I have no problem with spurring off a shower radial for low powered equipment which is integral to a shower enclosure, such as lights and extractor fans.
A neighbour of mine had a car (Triumph of some sort, IIRC) plagued with exhaust system failures which were due to insufficient supports - it all waggled around and got fatigue fractures.
So he made up his own extra support bracket and fitted it. Result.
Unfortunately he didn't do quite a good enough job, and the bracket eventually broke, and when he took the car for an MOT they failed it cos it had a broken exhaust bracket....
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