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Electrical Inspection & Testing Forum
R1 R2 on a 3phase circuit - what's the point in testing to each line conductor?
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 552268" data-attributes="member: 250"><p>(1) Good question..</p><p></p><p>(2) Good to see that you can put forward a valid reason for your understanding. (rather than some lazy bods who just come on here expecting to be spoon fed answers..)</p><p></p><p>(3) The CPC (R2) question.. YES.. you are quite correct.. R2 is what you are needing to prove for BS7671 compliance. And as model forms in appendix 6 do say "R1+R2" OR "R2".. So if you can confirm R2 without the use of any R1.. then there is no need to bother about any of the three phase non-CPC and non Rn conductors.</p><p></p><p>(4) However.. it can also be useful to confirm that all conductors of a circuit are electrically sound along their length... So using the CPC as a ref for the Neutral, and/or L2,L3's isn't a bad thing to do anyway!!!</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 552268, member: 250"] (1) Good question.. (2) Good to see that you can put forward a valid reason for your understanding. (rather than some lazy bods who just come on here expecting to be spoon fed answers..) (3) The CPC (R2) question.. YES.. you are quite correct.. R2 is what you are needing to prove for BS7671 compliance. And as model forms in appendix 6 do say "R1+R2" OR "R2".. So if you can confirm R2 without the use of any R1.. then there is no need to bother about any of the three phase non-CPC and non Rn conductors. (4) However.. it can also be useful to confirm that all conductors of a circuit are electrically sound along their length... So using the CPC as a ref for the Neutral, and/or L2,L3's isn't a bad thing to do anyway!!! [/QUOTE]
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R1 R2 on a 3phase circuit - what's the point in testing to each line conductor?
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