Confirming Socket is Part of a Ring

[chalkmycue]

Hello

I am planning to add a socket to an existing ring circuit i have looked at the wiring and it has two line and two neutral going in to it, the wiring goes straight down in to a concrete floor so i am unable to trace the wires.

Everything would appear to prove that it is part of the main ring, but i wanted to be certain that it isnt two spurs as i have found some strange wiring within the house already.

Thanks Ricky

 

[SparkyNinja]

Test the end-to-end resistance of the conductors.

Are you an electrician, or do you need more info?

 

[safesinbad]

you will need a multimeter to prove this accurately. fisrtly, isolate the circuit, then:-

put one of the prongs onto 1 live and the other prong onto the other live,
do the same for the neutrals and the cpc's(earth)

you should have a low resistance between these conductors

if not you have no ring main

if the wiring is already dodgy don't touch it, get a sparky to have a look.

 

[chalkmycue]

Thanks for your reply widdler.
I am a novice

Would i be right in thinking that i remove the wires from the MCB Connect the Lines to the oposite Neutrals and then measure the resistance at each socket outlet the reading from the main ring will be very similar and if any of the sockets are spurred will have a higher resistance reading.

Have i read this right?

Thanks Ricky

 

[ban-all-sheds]

if not you have no ring main.

If you do, then you have a ring final.

Or a bridged ring.

Or a radial with a loop on it.

Or a branch from a radial cabled with parallel conductors.

 

[SparkyNinja]

Thanks for your reply widdler.
I am a novice

Would i be right in thinking that i remove the wires from the MCB Connect the Lines to the oposite Neutrals and then measure the resistance at each socket outlet the reading from the main ring will be very similar and if any of the sockets are spurred will have a higher resistance reading.

Have i read this right?

Thanks Ricky

Theoretically yes, but as BAS has just pointed out, you can get a few other possibilities.

If it were me I would isolate the circuit, remove every socket and then test all the individual legs so you can be confident in the exact routing of your circuit. You will gradually workout wether some sockets are spured off also in this method.