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).
Accessory wiring, confirming the retention of twin wiring due to the unavailability of single-pole fittings and the associated fire risk.
| Identifier | ExFiles\Box 65\2\ scan0227 | |
| Date | 24th November 1928 | |
| X7741a BY.{R.W. Bailey - Chief Engineer} )from E.{Mr Elliott - Chief Engineer} EFC.) c. to BJ. Hs.{Lord Ernest Hives - Chair} Da.{Bernard Day - Chassis Design} E3/M24.11.28. RE ACCESSORY WIRING. X.7741. X.7560 With further reference to the above, it is understood that single pole fittings for interior illumination of bodies etc. are practically unobtainable. Also that there is a danger of coachbuilders running bare earthing wires through the upholstery of cars, introducing danger of fire. In view of this R.{Sir Henry Royce} agrees that twin wiring should be retained for accessories, and that a suitable earthing stud be provided on the dash near to the accessory distribution board. E.{Mr Elliott - Chief Engineer} | ||