No switched live to boiler?

[SJB060685]

@Murdoch can you explain to him the requirements in this case. My understanding is any wires or links should be of suitable size and insulated. If not then I can see potential arching, which would obviously cause things to trip as well as potential fire hazards.

 

[CheshireH]

@Murdoch can ypu explain to him the requirements in this case. My understanding is any wires or links should be of suitable size and insulated. If not then I can see potential arching, which would obviously cause things to trip as well as potential fire hazards.

I would appreciate this. The wiring centre which I purchased is a Danfoss WC4B which is purpose made for S/Y-Plan wiring, and the small clips in the neutral and earth blocks came pre-installed.
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These are the paper clip style connectors I am referring too. I managed to get the insulated ferrules in on this example using the old wiring centre, but I was struggling in the mix of all cables to fit them in. Could try again if the paper style clips are ok to use, otherwise I could use the double entry ferrules (example on right) to add little 1mm wire connectors between the terminals?

 

[SJB060685]

Those links are supplied with the wiring centre and are already in place for how the wiring should be done. They are ok but all other wires should be insulated.

 

[CheshireH]

Those links are supplied with the wiring centre and are already in place for how the wiring should be done. They are ok but all other wires should be insulated.

All wires are insulated and fitted with insulated ferrrules. Links between Live terminals are made with 1.5mm insulated links. It is just the earths and neutrals that are fitted without ferrules, alongside the 'clip links'.

 

[Murdoch]

My advice is to stop meddling and pay somebody ........

 

[CheshireH]

My advice is to stop meddling and pay somebody .

I started 'meddling' because I paid somebody who fed two live feeds into the wiring centre that were not isolated by the boiler switch, left the messiest of wiring centres and did not include a switched live to the boiler. I appreciate the advice not to take risks with electricity, but I do find it very helpful to understand what is going on, even if I then ask somebody to implement. Thanks for all the help so far!

 

[CheshireH]

Just wanted to report that things are now working fine. I rewired everything, adding another neutral and another earth connector block linked to the existing ones, so that no wires are doubled up on any earth or neutral connector. All wire ends are now terminated in isolated ferrules. I tightened all connections carefully. I checked for the correct signal on the switched live with a multimeter, before connecting switched live to the boiler.

The problem on the last step must have had to do with a poor connection. I read up a lot on possible issues, but I simply cannot explain my scenario: It all worked fine, I then did nothing else than adding a new boiler cable with switched live included, it started off fine until suddenly all components stopped. There was no issue with the power supply from the mains. Same scenario again twice after - starting up fine then switching off all components. Eventually, even removing the boiler live did not fix it. I ended up removing the boiler cables altogether, and then connected them again without the switched live. I do not think however that the addition of the switched live was in any way relevant, as it works fine now in exactly the same wiring constellation.

If anybody has any further input on what kind of poor connection and scenario could have caused this failure, it would certainly make me feel much better, and might help others who may read this thread in the future!

Thanks again for all the advice. Fingers crossed, but it looks as if I now have a safer set-up, with no more external live feeds that are not isolated by the boiler switch coming into the wiring centre from programmer and UFH controller, plus the addition of wireless switching of all components!

 

[Ben-gee]

A common one is that you insert a wire slightly too far and do up the terminal screw on the insulation/bare metal border - this causes intermittent faults...