I presume the duty cycle is in the shower instruction manual.

The duty cycle almost certainly originates from the safety
certification of the shower. As part of the safety testing the
temperature of all the internal components and insulation is measured
and checked that it doesn't get too hot. most high power domestic
electrical equipment is operated on a duty cycle, this gets written
into the instruction manual and then the duty cycle is followed during
safety testing

the limiting temperature is the worst case component at the highest
ambient (air)operating that the shower is in - which will be warmer
than your typical bathroom temp

Unless you're running the shower for a very long time on a hot day I
wouldn't have thought you'd have a problem - other than electic showers
are usually crap :-)

Charlie


nonymouse wrote:
Having finally decided against the electric shower option and lined up
a nice power shower, I find that the duty cycle is only 15mins
on/45mins off. I don't understand too much about this but am i right
in thinking this means you can only use it for 15mins in an hour!!!

This is bloody ridiculous. By the time my wife is out of the shower,
I'll get about 5 seconds worth!!