So i recently inherited a design as a new graduate, and am currently in the process of working on the next board revision. The design currently calls for a 24VAC line to come out of a G6k relay, leaves the board via a connector, and eventually turns a larger contactor on in the boards housing. The current design typically has 10mil signal lines, but for the 24VDC and 24VAC, the previous designer tried to use 20mil lines.
The problem is, in this case, he used 10mil lines for the 24VAC trace which eventually outputs to the contactor. The good news is we are just powering relays with the trace. I tested the amperage coming out of the relay on the board, and it is only about 230mA or so, which seems well within the thresholds for a 1oz 10mil trace.
I know this is a frequently asked question and I have been doing the reading, but would love an opinion from someone with a little more experience. 24VAC on a 10mil trace ok if we arent trying to pull too much current? Seems like I could pull 4x that before I had to start worrying if i can trust these calculators to any extent.
Thanks for any help or guidance!