Socket figure of 8 !!!!

[tester11]

Alright folks doing condition report and I have a ring circuit which on the figure of 8 test I am getting 0.17 at the db and at half the sockets on the ring, when I get to the furthest out room on the ring my reading jumps to 0.39 at about 8 sockets any ideas why this would be ??

 

[Brightspark2]

There 'spurred' off from the ring?...

 

[telectrix]

check if these sockets that give the high readings are additions. DIY dave strikes again.

 

[tester11]

Doesn't seem to be any spurs,had all sockets off each has 2 cables at it plus the value isn't increasing as I go round the sockets there just all at 0.39.

 

[telectrix]

could be that these 8 sockets are spurred off using a JB under the floor.

 

[Farmelectrics]

What are you getting this on the phase conductor neutrals or cpcs more info please

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Good shout tel

 

[Octopus]

You never get these problems with £30.00 drive by inspections. lol

 

[tester11]

It's on the figure of 8 test between live and earth, done end to ends on the cables which all come out fine at 0.26 0.26 and 0.41 for earth. just checked nic testing book which does say these values will differ at different points I always thought they should be the same throughout. If it was a joint under the floor would the values not increase as I went from skt to skt tho ?? Gonna do zs at each of them and see what value that's giving me.

 

[Rampantchilli]

Could it be a ring on ring? Ie someone extended for additional sockets but wired a ring to a single jb,I've seen that before so the ring becomes more a figure of 8 than a 0

 

[Rampantchilli]

Have also seen a ring wired for a big house, every socket was taken from the ring as a spur, but both legs of the ring went into the jb, that's on EVERY socket, end to end readings were in the region of 0.02 in a 5 bedroom Victorian house! That confused me.

 

[SirKit Breaker]

Alright folks doing condition report and I have a ring circuit which on the figure of 8 test I am getting 0.17 at the db and at half the sockets on the ring, when I get to the furthest out room on the ring my reading jumps to 0.39 at about 8 sockets any ideas why this would be ??

Your 0.17 is fine for your R1+R2 value based on your r1 and r2 readings, so the sockets giving you 0.17 are a ring.
The other eight sockets have double"ish" your R1+R2 value and they are consistent, sounds like a figure of eight, as this would double your reading at the farthest eight sockets, and you would expect consistent reading which you have. Your original r1, rn and r2 will be fine when you measure them, because you will measure the path of least resistance (the original ring).

Cheers...........Howard

 

[Farmelectrics]

Wouldn't spend to much time looking though test meter doesn't lie record results make note on your test sheets if you want

 

[Amp David]

Wouldn't spend to much time looking though test meter doesn't lie record results make note on your test sheets if you want

Me neither, you've identified the issue, code it and tick FIR.

You might get the remedial work

 

[Octopus]

Me neither, you've identified the issue, code it and tick FIR.

You might get the remedial work

Which is a very relevent point. Sure double check your readings, but if the work involved is an EICR the record it and move on!

 

[Chr!s]

Carp sockets, at one of the .39 sockets, remove socket and test direct are you still getting .39 ?