Minimum radius for fibre optic cable

murphaph

Hi all,
We're building a house at the moment (well at the early stages of laying the temporary access road as the house will be 150m from the road at the front. I want to lay conduit under the drive for the point in the future when fibre optic comes to us. Digging up the access way later would be possible but a nightmare as the access way will be shared with another house and well I want to avoid any disputes later. So, I'm pretty sure the builder will have absolutely no experience with this stuff and if he lays it like he lays normal telephone lines I might have a big problem if the minimum radius is not adhered to, so what is it for modern fibre?

TheChizler

Couldnt give you a fixed number but I kink single mode fibre at work all the time by accident and it's always fine. 5 cm should be loads for standard non shielded cable. Would telecoms companies be happy to use your own ducting though?

mass_debater

You need to run a 38mm duct so whatever radius that bends in comfortably

murphaph

TheChizler wrote: »

Couldnt give you a fixed number but I kink single mode fibre at work all the time by accident and it's always fine. 5 cm should be loads for standard non shielded cable. Would telecoms companies be happy to use your own ducting though?

Telekom here don't care what happens really beyond the public highway...in fact they will supply you with the normal telephone cable to lay yourself if you ask them for it (saves money on the civils for them).

Thanks very much, it seems it's much smaller than I feared. I thought it would be more like 50cm or something. I can rest easy then as the conduit wouldn't even have a min radius as small as that so he wouldn't be able to mess it up even if he tried.

TheChizler

No problem. Obviously keep it as large as is reasonable for ease of feeding it.