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).
Test report on tinned copper fuse wire for a switchbox.
| Identifier | ExFiles\Box 61\2\ scan0466 | |
| Date | 21th July 1921 guessed | |
| THE LUCAS ELECTRICAL CO. LTD. BIRMINGHAM. RE FUSE WIRE FOR ROLLS ROYCE SWITCHBOX. ----------------- Tinned 40 S.W.G. The fuse wire supplied (Tinned copper .0047" Dia.) was tested by running an R.R.E.575 connected to the R.R. switch with special fuse holders. The wire fused at dynamo speed of 1,300 R.P.M. with Battery disconnected. The following figures were obtained:- Speed. | Dynamo Terminal Voltage. | Shunt Current. | Control current: 1,300. | 32 Volts. | 5.7.amps. | 11.8 Amps. With battery connected the fuse wire was O.K. ----------------- | ||