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 results of various electrical cables, detailing their performance and breakdown voltages.
| Identifier | ExFiles\Box 52\1\ Scan122 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS.) (DB {Donald Bastow - Suspensions} 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (6) 19 To Order No. WD {Mr Wood / Mr Whitehead} 92 (contd) Customer's No. and cracked badly on three of the six cables whilst the "Maconite" except for slight cracking at the surface on one or two of the cables was in very good condition. ⑨ Only one sample of "Glovertte" was in a suitable condition to test and this broke down at 10000 volts R.M.S The "Super Glover" samples were better one breaking down after 3 mins at 18600 volts. R.M.S whilst the other successfully withstood 19000 volts R.M.S. for 15 mins. Two of the best samples each of the "Helsby" and "Maconite" cables were tested and in the case of the former Signed (contd) This Sheet must be filed on completion of the work. | ||