Originally Posted by
fast-ho-cars
multistrand wire actually passes more current and voltage for RC cars. 1/24 slotcar road course racers and drag racers (even when no movement is needed) use it for the same reason. more strands the better, the more surface area you gain over a solid conductor the same gauge
https://en.wikipedia.org/wiki/Skin_effect
there is another law that many do not take into consideration, sure ESC designers do, but there is a point were the gauge wire used becomes too large for the available power source resulting in conductivity losses. called called MHO's law also referred to Siemens. i once saw a racer wire up a car with speaker monster wire.
the next big thing RC cars still hasn't occured, is the use on "litz" wire for stators or armatures of years passed. not sure they ever will, in other hobbies it is permanently banned.
litz wire is multistrand arm/stator wire...from wiki
"The wire is designed to reduce the skin effect and proximity effect losses in conductors used at frequencies up to about 1 MHz.[1] It consists of many thin wire strands, individually insulated and twisted or woven together, following one of several carefully prescribed patterns[2] often involving several levels (groups of twisted wires are twisted together, etc.). This winding pattern equalizes the proportion of the overall length over which each strand is at the outside of the conductor. "
Did you read this part in the in the Wikipedia article on Litz wire (second sentence in 5th paragraph under "Skin effect"):
"The strands must be insulated from each other—otherwise all the wires in the bundle would short together, behave like a single large wire, and still have skin effect problems."
Seems to say there is no benefit (toward reducing skin effect) of the miltistranding in the wire we use for RCs because the strands aren't insulated from one another.
Then again, we are not operating at the kind of frequencies where the skin effect is real significant (4 pole RC motor at 40K RPM is only 8,000 Hz).