Hi everyone, I’m designing a PCB that will switch 230 VAC at about 8 A using a relay. I’m still learning and would like to check if my understanding is correct: Trace width: At 50 Hz (mains), skin effect is negligible, so I can size the copper like DC. For 8 A on 1 oz copper I think I need around 6–8 mm width or a large copper pour for about a 20 °C rise. (With 2 oz copper it seems about 3–4 mm width would be enough.) Does that sound right? Creepage / clearance: When people say “gi...
