Perspex model of a house, showing electrical ring main system
1957
Two perspex models of a house, showing ring main and radial systems of domestic electric power distribution, with cable termination box and main fuse. The model also incorporated a consumer unit, a house service pattern meter, a BNE cooker control unit, 7 plugs and sockets, a fuse spur box, a twin socket with plugs and specimens of lead sheathed, T.R.S., P.V.C. and conduited V.I.R. cables.