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).
Clarifying the policy on the wiring of accessories for the J.3 chassis.
| Identifier | ExFiles\Box 178\3\ img058 | |
| Date | 4th February 1932 | |
| FROM DA{Bernard Day - Chassis Design}/LV. C. to S.E.W. MS. [Crossed out] WIRING. DA{Bernard Day - Chassis Design}/EV{Ivan Evernden - coachwork}2/42.2.32. X6082 X7741b In view of some little misunderstanding between ourselves and Derby on the subject of the wiring of accessories on the chassis we would like to again state the main points of our policy for J.3. (1) The main chassis distribution box should be in the centre of the front of the dashboard so that the switch may also be in the centre of the instrument board. This also avoids the handing of both the instrument board and the dashboard when dealing with the L. H.{Arthur M. Hanbury - Head Complaints} cars. (2) Past experience has taught us that we do not like the coachbuilder's electrician to make connections inside the chassis distribution board, but we do not object to fuses belonging to the accessories being in that board provided separate junction boxes are provided for the coachbuilder to wire up to. (3) We need two junction boxes - one on the back of the dashboard which may not be readily accessible if the fuses are in the main distribution box, and the other inside the chassis side channel in the neighbourhood of the rear upsweep of the frame. (4) We agree to the suggestion by E.{Mr Elliott - Chief Engineer} that from each of these coachbuilder's junction boxes two wires should go to two separate fuses in the main distribution box, one wire being for lighting current, and the other for heavy current such as cigar lighters. These coachbuilder's junction boxes would be simple bakelite mouldings having in them 3 terminals - heavy and low duty, and an earth terminal. We must provide an earth terminal as coachbuilders are liable to choose as an earth articles which are not strictly at earth. WST DA{Bernard Day - Chassis Design}/LV. | ||