reduce electricity consumption

[Mjolinor]

Sorry m8 not quite true, because current is directly proportional to voltage, and inversly proportional to resistance, so if you reduce the voltage the current goes down.

This means because there has been no change to the device resistance to compensate for the reduced voltage the lower current flowing will produce a lower Amps times Volts resulting in lower wattage.

This means the meter would go round more slowly, but the device supplied in this way would not do the job it was designed to in the same amount of time, for instance an electric kettle would take longer to boil water, the hoover wouldn't suck up aswell, and lots of other houshold items would become irritating.

Regards mahler.

This is only true in linear, passive devices. Modern electronic is not linear or passive, how else do you expect that a power supply will run from both 110 and 230 with no changes, because the current goes up when the voltage goes down so that whatever is being powered is supplied with it's required amount of power.

[Mjolinor]

Only true for motors
Higher supply voltage, greater back EMF, less current. Lower supply voltage, smaller back EMF, higher current.

Resistive devices (kettles, heaters, filament lamps)
Lower voltage, lower current (same as it would be if DC devices were used). Less power used, probably doesn't work properly anymore. This is assuming it does increase the resistance of the element sufficiently otherwise you will get massive current and probably a fried supply or device

Electronics in general (including compact florescent / energy saver lamps)
Lower supply voltage, active compensation circuit, increased current.

[captainjim]

thanks for the replys boys,definately a no no on this one

[dctyper]

Hi guys as you know I'm new to this forum, and it seems a nice place to be, but I think it was probably a mistake for me to become involved in this thread, because "I havn't got a little knowledge" but rather a high level of theoretical and practicle knowledge of electronics and the less complicated subject of Electrical work is easy peasy to me.

I am a 57 year old advanced electronics equipment designer, and I would be pleased to advise you on facts, but it seem a waste of time with the fixed ideas held by some members in this thread.

Please carry on enjoying yourselves, and I'l keep out of it.

Regards mahler.

welcome to the forum, this is one of many threads

doesnt take much to get us lot started

dc

[Canker_Canison]

Realistically there are only 2 ways of lowering your bills without going 'green'....

1) Use less electric. Buy a monitor or get one free from your supplier. This will show you when you use the most electric, then work on cutting it down.

2) Plan your usage. Try not to use a lot of electrical devices all at once. Running a washer\dryer, Electric oven, mircowave, kettle, hoover, etc all at the same time will use more electricity than if you used them one at a time.