The main issue with metal stud partition walls is someone like me - the installer - When I want to install a new switch or socket because I've created a meeting room in an office space that was open plan - what do I do?
I get my 25mm hole saw - or others may get a 10mm drill and poke my head above the ceiling and drill down into the wall. Install lighting cable. I used to use SWA and now use BS8436 but I've often seen twin and earth dropped down to the switch.
If I want a new socket - I drill upwards from the floor with a 90' drill (I'd always use a 25mm hole saw but its common to see a 10mm drill having been used - and there's no way to fit mechanical protection to that hole. - In a completed plaster board wall and you're installing a socket at some future point)
I always use BS8436 on a B type MCB now - used to use SWA - but its common again - to see twin and earth being use streight off the underfloor non RCD protected underfloor bus bar.
Hence - I've always reasoned - why that reg came to be.................
The main issue with metal stud partition walls is someone like me - the installer - When I want to install a new switch or socket because I've created a meeting room in an office space that was open plan - what do I do?
I get my 25mm hole saw - or others may get a 10mm drill and poke my head above the ceiling and drill down into the wall. Install lighting cable. I used to use SWA and now use BS8436 but I've often seen twin and earth dropped down to the switch.
If I want a new socket - I drill upwards from the floor with a 90' drill (I'd always use a 25mm hole saw but its common to see a 10mm drill having been used - and there's no way to fit mechanical protection to that hole. - In a completed plaster board wall and you're installing a socket at some future point)
I always use BS8436 on a B type MCB now - used to use SWA - but its common again - to see twin and earth being use streight off the underfloor non RCD protected underfloor bus bar.
Hence - I've always reasoned - why that reg came to be.................
