Earthing Metal Light Switches After Replacing Plastic ones


Postby jhwilliams1992 » Tue Oct 25, 2016 4:59 pm

Hi,

This may be a obvious question, but I am currently replacing plastic light switch face plates with metal ones; so far I have been earthing straight to the earth terminal on the face plates.
Does it matter that I am not also earthing the the metal back box?

My logic is surely it's more important to earth the face plate itself, but have seen online that you should really earth both.

Cheers.
Josh
jhwilliams1992
Rank: Labourer
Progress to next rank:
0%
Posts: 1
Joined: Tue Oct 25, 2016 4:50 pm

Sponsor

Simply Build It

Postby kbrownie » Thu Oct 27, 2016 6:38 am

The Belt and Braces Rule, would make it sensible to earth to both.
But the requirements allow you to only terminate the switch plate, if you have a rigid fixing lug to screw plate on to the backbox.
If both fixing lugs a movable/adjustable, then you must earth both plate and switch.

The most important thing to do, when installing metallic plates, is not only to connect the earth (CPCs) but also to actually establish that a path to earth is present and continuous. Otherwise connecting that bit of cable would be pointless and by swapping plates you have introduced a potential danger.
kbrownie
Rank: Project Manager
Posts: 1960
Joined: Mon Mar 05, 2007 9:36 pm

Display posts from previous
Sort by
Order by



  • DIY How to Project Guides

  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!



 


  • Related Topics