From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Specification sheet for electric cable, specifically workshop twin flex.
| Identifier | ExFiles\Box 168b\2\ img086 | |
| Date | 30th June 1920 | |
| D3/30.6.20 ROLLS ROYCE LIMITED. MATERIAL. ELECTRIC CABLE. SPECIFICATION NUMBER 263. (Workshop Twin Flex) TYPE OF CORE Single. CORE SIZE 22/38 OUTSIDE DIAMETER .115 maximum each cable. CONDUCTOR Plain High Conductivity Copper Wire DIELECTRIC Two layers of pure rubber for each core. PROTECTIVE COVERING Each core shall be protected with a layer of cotton tape, one core white and one red, braided and compounded black. The twin cables shall then be twisted together. | ||