Ring main r1+r2 reading really low - 0.01?

[Amp David]

Are you testing you R1R2 at the consumer unit or at a socket?

You sure you havent got you 2 cpcs touching if test at the CU and they’re not fully sleeved or seperated?

 

[Octopus]

And also circuit works fine live?

Interesting strategy .......... issue with dead tests - so lets go live!

 

[Octopus]

Did you set the Metrel in the "auto" function when using the easi switch?

 

[buzzlightyear]

 

[Gavin John Hyde]

had a similar scenario a while back when replacing a part of a damaged RFC, the electrician who did the original install had twisted the 2 cpc's together in the back of the consumer unit, they were then separated out and sleeved to the earth bar in the CU, so at first glance appeared separate, it caused a little confusion at first, as soon as i untwisted the wires so they were not touching, I got sensible results.

 

[buzzlightyear]

And 123 the easy switch is from metrel does all your ring main tests in one go without having to mess about with connector blocks , not sure if id reccomend though yet

don't,bin it. ill always do it the old way.

 

[AJshep]

Is this going to be a 20amp ring ?

 

[AJshep]

Yep I know it is funny I only mentioned it because I had the pleasure of seeing a mock new 2391-51/52 mutiple choice question paper recently, a similar question was written on it
Strictly text book, taking you as far as the design scope of the course (not allowing diversity for maximum load from the centre of the ring)
Assuming a ridiculous scenario of the ring running at full load (32amps ×R1+Rn) the R1+Rn would already fail the maximum permissible 5% volt drop, and that's before you add the correction factor for the circuit running at 70°c. (a multiplier of 1.2 to R1+Rn)

Really just mentioned it for the trainees as I thought it was a bit of a silly question.