Hi all, I have a few questions regarding a TT system. First time ive worked on one (Self employed now and throughout my apprenticeship and self employed career I haven't had one before) 16mm2 Tails coming in from the rec. There is 2x 2.5 (looks about right) Single earths going to the incoming gas and one disappears towards water boards stop cock in the pavement. The property has a 30mA RCD main switch. I'm right in thinking I need to upgrade tails to 25mm2 and bonding to 10mm2. I will install a Earth Stake with 16mm2 earth to the fuseboard. Does the RCD man switch need to be changed to a lower mA? Is there a maximum length that the earth stake can go? Is it acceptable to take 16mm2 from stake to the DB then take bonding from there or do they have to come from the stake? or can I put a MET in for them?
Any advice appreciated. Thanks a lot.
Any advice appreciated. Thanks a lot.