Installed a MK 18th edition duel board and went to test what looked like a TNS system but the ohms were 2-4. Had the supplier check for PME options but it reads .9, so they have told the customer get an earth rod installed.
As we now have a metal enclosure needed and whether i install a 30mamp or TD RCD a the front, we have 2 problems. My rod would be approx 15m away and likely reads of 20omhs or more giving super low V returns thus the supplier fuse will not break. Aside of this, should the cable between the supplier fuse and consumer unit get damage and touch the metal box there would sufficient risk to life and property as this would be before the RCD's
How do we get around this? Which regs and physically what are people installing as typical NICEIC website down and contact page fails. This is a domestic single phase property.
As we now have a metal enclosure needed and whether i install a 30mamp or TD RCD a the front, we have 2 problems. My rod would be approx 15m away and likely reads of 20omhs or more giving super low V returns thus the supplier fuse will not break. Aside of this, should the cable between the supplier fuse and consumer unit get damage and touch the metal box there would sufficient risk to life and property as this would be before the RCD's
How do we get around this? Which regs and physically what are people installing as typical NICEIC website down and contact page fails. This is a domestic single phase property.