Pre-Printed Circuit Board Limits

PaulyWally

Member
2019-09-21 9:01 pm
Hi All,


I have a few generic, pre-printed PCBs similar to the ones below. Question is, how much voltage/current can I expect to run through these safely?


Thanks!



60561-1.jpg





s-l300.jpg
 
The KiCAD calculator can calculate these things for you when you know the sizes. The metal tracks are obviously uncoated external layer tracks. Attached are some examples.

By the way, for anything connected to 230 V AC mains, you need at least 3 mm of spacing for equipment with safety earth and 6 mm between conductor and anything you can touch without safety earth. That's because there can be nasty voltage peaks on the mains when a large load is switched off or lightning hits a high-voltage line.
 

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