Metal Stud In Partition Wall For Loft Plug

[*Dan*]

Im planning on taking a spur off the landing double socket and feeding this up the partition wall and into a socket in the loft.

Problem is the walls are joined together with a metal C stud which you can see in the loft. I can see where the electricians have cut holes in to them and used a grommet.

I need to cut another hole and use grommets to make way for another cable - is there a particular drill bit for drilling a nice clean hole for more cables.

 

[AndyPRK]

a spade drill bit ?

 

[*Dan*]

Thanks most of them are for wood but it’s really thin metal so should still go through.

 

[Tigercubrider]

I'd use a series of metal suitable drills then a cone cut.
Normally a cone cut is crap but for thin metal it will be ok and won't tear the metal like a spade will.
Don't forget the grommet.

Or just use a dry lining box if the cable is accessible

 

[*Dan*]

I'd use a series of metal suitable drills then a cone cut.
Normally a cone cut is crap but for thin metal it will be ok and won't tear the metal like a spade will.
Don't forget the grommet.

Or just use a dry lining box if the cable is accessible

Thanks will have a look into a suitable drill bit definatly don’t want it to tear will look a right mess and it’s really sharp

 

[conny]

With a cone bit it will leave a knurl on the opposite side of the hole so this will need dressing before fitting a grommet.
I can't see a spade bit being any use on thin metal.

 

[DetlefSchmitz]

Something like these. Note that they are used with a central drill bit to keep them in place, though the pictures don't show this.
https://www.screwfix.com/c/tools/holesaws/cat5920018?cm_sp=managedredirect-_-pta-_-holesaw

 

[*Dan*]

Something like these. Note that they are used with a central drill bit to keep them in place, though the pictures don't show this.
https://www.screwfix.com/c/tools/holesaws/cat5920018?cm_sp=managedredirect-_-pta-_-holesaw

Thanks for link really helped and will order a 20mm later on with the central drill bit for attaching them

 

[Keithmac]

Even with a holesaw you're best off de-burring the hole before fitting the gromet.

 

[Adam_151]

Instead of a grommet, I like to get a short section of 20mm pvc conduit, wind some tape a good few layers thick on the end of it and then push it down into the void in the wall (leave the tail into the wall quite long). It might seem a bit rough, but there is no way any moment will make it jump out, even if you later have to draw another cable through, etc