watts to amps

[kermit911]

Is there a chart out there to compair WATS to AMPS?

[ugly_bob]

It depends on the voltage

Power (Watts) = Current (Amps) x Potential Difference (Volts)

So...
with UK mains,
a 2.4KW heater would be 10 amps
a 60W lightbulb would be 0.25 amps
etc etc

[qapmoc]

Not quite correct there Bob, you are using the old UK standard voltage of 240 volts to calculate from but in fact with the European harmonized voltage it is now 230v.

Yeah, I know that in reality it can still be 240 volts within the +- allowable error range but I just wanted to remind everybody not to forget and use the old value.

[ugly_bob]

yeah, sorry. Just works out easier for the example of a lightbulb.

[kermit911]

15000 WATTS at 120 VOLTS equals 125 AMPS ??? Is that corect?

[ugly_bob]

yep. That won't be on domestic mains though

[burnhal]

all the calculations done above have been done with the formula for Direct Current. ie- what you get from a battery. It is a reasonable rule of thumb if you want a quick and dirty calculation but not strictly accurate for AC- alternating current- ie what comes out of your sockets! Calculation of power for AC includes whether the load is capacitive or inductive or a combination of both. The phase shift through these loads affects the power calculation. Simply multiplying Voltage and Current in AC gives something known as Reactive Power

[Kim A]

Don't know if this site will have it, but it has lots of conversion calculators for loads of applications

www.lenntech.com

Sorry - can't do those fancy blue link things, only typing, bit of a Luddite, see!