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Touched on this before, unable to find thread. Many thanks for your comments re isolation switches etc.
I've now decided to go for 4 x in line extractor fans all sited in the loft. Also that the isolation switch for each fan be sited along side each fan. The isolation switches will be surface mounted on the gable walls for ease of access.
What's best way to terminate flex from fan to isolation switch? Clip flex onto wall and into surface box as you would a cable? Use a surface box with knockout and use a stuffing gland. I doubt that an isolation switch has a cord grip like a fused spur point has or is there?
 
Your an Electrician Driverman so Im a bit confused why you are asking how to terminate a flex to a isolation switch, Id be happy to answer this in the DIY forum but this level of question is a bit basic for the general forum. Use your BGB (Regulation book) look up cable termination and review the section directed to.....simples!

The only issue here with flex that most ignore or forget to do is it requires the ends are crimped first before termination unless the point of connection is specifically designed for fine wire cable... unlikely in your case so dont forget to crimp!

If you have any issue interpreting the Regs then again Im happy to help as the regs are ambiguous at best but you need to help yourself here and look it up first before posting. such a question.
 
Your an Electrician Driverman so Im a bit confused why you are asking how to terminate a flex to a isolation switch, Id be happy to answer this in the DIY forum but this level of question is a bit basic for the general forum. Use your BGB (Regulation book) look up cable termination and review the section directed to.....simples!

The only issue here with flex that most ignore or forget to do is it requires the ends are crimped first before termination unless the point of connection is specifically designed for fine wire cable... unlikely in your case so dont forget to crimp!

If you have any issue interpreting the Regs then again Im happy to help as the regs are ambiguous at best but you need to help yourself here and look it up first before posting. such a question.
Your right re basic question...the angle i was coming from was the IP rating of the surface box when taking in a flex in the knockout. Not been in the game fro many years, just want to do it 100% correct even though it's all in the loft which is just as important as any where else. Thanks for your offer though, appreciated.
 
IP rating is not the real crucial thing here as its in a loft so shouldn't be subject to a heavy dusty atmosphere or water ingress, as long as the flex is secured at entry point of the backbox or held in position with clips then it will be fine as any movement of the flex will not act on the terminations you are fine to just use common sense in that their are no obvious dangers to anyone be it the owners or other trades.
 

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