Help or advice with r1+r2 ring.

[Alextrician]

So I’ve finished a rewire recently and I’ve come to testing the ring circuit for the down stairs sockets and I’m not getting what I’m testing in regards to the calculation

LL: 0.36
NN:0.36
EE:0.60(there abouts)

Now when I’m doing the r1+r2 crossing the opposite live and earths but the calculation for obtaining it isn’t what I’m getting when recording the results.

So 0.36+0.36/4= 0.18

But when testing at the sockets I’m getting readings of 0.30 ohms. I’m going to try another calibrated tester this weekend.


Any advice would be appreciated

Thanks

 

[Dillb]

It its a R1+R2 when doing the “figure of 8” on a RFC. Are you testing at the terminals of the socket or are you testing with a socket tester through the socket itself?

 

[Alextrician]

It its a R1+R2 when doing the “figure of 8” on a RFC. Are you testing at the terminals of the socket or are you testing with a socket tester through the socket itself?

I did both I took all the fronts off and tested at the terminals and also went round with a socket tester.

 

[gazdkw82]

Are you testing at the back of the socket or using a socket tester adapter?

Check all terminations

Have you zero'd before every test?

Your allow 0.05 above and below your calculated reading (0.18)

 

[Octopus]

Dirty or unused sockets can give odd readings ...

But you are calculating it wrong ....

0.36 + 0.60 = 0.96 / 4 = 0.24

 

[Alextrician]

Are you testing at the back of the socket or using a socket tester adapter?

Check all terminations

Have you zero'd before every test?

Your allow 0.05 above and below your calculated reading (0.18)

Both mate nulled the leads more than one and still to no avail. Going to have to strip determinate and re test and see how things go

 

[westward10]

As per Doc I would say your reading is correct allowing for poor contact.

 

[Alextrician]

Dirty or unused sockets can give odd readings ...

But you are calculating it wrong ....

0.36 + 0.60 = 0.96 / 4 = 0.24

Thought it was. Watched a video because I got confused and that’s how he did it should’ve looked in the onsite guide

 

[gazdkw82]

Dirty or unused sockets can give odd readings ...

But you are calculating it wrong ....

0.36 + 0.60 = 0.96 / 4 = 0.24

Spot on. I didn't read the post very well

 

[Octopus]

Spot on. I didn't read the post very well

We’ve ALL done that

 

[Loki]

LL: 0.36
NN:0.36
EE:0.60(there abouts)

Now when I’m doing the r1+r2 crossing the opposite live and earths but the calculation for obtaining it isn’t what I’m getting when recording the results.

So 0.36+0.36/4= 0.18

But when testing at the sockets I’m getting readings of 0.30 ohms. I’m going to try another calibrated tester this weekend.

Hi,

I've noticed your figures your using are wrong. You say R1+R2 but have used R1 & Rn figures

Should be 0.36 + 0.6 / 4 = 0.24

Then your allowed the 0.05 tolerance


Edit

Beaten by Murdoch

 

[westward10]

You skip all the other posts

 

[MJPD29]

Alextrician is a good one I like it

 

[Loki]

You skip all the other posts

lol, Just slow at typing with my thumb on my phone

 

[gazdkw82]

Still isn't righr. Check terminations, check tester has sufficient battery, check you've zero'd properly.

 

[Strima]

I’d hazard a guess you might have nipped some insulation somewhere giving you a slightly higher resistance.

 

[Wilko]

I’d hazard a guess you might have nipped some insulation somewhere giving you a slightly higher resistance.

Could be on a roll here

 

[Strima]

Could be on a roll here

Cheese roll...

 

[AJshep]

Your talking about 0.06 ohms from the calculated rule of thumb.

Its really not a big deal.

 

[Octopus]

Cheese roll...

Bacon roll with ketchup ...