Extractor fans that don't need a fuse

[SparkyChick]

Thanks Wilko (and Andy) for linking the fan isolators... as I say, I'm trying to avoid any changes to the fixed wiring.

 

[Ian1981]

Deleted post

 

[TJ Anderson]

Excel 3 Pole Fused Fan Isolator Switch - White | QVS Direct - https://www.qvsdirect.com/excel-3-pole-fused-fan-isolator-switch-white?gclid=EAIaIQobChMIs42W2qy63gIVbrHtCh1NNAKuEAQYASABEgIzvvD_BwE

I see you can get these.

Problem is though, the fuse is only going to be in series with one switch pole. So, unless im missing something, only one of the line conductors will be fused (switched or permanent), the other will still only be be covered by circuit mcb only.

 

[Wilko]

Hi TJ - these are made as 2 separate units, so you can bring unswitched L to the fuse then take Lfused to the fan (via one isolator pole), another Lfused to the light switch and back to fan (via next isolator pole) to give Ls and N (via 3rd pole) as usual. Ha - where's a good drawing?

 

[TJ Anderson]

Hi TJ - these are made as 2 separate units, so you can bring unswitched L to the fuse then take Lfused to the fan (via one isolator pole), another Lfused to the light switch and back to fan (via next isolator pole) to give Ls and N (via 3rd pole) as usual. Ha - where's a good drawing?

Ah...I see . Only good for new install then or otherwise making wiring changes to accommodate it.

 

[Wilko]

Yes, it's a bit of a fuss. I'd rather find the right fan

 

[a-z electrics]

I know they're pricier but S& P are good fans. Quiet and superior extraction on 4 inch vent. 5 inch ones not cost much more for twice the extraction rate too..
I always tend to fit these as first choice now..

 

[a-z electrics]

Another thing is you can get a fuse incorporated with the 3 pole switch too. A lot neater and cheaper thsn fitting an ectra fcu. Click do them..

 

[Baddegg]

Another thing is you can get a fuse incorporated with the 3 pole switch too. A lot neater and cheaper thsn fitting an ectra fcu. Click do them..

Thinks those only fuse the permanent line though?......

 

[a-z electrics]

Thinks those only fuse the permanent line though?......

Probably right..

 

[ipf]

Thinks those only fuse the permanent line though?......

Is that correct? I don't know.
I may be wrong but, without testing, something tells me it could be dangerous......the fan doesn't run on yet the unit is still live with the switch in 'on' position.
In other words, the fuse isn't fully isolating the unit.

 

[richy3333]

No, if switched off the there is nothing live on the fan/load supply side, just like a DP switch. Only line is fused and isolated by the switch when you wire one - as per the diagram manufacturers usually supply with their fan instructions