Socket ring readings. R1+R2 approx half r1, r2

[SpannerSpark]

I havent come across this before, wondered if its common and what it signifies in the ring.
Remeasured 3 times and got within 20mohms or so each time so pretty sure its not a zeroing the meter thing.
2.5:1.5 TW/E ring. I went around all of downstairs rooms, did min of few sockets in each room nice even results all the way around. Just not 1/4 of r1, r2 etc

r1=1.15
r2=1.82
rn=1.13

R1+Rn =0.57 (approx half)
R1+R2=0.78 (only a little bit less than half)

Any ideas?
PS Job was to move a socket and add a couple more.
Install is in <10 year old house, doesnt look to have been messed about much apart from has had an extension added in the last few years.

 

[telectrix]

comes out in my head as 0.263 as opposed to 0.25. not far out. IMO.

 

[Silly Sausage]

They look fine to me as well.
Remember measurement/contact errors.
I wouldn't worry about a few 100ths of Ohms!
It's Friday, go and enjoy yourself.

 

[Badged01]

Correct me if Im missing something hugely obvious here but based on your r1/r2/rn readings you should be looking at getting around R1+R2 = 0.74 and R1+Rn = 0.57

You actually get 0.78 & 0.57? ---- whats the issue? They are pretty good results especially if constant around the sockets!

 

[MDJ]

comes out in my head as 0.263 as opposed to 0.25. not far out. IMO.

where does it say 0.25 Tel?

 

[telectrix]

case of overthinking, methinks. as archie says, it's friday, it's beer o'clock, move on.

 

[Silly Sausage]

where does it say 0.25 Tel?

He's been on the Creamflow all day!

 

[Badged01]

where does it say 0.25 Tel?

Its an alternative mathematical model to calculating the variance. Add up the r1/r2/rn figures and divide by 15 (approx)

 

[MDJ]

Its an alternative mathematical model to calculating the variance. Add up the r1/r2/rn figures and divide by 15 (approx)

Yes I know, it is Friday fella, think about it :devilish:

 

[telectrix]

nah..... 0.25 is 1/4 as in R1+R2 = (r1+r2)/4. humpff.

 

[ifindoubtdont]

I fink Tels showin off cos e can do mentul maffs quicker van we can press buttons on calculator lol. 0.78 / 0.263 = 2.96. 1.15 + 1.82 = 2.97.

 

[MDJ]

nah..... 0.25 is 1/4 as in R1+R2 = (r1+r2)/4. humpff.

yep and when I worked it out it was 0.23 rather than the 0.263, but I bet you had a calculator?

 

[SpannerSpark]

Thanks guys. I havent done any testing for a good while and just got a mental block that I should be expecting R1+R2 to be 1/4 of r1 or r2, rather than r1+r2. When i think about it i am being a bell-end.

 

[telectrix]

we all make mistakes, as the hedgehog said, climbing off the back of the bog-brush.