Hi. I want to install a shaver point in a bathroom for a fussy landlord, but she only wants it to be used when the shower is on, not sure why. I am going to wire it off the shower circuit and cut down the cores so I can fit them all in 15A connector blocks in the loft. Is this ok? If not what regulation prevents thing?
- Thread starter ChrisElectrical88
- Start date
Yuk!
For starters, somewhere in section 5 it says not to reduce cores down (will look up later). Second....how on earth is that meant to work in practice? So, I'll just leave a 10kW shower running whilst I nip to have a shave?? Madness!
If you DO end up having to proceed with this, what's wrong with just coming off the downstream side of the isolator in 1mm?
For starters, somewhere in section 5 it says not to reduce cores down (will look up later). Second....how on earth is that meant to work in practice? So, I'll just leave a 10kW shower running whilst I nip to have a shave?? Madness!
If you DO end up having to proceed with this, what's wrong with just coming off the downstream side of the isolator in 1mm?
S
sparkyphil1
Hang on .......nope just as I thought April fools day still Is the 1st of April !
J
jaypp
if replies tell you why u shouldn't, are u sure you won't do it anyway and ask for proof why you can't?
Can you back this up with any regs? I don't care what you say this is how I want to do it.
M
MDJ
No problem, use 60 amp connectors instead and wire a bit of 6mm2 to it and feed your shed as well, no harm done as there is no reg saying you cannot, so why be a sheep and follow the crowd, perhaps to get your post count up? :biggrin5:
Well......on account of not being able to track down the reg that I thought existed about cutting cores down, then NO! On a serious note, where am I not looking?! Is it previous book and now been removed for some reason???
M
MDJ
526 I think, had a look last night but it is way to early to start checking out the BGB today haha, something about correct connection of similar sized cores blah blah and 314 goes into proper circuits and not spuring everything together I think, that was yesterday I canny remember all the words now
does it need to be a RCD FCU? as i only have a old BS3036 board, which i shorted all the fuses out with copper as they kept blowing.
And on a serious note, my BGB has grown legs and walked off, it was right in front of me last night for doing some cable calcs and showing one of the sparks not every friggin reference method is B (does anyone else get this?) come in this morning and its vanished!!!
H
Hawkmoon
Perhaps your 'ref method b' spark stole it...in order to expand his reference method horizons (every cloud....)
He doesn't need it, i give everybody a small testing folder with ref methods disconnection times all the essentials in to help them when the are testing. Once this amendment 3 is out i am getting a job load of GN3 and OSG for the lads, cant warrant paying nearly 500 quid now and then another 500 in about 6 months time though.
Thats the problem not one reply gave a sound answer why it should not be done.
We can take a fan feed from a lighting circuit (fused down correctly to manufacturers recommendations) so the fan comes on only with the bath room light. Well what if you only want the fan to come on with the shower ? Is this such a no no ?
Smoke detectors and intruder alarms are often spurred from lighting circuits. This is common practice.
is it only that the shower fan is not regular practice or is there a valid reason why not ?
it was suggested that dissimilar conductor CSA in the same terminal may be an issue but with stranded 6 or 10 mm with a 2.5 in the same terminal it would bed correctly, try it.
I quoted the reg regarding positioning of FCPD which is exactly what I suggested.
I'm all for taking the p**s but let's have some proper electrical input.
Z
Zebra Stripe
Mechelec, thats a bit unfair.....I put forward quite a strong reason not to proceed with an extract fan connected to the shower.
These fans usually require a 3amp fuse (manufactures instructions) and in this instance the OP had suggested 2No FCU ie a fuse on the live and a separate fuse on the switched lived. This would effectively create 2 new circuits sharing the same neutral and as such is non compliant with BS7671...borrowed neutral
These fans usually require a 3amp fuse (manufactures instructions) and in this instance the OP had suggested 2No FCU ie a fuse on the live and a separate fuse on the switched lived. This would effectively create 2 new circuits sharing the same neutral and as such is non compliant with BS7671...borrowed neutral
Sorry zebra you are right that would be a poor idea but my suggestion was for no run on timer fan only on when isolator is on.
see telectrix good answer above.
One reason could be not complying with the building regs on a new build.
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Z
Zebra Stripe
Circuit definition is 'an assembly of electrical equipment supplied from the same origin and protected against overcurrent by the same protective device(s) therefore IMO the 3amp fuses are the same as two diffent MCBs in a DB sharing the same neutral....borrowed neutral...the origin for the fan is now the 2No FCUs
The supply would be to a fan wired in 4 core flex more than likely. Would you really be disconnecting any core of the flex without carrying out safe islolation ?
OK but an EICR should be objective not subjective. Care to put some meat on the bones.
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