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

 

[somersetsparks]

I believe only the permanent live needs fusing as the switch live just 'switches' the actual fan motor only ever runs off of the permanent live. They don't really care about the fuse blowing and leaving a permanent feed at the fan.
Saying that though, I have yet to see a fused fan in a house.

 

[nickblake]

I believe only the permanent live needs fusing as the switch live just 'switches' the actual fan motor only ever runs off of the permanent live. They don't really care about the fuse blowing and leaving a permanent feed at the fan.
Saying that though, I have yet to see a fused fan in a house.

suprising isnt it i always put them in well since ive worked for myself

 

[somersetsparks]

Indeed, even stranger that they only have to have them in the uk, I think it may be a misinterpretation by the manufacturers somewhere along the line, lazy b*ggers should just put a little 1361 carrier in the fan itself !

 

[Doomed]

I believe only the permanent live needs fusing as the switch live just 'switches' the actual fan motor only ever runs off of the permanent live. They don't really care about the fuse blowing and leaving a permanent feed at the fan.
Saying that though, I have yet to see a fused fan in a house.

Come and look at some of the houses in Dorset then.

 

[somersetsparks]

Come and look at some of the houses in Dorset then.

Might well do, not to far from somerset, see thing is there a bit posher over your way!

 

[Guest111]

Looking at fig 4 on that drawing it appears to be based on a seperate switch for the fan as you have L and N coming in with a fuse in the live then it splits and a perm live goes to fan and one goes through the switch,obviously someone has very little knowledge of how fans are wired over here i.e switched with light.typical manufacturer type of thing really .

 

[kingeri]

Sorry to re-open this one, but just wanted to confirm something. I've always believed that when the instructions state that only the perm line needs fusing at 3amps, then this means at the fan, hence the switched line is not fused. To fuse it to encompass both with one fuse would surely mean fusing the bathroom lights at 3amps as well. Seeing as the click accessory has only one fuse, I take it I am correct in assuming that perm live is referring only to the actual perm live feed to the fan? Sorry to be a bore.

 

[Deleted member 19807]

could someone let me know which makes of timed fan only require the perm Line to be fused as all the ones i fit are the same as in post 24 that shows both perm and switched needing fusing. Would be nice to not have to put the light on the fuse as well.

 

[yellowvanman]

could someone let me know which makes of timed fan only require the perm Line to be fused as all the ones i fit are the same as in post 24 that shows both perm and switched needing fusing. Would be nice to not have to put the light on the fuse as well.

Try making the fan work with just the switched live and neutral!

I assume the perm line actually feeds the motor etc. and makes the switched live useless if not present.

 

[Deleted member 19807]

Try making the fan work with just the switched live and neutral!

I assume the perm line actually feeds the motor etc. and makes the switched live useless if not present.

that won't work with a timed fan, you need both perm and switched.

 

[cbw]

Too many ciders again!

 

[sjm]

If you fit Vortice or Solar & Pallau fans the manufacturers instuctions only require a "multipole switch for isolation" so makes the whole fusing down argument redundant.

All manufacturers instructions I've seen require the fuse to be in the line BEFORE the split for the switched live.
So IMHO although the original post looks good I don't think it would hold water in a court of law IF anything went wrong, and surely thats the reason we bend over backwards to follow nonsensical regs and manufacturers instructions.

 

[Deleted member 19807]

Too many ciders again!

not yet but i'm working on it

 

[kingeri]

If you fit Vortice or Solar & Pallau fans the manufacturers instuctions only require a "multipole switch for isolation" so makes the whole fusing down argument redundant.

All manufacturers instructions I've seen require the fuse to be in the line BEFORE the split for the switched live.
So IMHO although the original post looks good I don't think it would hold water in a court of law IF anything went wrong, and surely thats the reason we bend over backwards to follow nonsensical regs and manufacturers instructions.

I've seen plenty of one-sheet poor-English instructions that state only something like 'Permanent Line must be fused down at 3amps'.

 

[kingeri]

To be safe I think I'll start fusing the whole bathroom lighting at 3a then no-one can send me to jail for anything...