@Arthur P. Bloom posted:Find an old washing machine. Cut out the wiring harness. They are made of "MTW" (machine tool wire) which is flexible and comes in several gauges and colors in each machine. You will get enough for a dozen trains from one machine, free. You don't need to worry about heat in a toy train.
The original looks like old school heat resistant wire with that asbestos coated cloth look to it.
John