Bathroom Extract Fan Query

[Newbie90]

Hi all,

Just a quick one.

Replacing an extract fan and installing a 12v one with transformer.

Does the fan require an isolator or can it be left without? If so, I will mount it in the loft next to the transformer.

Also, as it's only 12v on the load side of transformer, can it be wired in 1/1.5mm flex or is it best to stick to 1.5mm t&e?

Thanks

 

[telectrix]

isolator in the loft is fine. flex is best for the 12V to the fan. remember that the current @ 12V is 20 x what it is at 240V and select your flex size accordingly.

 

[D Skelton]

People who install SELV in houses without good reason are a bit silly IMHO

 

[Octopus]

Hi all,

Just a quick one.

Replacing an extract fan and installing a 12v one with transformer.

Does the fan require an isolator or can it be left without? If so, I will mount it in the loft next to the transformer.

Also, as it's only 12v on the load side of transformer, can it be wired in 1/1.5mm flex or is it best to stick to 1.5mm t&e?

Thanks

What do the manufacturers instructions say?

 

[Corpy76]

No need to install a 12v fan as fans and shower units are exempt from limitations in bathroom zones do just install a 230v instead less to go wrong!

 

[Corpy76]

If your just replacing on there is no need to install isolation however it would be better with.

 

[telectrix]

i have found that the 12V units, with the timer controls boxed with the tranny seem to be of better build quality and the one i've fitted are virtually silent. not like the 240V in line pig i've got in the shower room. sounds like the luftwaffe taking off to bomb britain.

 

[Lambretta phil]

No need to install a 12v fan as fans and shower units are exempt from limitations in bathroom zones do just install a 230v instead less to go wrong!

A building inspector told us he wanted the 230 v fan 2mts 30cm min height in a shower would he be correct.?

 

[telectrix]

he's talking through his arse. if it's in zone 1 it's OK as long as it's suitable for the environment. he's trying to get it fitted iout of zones because he's a plonker.

 

[Andy78]

As above. A 230V fan is fine in zone one as long as it is IPX4 at least. Wave section 701 at him and tell him to be quiet.

 

[HandySparks]

A building inspector told us he wanted the 230 v fan 2mts 30cm min height in a shower would he be correct.?

Just tell him you're going to fit the electric shower at that height as well.

 

[Lambretta phil]

As above. A 230V fan is fine in zone one as long as it is IPX4 at least. Wave section 701 at him and tell him to be quiet.

Thanks telectrix and Andy 78 maybe he knows as much as another building inspector who said we had only fitted a grill to the ceiling .when we had fitted an in line fan, he hadn't heard of those.

 

[Lambretta phil]

Just tell him you're going to fit the electric shower at that height as well.

haha like that

 

[telectrix]

well, that makes it easier to feed the fan from the shower, dunnit?