When installing additional lights and fans plus isolators to an existing circuit does the whole circuit need r.c.d protection? Also main bonds to gas and water are a must but does the main earth to the old fuse board need upgrading if it is not 16mm?
I'd say all updated circuits should now have RCD protection and why do you think your main earth bonding should be 16mm, what earthing arrangement have you got?
KB
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!