- Reaction score
- 520
an eicr was carried out to an industrial plant area were the zs readings were all high readings above the maximum for a tns installation i noticed that the supply cable in question was getting monitored by an elcb. However recently the company or contractors. have driven in earth rods local to the intake turning this into a TT install and the ze reading at the main db is now 15ohms which is acceptable for tt. My question is would you be happy with this, should there be labels indicating that this is a tt installation. interested to here your thoughts and advice. im told by the maintenance guys its been like this for years and the high reading was due to the fact that the separate cpc was stolen for scrap and was relying on the armour of the cable solely.