Initial fault was RCD tripping, narrowed down to a ring final cct.
IR tests on that cct with all loads removed were showing almost zero between neutral and cpc.
So I broke the ring apart and eventually found the nail through a cable, and got that all sorted.
Now its testing ok in as much as...
Evening all
Pricing a bungalow that has 300mm insulation in the roof, as im going to be wiring around the corenrs as much as i can and through the middle would you use 4mm on the ring final circuits?
I want to use 2.5mm radials for bedrooms and living room but my boss is old school and wants...
Just checking, what I think I already believe.
Doing a pre-install test of some outdoor sockets on a ring final. So far, confirmed bonding, incoming polarity, Ze and Pfc and RCD Test on circuit, everything fine and within regs.
However on testing Ring Final, Line came out fine (0.7), Neutral...
Afternoon all,
A quick EICR question. I have found a Ring Final Circuit that has been run in 1.5/1mm twin and earth. It is RCD protected and OCPD is a 16a type B MCB. All testing has come back as expected for a Ring final that has been installed in 1.5/1mm and the measured Zs is well within max...
Might be trivial question. My understanding is that we test on either leg of the ring since both legs make up a radial, but some say they test both legs at once, i.e. LL to NN, it would make sense if the other leg is not insulated since this is a live test, but I don't see why not if the other...
Morning All,
Currently carrying out an EICR and going through ring final steps with the following readings:
r1: 0.31ohm
rn: 0.32ohm
r2: 0.03ohm
Started taking sockets faces off to find that there is no cpc, only fly lead to metal patress box and steel conduit trunking. (See photo)
When i...
Done a condition report on a old mains board, everything good apart from ring final, got 0.55 nn 33.7ll and 3.8 on ee, changed board to main switch and rcbos, carried out a full accessory swap on all sockets and fuse spares in house, found some bad practice, twisted lives, n and earth's, no...
Hi,
Extending a ring final circuit off a socket in the kitchen through the wall into the shed on the other side. I already have 7 core NYYJ 2.5mm cable and I was wondering if I could use that to go through the wall to a J/B then connect to singles in conduit which would add about 4 meters in...
Hi there,
I'm just trying to get myself into cable calc and my first hurdle is demand and diversity. I understand the majority of what is coming across in tables A1 and A2 OSG but I'm just struggling to clearly understand what I should be using for demand on a domestic 32amp ring final...
Hi, Im new to fault finding, Im on a job where there is no live to live continuity on the ring final circuit which supplys the sockets to the whole house, with new flooring recently installed I cant access the floors, im assuming there are many jbs because its a 1960s property, if I connect one...
Hi, I've sat my am2 practical today.
I have a question about the ring final circuit hopefully there is someone who can relate.
Is it crucial to wire the ring final a certain way? Ive bought 2 legs out, one goes into my closest socket which went down a bit of conduit and the other leg goes to...
I need to install some extra sockets in a kitchen. It's a single story ex-commercial kitchen. All the wiring is in singles in steel trunking in the loft space, with drops through steel conduit to the various sockets and switches.
I want to install an additional 6 sockets under the worktop for...
Hi. I have a CU move to do - around 5m from current location. There are 10 circuits, 4 of them ring finals.
I'm considering whether to extend the rings 'as are', or to split the rings somewhere in their approximate middles and extend them to separate RCBOs as radials, the aim being to reduce...
Hi all,
I would like to ask you about ring final circuit canductors and schedule of test results.
I have got dedicated ring circuit to supply kitchen appliances. Circuit is protected by mcb tybe B 32A. Then supply is split into radial circuits to supply appliances by switched 13A FCUs. What...
Hi all
I have just moved in and am in the process of adding some sockets. Am I right in saying that I can add to the circuit regardless of which type of circuit it is as the MCB is a 20a, obviously as long as I'm using 2.5mm t+e not speaker wire etc. I get the issues with RFC where 32a fuse...
Hi All,
A customer has asked for a shaver socket to be installed in his bathroom.
The only issue is that there is no lighting circuit available (loft conversion above and no access to the eaves).
His idea was to come off a socket in a bedroom on the other side of a stud wall to the proposed...
Morning fellas. I know from regular visits to this website that we have some rather intuitive Sparkie’s on here so I thought I’d join in the fun.
I’ve got a rather basic question to start with but also where some of you can hopefully show your tips and tricks.
Im currently working on a...
Hi...keen amateur here......don't crucify me for asking!! I understand Ohm's law and I understand the mechanics of measuring end to end on ring final and then joining incoming live to outgoing neutral etc, and I know that this configuration gives a figure of 8 (in fact can be straightened to...
HI everyone,
Is it acceptable to wire a hand dryer from a ring final in to a 13 amp FCU. The ring main in question has 30MA RCD protection.
Or, is it best to wire a new radial circuit for it??
There is a socket I can spur off that is easy to get to.
Thanks
Hi All,
Just looking for some reassurance on a job I've looked at today. My status is that I am trying to stay within the realms of 'Minor Works' until I get a bit of experience under my belt. Conscientious decision - but everywhere I go it seems that notifiable work is needed as well...
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