Then we move on to members of associations, let me first give the associations the opportunity to offer advice on how this should be dealt with this...
Lets say you get an electrical job done at your house be it a normal electrical job or a backup systems etc and the contractor is not a member of any...
I would go with Isetech suggestion - Piece of 4 core surfix with 3 switches and 3 x 1 module lighting contactors - You get the onesto 1 which is one...