Assuming we're talking about a shower pump (3A is hardly enough for an electric shower!), does that not depend upon where the pump is located?
JohnW2, it will be a thermostatic power shower, they look very much like the high powered electric ones, but have both hot and cold water supply with an internal pump inside the enclosure. They only require a small current to run, the motors are normally around 150W.
That assumption may well be correct (particularly given what the OP has told us since I made my comment) - in which case, as TTC said, it would be notifiable. However, we could have been talking about a 'manual' thermostatic shower with a separate shower pump - in which case, as I said, whether or not it were notifiable (probably not) would presumably have depended upon where the pump were located.
As I have said, your assumption has seemingly turned out to have been correct.
I know people who describe their hot water cylinder as a 'boiler'. They are wrong as well.
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