I wanted the fibre to come into the loft of my house through an exterior gable wall and then be routed 4 m through the loft to the rear of the loft room wall, through that wall and into the ONT on the other side. This run included a 90-degree turn. Having read the suggestion of moosekebab. I ran a 4 m length of 20 mm flexible electrical conduit clipped to the top of the ceiling joists. I used a 4 mm rope for a drawstring through the conduit. I inserted the conduit through the exterior wall so that its end was flush with the outside brickwork I pushed the other end through the interior wall so that its end was flush with the inside wall. I used a 22 mm masonry drill to drill the walls.

When the BT guys came, I showed them what I had done and asked if they would be able to use it. Their reply was best summed up with the comment "Norrarf! You've saved us half an hour work time"!

BT Ultrafast
300Mbs down, 50Mbs up

Edited by deleted (Fri 19-Feb-21 22:55:20)

So I've been busy with work and personal stuff and only got round to looking at this this weekend.
The wall I want to run my conduit down is dot and dab (I assumed there was some sort of stud as well due to the thickness and hollow sounding of the wall.. obviously I was wrong).
The gap between the breeze block and drywall is 15mm at the smallest point I can measure (I am slightly assuming this is as narrow as it gets) Ive made a route from the loft to the ground floor where the existing line comes in and I should be able to navigate round the dot n dab.

As my original idea of 20mm is now too big, I will look to use 15mm conduit, but for the connectorised cable what is the smallest internal conduit diameter I can get away with for drawing it through? Ive seen pictures of some sort of black capping on the splice end, does this need drawing through as well or is that cut off beforehand?

Thanks again.

Makes no odds. They won’t draw a connector(ised cable) through any conduit. It would be fecked in seconds. They just pop the connector on the end once the cable is in situ.

In reply to a post by Pheasant:

They won’t draw a connector(ised cable) through any conduit. It would be fecked in seconds.

That seems at odds with the experience of others on this thread who've preinstalled a route??
I know they draw the cable from the ont to the outside, just wondered if it's drawn with this black capping and what the diameter of the connectorised cable is..

Also do we still need to provide a double backbox for the ONT?

In reply to a post by ste__:

In reply to a post by Pheasant:

They won’t draw a connector(ised cable) through any conduit. It would be fecked in seconds.

That seems at odds with the experience of others on this thread who've preinstalled a route??
I know they draw the cable from the ont to the outside, just wondered if it's drawn with this black capping and what the diameter of the connectorised cable is..

The "inside out" method doesn't use the connectorised cables but splices instead.

It's drawn from the ONT to the outside with no connector on the end of the cable. It's then spliced outside.

In some areas they may still be older install methods. These tend to be pulled from outside to inside.
My install was like this and again it had no connector on the end of the cable. This was fitted inside the property to connect to the ONT.

I don't think the preterminated cables will fit inside such a small conduit comfortably, especially if there are any tight bends.

Also do we still need to provide a double backbox for the ONT?

That's never been a requirement that I'm aware of.

They are only needed for the new enclosures which I've not actually seen used on anyone's install.
I'd assume they are used in new builds and the backbox will be there already or fitted by OpenReach.

Edited by j0hn83 (Mon 08-Mar-21 12:13:20)