S
scotteng
hello all,
Will be undertaking a consumer box change shortly after i have done a periodic inspection. I cannot see any evidence of a distributers earthing so decided to investigate possibility of a TT system. Getting below 100 ohms ze, which sugests TT, but cant find where the earthing electrode is, main earth disappears into the structure of the building which suggests embedded steel is being used.
Would think it would be necessary to add a rod, of use the existing earthing arrangment??
Will be adding 30ma rcd protection for circuits and 100ma delayed rcd for distrubution.
cheers
Will be undertaking a consumer box change shortly after i have done a periodic inspection. I cannot see any evidence of a distributers earthing so decided to investigate possibility of a TT system. Getting below 100 ohms ze, which sugests TT, but cant find where the earthing electrode is, main earth disappears into the structure of the building which suggests embedded steel is being used.
Would think it would be necessary to add a rod, of use the existing earthing arrangment??
Will be adding 30ma rcd protection for circuits and 100ma delayed rcd for distrubution.
cheers