Discuss Is this design exceptable for a Bathroom fan extractor. in the Electrical Forum area at ElectriciansForums.net

brianmoooore

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It's electrically OK, but it would be better to eliminate the junction box and take the feeds for the fan and the light back to the 3A switch/fuse.
There's no switch for the fan, so I take it that it's an automatic one with a humidistat?
You've labelled the pull cord "3 pole isolator". It's single pole and not an isolator with the wiring you show.. It's a switch
 
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Dartlec

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I assume the feed is coming in from the FCU at the top right? Is the fan an on/off or a timed one? If timed you will want to be sure the switched and permanent live run to the fan.

If this is a bathroom, presumably that's not a standard ceiling rose but a suitable bathroom light?
 

Tonykakz

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I assume the feed is coming in from the FCU at the top right? Is the fan an on/off or a timed one? If timed you will want to be sure the switched and permanent live run to the fan.

If this is a bathroom, presumably that's not a standard ceiling rose but a suitable bathroom light?
Hi! Thanks . Would you be able to post an a design pic of what you are saying i should follow. Thanks for your time and help.
 

Tonykakz

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I assume the feed is coming in from the FCU at the top right? Is the fan an on/off or a timed one? If timed you will want to be sure the switched and permanent live run to the fan.

If this is a bathroom, presumably that's not a standard ceiling rose but a suitable bathroom light?
Whats confusing is the manufacturers demanding a FCU be fitted. Currantly the old fan runs on a light circuit with no FCU and islolator. I was going to just fit a 3 pole isolator at the pull cord. But if it requires a FCU i will need to redesign and incorporate the FCU. Thanks for your time and help.
 

Tonykakz

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It's electrically OK, but it would be better to eliminate the junction box and take the feeds for the fan and the light back to the 3A switch/fuse.
There's no switch for the fan, so I take it that it's an automatic one with a humidistat?
You've labelled the pull cord "3 pole isolator". It's single pole and not an isolator with the wiring you show.. It's a switch
Is this what you mean i should follow.
 

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DefyG

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A 3pole fan isolator could be used in place of the junction box to enable all poles to be isolated (it does what says on the tin!
The intermediate 3 pole isolator 'junction' would not be needed.
 

brianmoooore

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Is this what you mean i should follow.
As long as the 'fuse' also incorporates a DP switch (i.e. an ordinary switched fused connection unit), and is placed either inside the bathroom, (outside of the zones), or preferably, immediately outside of the bathroom door the triple pole isolator is not needed.
This circuit does not actually have a light included.
 

Tonykakz

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As long as the 'fuse' also incorporates a DP switch (i.e. an ordinary switched fused connection unit), and is placed either inside the bathroom, (outside of the zones), or preferably, immediately outside of the bathroom door the triple pole isolator is not needed.
This circuit does not actually have a light included.
Yes this circuit is from thr mains power and is not powered by lighting circuit . Thanks .
 

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