Discuss Fusing Fans to manufacturers spec in the UK Electrical Forum area at ElectriciansForums.net
not yet but i'm working on itToo many ciders again!
If you fit Vortice or Solar & Pallau fans the manufacturers instuctions only require a "multipole switch for isolation" so makes the whole fusing down argument redundant.
All manufacturers instructions I've seen require the fuse to be in the line BEFORE the split for the switched live.
So IMHO although the original post looks good I don't think it would hold water in a court of law IF anything went wrong, and surely thats the reason we bend over backwards to follow nonsensical regs and manufacturers instructions.
That's the easiest option. With the vast majority made in China and with **** poor installation instructions it's hard at times to work out what they want.To be safe I think I'll start fusing the whole bathroom lighting at 3a then no-one can send me to jail for anything...
I must be the only person that doesn't put it through a switch fuse. Might be manufactors instructions but I don't see the point
To be safe I think I'll start fusing the whole bathroom lighting at 3a then no-one can send me to jail for anything...
that won't work with a timed fan, you need both perm and switched.
Whilst I agree that the fuse is fairly pointless since the circuit is protected by a 6A breaker (fires notwithstanding) since most manufacturers state the fuse should be before the light this is what I would tend to do.
If you only fuse the permanent line going to the fan then if the fuse goes you can still supply a line to the fan (that may now be in a dangerous state if it has overheated or such) by switching on the light. I do not know if the SL is just an electronic run signal to employ the PL or if the two lines are commoned up in the fan, but if it is the latter then you could be trying to operate the fan once it has blown the fuse and presumably cause the fire that was averted by the fuse blowing, or trip the 6A lighting if it is a more direct fault. If the former then there can still be a line supplied to a damaged circuit board which cannot be good.
e.g. with just PL fused: switch on bathroom light, fan starts, switch off bathroom light, fan overrun continues, you leave, five minutes later fuse goes, later you come back, switch on bathroom light, fan bursts into flames or all the lights go out.
With supply fused: switch on bathroom light, fan starts, switch off bathroom light, fan overrun continues, you leave, five minutes later fuse goes, later you come back, switch on bathroom light, no light, oh dear something has gone wrong, better find out what it is.
I think the two options are as shown in this borrowed and modified diagram and I would definitely prefer my fuses to isolate the whole supply and not just one leg of it.
Good
View attachment 14251
Bad
(in my opinion)
Reply to Fusing Fans to manufacturers spec in the UK Electrical Forum area at ElectriciansForums.net
We get it, advertisements are annoying!
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.