see page 3 of the catalogue
http://www.electrium.co.uk/Appleby2003(4).pdf
These are renowned for loss of earth continuity when installed in sand and cement render. years ago you could buy socket and switch boxes with the clamp attached, seem to be favouring the retrofit clamps now. MK used to make a surface version in plastic with integral clamps. Great idea if you use earth tail pots, not too good otherwise. Mind you, I liked heat shrink pots and the BICC Pyrotennax two part plastic pots [I will post some pics if I can find them]
Whilst on the subject of MICC; anybody remember ALCuMICC?...now that WAS cr4p!
..............rant finishes.
