What is the required creepage (e.g. trace-to-trace) distance for PCBs handling 240VAC rms? What about 120VAC?
This is for UL and CE certification.
The standards for PCB Creepage (e.g. the distance across the surface of a PCB between high-voltage connections) are locked up in propietaryproprietary, pay-only IEC standards (specifically, IEC Report 664/664A ).
This is troubling, as following these standards is a good way to ensure safety, even if you never intend to actually get your project UL or CE certified.
Can we get a nice summary of what trace-trace spacing should be maintained for common voltages (e.g. 120V, 240V), with common materials (e.g. FR4, etc...)?