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. Is the water coming out of the shower when unearthed not at about 120 volts (the average of the heating element voltage)? That would give you more than a tingle.