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Inspection & test
Earth fault loop & prospective fault current
Combines Ze at origin with the R1+R2 of the final circuit to give Zs, and calculates the prospective fault current at both the origin and the far end of the circuit. Compare Ipf at the origin against the breaking capacity of every protective device downstream.
Results
Calculated Zs0.80Ω
Ipf at origin (from Ze)0.66kA
Ipf at far end (from Zs)0.29kA