Adding a humidistat fan at the end of a radial circuit.

[Flc1980]

Hi there, I’m in the process of having my basement tanked and want to add a few sockets and a humidistat fan (probs a monsoon).

It’s a radial circuit being set up down there. Can I add a fan to the end of this? I’ve added a diagram of my thoughts for reference.

Cheers for the help in advance.

 

[EFLImpudence]

We call that a spur; not a radial and yes you can do as you draw but -

what exactly is this arrangement?

 

[Flc1980]

Ok thanks for clearing up the term, apologies!

That would be a junction box.

I think I’m actually going to add the fan onto the lighting ring now anyway.

 

[EFLImpudence]

That would be a junction box.

Ok but why not use the FCU there and you can replace the removed socket.

I think I’m actually going to add the fan onto the lighting ring now anyway.

Fair enough.

The lighting circuit will (unless very unusual) be a radial; not a ring.

 

[Flc1980]

Ok but why not use the FCU there and you can replace the removed socket.

Haha I would be that’s been locked away behind a plastered ceiling before I realised. (I forgot I had this job to do before they came and did it yesterday, doh)

Thanks for your help!

 

[Murdochcat]

Haha I would be that’s been locked away behind a plastered ceiling before I realised. (I forgot I had this job to do before they came and did it yesterday, doh)

Thanks for your help!

remove the ceiling and do the job properly ?

 

[Flc1980]

remove the ceiling and do the job properly ?

That reply was a waste of calories.

I’m asking on here to see if I can do it properly without having to.

Just glad the replies I got on here first were constructive and helpful and didn’t make a first time poster feel like a fool.

 

[Murdochcat]

That reply was a waste of calories.

I’m asking on here to see if I can do it properly without having to.

Just glad the replies I got on here first were constructive and helpful and didn’t make a first time poster feel like a fool.

you are entitled to your misplaced views BUT the only way forward is to remove the ceiling. All accessories that are NOT MF compliant should be readily accessible

 

[Flc1980]

you are entitled to your misplaced views BUT the only way forward is to remove the ceiling. All accessories that are NOT MF compliant should be readily accessible

I dont have misplaced views. I don’t have any views, that’s why I’m on here looking for advice you troll

Your second sentence was actually of some use and if you just stuck to helping me with that information that would be great

 

[Murdochcat]

I dont have misplaced views. I don’t have any views, that’s why I’m on here looking for advice you troll

Your second sentence was actually of some use and if you just stuck to helping me with that information that would be great

yes you did “that reply was a waste of calories”

my advice is sound and just exposes your contractors as cost cutting cowboys …

 

[Flc1980]

So I basically can’t have a junction box in an inaccessible place, now I know that, I know I can’t do what I was wondering. Thats all I needed to know before allowing the builders to continue.

 

[Flc1980]

It was a waste of calories, because had you just explained ‘why’ it wasn’t being done properly, it would have really helped. Instead this thread just turned sour and meanspirited

 

[JohnW2]

All accessories that are NOT MF compliant should be readily accessible

That is, indeed, strictly true, particular i installed in fairly recent times (goodness only knows how many millions of inaccessible non-MF JBs are currently in service in the UK ).

However, given that the poor OP is being 'taken to task' in a somewhat abrupt manner, how is it that you can be absolutely certain that the JB in question is not 'MF' - I haven't noticed anyone telling us that.

Kind Regards, John

 

[Flc1980]

Thanks JW. I’m genuinely not sure if it is MF complaint. Had I of known this about JB’s it would have stuck out in my mind a bit more.

The builders also would have not questioned it as the other socket was already in place before they plastered.

They got to this job before I’d reminded myself of what I needed to do with the electrics, hence my predicament. I certainly don’t want to do anything against regs, regardless of the number of JB’s on floorboards across the uk right now haha.

I got a look at the JB the other week, it was a white circular one like this

https://www.screwfix.com/p/20a-4-terminal-junction-box-white/1239d

I suspect it’s not MF compliant?

Probs because from what I’ve now read, there’s a chance the screws could come loose, I don’t imagine the wires have been crimped etc. (It’s installed onto a wooden floor beam for the room above. It’s accessible via floorboards but this doesn’t seem to be in the spirit of ‘accessibility’.

If i have to open open the freshly done ceiling so be it only got myself to blame for getting distracted and not sorting before they plastered!

 

[JohnW2]

I got a look at the JB the other week, it was a white circular one like this https://www.screwfix.com/p/20a-4-terminal-junction-box-white/1239d I suspect it’s not MF compliant?

Your suspicion is (unfortunately) correct.

... from what I’ve now read, there’s a chance the screws could come loose,

That is the theoretical reason why non-accessible JBs are 'required' to be MF these days. However, as I implied, there are countless millions in service, many of which have been in-service for decade, whosw screws have not come loose - and, in any event, even when they are accessible, I seriously doubt that many people ever check the tightness of the terminal screws!

However, "regulations are regulations", and people's attitudes to that vary.

Kind Regards, John