Powerman Posted December 22, 2015 Author Report Share Posted December 22, 2015 I asked this on another forum. I C&P here. Hopefully it's not that much out of context... Honestly, I'm still having a hard time wrapping my head around this. In any circuit you can get a short. So a wire 10 cm long between +/- terminals has X resistance. Coil it, loop it and touch only the tops together now you have a short. Not the distance between the two +/- terminals is 2 cm. Who cares... Except now 2 cm of wire only has 1/5 the resistance of the straight wire. So this is the part I don't get. I can only assume. I going to use numbers straight out of my ass to illustrate the point. I assume measuring the effect of temp on resistance is on a material at a equal temp. So 2 cm of wire at the same temp for the whole length of the wire. 2 cm wire with 1 ohm at 100 degrees. Heat it up to 200 degrees it has 2 ohms. But if 1 cm is 300 degrees, and 1 cm is 100 degrees, the average is 200 degrees. 2 ohms. If a coil is contacting only at the top, and current is shorted, I could see the short heating up much hotter than the rest of the coil. I could see TC limiting power because it sees the rise. The top is hotter than the bottom and the average is the rise. But if there is a short, then that 10 cm wire is now only 2 cm. And the natural resistance of the wire would show that. 10 cm with 1 ohm is now 2 cm with 0.2 ohm resistance. The part I don't get is why does my mod see the full resistance of the full length of the wire, but TC seems to only see the rise in one small part of the wire. Path of least resistance should be measured. A 10 cm length of wire shows 1 ohm on mod, not 0.2 of a shorted contact coil? I hope that makes sense. Link to comment Share on other sites More sharing options...
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