earthing mains voltage safety
Thankyou Flatulent & FvM for answers.
FvM, So basically from what you say i believe it is indeed best to have an earth ground connection at the secondary 0V, or else my secondary willl float at this dangerous (half mains) voltage, and indeed the secondary circuitry would be dangerous to touch ?
So i conclude that an earth ground is not necessary for filtering away noise, but when i do filter away noise, i really end up needing an Earth Ground for safety reasons ?