14 new 9.5kw showers to be installed on existing supply

[i=p/u]

Hmmmmm higher voltage lower current..

 

[Gavin A]

Hmmmmm higher voltage lower current..

current draw stays constant, at higher voltage it will draw higher wattage, I think... sunday head on.

 

[i=p/u]

Uhooo ..... Think we need a professional technician , but I'd say current changes off higher voltage

 

[Sintra]

The resistance remains constant. Work the rest out using I=V/R

 

[matthunt]

Hi Guys, ok, back to basics with a voltage dependant load, i.e. a shower which is purely resistive current is proportional to voltage so the higher the voltage, the higher the current, the higher the wattage. now with a voltage independent load, the wattage remains constant so the higher the voltage the lower the current etc, etc

 

[matthunt]

Look at a basic 1kw load supplied at 250v, the current will be 4 amps yes! so using Ohms law 250/4=62.5Ohms, if voltage is reduced to 230v then 230/62.5Ohms= 3.68amps, so the new KW usage is KW=V*I so 230 * 3.68 = 846 watts, a saving of 154watts by reducing the voltage by 20volts. This formula will only work for a voltage dependant load, eg a shower.

 

[yarcyk]

These are NOT single dwellings by the way

But there is still same diversity allowed for small hotels etc., exactly the same

 

[sparky351355]

job's bad enough without getting the wet-pants idiots to screw it up even more.

Haha nice one

 

[LeckyBill]

now up to 83 thereads when the anser is on the first page

 

[sparky351355]

now up to 83 thereads when the anser is on the first page

really? Please do share

 

[telectrix]

please NO. that's be 87 posts.

 

[sparky351355]

Ive opened a can of worms here me thinks

 

[sparky351355]

Might go 50/50 power shower to elec shower ! And let ghat be an end to it! Lol.

 

[telectrix]

at least they'll be clean worms with 14 showers to choose from

 

[sparky351355]

Many thanks for the input people , its been interesting