http://www.spellingsociety.org/Ah yes! Silly me (or is it the inconsistent English language which is silly ? ).
You did, and he did (albeit pointing out that the conductivity of water is pretty low). However, maybe I should have been more explicit, since you seem to have missed my point ...In my first post I suggested that live current is being conducted through the water and ban-all-sheds seems to concur with me.
... on the assumption that there is some earthed metal pipework, tanks or whatever somewhere in your plumbing system, why do you entertain the possibility that you got a shock due to conduction of electricity (from wherever) through the water, yet don't see how an earth problem, which could result in the 'earth' rising to a high voltage, could also result in electricity being conducted to the shower hose/head through the water?
Fair enough, but you've changed the argument (you're not a politician, are you? )! I responded to your saying that you couldn't seen how an earth problem could be responsible "because the shower hose contects to a plastic thread", not "because you weren't getting shocks from other parts of the plumbing system".Because if that were the case, then rather then getting shocks only through the shower hose and head, we would be getting much stronger ones whenever we directly touch other taps and earthed appliances.
I don't see how the main earth connection would have a bearing on anything; the shower hose and head are not intended to be earthed as the shower hose connects to a plastic thread.
Indeed, and that's the other part of the OP's situation which hasn't been explored - i.e. what is his second point of contact, and how does it come to be at a different potential from the water within the peipework (since that is what seems to be being postulated)? ...For an electric shock there has to be two points of contact and they have to be at different potentials.
This is why I've asked the OP whether his plumbing installation is primarily copper. If it is, then it is very probable that at least the feed pipe to the pump will be connected, one way or another, to earth. Were that the case, I don't really understand how the water within the pump, and adjacent pipework, could be at a significantly different potential from earth, whether due to a fault or capacitive coupling - the earthed pipework would keep it close to earth potential and if the resultant current was high enough, the RCD would operate.So there is a potential ( voltage ) difference between the feet in the bath and the hose you are holding for you to feel a shock. ... As it is a power shower then the potential on the water is coming from the pump, by capacitive coupling if there is no metal in contact with the water ( plastic chamber and impeller ). It may be the earth to the motor frame has become dis-connected due to vibration.
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