- #1
fonz
- 151
- 5
If an entire system was floating wrt Earth via infinite impedance and a person (grounded) touches a conductor am I right in saying nothing would happen due to the fact there is no return path through earth?
Presumably the only way to detect an Earth fault in this case is to measure the impedance of the supply wrt to Earth and alarm if it goes below a certain value?
In this case why aren't all distributions completely insulated from earth? Normally the negative is earthed and Earth faults are cleared either by the supply fuse/breaker or by residual current detection.
Presumably the only way to detect an Earth fault in this case is to measure the impedance of the supply wrt to Earth and alarm if it goes below a certain value?
In this case why aren't all distributions completely insulated from earth? Normally the negative is earthed and Earth faults are cleared either by the supply fuse/breaker or by residual current detection.