R1 + R2 of ring circuit

[haptism]

Hi for a ring circuit, is there any need to measure and enter R1 + R2 values on a schedule of results ? Because an r2 value is already measured (together with r1 and rn). If I needed a ring R1 + R2 value to calculate ZS (although i would find ZS with a socket tester so really no need; but if I did) would i find it using the formula ZS = (r1 + r2)/4 ? Thanks all

 

[Pete999]

Verification that it is a ring circuit would be a good reason.

Agree totaly

 

[Hellmooth]

That would be r1 rn r2 . not R1 + R2

R1 + R2 IS required to confirm polarity

r1 rn and r2 will tell you if your ring is interconnected?

 

[Pete999]

correct

r2 is end to end
R2 is when joined together

Eh?

 

[sparksburnout]

Pete demo one of your videos quick.....
No sod it I am going to revert to lyrics from the great man, all together now:
Has he lost his mind
can he see or is he blind?
Is he alive or dead
Has he thought within his head?


Sorry been at the home brew again
Come on FFS

 

[Pete999]

Pete demo one of your videos quick.....
No sod it I am going to revert to lyrics from the great man, all together now:
Has he lost his mind
can he see or is he blind?
Is he alive or dead
Has he thought within his head?


Sorry been at the home brew again
Come on FFS

Love it

 

[Pete999]

Pete demo one of your videos quick.....
No sod it I am going to revert to lyrics from the great man, all together now:
Has he lost his mind
can he see or is he blind?
Is he alive or dead
Has he thought within his head?


Sorry been at the home brew again
Come on FFS

Been on the red and she relented and poured me a nice slug of Single Malt could be a bit tender in the morning

 

[Pete999]

But that doesn't retract from WTF

 

[sparksburnout]

Been on the red and she relented and poured me a nice slug of Single Malt could be a bit tender in the morning

What was it?? You tried any of that Welsh stuff yet??
And how do you get your Mrs to "pour me a slug"?? I just get "I thought you were having a night off it today?"

 

[sparksburnout]

Or was it supposed to be "A day off it tonight". Oh well....

 

[hightower]

I'm with @Hellmooth and @Pete999 on this one - your RFC testing is a 3-stage process. r1, r2, and rn values are pretty meaningless without a valid test in the other two stages.

@jackhammerJIM R1+R2 doesn't prove polarity on it's own. If you only carry out R1+R2 you would not see a L-E reversed. You need to carry out an R1+RN as part of the process which will then fully prove polarity.

 

[lemonkettaz]

r1 resistance of line, r2 resistance of cpc, rn resistance of N conductors

R1+R2 resistance of the circuit at furthest point, in a ring though should all be the same (every point)

Zs = r1 + r2 / 4 is not right

Zs = Ze + (R1+R2)

 

[Pete999]

R1 + R2 of ring circuit - http://www.electriciansforums.co.uk/threads/r1-r2-of-ring-circuit.118206/page-2#post-1238028

 

[Pete999]

Pete demo one of your videos quick.....
No sod it I am going to revert to lyrics from the great man, all together now:
Has he lost his mind
can he see or is he blind?
Is he alive or dead
Has he thought within his head?


Sorry been at the home brew again
Come on FFS

See Mate I relented, couldn't resist, did 2 vids just to be sure hope you like it (for sparksburnout) may try and find some of that Welsh gear you are harping on about,

 

[telectrix]

Welsh gear you are harping on about

thought harp was irish (guinness).

 

[Pete999]

Welsh gear you are harping on about

thought harp was irish (guinness).

No mate sparksburnout was extoling virtues of a Welsh Malt