On 05/05/18 09:20, ARW wrote:
On 05/05/2018 08:48, Harry Bloomfield wrote:
ARW was thinking very hard :
Twin 6ft T8, is that not supposed to be 140W?
Hairdrier, takes longer to dry your hair?
Vacuum cleaner, more runs to get the cat hairs up:-)
Microwave? Well that like a quicky in the pub toilets, all done in 3
minutes and everything is hot and steamy.
Infra red patio heater, put a jumper on
Fridge, no one is sure about that but mine works OK on 253V
Dishwasher, surely most of the energy is in heating the water so FA
saving

I don't think anyone has mentioned, that lowering the
voltage/increasing the current, will produce more waste heat in the
internal wiring of the building. It will not be much extra waste heat,
but...


Lowering the incoming voltage will not increase the current on resistive
loads.

Thats not what he said

If you need to draw the same power at lower voltage, you will draw more
current.

That will mean extra losses in the wiring.

The key is the 'same power'

Many things will automatically compensate for a lower voltahege by
drawing more current.

All SMPSUS for a start.

Some regulated motors. - a synchronous motor will draw what it has to to
match the load at synchronous output speed.



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No Apple devices were knowingly used in the preparation of this post.