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 a single core electric cable.
| Identifier | ExFiles\Box 168b\2\ img085 | |
| Date | 13th October 1922 | |
| ROLLS ROYCE LIMITED MATERIAL: Electric Cable. SPECIFICATION NUMBER: 262 TYPE OF CORE: Single CORE SIZE: 23/36 OUTSIDE DIAMETER: .130 maximum CONDUCTOR: High Conductivity Tinned Copper Wire DIELECTRIC: One layer pure rubber. One layer white vulcanizing rubber and one layer black vulcanizing rubber. Total radial thickness of whole, .035". Rubber shall be equal in quality to First Grade Plantation Rubber. Vulcanizing Rubber shall contain at least 40% pure Rubber. Mineral fillers only to be used. Proportion by weight of sulphur shall not exceed 2.5%. PROTECTIVE COVERING: One layer of impregnated cotton braiding Orange colour. | ||