My new property has an TT earth but at some point someone has put block paving over the earth spike location making it unservicable/uninspectable, although it is within acceptable impedance limits currently. The property also has a PME supply which is currently not connected to the installation earth.
So the options are to dig up the driveway to locate the earth spike and/or relocate it somewhere more suitable, or to ditch the spike and switch to a TN-C-S setup. Is there an order of preference when it comes to these things? The only additional factor is that we have an outbuilding wired from the main house fusebox including the CPC, which I beleive lends itself better to TT?
So the options are to dig up the driveway to locate the earth spike and/or relocate it somewhere more suitable, or to ditch the spike and switch to a TN-C-S setup. Is there an order of preference when it comes to these things? The only additional factor is that we have an outbuilding wired from the main house fusebox including the CPC, which I beleive lends itself better to TT?