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hello guys

I have a lighting install at high level outside a house.
I don’t need additional mechanical protection and would like to use a good UV resistant insulated and sheathed cable.
Don’t want to use conduit as it looks ugly.

I normally used white FP 200 which the manufacturers said supports UV light exposure however I have seen a few installs where after 6 years turns to dust.

(I might be getting a phone in from client is a few years time as a result)
 

James

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Nearly all black cable has good uv resistance.
The black is normally created with carbon dust in pellet form as the material is being processed.

Obviously check with the cable spec but black anything is nearly always considerably better uv resistance than the same white cable.
 

Strima

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I tend to use standard black flex for domestic lighting circuits outside if the installation method allows it.
 
D

Deleted member 9648

hello guys

I have a lighting install at high level outside a house.
I don’t need additional mechanical protection and would like to use a good UV resistant insulated and sheathed cable.
Don’t want to use conduit as it looks ugly.

I normally used white FP 200 which the manufacturers said supports UV light exposure however I have seen a few installs where after 6 years turns to dust.

(I might be getting a phone in from client is a few years time as a result)
Don't forget you'll need to secure it with fire resistant fixings at intervals
 
D

Deleted member 9648

Not funny at all, a fact, seen several recent installs on external walls which don't comply for that reason
 

1Justin

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I tend to use H07RN-F. It's tougher & thicker than the normal black rubber cable H05. It's rarely on the shelf, normally have to mail order it.
 

happyhippydad

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hello guys

I have a lighting install at high level outside a house.
I don’t need additional mechanical protection and would like to use a good UV resistant insulated and sheathed cable.
Don’t want to use conduit as it looks ugly.

I normally used white FP 200 which the manufacturers said supports UV light exposure however I have seen a few installs where after 6 years turns to dust.

(I might be getting a phone in from client is a few years time as a result)
I use black rubber flex. I would usually use H07RN but on occasion would use H05RR. I personally think that even black PVC flex (H05VV) would be ok outside as I put some in my own property many years ago and it is fine. However I use rubber for customers as that is the correct choice. Also, this is only if it does not need mechanical protection, otherwise SWA.

Manufacturers instructions often say to use 1mm H05RN but finding that is like gold dust, so you have to bump it up to the H07RN. You do find that because it is rated up to 700V it is quite thick which can be a bit of a pain sometimes.

This is just one of many useful threads on outdoor cable..
Outdoor Flex Cable RR-F or RN-F - https://www.electriciansforums.co.uk/threads/outdoor-flex-cable-rr-f-or-rn-f.169160/page-2#post-1463746
 
Last edited:

Lucien Nunes

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Neat, resists everything, requires fewer fixings to keep it straight and they are inherently fire resistant. A bit slower when working it with limited access.
 

ipf

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Neat, resists everything, requires fewer fixings to keep it straight and they are inherently fire resistant. A bit slower when working it with limited access.
I remember a fire wrecked labour club about 40 years ago, it had been wired in pyro, as per regulations in some council areas. The pyro copper sheaths were all sorts of colours....but it was still mostly intact. We removed some from the wreckage and tested it just for the sake. Plenty turned out clear and continuous. Amazing stuff.
 
B

Bobster

I remember a fire wrecked labour club about 40 years ago, it had been wired in pyro, as per regulations in some council areas. The pyro copper sheaths were all sorts of colours....but it was still mostly intact. We removed some from the wreckage and tested it just for the sake. Plenty turned out clear and continuous. Amazing stuff.
I remember the first time I saw pyro whilst an apprentice in the training center.

Our instructor ran a blow torch over it, bashed it flat with a hammer and then tested it's IR an continuity, passed both tests. It can take some abuse!
 

suffolkspark

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What B.S number does this cable have?
NYY-J / hi-tuff doesn't have a BS number but does have an IEC number, so its ok to use, theres a paragraph in the regs somewhere saying we can use bs and iec cables..... vde only registered ones like sy though are a no go as we all know.
 

davesparks

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I normally used white FP 200 which the manufacturers said supports UV light exposure however I have seen a few installs where after 6 years turns to dust.

)
The manufacturers say that white is more suited out of the choice of white or red, they don't say it is UV stable.
What properties of FP make it the best choice for this kind of installation? Unless you need the fire performance I don't see why it would be the best choice?
 
T

Toneyz

I remember the first time I saw pyro whilst an apprentice in the training center.

Our instructor ran a blow torch over it, bashed it flat with a hammer and then tested it's IR an continuity, passed both tests. It can take some abuse!
Same here gave it some abuse still ok.
 
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