I am looking to replace a previous in-line extractor fan; located in my loft however, it was clearly fitted by a cowboy DIYer before as there is only 2 core and earth.
The problem arises with the wiring as the fan requires a switch live but there isn't one as the pull cord has a live, neutral and earth for both feed and source. The feed comes from the main fuse box and the source being the bathroom downlights.
There is a 3 pole isolator switch located on the wall outside of the bathroom which I have fitted a 3 core and earth from to the extractor fan, however, the manufacturer instructions state a 3AMP FCU is required???
It is causing some confusion as to how to wire this new extractor fan with timer into the lighting circuit. I am looking to locate the FCU with neon in the loft next to the extractor fan unit. How do I get a switch live for the extractor fan, FCU & isolator switch??
There is no ceiling rose for the bathroom lighting circuit, just the 1.5mm cable running to/from each downlight. There is a junction box on the mains cable on to the junction boxes completing the upstairs radial lighting circuit.