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Discuss Use of FP200. Will it get messed up by too much flexing? in the UK Electrical Forum area at ElectriciansForums.net

1Justin

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I have electrics to add in a listed barn. It's a unlined shell of a building, grubby cobwebby beams and timbers with external claddding. Customer must have all black wiring so as to hide it as much as possible. Everything will be clipped with metal accessories. Trunking/conduits are too big and because the whole building is utterly wonky, nothing which is straight or right angled will fit anyhow.
The BLACK thing has me going, so prevents T&E.
I immediately said to the customer I could run it in H07RN-F which is defined as "heavy duty" (Hence OK for permanent wiring re 521.9.1 and BS50565-1. ).
The slimmer, cheaper and easier to use H05RR-F (Which is most rubber cable in distributors) is not defined as "heavy duty" but merely "tough". This gets into semantics, but sticking with the regs and BS50565-1, I must have "heavy duty" (that does seem to be a technical terminology) cable for permanent wiring. Hence will probably make myself insist on H07RN-F

An alternative might be black FP200. I have to admit I've not used FP cable in the past. My thinking is, I'll be up a ladder and scaffold looping and flexing this round 300 year old dirty beams. I'm concerned that the FP200 being stiff with it's alloy tube will end up a complete mess if it gets flexed much during install. - Would I be right in that prediction?
 
as long as you dont squash the tube when youre bending it you can get a decent curve on it for 90* bends, play about with a few bits to get used to forming it, pretty much the same as doing conduit without the spring
 
NYY-J all the way mate, easy to strip and terminate, tough as old bulls ears, available in up to 5 cores and 6mm (may be more but havnt used before)
Its solid core so sets nicely and is to an IEC standard so perfectly allowable to be used, black 12mm and 14mm clips spaced 40cm apart and your laughing

NOTE:HO7RNF is actually a flexible cable so you should imo avoid that for fixed wiring. (Unless you really fancy bootlacing EVERY end?)
 
NYY-J all the way mate, easy to strip and terminate, tough as old bulls ears, available in up to 5 cores and 6mm (may be more but havnt used before)
Its solid core so sets nicely and is to an IEC standard so perfectly allowable to be used, black 12mm and 14mm clips spaced 40cm apart and your laughing

NOTE:HO7RNF is actually a flexible cable so you should imo avoid that for fixed wiring. (Unless you really fancy bootlacing EVERY end?)
40cm? easier to just clip to the length of the hammer as you go, 40cm needs marking out etc
 

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