There are filtering capacitors between mains and ground, see https://www.edaboard.com/threads/capacitors-between-power-and-ground.132216/ https://www.edaboard.c

There are filtering capacitors between mains and ground, see https://www.edaboard.com/threads/capacitors-between-power-and-ground.132216/ https://www.edaboard.com/threads/capacitors-between-power-an...