| Description | The file contains correspondence and enclosures sent mainly between Theatre Projects Consultants Ltd and Rank Strand Electric Ltd regarding their contract (direct contract no. 5) and variations on it, specific topics include the appointment of the National Building Agency (NBA) to expedite the installation period; racks for foyer lighting dimmers; start dates and site access for Rank Strand Electric Ltd; Upper Theatre dimmer installation and damp problems in the dimmer room; lighting control desk communications facilities; Lyttelton Theatre luminaires; installation timetable for the Lower Theatre; working and environmental conditions in the Lower Theatre control room and areas in which the Lightboard is to be installed; quotations for additional work; working light wiring; load tests; dimmer tests; safety lighting dimmer; progress meetings for the Olivier installation; emergency lighting; defects; modulation panels; Lightboard mains supply protection; Lightboard commissioning and handover; progress of remedial works on the Lightboard; Rank Strand service charges; colour change, pan and tilt focus equipment; and the remote control system. Other correspondents include the National Building Agency (NBA); Sir Robert McAlpine & Sons Ltd; the National Theatre; Denys Lasdun & Partners; and BD Engineering Services Ltd. Items include temperature charts for the control room, dimmer room and memory room; drawing number 1D16861 'DC Dimmer By Pass'; a report on Transformer Fed Dimmer Loads. Original card folder disposed of. 'Direct Contract - Rank Strand.' was written on the front.
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