Lighting circuit taken off ring main somewhere

[Ross1]

evening guys, ive come across lighting in one room of domestic premises that has been supplied from the ring main at some point. the cable coming from the ring is 1,5mm which goes through the switch then on to the 2 x 12V down lights. This is on an EICR I`m doing. There is no chance at all of accessing under the floor boards as there is very expensive oak flooring down every where. I believe that from memory you can use a switched fused spur for functional switching. I could then put in a 5A fuse and the load side of the cable will be protected. My concern though is the piece of 1,5mm from ring to switch? your thoughts on this would be welcome. I see this as no different to taking a spur off the ring for an extra socket etc, or am I forgetting some thing?

 

[AndyL]

True, if the 32A C/B can do the trick for 1.5mm cable?!?!. But the question was aimed that if the 32A C/B cant (and there isnt an FCU fitted for overload protection) how is fault protection now covered?

I understood from OP that there is FCU fitted, this give overload protection.

From reg 434.5.2 the 1.5mm cable will reach its limiting temp in about 1.6 seconds (assuming 160A fault current) As the CB will operate in about 0.1 seconds, at this current, fault protection is afforded

 

[Badged01]

I understood from OP that there is FCU fitted, this give overload protection.

Sorry if my reply has confused but the thread is directed along there being no FCU fitted for protection, hence my question for how to protect for fault current in the unlikely event that the 32A C/B cant!.

 

[AndyL]

If there is no FCU then overload protection would indeed be required, fault protection is still given by 32A CB

 

[Zeus]

you are right that you can take lighting off a ring final circuit and I know its bad practice to use 1.5mm cable to do the first leg of that circuit extension with but as 1.5mm can carry up to 16A, that first leg will only be carrying the load of the lighting to which you will have a 5A fuse in series. so I would make sure firstly that the 1.5mm does not form part of the ring final circuit and if this proves so then I would have said it is ok to remain. just note as a code 3 on your report.

 

[Guest55]

youre all missing the point !
the OP declared this to be an eicr , therefore the only discussion should about the coding if any.
and IMO its probably a C2 - but a 2 minute fix with a switched fused spur.

 

[Badged01]

youre all missing the point !

You're being far too serious and stopping us having all this fun and banter to liven up the day

 

[Guest55]

im never serious !
seriously.
;-)

 

[GLENNSPARK]

but even after prominant members in here made it quite clear that it was acceptable to use a 1.5 as a feeder to an FCU there were still several others continuing blubbing on about how they would rip out the 1.5 and replace with 2.5....
an unneccessary nonsense if you ask me
christ, what do some in here think we fuse down for?

 

[shanky887614]

but even after prominant members in here made it quite clear that it was acceptable to use a 1.5 as a feeder to an FCU there were still several others continuing blubbing on about how they would rip out the 1.5 and replace with 2.5....
an unneccessary nonsense if you ask me
christ, what do some n here think we fuse down for?

The fun of it?

Lecky takes easiest route so splicing cable then adding fcu would be more than adequate.

If i was installing myself though id probably use 2.5 to fcu but woudlnt replace if it was done in 1.5

 

[telectrix]

but even after prominant members in here made it quite clear that it was acceptable to use a 1.5 as a feeder to an FCU there were still several others continuing blubbing on about how they would rip out the 1.5 and replace with 2.5....
an unneccessary nonsense if you ask me
christ, what do some n here think we fuse down for?

prominent, glenn. get a grip, man. :angelsad2:

 

[GMES]

What really scares me with threads like this is how many so called electricians seem to think it is dangerous to utilise the 1.5mm to a fused spur, as stated by Glenn spark and others it is perfectly ok to do this, I sometimes wonder where the train of thought comes from to rip someone's house apart just because they don't seem to understand the basics of electrical work.

 

[GLENNSPARK]

What really scares me with threads like this is how many so called electricians seem to think it is dangerous to utilise the 1.5mm to a fused spur, as stated by Glenn spark and others it is perfectly ok to do this, I sometimes wonder where the train of thought comes from to rip someone's house apart just because they don't seem to understand the basics of electrical work.

its a waste of time as well when after stating such facts there are still those that refuse to listen..
and so will go forth and ruin decor/cost unneccessary cash/invent non-existant remedial works....all a con..as Damian quite rightly pointed out earlier in this nonsense...

 

[GMES]

its a waste of time as well when after stating such facts there are still those that refuse to listen..
and so will go forth and ruin decor/cost unneccessary cash/invent non-existant remedial works....all a con..as Damian quite rightly pointed out earlier in this nonsense...

It really is crazy mate and the scariest part is like you said they can't understand it which in my view means they shouldn't be in the game.

 

[7029 dave]

It really is crazy mate and the scariest part is like you said they can't understand it which in my view means they shouldn't be in the game.

So electricians that taught me this trade,don't know what their talking about!! (1979) some are proberly not with us any more, and proberly before you was born!!. Close this ****in thread!!

 

[Zeus]

It really is crazy mate and the scariest part is like you said they can't understand it which in my view means they shouldn't be in the game.

I disagree it fills me with a sense of joy to hear people say such stupid stuff cause it means that they will always be creatin work for others that will be far less cheaper cause they haven't quoted to tear the house apart for no reason! Good electricians won't ever have to worry about any recessions!