Hi all - I'm planning on installing a bathroom fan as described in the wiki at...
//wiki.diynot.com/electrics:lighting:fan
It's the circuit diagram below that I intend to use
The main difference is that I intend to use a 2 gang switch in the hall, instead of the DP pull switch in the bathroom.
My first questions is where can the SFCU be placed? For asthetic reasons my preference would be to place it in attic above the bathroom (where the junction box will be going). Is this ok? I appreciate that it isn't so easy to replace the fuse in this case...
The next option is to mount it on the wall near the fan (in zone 3). I assume this is ok - every office toilet seems to have one for the hand-dryer...
My next question is how is the earthing at the switch done? The diagram suggests that the switch is earthed on the feed side, but not on the fused fan side. In practice, I assume this would mean two T+E cables going to the switch, one of which earths and one of which doesn't. This makes sense given that the aim is to be able to isolate the earth on the fan side of the SFCU, but I just wanted to check my understanding. I have to admit, my understanding of an earth was that it was universal, but the circuit diagram suggests that when you turn off the SFCU the fan is no longer earthed...
Thanks
J
//wiki.diynot.com/electrics:lighting:fan
It's the circuit diagram below that I intend to use
The main difference is that I intend to use a 2 gang switch in the hall, instead of the DP pull switch in the bathroom.
My first questions is where can the SFCU be placed? For asthetic reasons my preference would be to place it in attic above the bathroom (where the junction box will be going). Is this ok? I appreciate that it isn't so easy to replace the fuse in this case...
The next option is to mount it on the wall near the fan (in zone 3). I assume this is ok - every office toilet seems to have one for the hand-dryer...
My next question is how is the earthing at the switch done? The diagram suggests that the switch is earthed on the feed side, but not on the fused fan side. In practice, I assume this would mean two T+E cables going to the switch, one of which earths and one of which doesn't. This makes sense given that the aim is to be able to isolate the earth on the fan side of the SFCU, but I just wanted to check my understanding. I have to admit, my understanding of an earth was that it was universal, but the circuit diagram suggests that when you turn off the SFCU the fan is no longer earthed...
Thanks
J