On Sat, 10 Nov 2018 16:26:12 -0000, "Steven Watkins"
wrote:

On Sat, 10 Nov 2018 16:19:15 -0000, wrote:

On Sat, 10 Nov 2018 15:33:18 -0000, "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't be for safety - if you're in the shower and get a shock, if you've managed to get out to reach the switch, you've got away from it anyway.

Can't be to isolate to work on it, there's a fusebox for that.

Don't need to turn it off when you're finished showering, there's a switch on the shower itself.

What is "electric" in the shower in the first place?

The heating element, and in low water pressure areas, possibly a pump.

Strange. We just have central water heaters and pressurized plumbing.
The water heater is required to be bonded and there is enough metal
surface area to bond the water.
No switching devices or receptacles are allowed in the shower space
and any lights are required to be 8 feet up with a water resistant
"shower trim".