Conduit ring extension

[Fishyman]

Hi

Can anyone confirm or disprove the need to identify the two sets of legs at a socket when extending in singles. I'm sure I remember something about having to ensure you extend the right legs? I think it's somehow done by putting each leg to earth and testing at the board and identifying them by their resistances. Leccy school was such a long time ago!

cheers

 

[nickblake]

way to identify which are the legs is to split the ring and carry out an r1 r2 and then r1 rn test

 

[Stroppy]

Yes you have to extend / splice into the correct leg of the ring, otherwise you would get unequal lengths (and therefore resistances) of the Line, Neutral, and CPC, which I imagine would cause all sorts of weird problems with your RCD.

 

[Silly Sausage]

Yes you have to extend / splice into the correct leg of the ring, otherwise you would get unequal lengths (and therefore resistances) of the Line, Neutral, which I imagine would cause all sorts of weird problems with your RCD.

No it wouldn't create a problem for the RCD.

Draw it out and you'll see why!

 

[sparkymalarky]

Its called a ring for a reason

 

[Stroppy]

Cough cough cough. Oh dear, I really shouldn't post before I've had my breakfast gin....

 

[kingeri]

And think about lighting circuits where the line is always much longer than the neutral due to switch wires.

 

[Silly Sausage]

Cough cough cough. Oh dear, I really shouldn't post before I've had my breakfast gin....

Hahaha, know what you mean.
I wish there was a 'Delete Post' button, I could halve my post count easy!!!