Dead tests on a ring final prior to energising

[newtothis]

Testing using a socket tester at the sockets gives me unexpected readings, based on little r calcs,
eg, outside allowed variance
Using the probes on the terminals gives me 'Texbook' readings expected from a new install.


Should I conclude the accessories are dodgy ?
They are DP double gang sockets costing £1.90 from TS

Thanks for any help, Please let me know if anything I've said that sounds stupid.
I'd rather know,,,, I have a thick skin

 

[Paul.M]

Have you carried out "end to end" r1, r2 & rn dead tests at the board/CU? That is where you should start.

 

[Richard Burns]

What sort of variance levels are they?
If you are talking 0.1Ω then switching the switch back and forth and taking the socket tester in and out of the socket a few times may help clean up the contacts. (I often think I need a plug with fine sandpaper on the pins for this purpose!)
If you are talking 1Ω then the sockets are probably rubbish.

 

[Pete999]

Testing using a socket tester at the sockets gives me unexpected readings, based on little r calcs,
eg, outside allowed variance
Using the probes on the terminals gives me 'Texbook' readings expected from a new install.


Should I conclude the accessories are dodgy ?
They are DP double gang sockets costing £1.90 from TS

Thanks for any help, Please let me know if anything I've said that sounds stupid.
I'd rather know,,,, I have a thick skin

https://www.youtube.com/watch?v=zSATFrqlSpg

 

[newtothis]

Have you carried out "end to end" r1, r2 & rn dead tests at the board/CU? That is where you should start.

Yes did that before I connected them to the CU did end to end on each one.
Then figure of eighted r1 + rn tested at every socket same with r1+r2.
did the calc r1+r2 /4 got 0.31

When I removed the socket covers every socket was 0.32 Ohms.

What sort of variance levels are they?
If you are talking 0.1Ω then switching the switch back and forth and taking the socket tester in and out of the socket a few times may help clean up the contacts. (I often think I need a plug with fine sandpaper on the pins for this purpose!)
If you are talking 1Ω then the sockets are probably rubbish.

when I went to the sockets they were from 0.31 to 0.70 Ohms
Rocked them about abit.

Sometimes I get confused by decimal fractions, is this the case here ?

https://www.youtube.com/watch?v=zSATFrqlSpg

Thanks I will revew that.

I carried out IR tests result both >999 for L-N & E-L and N-E 780 mega ohms
I am curious to know why N-E was lower but not too worried.