B
Badged01
Try Reg 433.2 to cover you for ommission of overload protection on a conductor ....
Discuss Lighting circuit taken off ring main somewhere in the UK Electrical Forum area at ElectriciansForums.net
Replace the 1.5 feeding the switch (replace switch with FCU) with 2.5 simples it aint rocket science it's in the OSG plain as the nose on your face, no arguments just do it right the first time as Mike Holmes says.
I would suggest that you start by picking up a bloody regs book!!!
OK, to continue the discussion I'll try ....... as I understand the regs the C/B is installed to protect the cable, which in this case I read it as a 32A C/B protecting the 1.5mm cable fed off 2.5mm cable. So the 1.5mm cable isn’t being overload protected by the 32A C/B.
But regs do allow that if due to the cable load characteristics it isn’t likely to be overloaded then overload protection isn’t needed --- provided there is fault protection. For the 12V lights connected via a transformer I’ll take this as holding true for overload and the 1.5mm cable is good to use without circuit overload protection.
However, Ive still got to provide fault protection for this 1.5mm cable even though I don’t need overload protection. I’ll assume an RCD so a L/E fault is taken care of but what about a L/N fault? Will the cable hold out before the 32A C/B or DNO cut-out “pops”?. Using the let thro current calc will probably show the 1.5mm cable can handle this energy and is OK to use.
But if it cant handle the fault, how do I now provide fault protection for the 1.5mm cable?
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?Fault protection will be supplied via the CB.
I understood from OP that there is FCU fitted, this give overload protection.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.
youre all missing the point !
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?
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?
Reply to Lighting circuit taken off ring main somewhere 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.