Extending cables behind FCU

[Jupiter01]

I have an FCU with very short lengths of supply cables and this will present an issue with replacing this FCU as it has a crack. Can you please advise on the recommended approach to extend these cables as there is no slack. Also, can I replace old cable colours with the new ones as I only have the new colours for the extension cables?

Finally, is there a guide on how much cable there should be behind the back of a socket to make maintenance easier?

Thanks in advance.

 

[thomp1983]

New colour cable matched up correctly is fine, I'd use crimp connectors for this but only if you have a proper tool to fit them

 

[sparkwright]

Connector blocks or wagos will do.

To get the wires the right length, I tend to strip the cable sheath back to the cable entry a far as I can (making sure the sheath does still fully enter the box.

Then fold cable to centre of box, bring towards you so level with the front of the box, add two inches, cut.

When stripping the wire ends, double over the wire end where only one wire is going to enter the terminal.

 

[Jupiter01]

I don’t own a crimping tool.
With wagos, which connector do you recommend for the extension scenario please?

 

[terryplumb]

I don’t own a crimping tool.
With wagos, which connector do you recommend for the extension scenario please?

How many cables are present ? Is the FCU part of a ring final circuit ?

 

[Jupiter01]

Yes part of a RFC. I have 9 cables in total. 6 for the 2 leg of the ring and 3 for the load

 

[terryplumb]

You are going to need quite a bit of space in the mounting box to accommodate all the connectors/ wagos. At least 5 of them. Do you have space ??

 

[winston1]

Yes part of a RFC. I have 9 cables in total. 6 for the 2 leg of the ring and 3 for the load

I think you mean 3 cables, 9 wires. Am I correct?

 

[Jupiter01]

I think you mean 3 cables, 9 wires. Am I correct?

Sorry, that’s exactly what I mean. It’s quite cosy behind there though and hence the need for a recommendation on which wago connectors I should use. Thanks

 

[Jupiter01]

Can I please have some suggestions on the type of wago connectors I should use in this situation?

 

[Taylortwocities]

Can I please have some suggestions on the type of wago connectors I should use in this situation?

Click me

 

[Jupiter01]

Wouldn’t it be the 2 way I need in this situation?

https://www.tlc-direct.co.uk/Products/WA412C.html

 

[333rocky333]

Wouldn’t it be the 2 way I need in this situation?

https://www.tlc-direct.co.uk/Products/WA412C.html

I would quess they are saying put the two ring cables together plus a short piece, of wire, hence 3.
If you want to lengthen every wire then yes you would need 2

 

[333rocky333]

I think you mean 3 cables, 9 wires. Am I correct?

Pretty obvious what he meant

 

[markyd1]

Sorry but i suggest you get somebody who knows what they are doing to do the job