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Discuss Periodic--R2 method-- Ring Main i.d. problems in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net

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Silk6911

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Hey guys,

Carrying out a periodic on an office/factory premises with several medium to large 3ph DB's. (36 way etc)
I'm finding one of the biggest pains is trying to find the relevant ring loops (L-L ,N-N, Cpc-Cpc if any!!)..A lot of the circuits have not been connected sequencially (or marked) on the nuetral and earth bars and it's becoming a time and cost issue now to try and find them. Some of the DB's are a nightmare!

What i'm looking at doing is just using the R2 method with the wander lead to at least prove an earth path back. Been told as a rough guide under 1.00ohm is good. There was an R2 table to refer to in the old regs but this seems to have been removed from new 17th edition.

Is it ok to use R2 method for ring mains?

Obviously can note as a code 2 or 3 " poor id of ccts requires further investigation" ...but seems a bit of a get out.

Any advice/tips would be great.

Ta
 
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Guest123

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Silk6911

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