But the fixture draws less than an amp and it can take 15 amp portable stove for a time but it can’t take a simple fixture
I also test these monthly as directed
GFCI does not care, what is the current draw. The only thing it senses is, whether all current flowing into the Line wire returns back via the Neutral.
The first Kirchoff's law says, unless fhere is some current path somewhere else, the returned current is exactly the same. So if the GFCI senses any mismatch (the US socket GFCI's respond to 6mA mismatch, the sensitivity required in European installations is maximum 30mA; of course older installations may either feature less sensitive type or no GFCI at all, based on what was in the code at the time of commisioning), it treats it as there is an insulation failure somewhere, so an electrocution risk, so it trips and shuts the affected branch down.
So a tripping GFCI really means there is some current leakage between the functional circuit and grounded metal work, just a capacitor current wont trip it (US 6mA GFCI's are phase sensitive, so respond to only resistive phase component, the "30mA" European ones have sensitivity around 25mA (and phase insensitive, due to 3-phase installation being a common place, so a leak from other phase cannot be distinguished from the capacitor), which is way above the allowed ground currents, so just the Y capacitors wont trip it either.
