uksparks
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Hi,
I have a question I would like to put to you to see who does what really.
The majority if not all manufacturers state something about the fan must be fused down to 3A...
Ok, scenario...
You have a bathroom, 6A light circuit, the light can either be switched at pull cord, light switch outside or the light fitting.
The customer says they want an extractor fan with Timer.
Option One
Do you just fit a fan in the ceiling / wall, and connect it off the light circuit straight to it and think nothing of it? This would be a permanent live supply and switched live.
Option Two
Do you fit a fan, and put a 3A fuse on the permanent live only? Leaving the switched live on 6A, also leaving the fan with the possibility of a blown fuse scenario but also having a live supply to it. You also fit a 3 pole fan isolator.
Option Three
Do you fit a fan, and put a 3A fuse on the permanent live supply to the light, then use that for the live for the fan, and the switched side of the light for the switched live etc. You also fit a 3 pole fan isolator.
Just to add to this
On top of these three options, lets say this is downstairs, no loft space etc, brick walls. You need to put a 3 pole isolator somewhere, where do you put it? Do you surface mount it in a box? Do you use a 3 pole pull switch on the ceiling? But hang on, where do you then put the 3A fuse? Do you not bother? Do you put in on the surface or ceiling?
Just wondering what others do as have been having this conversation with a couple of people. I also rang Manrose about this about putting a 3A fuse across the switched live too, they said, although preferable, it only really needs it on the permanent live.
I have a question I would like to put to you to see who does what really.
The majority if not all manufacturers state something about the fan must be fused down to 3A...
Ok, scenario...
You have a bathroom, 6A light circuit, the light can either be switched at pull cord, light switch outside or the light fitting.
The customer says they want an extractor fan with Timer.
Option One
Do you just fit a fan in the ceiling / wall, and connect it off the light circuit straight to it and think nothing of it? This would be a permanent live supply and switched live.
Option Two
Do you fit a fan, and put a 3A fuse on the permanent live only? Leaving the switched live on 6A, also leaving the fan with the possibility of a blown fuse scenario but also having a live supply to it. You also fit a 3 pole fan isolator.
Option Three
Do you fit a fan, and put a 3A fuse on the permanent live supply to the light, then use that for the live for the fan, and the switched side of the light for the switched live etc. You also fit a 3 pole fan isolator.
Just to add to this
On top of these three options, lets say this is downstairs, no loft space etc, brick walls. You need to put a 3 pole isolator somewhere, where do you put it? Do you surface mount it in a box? Do you use a 3 pole pull switch on the ceiling? But hang on, where do you then put the 3A fuse? Do you not bother? Do you put in on the surface or ceiling?
Just wondering what others do as have been having this conversation with a couple of people. I also rang Manrose about this about putting a 3A fuse across the switched live too, they said, although preferable, it only really needs it on the permanent live.