In reply to a post by kommando:

The OR installation guy should have these cables with him in various lengths so no need to buy.

Just for the record most Openreach guys I believe use the Dexgreen inside out cables as they are normally surface mounted, these OFS cables are given to developer by Openreach and are a lot better and are installed within the main fabric of the property. If its going in ducting under the slab I would recommend the Dexgreen with the jacket on, if its going within conduit within the fabric I would 100% recommend the OFS cable.

Others clearly think different (not all with any exposure to both cables), but this is my opinion having seen both and I have OFS in my property.

Scoutmoor. It’s lovely stuff 😅

In reply to a post by dect:

In reply to a post by kommando:

The OR installation guy should have these cables with him in various lengths so no need to buy.

Just for the record most Openreach guys I believe use the Dexgreen inside out cables as they are normally surface mounted, these OFS cables are given to developer by Openreach and are a lot better and are installed within the main fabric of the property. If its going in ducting under the slab I would recommend the Dexgreen with the jacket on, if its going within conduit within the fabric I would 100% recommend the OFS cable.

Others clearly think different (not all with any exposure to both cables), but this is my opinion having seen both and I have OFS in my property.

What is the difference between the two cables?

Dexgreen branded cable is more or less the latest buy in bulk “general purpose” cable that Openreach fill their stores with for customer connections inside/out connectorised variety being the one installed from the CSP to the ONT location. It’s cheap.

OFS is a global manufacturer of loads of different optical fibre products. Openreach originally used their InvisiLight (Ez-bend) product range for the specific requirements found in multi-dwelling / apartment locations where surface mounted cable with a very small outside diameter and capability to be routed around very tight bends without fear of failure was a necessity. It’s more expensive.

In reply to a post by Pheasant:

Openreach originally used their InvisiLight (Ez-bend) product range for the specific requirements found in multi-dwelling / apartment locations where surface mounted cable with a very small outside diameter and capability to be routed around very tight bends without fear of failure was a necessity. It’s more expensive.

The OD for the fibre cable currently supplied to developers by Openreach for installation in new builds is 5mm and is a lot more rugged than the Dexgreen without its jacket as that is approx. 2.9mm, the cable used to retro fit flats is a different product.

As the OP is running it in containment, that may in future have another cable (or two) pulled in - imho it’s a good idea to keep the fibre double jacketed to avoid any damage from another cable pull.

If the fibre was surface mounted, different ball game. Slimest is best (notwithstanding of course running double/external sheath indoors is tut tut)

In reply to a post by Pheasant:

As the OP is running it in containment, that may in future have another cable (or two) pulled in - imho it’s a good idea to keep the fibre double jacketed to avoid any damage from another cable pull.

Thats why the OFS is the better choice, its as good as the Dexgreen (with its jacket on) but without the issue of the external sheathing being run indoors.

I can tell I'm wasting my time so I will zip it

Do you know if Openreach are generally happy to use a customer-supplied cable?

In reply to a post by jpm:

Do you know if Openreach are generally happy to use a customer-supplied cable?

The OFS fibre cable being discussed here has got 'Property of BT' all the way down it and is available to developers from an FBC.

Edit: If you're thinking of rocking up with a fibre cable from Tandy and hoping Openreach will splice onto it then thats something thats never going to happen (although who am I to say never).

Edited by deleted (Thu 10-Nov-22 09:05:35)

In reply to a post by dect:

In reply to a post by Pheasant:

32mm sufficient.

If the OP is going through the slab from under the stairs to the front of the property I would personally use the BT duct 56 (54mm) and I would suspect Openreach would also recommend that. I think only putting in 32mm conduit in when you have the chance to put 54mm ducting in is short sighted as the OP may want/need to put other providers fibre cables through it at a later date and I don't think that will be easy.

If the OP is going up and over then there is not much choice really other than settling for the 32mm conduit but I personally would put the Ebay linked fibre cable through as its the exact product developer use when doing new properties although they wouldn't typically put it in a duct/conduit but 'jpm' made a good point earlier in the thread about cable replacement which I hadn't previously considered.

To be honest I could use BT's duct 56 from the closet all the way to the exterior wall of the property, and I'll cover it with a waterproof IP66 outdoor junction box - which the BT engineer can then feed the fibre cable directly into. That's probably the 'cleanest' installation.

Here is my proposed plan
[img]https://i.imgur.com/9Tsj533.jpg[/img]

I'm not even sure why but I also routed 3x OS2 fiber cables to my office as 'future proofing' - I hope this was a good idea lol.

Edited by RAY21 (Fri 11-Nov-22 21:18:32)