Wiring of a Japanese toilet and a dual-fuel radiator

[powernun]

Hi everyone,

I am planning to wire a Japanese toilet and a dual-fuel radiator in my bathroom.

My plan is to tap into the bedroom radial circuit to supply 2 switched FCUs: one for the Japanese toilet and one for the dual-fuel radiator. Both FCUs are in the bathroom but outside the zones.

There is also a ring final in the house for supplying all the other sockets, but I wanted to avoid tapping into it, as it is already serving most of the house. I figured using the bedroom radial would keep things more balanced (as it is barely utilised, only for hoovering really). The radial is also next to the bathroom so the wiring is easier.

I have created a wiring diagram. Is my plan sound? Feedback appreciated!

Diagram PNG (if this doesn't load properly, please see the attached PDF)

 

[EFLImpudence]

Looks fine - except the writing is too small. I cannot read what I assume are the cable sizes.

 

[powernun]

Looks fine - except the writing is too small. I cannot read what I assume are the cable sizes.

Yeah, I noticed that. It's very weird, locally opening the image has a nice high resolution, but the moment I add it to the forum, it is very low.

I'll see if I can fix it.

 

[powernun]

Looks fine - except the writing is too small. I cannot read what I assume are the cable sizes.

I can't figure out what's happening with the image; my suspicion is that the resolution is too high (even though the file size is small), so it's being automatically compressed by the forum when uploaded. I have uploaded a PDF version that appears to be unaffected and is clear.

In short, 2.5mm twin and earth used between the bedroom socket and the supply side of the FCUs in the bathroom. On the flex side, I will be using what the manufacturer provides, but based on their instructions for the fuse on the FCU, I assumed that for the toilet, it is 0.75mm 3-core flex and for the radiator, it is 1.5mm 3-core flex.

 

[EFLImpudence]

All good.