"Steven Watkins" wrote in message
news
On Sat, 10 Nov 2018 20:35:25 -0000, Rod Speed
wrote:



wrote in message
...
On Saturday, November 10, 2018 at 10:33:19 AM UTC-5, Steven Watkins
wrote:
Why do houses have a switch to turn the shower off, either a cord on
the
ceiling or a switch in the hall?

Can you please describe the situation more fully. Does this switch turn
off
the water, or does it turn off electricity (such as for a light in the
shower compartment)?

It turns off the electrical heating of the water in the shower.

Some not in england go even further
https://www.youtube.com/watch?v=cNjA0aee07k

I can't understand how that can work with no earth.

Basically there is far less water between the active
and neutral than between the active and any earth
that the person in the shower can be in contact
with even with metal water supply pipes and taps.

Is the water coming out of the shower when unearthed not at about 120
volts

Nope, most of europe and china are 240V

(the average of the heating element voltage)?

There is no heating element. The
current flows thru the water itself.

That would give you more than a tingle.

In fact it doesn't.

But there is a reason that wimps call them suicide showers.