Hi All. I'm new here an hope to receive some knowledge and learn a lot from all you clever folks.
My question is : may you use twin an earth to wire complete installation or a part of it but surface mount the twin and earth because reg.6.4.6.1 (b) unarmoured cabels may by used for open wiring(see 6.4.5) and no were the reg.6.4.5.1 does it state that it may be installed within arms reach except 6.4.5.2 were it states "next to beams that can be used for walking on". So one may not install twin and earth surface mount on walls to switches and plugs,why do so many electricians install it that way?