I recently did the wiring and was getting the certificate for the work I did and the electrician failed an item in the bathroom.
Apparantly my plastic plated shaver socket which is being supplied by the lights circuit (with the 1.5mm earth) requires supplementary earth bonding. He told me to take a 4mm earth wire from the radiator up the wall and take it into the light switch so the light circuit is bonded.
What I don't understand from electrical theory is why does an isolation transformer, which is what a shaver socket is, require supplementary earth bonding?
Apparantly my plastic plated shaver socket which is being supplied by the lights circuit (with the 1.5mm earth) requires supplementary earth bonding. He told me to take a 4mm earth wire from the radiator up the wall and take it into the light switch so the light circuit is bonded.
What I don't understand from electrical theory is why does an isolation transformer, which is what a shaver socket is, require supplementary earth bonding?