When protecting a TT installation with an rcd (no less than 100 mA)due to the Ze reading being very poor (and unable to reposition earth rods or install new ones) where would you connect your main earthing terminal to if there is no main incoming earth?The only way i can think of is to connect it to the neutral bar to enable all earthed and bonded circuit to be included into the inbalance operation of the rcd?But this does not sound like good practice to me!any ideas?

[This message has been edited by james S (edited 04-10-2005).]