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 fusing currents for two different gauge copper wires.
| Identifier | ExFiles\Box 61\2\ scan0472 | |
| Date | 18th August 1921 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 X.2515. ROLLS-ROYCE LIMITED. INSTRUCTIONS. To E.F.C. Order No P.B.15 Customer's No. X 2515. Date Aug 18th 1921 X.2515 Comparison of Fusing Currents of Two Different Gauge Copper Wires. Copper Wire. 30 S.W.G. Dia:- .0124" Test | Fusing Current 1 | 26.0 2 | 27.0 3 | 27.0 4 | 28.0 5 | 28.0 6 | 28.5 Tinned Copper Wire Between 30 + 31 S.W.G. Dia:- .012" Test | Fusing Cur 1 | 29.0 2 | 27.0 3 | 28.0 4 | 27.0 5 | 26.5 6 | 26.0 It was noticed early in the tests, that, owing to the fuse holder not properly gripping the fuse, slight sparking took place at the connection. The holder was subsequently changed for another. Signed C.F.R. This Sheet must be filed on completion of the work. | ||