Wiring thermostat hub with boiler

[collapse-sued-turkey]

I am looking to wire my combi boiler with a Drayton Wiser thermostat. As part of this, I am also looking to make the following improvements to the current wiring:

• Replace the boiler's twin and earth with 3-core flex, as twin and earth is not compliant for high vibration and heat areas
• Replace the 13A boiler plug with a 3A FCU wired into the ring (not a spur) as it's the more common way to do it, and 13A is way over what it needs to be for the boiler (pretty sure that is also not compliant or following manufacturer instructions)
• Replace the 2x 1-gang sockets with 1x 2-gang socket (part of the ring as well)

The first picture is a diagram of the current wiring and the second a diagram of the new wiring I am planning to do. I am also feeling quite competent in doing this.

Current Wiring

New Wiring

Anything I have missed?

 

[EFLImpudence]

13A boiler plug with a 3A FCU wired into the ring (not a spur) as it's the more common way to do it, and 13A is way over what it needs to be for the boiler

Put a 3A fuse in the plug, then.

 

[collapse-sued-turkey]

Put a 3A fuse in the plug, then.

The gas engineer that came around told me that when they will replace the boiler (it's a very old one and it was getting serviced) they would fit a 3A FCU so I figured I might as well do it now to have it ready for the future. Also I need both gangs of the new socket free for other appliances.

 

[EFLImpudence]

The gas engineer that came around told me that when they will replace the boiler (it's a very old one and it was getting serviced) they would fit a 3A FCU

There is no reason to do that.
A plug is better in one way in that you can completely disconnect (isolate) the heating circuit by pulling out the plug.

Also I need both gangs of the new socket free for other appliances.

That doesn't make sense either - fit another socket instead of the FCU.

 

[CountryFan]

There is no reason to do that.
A plug is better in one way in that you can completely disconnect (isolate) the heating circuit by pulling out the plug.

That doesn't make sense either - fit another socket instead of the FCU.

Can I ask, are you against fcu’s or do you prefer sockets?

 

[EFLImpudence]

Neither, I am just pointing out the lack of reasoning in your proposals.

 

[CountryFan]

Neither, I am just pointing out the lack of reasoning in your proposals.

Well, the OP’s (@collapse-sued-turkey) not mine.

 

[EFLImpudence]

Oh sorry.