Cable type on catenary.

[C00KIE]

What's the best cable type for installation on external catenary wire? 400Vac 4mm2 5core cable. The catenary wire will be relatively tight and provide support for the cable. My concerns are weather resistance, mainly UV, and flexibility.
Suggestions gratefully received.

 

[Spoon]

Welcome to the forum mate.
It all depends on the installation.
You could use armoured cable, which has great mechanical damage protection but is a bit heavy or you could use Tuf Sheathed cable which doesn't have the same amount of protection armoured has but is lighter. There will be other cables you could probably use...
Tell us more about the installation and we may be able to help you more.

 

[C00KIE]

Welcome to the forum mate.
It all depends on the installation.
You could use armoured cable, which has great mechanical damage protection but is a bit heavy or you could use Tuf Sheathed cable which doesn't have the same amount of protection armoured has but is lighter. There will be other cables you could probably use...
Tell us more about the installation and we may be able to help you more.

Thanks for your reply.
The application is domestic 32A 3 phase distribution circuit supplying a detached barn adjacent to the house. The catenary part of the cable run is about 9m and the total run is 35m. The catenary does not traverse a vehicle access and will be installed at a height of about 5m. Both buildings have solid stone walls so fitting a strong catenary wire is no problem. The rest of the run will be clipped direct both interior and exterior. The barn installation will include socket outlets, lighting and a supply to a 3 phase 2 post vehicle lift. The distribution circuit will be protected by a 32A C type MCB. The earthing system is TT. I may install a new electrode for the barn.
I'd like to select a cable that is adequate and appropriate for the catenary as this is the most onerous part of the cable run with respect to environmental influences.

The installation is in France so compliance with BS7671 is not strictly necessary although compliance with BS7671 would likely make it safe. Obviously I have to ensure that it complies with the French electrical installation regulations.

 

[suffolkspark]

HO7RNF

 

[pc1966]

If the cable itself need no mechanical protection then I would avoid the weight of the SWA. Don't aim for too tight a wire as it massively increases the forces to get it there, and reduces the tolerance to changes in tension with temperature, wind, ice loading in winter, etc.

That means you will get a bit of movement in the wind, and so the suggestion above for rubber HO7RNF is probably best as it is fine-stranded and going to last longer with some flexing, as well as being outdoor/UV rated. Also allow a little loop where it goes from wall-fixed to the wire so no tight flex radius at that point.

Finally remember to put ferrules on the ends though so it is reliably terminated!

 

[Rockingit]

H07 definitely. And don't overtighten the catenary, remember a drip loop each end.

 

[C00KIE]

Thank you all for your advice. I appreciate it. I'm going with the H07RN-F. It's ideal.
Some handy tips with the catenary wire too, cheers.