You have not actually asked a question there, this diagram shows my thoughts but you will have to check and ensure that you understand and agree with these designations.
Installation protective conductors.jpg
 

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If you're a qualified, trainee, or retired electrician - Which country is it that your work will be / is / was aimed at?
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Title
Ring final circuit conductors and value Zs and R1+R2
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Electrical Course Trainees Only
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sparkyspark2258,
Last reply from
Richard Burns,
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