hello people
Never changed a DB on a TT system before, question is if all final circuits will have 30ma RCBO devices what (if required) RCD will I need to install on the meter tails supplying the DB.
The rod currently with the Earth to MET disconnected reads a healthy ze- 98ohms which is quite good for a TT, with earthing conductor connected parallel with paths give me 0.22zdb.
Never changed a DB on a TT system before, question is if all final circuits will have 30ma RCBO devices what (if required) RCD will I need to install on the meter tails supplying the DB.
The rod currently with the Earth to MET disconnected reads a healthy ze- 98ohms which is quite good for a TT, with earthing conductor connected parallel with paths give me 0.22zdb.
Last edited: