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).
Wiring diagram for a semi-earthed electrical system.
| Identifier | WestWitteringFiles\K\October1923\ Scan80 | |
| Date | 5th December 1922 | |
| DIAGRAM OF SEMI-EARTHED ELECTRICAL SYSTEM STARTER MOTOR RELAY CIRCUIT IGNITION LAMPS LAMPS HORN BODY LIGHTS. DISTRNG FUSES. INSP LAMP PLUG SOCKET INSTR LAMP CHARGING SWITCH FIELD FUSE DYNAMO F CUT-OUT Sh. Se. A.{Mr Adams} STARTER MOTOR EARTHING OR EMERGENCY NEGATIVE FUSE E.F.C. 5.12.22. | ||