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).
Instructions for fuse replacement and fault finding in a junction box.
| Identifier | ExFiles\Box 26\2\ Scan126 | |
| Date | 19th July 1917 guessed | |
| -12- Contd. JUNCTION BOX. When occasion demands the replacement of a fuse in this box, spares will be found in the little container inside the cover, and care should be taken that the wire is straight in the fuse holder and firmly gripped. Carefully inspect these fuses occasionally, and renew in the event of any irregularity. The positive or right hand fuse will be the morelikely to become melted in service, as the permanent earth connection of the electrical system is effected on the bar supplied with current through this fuse. Failure on this fuse indicates the occurrance of an earth upon some conductor (coloured black on diagram) in direct connection with the negative terminal of the battery or else a direct short circuit from bar to bar which may take place in carelessly removing or replacing the cover. It is unlikely that the negative or left hand fuse will go but such would indicate an earth on the negative bar in the box, or in connections thereto, or again, a direct short circuit from bar to bar. Contd. | ||