Latest Discussions : Electrical & Lighting


11:31AM | 08/06/03
Member Since: 08/05/03
3 lifetime posts
Just a quick ques about 220/240V
If an appliance draws 10A @ 120V,
the same appliance can draw 5A @ 240V,
(dual voltage) will it cost less
to run on the 240V, or is based on
wattage? and then voltage wouldn't
matter, or am I off?
Thanks any ideas appreciated.

Tom O

12:24PM | 08/06/03
Member Since: 09/17/02
476 lifetime posts
You're right, its the watts that count. Power (in watts) = voltage x current. Doubling the voltage & halving the current results in the same answer.

There would be a slight savings in the energy lost in the wiring system, provided the wire was not made smaller due to the lower amp draw. If the load you mentioned was on 16 hours a day at 240 volts , you could save about $10 a year based on $.07/kwh and a 100 foot run of wire.


01:01PM | 08/06/03
Member Since: 08/05/03
3 lifetime posts
Tom O
Thanks so much, got caught up
on the print on the sticker,
seen half the amps and seen
dollar signs.


04:42AM | 08/07/03
Member Since: 08/05/03
3 lifetime posts
Thanks k2,
know what you mean. Wear
and tear on the motor of 220V
appliances is less and the
power seems to be there quicker
and more of it, less wind up time
Thanks again everyone.

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