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).
Block diagram illustrating a non-earthed vehicle electrical system.
| Identifier | Morton\M2.3\ img008 | |
| Date | 18th March 1920 | |
| 2 Non-earthed R.R. switch-box and Ammeter. Various circuits Distribution board with Smith cut-out Lights. Lucas Junction Box. Dynamo Battery Motor. | ||