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).
Approval and suggested modifications for electrical wiring and lampholders.
| Identifier | ExFiles\Box 65\2\ scan0236 | |
| Date | 5th February 1929 | |
| Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} T F.{Mr Friese} BY.{R.W. Bailey - Chief Engineer} c. SG.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} SECRET X7741a R2/M1.2.29 REC'D AT WW. 5.2.29 ----- ELECTRICAL EQUIPMENT ETC. X.7741 X.7560 Lec.2652 - Accessory Distribution Board - is approved. Double wiring seems best for the bodywork but one thinks that the lampholders and lamps should be single central contact to be interchangeable with other lamps, and strictly the twin flex should have a red wire for the positive so that all the bodies of the fittings are negative the same as the frame. I fear we cannot regulate this but it might be suggested on the coachbuilders instructions. R.{Sir Henry Royce} | ||