Hi,
I have a couple strip heaters which are rated 240vac 500W.
If the voltage and power are given, so the max current should be loaded about 2.08Aac, then caculate the resistance is about 115 Ohm, is that right? R = V/I
But when use fluke meter to measure resistance of this heater, it is measured 28.9 Ohm. So it is different resistance to caculation base on rating.
Can any one explain this difference?
Thanks
I have a couple strip heaters which are rated 240vac 500W.
If the voltage and power are given, so the max current should be loaded about 2.08Aac, then caculate the resistance is about 115 Ohm, is that right? R = V/I
But when use fluke meter to measure resistance of this heater, it is measured 28.9 Ohm. So it is different resistance to caculation base on rating.
Can any one explain this difference?
Thanks