| Reference Number | TPC/5/10/74 |
| Title | National Theatre Electrical Layout Details of Switchboards |
| Level | Item |
| Date | 14 March 1978 |
| Description | Crown House Engineering Ltd drawing number 904/729/R sheet 1 of 2. Drawn by P O. |
| Extent | 1 drawing |
| Series | Crown House Engineering Ltd (Theatre Projects Consultants Ltd) Drawings |