I'm not sure. I considered the possibility that in making the PCB, the
bonding of the top layer to the ground plane layer might be faulty,
creating an air gap between surfaces that are, or might be, conductive.
That is why I recommended as much creepage distance as possible.
On 2024-11-06 21:27, Richard Nute wrote:
Depending on the PCB fabrication, I would expect this construction to
be solid insulation from the 230VAC to the ground plane. Such
construction has no clearance or creepage.
--
OOO - Own Opinions Only
Best Wishes
John Woodgate
Keep trying
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