Extractor fans that don't need a fuse

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SparkyChick

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• Nov 3, 2018

• #16

Thanks chaps, got some choices I'm liking the S&P/Envirovent ones. Guess I'll just have to skip the part in the instructions about having an isolator with 3mm contact gap... that would be the main switch in the CU

 

Andy78

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• Nov 3, 2018

• #17

Fused fan isolator if you need ......

Excel 3 Pole Fused Fan Isolator Switch - White | QVS Direct - https://www.qvsdirect.com/excel-3-pole-fused-fan-isolator-switch-white?gclid=Cj0KCQjwjvXeBRDDARIsAC38TP5ZRzR4QHnsjOkHbN-H4zGAlR_Lztn6jQwh60_k3q3bWmrIeq71GHkaAhbjEALw_wcB

 

happysteve

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• Nov 3, 2018

• #18

As Wilko's already said (just a bit more info): Vent-Axia Silhouette 100T (for timer model), model no 454055. Link to manufacturer's instructions:
https://www.vent-axia.com/sites/default/files/449631.pdf

Most of their other fans they do specify 3A fuses, but not this one.

 

Wilko

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• Nov 3, 2018

• #19

Andy78 said:

Hard to see but is the fuse soldered onto the pcb or is it replaceable ?

Click to expand...

Soldered in - I guess they're thinking if the internal fuse blows it's kaput

 

Wilko

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• Nov 3, 2018

• #20

SparkyChick said:

... Guess I'll just have to skip the part in the instructions about having an isolator with 3mm contact gap...

Click to expand...

Shouldn't be a problem, as fan isolators should meet this. Anything with the symbol nicely shown on the pic will be ok, so will plenty of others. It may be possible to find a 3 pole fan isolator for sale that doesn't meet the standards listed in Table 537.4 , but I hope not.

 

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• Nov 3, 2018

• #21

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

 

Ian1981

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• Nov 3, 2018

• #22

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TJ Anderson

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• Nov 4, 2018

• #23

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

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• Nov 4, 2018

• #24

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?

 

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• Nov 4, 2018

• #25

Wilko said:

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?

Click to expand...

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

 

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• Nov 4, 2018

• #26

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

 

a-z electrics

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• Nov 10, 2018

• #27

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

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• Nov 10, 2018

• #28

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..

 

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• Nov 10, 2018

• #29

a-z electrics said:

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..

Click to expand...

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

 

a-z electrics

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• Nov 10, 2018

• #30

Baddegg said:

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

Click to expand...

Probably right..