Originally Posted by Warfarin88
Not sure where the best place to ask this is.
Question is about wiring.
I know (or at least I think I know) that the length of a wire can reduce the current that flows along it before it gets to the end point. That's why you need a heavier gauge extension cord to run a high draw appliance without blowing fuses.
What's the mechanics here?
Can the gauge of a wire increase resistance?
To frame it terms of what I'm dealing with, if I used a relatively heavy (20ish) gauge wire to extend fan leads a short distance (around a 12-18 inches) could this create enough resistance that a higher watt fan wouldn't power up?
I've troubleshot all of my wiring, and everything mechanically is sound. If I don't use the leads, the controller will power the higher wattage fan. If I use a lower wattage fan, the controller will power the fans with the leads I made.
I'm trying to figure out why the leads don't work with the higher powered fans, and what I might be able to do to fix it.
Thanks a ton in advance for any assistance!
The wires appear to electrons as tubes.
Obviously, there's less resistance with a bigger tube.
10gauge wire has half the resistance of a 20-gauge wire, length and material being equal.
A high-power device will still run, just at less power. You risk heating up the cord and starting a fire, however, so if you notice your fan's not revving as high as it used to, you need bigger wires.