N
Nigel
Looks like it was never installed correctly unfortunately.
In this instance I would code it as a C2 and quote to install a 500mA RCD for fault protection for the circuits that do not meet the maximum permitted Zs via the MCB.
Remember the RCD will need to be installed at the supply end of the cable.
No need to TT it and make the earth even worse.
In this instance I would code it as a C2 and quote to install a 500mA RCD for fault protection for the circuits that do not meet the maximum permitted Zs via the MCB.
Remember the RCD will need to be installed at the supply end of the cable.
No need to TT it and make the earth even worse.