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).
Comparison of three alternative electrical switchboard and wiring systems, including options from Lucas and Smith.
| Identifier | Morton\M22\ img114 | |
| Date | 24th July 1920 | |
| Contd. -2- EFC12/T24.7.20. we have experimented, appeared to be quite reliable and has to have a much smaller range of variation then the Lucas; in fact, a range which is considered not a bit greater then is desirable), the first alternative of the three set out below was suggested as being the most expedient. The three alternatives are :- (1) The use of a switchboard somewhat similar to the present Lucas, including the same switches and connections, but with the addition of a Weston ammeter and a main dynamo fuse, but the omission of the cutout and the field fuse, as in the Smith system the field fuse is contained in the Smith cut-out. The Smith cut-out would be used supported independently on the front of the dash, and the junction box on the front of the dash would be exactly similar to the Lucas junction box asa et present, but made by R.R. instead of Messrs. Lucas. (2) The use of the new R.R. switchbox made for the R.R. earthed wiring system, together with a new distribution board comprising all the necessary connections for both positive and negative sides, but no cut-out. (3) A complete change over to the earthed wiring system with a small R.R. distribution board, omitting the cut-out at present contained. Contd. | ||