| Description | The file contains Theatre Projects Consultants Ltd correspondence with consultants, contractors and vendors regarding the electrical installation, such as external cabling, remote control facilities in the main switchboard, drum revolve switchgear and lighting, at the National Theatre. Areas covered include electrical loads (tabulated); technical earth; the issue of drawings and architects' instructions; power factor correction; quotations, particularly from Varilectric Ltd; the purchase of parts; finishes; the architect's lighting plans and requirements; power factors and harmonics; manuals; motors; and circuits (diagrams). Correspondents include Flint & Neill Ltd; Varilectric Ltd; Mole Richardson (Stage & Studio Engineering) Ltd; Denys Lasdun & Partners; Sir Robert McAlpine & Sons Ltd; Evershed Power-Optics Ltd; Hall Stage Equipment Ltd; Derek Mardon (Electrical Clerk of Works); Tele-Stage Associates Ltd; the National Theatre; Ascog Ltd; Thorn Lighting Ltd; Ajax Sprays Ltd; Rank Strand Electric Ltd; Metropolitan Tool & Products Ltd; London Electricity Board; Niphon Ltd; Dorman Smith Switchgear Ltd; Dorman Smith Controlgear Ltd; Julius Sax & Co Ltd; Crown House Engineering Ltd; Relite Electric Ltd; Lucas Metal Working Co Ltd; Jones + Jennings Ltd; Londex Ltd; British Insulated Callender's Cables (BICC) Ltd; Technicom Ltd; Wheeler Crittal Berry Ltd; and the Greater London Council (GLC). The original card folder has been disposed of. '904/7B (2) the National Theatre Electrical Installations' was written on the spine. |