You burn off the enamel of the entire wire or just the end? Are you measuring the resistance just of the heating element wire or are you including the leads, crimps/soldered joint/whatever, etc? Are you holding the DMM leads to the wire in your hands or are you using clips of some sorts? How accurate do you think your DMM is and does it have fresh batteries? Are you POSITIVE of the wire gauge/diameter and have you actually measured it?Quote
UkIan
So my multimeter gave me the 0.8ohms figure, which I think is too high. It is 7m of 24swg (.56mm) wire, which should be 0.47ohms according to this calculator. The wire is enamelled, so I burnt off the enamel AND sanded the ends before measuring. So which is more likely to be accurate?
My guess is that it's a combination of factors but I'd probably go with what the meter read.