I have just bought a chimney fan which has a spiral metal flexible conduit containing the wires that supply the fan. (This is a mains powered fan to sit on the top of a chimney, not a heat powered one for indoors).
Not that what it's for is very relevant. How are you supposed to terminate the flexible conduit properly? The problem is similar with plastic, wire reinforced conduit, the ribbing is spiral so you can't seal to it very well and even if sealing isn't incredibly important how are you meant to make a proper mechanical fix to the end (into a junction box presumably)?
If I feed the flexible into the bottom of a weatherproof junction box the watertightness won't matter too much (and even provides drainage) but I can't think of a neat/elegant way of holding it there.
Now I think about it I have some glands for larger plastic conduit but I can't imagine anything similar for the quite small (1cm O/D or maybe even a bit less) metal flaxible I have to deal with now.
Any ideas?