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).
Page describing insulation testing and the results of accidental earth faults in electrical circuits.
| Identifier | Morton\M3.6\ img026 | |
| Date | 1st June 1919 | |
| To EFC. from R.{Sir Henry Royce} -2- R4/G11/6/19 Contd. contact maker makes contact. This can easily be disconnected also, when a test should shew the whole of the circuits are insulated. An accidental earth (frame) contact on the positive side of any of the circuits should only blow the fuse belonging to the earth connection! An accidental earth on the negative side should have no effect." R.{Sir Henry Royce} | ||