What size drill bit to get 2.5mm flex cable through masonry wall?
- Thread starter veedee
- Start date
Sponsored Links
What’s the external diameter of the 2.5?
A quick google suggests 10mm/12mm is often the external diameter of 2.5mm…
www.screwfix.com
A quick google suggests 10mm/12mm is often the external diameter of 2.5mm…
Prysmian 6242Y Grey 2.5mm² Twin & Earth Cable 100m Drum - Screwfix
Order online at Screwfix.com. Rigid. PVC sheath. Brown and blue PVC insulation. FREE next day delivery available, free collection in 1 minute.
Sponsored Links
Interior or exterior wall?
Sleve or no sleve?
Andy
Sleve or no sleve?
Andy
Internally please?
Externally I plan on just using a blob of silicone to prevent any water ingress.
Brilliant - Thank you.
Brickwork is rough and will chafe the cable so you should use conduit
The cheapest is probably the oval that's used for chases that will be plastered over, you can buy a length for about 50p,
www.screwfix.com
Though 20mm round would be more elegant
www.screwfix.com
I suppose if you had an offcut of plastic pipe handy you could use that
The cheapest is probably the oval that's used for chases that will be plastered over, you can buy a length for about 50p,
Tower Oval uPVC White Conduit 16mm x 2m - Screwfix
Order online at Screwfix.com. 16mm, robust, heavy gauge material construction to protect electrical wiring routes. Can be cut to size. FREE next day delivery available, free collection in 1 minute.
Though 20mm round would be more elegant
Deta TTE Round uPVC White Conduit 20mm x 3m - Screwfix
Order online at Screwfix.com. Manufactured from high impact, robust heavy gauge uPVC. FREE next day delivery available, free collection in 1 minute.
I suppose if you had an offcut of plastic pipe handy you could use that
- Joined
- 17 Aug 2010
- Messages
- 2,887
- Reaction score
- 507
- Country
I was going to say the same. I always use 20mm round as it's easier than drilling oval holes.
I find gradually working up in sizes is a good way to avoid blow outs, and once started to drill from both ends with each larger size. I don't mean trying to meet in the middle, but just about 20mm in from one end before working from the other end. If inside is lightweight blocks, plasterboard etc, then using a holesaw on that end is a good idea,then you never get the masonry bit chewing up the surface. And for direction, think about which side matters most, and which is the easiest to repair if necessary. e.g. plaster is easier to fix than facing brick.
16mm flexible conduit will take most cables you'd want to get through.
16mm flexible conduit will take most cables you'd want to get through.
I'm fitting an outdoor socket. The outdoor socket is gonna be wired to a plug as opposed to being hardwired (spur).Brickwork is rough and will chafe the cable so you should use conduit
The cheapest is probably the oval that's used for chases that will be plastered over, you can buy a length for about 50p,
Tower Oval uPVC White Conduit 16mm x 2m - Screwfix
Order online at Screwfix.com. 16mm, robust, heavy gauge material construction to protect electrical wiring routes. Can be cut to size. FREE next day delivery available, free collection in 1 minute.
Though 20mm round would be more elegant
Deta TTE Round uPVC White Conduit 20mm x 3m - Screwfix
Order online at Screwfix.com. Manufactured from high impact, robust heavy gauge uPVC. FREE next day delivery available, free collection in 1 minute.
I suppose if you had an offcut of plastic pipe handy you could use that
Are you saying that after drilling the hole (cavity wall), a better job would be to stick 20mm round conduit in the hole to prevent possible damage to the cable?
Thanks. I always blow out the plaster.
Making good with Gyproc Easi-fill ftw
Yes.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
Sponsored Links
