M
MOSSEP
Correct, the appliance has its own protection - a boiler for example usually has a terminal block with its own fuse in it.
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fused spurs
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View the thread, titled "fused spurs" which is posted in UK Plumbers Forums on UK Plumbers Forums.
Correct, the appliance has its own protection - a boiler for example usually has a terminal block with its own fuse in it.
I havent done anything, this is just one ive came across that has got me thinking. But yes t+e into boiler. Mi's say at least 0.75mm pvc insulated cable....dosent say you have to use flex.
M
MOSSEP
To throw a spanner the works, you could feed an FCU with a run of 1.5mm t+e clipped direct from the consumer unit and protect it with a 16A 60898.
dude it sounds like your out of your depth, from the fused spur to the boiler use flex looks much better and you wont have any problems with the glands on the boiler
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That's because they don't make 0.75mm flat t&e
Yes a 1.5mm ref method c will carry 19.5 amps.
So are you saying you should never take t+e flat cable into a boiler?
M
MOSSEP
or if you got a bit of 1mm pyro knocking about you could use that as well, might be a struggle to make off for most folks though ;-)
D
Dotty
You can't spur off a radial circuit!
You can extend a radial circuit though,
M
MOSSEP
You can spur, and extend from a radial circuit as long as the cable is sized correctly. Its not great practice to spur from an immersion heater radial though as the OSG appendix 8 says that water heaters of 15l capacity or more should be on there own circuit.
D
Dotty
Agreed, but extending is one thing, spurring off another entirely.
M
MOSSEP
Why is that?
tbh mate you wouldnt need to know unless your going trough a sparky/part p course
Just for the record I never wire boilers hense all the questions/confusion!
Croppie are you saying that you cant change an immersion for a fcu?? Thought this was standard on refurbs to use the old immersion for the new boiler?
D
Dotty
The osg says about spurring off ring mains, one spur per outlet (or double outlet)
Categorically states not off radials.
you can when you remove the immersion/cyclinder but you can spur off an immersion circuit with the immersion still in use
So what if the boiler cable is totally seperate/nothing to do with the fold down panel?!
dont take too much into your head just use flex from a fcu to the boiler
D
Dotty
Course you can do that, senseless not to. But you'd be changing the immersion isolator to a FSS to feed the wiring centre. Any remote isolators, such as in the kitchen, for example, would need to be turned into a junction and blanked off.
Of course.
This example is just for a combi. so cylinder gone, immersion switch changed to fcu for combi.
whats about the boost button in the kitchen like most old house had?
Regardless of the run/distance and route ie under floorboards through joists?
Pass, lol
M
MOSSEP
Have to disagree there, although not got an OSG to hand to check. Spurring from radial circuits
when fused and wired correct is no issue at all. A 16A radial circuit run in 2.5mm T&E for instance cannot result in overloaded cable if the spurred cables are in 2.5mm T&E.
no fcu should be by the boiler as to isolate the boiler and not having to search half the house to find it
Why not? (Other than the fold down cover issue)
20 years ago the boiler, the pump everything was wired in t&e, nowadays it 'good practice' to use flex.
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t+e doesnt like repeated movement, esp with heat the pvc goes hard and then you fold the cover down and it splits leaving the inner cores on show
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