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Why does this flying bug UV light trap intermittently trigger my GFCI?

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amyk:
Trace out the schematic, it looks simple enough to be a capacitive dropper.

Ed.Kloonk:

--- Quote from: timenutgoblin on November 18, 2022, 09:58:37 am ---Check VR1 (varistor?), it looks like it might be damaged. Gnat's what I reckon.

--- End quote ---

What you did there. I see it.

rdl:
I have bad gnat problems every year. I guess gnats, could be fruit flies or whatever. What works best to keep them under control is a bowl of vinegar with some water and dish washing soap added. I had a mini bug zapper with UV LEDs and it would kill a few every day, but they drown by the dozens in the vinegar bowl.

james_s:

--- Quote from: pcprogrammer on November 19, 2022, 06:54:01 am ---But the fact that it has no ground connection, it is not likely due to current leakage. Most GFCI's are 30mA which is a lot of current to be leaking through plastic. So what comes to mind is to much capacitive or inductive load, causing a large enough phase difference to trip the GFCI. But the circuit board does not show a lot of this.

--- End quote ---

The OP is in the USA, GFCI trip current is 5mA.

pcprogrammer:

--- Quote from: james_s on November 19, 2022, 06:55:36 pm ---The OP is in the USA, GFCI trip current is 5mA.

--- End quote ---

Wow that is low. Over here 30mA is common and comes in two types, slow and fast. There also used to be a 300mA or even 500mA version for a circuit with a washing machine or other type of inductive load, but not sure if they are still sold. Nowadays the slow type is used for the washing machine.

But which such a low current it must trip rather easily.

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