Metframe RCD protection

[Chrisbeats]

Good Evening

Have been testing a converted office block to flats last week and have found many circuits non RCD protected that serve high level Spurs in the landlords corridors (3 inches below ceiling). I was told that they don’t need RCD protection as the cable runs in between two metframe uprights. Where I’m understanding it does as the wall is made of metallic regardless of depth (Reg 522.)
Am I right. Spoke to the Niceic today and they said yes.
The building is being signed off as 17th edition amd 3
Peoples opinions please.

Chris

 

[Chrisbeats]

Wiring in lsf T&E

 

[Andy78]

Yes you are right as I understand the regulation.

 

[Deleted member 26818]

Don’t know what a metframe is?
Sounds like they are saying, it provides mechanical protection to the cables.

 

[Chrisbeats]

Met frame is metal studs to which plasterboard is screwed to. It’s not a form of mechanical protection and is not earthed.

Thanks for the replies.

 

[Nigel]

So in between two metframes rather than through the metframe?

 

[MJPD29]

My understanding is that you are right also