Question: An addition 13A socket final circuit to be added to an existing MCB board with parameters given as below: the impedance of LIVE and Neutral

An addition 13A socket final circuit to be added to an existing MCB board with parameters given as below:

the impedance of LIVE and Neutral conductors are 0.04 ohm each,

the impedance of Circuit Protective Conductor is 0.05 ohm and,

the earth resistance is 0.2 ohm.

Calculate the earth fault loop impedance, earth fault current and touch voltage of this final circuit.

Calculate the prospectus short circuit current.

Could an existing 20A RCBO with breaking capacity 6kA suitable for this final circuit?

Explain with I-t characteristic curve how a 160A HRC fuse has backup protection for a 20A DP RCBO, B.C. 6kA.

find ZL,ZS

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