I've never liked Y-type capacitors, they are effectively lipstick on a pig. mad
And inherently, the way they are installed, they will fail, that is without them being mass-produced
junk.
Back in the day when they first came out, they used paper, aluminium foil and were injected with
mineral oil.
These days, they could be anything, if some of them are even in fact capacitors inside the body.
It's no wonder people are getting shocks off of things they aren't meant to.
When these were first bought into the market, they had a withstand voltage of about 750VAC,
nowadays you see them with ratings like 550VAC, I removed one last week that had a rating
of 315V, which is below the peak voltage rating of a 230V mains circuit.