Nichrome Amp Calculation???

SMUGangsta said:

Hi

Just a quick one,

I am trying to figure out the current used by my nichrome wire.

Is is 50Ω per 1000mm (1m) - is this a normal ohms law thing?

im using 30mm

V=I×R

so re-arranged to find I would be

I=V/R

I = 12v/1.5Ω

So the nichrome draws 8Amps as a heating element. <<<is this right?

Will the resistance of the wire change as it heats up, I would like to switch it with a 10A relay.

Thanks

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