Fusing Fans to manufacturers spec

[nickblake]

Well chaps ive been looking at the manufacturer requirements for fusing down fans ,an every one appears to require only the permernant live to be fused so having words with those nice people at scolmore click you can do it easily with the grid range that doesnt actually look like grid fuse and an isolator in the same switch brilliant thats what i say good old Click scholmore

 

[telectrix]

looks tidy.

 

[Strima]

Like that, saves messing around wiring in two different items.

 

[Octopus]

How much?

 

[telectrix]

probably less than a separate isol. and FCU when you factor in 2 back boxes, never mind the extra cutting out and time running cable.

 

[Octopus]

probably less than a separate isol. and FCU when you factor in 2 back boxes, never mind the extra cutting out and time running cable.

Quite agree, still like to know!

 

[Amp David]

How much?

I get those isolators for about 2 quid, the faceplate for about 90p and a fused unit is around 1.50.

Never thought of doing that and been using the Click mini grid for a while now.

Nice one

 

[Dcf]

The click stuff is one of the best thought out at the moment.
i like their grid stuff as well.even on normal plates you can swap a 2way for an intermediate easily.

 

[Octopus]

I get those isolators for about 2 quid, the faceplate for about 90p and a fused unit is around 1.50.

Never thought of doing that and been using the Click mini grid for a while now.

Nice one

This may sound a silly question but how to you wire it if you're using a fan with an over run timer?

 

[telectrix]

as i see it, it's a 3 pole isolator with a fuse in the permanent L.

 

[Amp David]

This may sound a silly question but how to you wire it if you're using a fan with an over run timer?

Perm feed through fuse, into isolator then out to fan. Neutral and switched into the out of isolator.

 

[nickblake]

This may sound a silly question but how to you wire it if you're using a fan with an over run timer?

According to the manufacturers instructions i have read you only need to fuse down the permernant feed and not the switch feed , so ideal in my mind ill let you know the cost

 

[topquark]

According to the manufacturers instructions i have read you only need to fuse down the permernant feed and not the switch feed , so ideal in my mind ill let you know the cost

Yep, perm live only on the ones I've seen. I've also noticed that the rule about fusing it only applies to the UK! Anyone know why we're blessed with that requirement here and no one else is?

 

[kingeri]

It is a bit strange, as the whole circuit is protected at 6a. That isolator with integrated fuse on the perm live is a simple but great idea, as said saves the hassle of having to use two accessories. Why does the perm live need fusing down but not the switched live?

 

[topquark]

It is a bit strange, as the whole circuit is protected at 6a. That isolator with integrated fuse on the perm live is a simple but great idea, as said saves the hassle of having to use two accessories. Why does the perm live need fusing down but not the switched live?

They're both fused because of the way it's suggested to be fed (via the perm live). If no other countries need to add protection, then why do we? I don't believe other countries lighting is 3A to start with. I wonder if it's a misunderstanding that has been propogated across the chinese manuf plants.

 

[Strima]

Not enough 3A fuses were being sold, its a conspiracy I tell ya!!!

If they insist on 3A protection why not just provide them with one installed? Or am I thinking too much?

 

[topquark]

Not enough 3A fuses were being sold, its a conspiracy I tell ya!!!

If they insist on 3A protection why not just provide them with one installed? Or am I thinking too much?

That's the point mate, they don't ask any other country to add a fuse (so it must be OK without that protection?).

 

[telectrix]

so why don't we all bombard manrose and the like with emails asking why?

 

[Richard Burns]

Not enough 3A fuses were being sold, its a conspiracy I tell ya!!!

If they insist on 3A protection why not just provide them with one installed? Or am I thinking too much?

If you installed a fuse in the fan then only one of the SL or L would be fused, if you installed two fuses one in each Line then one fuse could go and still leave a live circuit on the fan. You want the fuse before the isolator. As per post #1

 

[telectrix]

but the whole point of the post is that the manufacturers instructions only call for the permanent L to be fused.......is that a mistake on their part?

 

[Richard Burns]

No the instructions ask for the permanent line to be fused before the split to permanent and switched so not at the fan.

 

[Strima]

I can see both sides for the fusing of both lines. Was the fuse brought in due to motors burning out and causing fires? If that's the case then only the perm L needs fusing as the SL is only a signal to the PCB as any fault should cause overload on the perm L. Or is my logic way out? Ideally what is needed is a three pole fused switch.

 

[Richard Burns]

Engage brain and read thread before posting!! I see what you say about the permanent line fusing I hadn't actually thought about the arrangement above and now realise it is only fusing one part of the circuit and not the whole lot.
Sorry.

 

[topquark]

Like so:

 

[telectrix]

o bugger. just open the bloody window and fart.

 

[nickblake]

I can see both sides for the fusing of both lines. Was the fuse brought in due to motors burning out and causing fires? If that's the case then only the perm L needs fusing as the SL is only a signal to the PCB as any fault should cause overload on the perm L. Or is my logic way out? Ideally what is needed is a three pole fused switch.

Exactly the reason , there were a spate of fire including one hotel in london where some people died as a resault the electrician was prossecuted and if im not mistaken charged with unlawfull killing due to the fact that he had not followed manufacturers instructions

 

[Octopus]

What I've noticed is that on the last 2 fans I've installed not only do they both call for 3A fuses but they also state that "isolation" is also required - so even if the doubters here say they aren't going to bother with 3A fuses will they bother with isolators too?

 

[Strima]

Always stick an isolator in when doing a new fan, makes it easier for testing and working on and fans annoy me when I go for a gush at three in the morning and it wants to runs on for twenty minutes hence I give the customer the option of where they want it... :lol:

 

[nickblake]

Always stick an isolator in when doing a new fan, makes it easier for testing and working on and fans annoy me when I go for a gush at three in the morning and it wants to runs on for twenty minutes hence I give the customer the option of where they want it... :lol:

i have 2 fan isolators to install i will now be using the click fuse with isolators for those intrested in the isolators in the pick order codes for the parts are MD020WH fan isolator MD220WH locable version MD047PW fuse module and PRW403 for the face plate these also come in a full range silver brass chrome etc blimby i sound like an advert lol

 

[Strima]

They do look nice and will bear them in mind.