What is the best gauge of wire to use for connecting LEDs to DCC decoders? I want to use the smallest gauge possible without having any problems. The choices are 18, 22, 24, 30, 32, and 40 gauge. Thanks.
I use 22. Its plenty small and has no problems.
An LED draws only 30mA or less, so the smallest guage you have would be plenty sufficient. The wire on some decoders is between 32 and 40 and that will even handle an incandescent bulb at 12 volts.
Your decoder wire is a good guide, it’s probably 32.
I am going to buy the wire, I don’t already have it. I think I’ll go with 30 gauge, maybe 32.