Use of FP200. Will it get messed up by too much flexing?

[1Justin]

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?

 

[Deleted member 109422]

Hi Justin
I have used FP a number of times whilst helping to install fire alarm systems. You are correct in asking if it can get messed up if it is flexed too much. From my experience the answer is yes, it will get messed up, you can not treat it the same as pvc twin and earth. But if you make sure it is uncoiled in a controlled manner and the plumbers are not constantly standing on it then things will be fine. It can be made to look incredibly neat when clipped correctly, a bit like pyro.

As for stripping FP, from what I remember we just used a stanley knife, scoring around the outer sleeving, obviously checking to make sure the conductors beneath the internal foil shrouding we not damaged, then bend the cable a few times and the outer sheath snapped. Then sleeve the bare cpc and add the ferrule.

I am sorry if others think this is bad advice but this is my experience..

all the best
Sym

 

[Deleted member 109422]

Edit...oppps...

 

[Deleted member 109422]

Edit...oppps...excuse posting issues!

Newbie!

 

[Dillb]

Remember the NICEIC do not make the rules, they like to think they do but they don't, wonder how many Old tags I'll get for that comment?

I love it when people come on here and “the NICEIC said” as it usually shows how little training they have had.

 

[Pete999]

I love it when people come on here and “the NICEIC said” as it usually shows how little training they have had.

Know what you mean Dillb, reckon I know of one who will bite, let you lnowif he does.

 

[Midwest]

I love it when people come on here and “the NICEIC said” as it usually shows how little training they have had.

No different to someone saying I went on a electrical forum last night; a bunch of them said FP2000 is a pain to work with. Only difference is the NIC charge you for their opinions

 

[Dillb]

No different to someone saying I went on a electrical forum last night; a bunch of them said FP2000 is a pain to work with. Only difference is the NIC charge you for their opinions

Not really, a forum is a open debate which anyone can join in. The way the NICEIC brigade go on, its the be all and end all of topic as they have said so.

 

[davesparks]

I don’t see why you need a fire performance cable for this application so don’t really see a reason to use FP200.
Have you considered BS8346 cable such as flexshield? It is designed to be a general wiring cable for surface or flush installations and would be more cos effective than micc these days

 

[Midwest]

Not really, a forum is a open debate which anyone can join in. The way the NICEIC brigade go on, its the be all and end all of tooic as they have said so.

tooic?

 

[Dillb]

tooic?

edited so it now makes sense.

 

[Midwest]

Not really,

Yes it is.

 

[Dillb]

Yes it is.

I explained the differences yet you chose not to quote that or explain why.

 

[Midwest]

I explained the differences yet you chose not to quote that or explain why.

Did you, thats just your opinion, I've already given mine. See, democracy is thriving . And I've not even given you a disagree

 

[Dillb]

Its about debate and understanding, yet you choose to do neither.

 

[Midwest]

Its about debate and understanding, yet you choose to do neither.

Its not one that would be a runner at the debating society. Your only annoyed 'cos you made a spelling mistake.