What is is the hole size on a printed circuit board for a 20 gauge 19 strand wire?
This wire should be very near 0.037" diameter. Most are saying the hole size should be at least 1.25 times this diameter as a minimum so that would be about 0.047" or 1.17mm. This is kind of considered a minimum size. A hole could be as much as 1.5 times the wire size which would be 0.055" or 1.41mm. There is no exact answer but this is a usable range. Others may say double the wire size but, that gets to be a really big hole and seems oversized to me.