The temperature coefficient of resistance for copper is rather small: 0.4%/C, it takes a 25C temperature rise to get a 10% increase in resistance= .. If you want to account for heating's effect on wire resistance, just assume that resistance is something like 10-20% higher than measured. On Friday, October 13, 2017, Justin Richards wrote: > Quote:- > Or maybe easier to measure the resistance of the wire and just multiply > by that max current expected to give you the voltage drop. Also there > > > I figure resistance measurements dont account for heating effects. > > I will do both out of curiosity i.e measure resistance then calculate bas= ed > on volt drop for a given current. > > Justin > On 13 October 2017 at 15:49, Jim Ruxton > wrote: > > > > > > Volt drop over length. To test this I was going to double the length, > > then > > > using my trusty Bench PSU limit current to Max expected then place a > > short > > > at far end and measure the volt drop. Sound feasible.? > > Or maybe easier to measure the resistance of the wire and just multiply > > by that max current expected to give you the voltage drop. Also there > > are specs and tables that will give you the resistance of various gauge > > wires. You can add a safety factor to that to be sure you are covered. > > Jim > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 Jason White --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .