D
davesparks
It is a TNS system, the earth rod is providing an earth reference to make on epile of the supply neutral and is not part of the earth fault loop.
The earth fault loop is from the source of supply out via the live conductor and returns via the earth conductor back to the neutral point via the N-E link. Standard TNS arrangement except the source of supply is within the installation instead of being external.
The issue you have with ADS is that the source of supply cannot provide enough fault current to operate protective devices in the required time (if at all)
Engage the services of someone who understands the type of installation.
