@tryst that happened when we got out new oven as well - apparently there's an issue where, if they sit in a warehouse a while, might end up a touch more moist than they can handle, and they basically need to sit on a bench supply for a while to dry themselves out... hopefully it's just that :)
@leinir Figured it out. "Bench supply" is a euphemism for "no CPC connection". I've put it on 280C for a few hours and then I'll take new Riso and Ileak readings.
@tryst sounds about right - this also is at least part of the reason I tend to leave that to people who actually know what they're talking about, but at least it should hopefully do the trick :)
@leinir It did the trick. It's no longer tripping the RCD. Insulation resistance is still a little low, but it is improving with each use.
@leinir Bench supply, as in put DC through the elements?