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?

 

[Rosco]

As long as it’s rolled off the drum straight on cable runners and clipped sensibly I don’t think you’ll have a problem with it.

 

[1Justin]

It'll be more like "weaving" I recon from the look of this place.

 

[ruston]

What about Pyro? Or will the budget not allow it?
The location seems Ideal for it.

 

[Wes1000]

NYY - Hi Tuff cable??

 

[Taylortwocities]

NYY-J Cable

Sorry wes. just seen your post. great minds think alike?

 

[Wilko]

NYY-J Cable

Hi - I don't use it myself, as there seems to be advice that it's not approved under BS7671 for fixed installations, but I may be mistaken (?). See this notes -
NAPIT | Is non-Standard Cable Acceptable? - http://professional-electrician.com/features/napit-non-standard-cable-acceptable/
And
The Approved Cables Initiative (ACI) :: ACI issues warning to installers over cable claims - http://www.aci.org.uk/news/aci-issues-warning-installers-over-cable-claims

 

[Spoon]

Hi - I don't use it myself, as there seems to be advice that it's not approved under BS7671 for fixed installations, but I may be mistaken (?).

Think you may be mistaken mate. We have talked about SY cable not being suitable for 'fixed installations' and that in them posts NYY-J was suggested as a cable that can be.

 

[LankyWill]

FP is pretty tough and takes a beating on commercial jobs when dryliners are bashing it about boarding. I think it should be fine as long as your gentle with it, NYY-J is very heavy duty and very versatile but can be a pain to terminate.

 

[1Justin]

Thanks for the links. and suggestions. I'll check those out before I quote (bearing in mind NIC "non standard" comments.)

 

[Pete999]

Thanks for the links. and suggestions. I'll check those out before I quote (bearing in mind NIC "non standard" comments.)

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?

 

[Midwest]

I've only used it once, on a barn conversion. It was a bit trouble some, especially at the DB end with the mass of cables. I was only involved in the 2nd fix, it's almost impossible to do without the appropriate stripping device.

 

[Pete999]

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?

Blimey 1 so far thanks Dave appreciate that

 

[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

 

[Pete999]

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?

Aye up there's another