| Description | Date | Identifier | |
| Photostat copy of an earthed wiring scheme for chassis 4 EX, with remarks on wire specifications and diagram markings. | 14th Feb 1920 | Box 61 \ 2 scan0317 | |
| Letter from Simplex Conduits Limited advising of a 10 to 14 day delivery delay on an order for Fuse Wire due to a works breakdown. | 14th Feb 1920 | Box 61 \ 2 scan0318 | |
| Supply of 30 SWG lead tin alloy fuse wire from Lucas for instrument board switchboxes. | 16th Feb 1920 | Box 61 \ 2 scan0319 | |
| Letter to Lucas Electrical Co. Ltd. regarding the optimal positioning and combination of fuses in a dynamo circuit. | 17th Feb 1920 | Box 61 \ 2 scan0320 | |
| Letter discussing issues with fuse arrangements and proposing a modification to improve reliability. | 17th Feb 1920 | Box 61 \ 2 scan0321 | |
| Suggested modifications to a distribution board, particularly concerning fuse placement. | 17th Feb 1920 | Box 61 \ 2 scan0322 | |
| Fuse current margins and experiments with insulating materials for fuse holders. | 17th Feb 1920 | Box 61 \ 2 scan0323 | |
| Suggested modifications for the R.R. distribution board. | 17th Feb 1920 | Box 61 \ 2 scan0324 | |
| Operation of fuses in an electrical system and suggesting improvements for fuse holders. | 17th Feb 1920 | Box 61 \ 2 scan0325 | |
| Letter from The Lucas Electrical Co. Ltd. discussing fuses and different dynamo models. | 24th Feb 1920 | Box 61 \ 2 scan0326 | |
| Chassis lighting dynamo, inspection lamp plugs, and dynamo protection fuses, referencing correspondence with the Lucas Electrical Company. | 26th Feb 1920 | Box 61 \ 2 scan0327 | |
| Continued discussion on plug pin design and a new fuse system from Lucas for an experimental car. | 26th Feb 1920 | Box 61 \ 2 scan0328 | |
| Specifying the correct tin lead fuse wire size for an experimental Lucas switchbox. | 16th Mar 1920 | Box 61 \ 2 scan0329 | |
| Specification sheet detailing the fusing currents for various gauges of tin-lead fuse wire used in Lucas and R.R. switch boxes. | 23th Mar 1920 | Box 61 \ 2 scan0330 | |
| The correct tin-lead fuse wire size for a distribution board. | 26th Mar 1920 | Box 61 \ 2 scan0331 | |
| From RHC to EFC regarding the brittleness of fuse holders made from various materials. | 15th Apr 1920 | Box 61 \ 2 scan0332 | |
| The unsuitability of certain brittle materials for fuse holders and a list of alternatives provided. | 16th Apr 1920 | Box 61 \ 2 scan0333 | |
| Lucas switchboxes being delivered with incorrect fuse wire that has a higher amperage rating. | 29th Apr 1920 | Box 61 \ 2 scan0334 | |
| Ignition and Klaxon failure on chassis 1.EX, attributing the fault to unreliable Lucas fuses and switches. | 1st Jun 1920 | Box 61 \ 2 scan0335 | |
| Adding a plate with short fuse instructions to the outside of a Lucas Junction Box. | 24th Jun 1920 | Box 61 \ 2 scan0336 | |
| Suggested text for a plate to be affixed to the outside of a Lucas junction box cover regarding fuses. | 24th Jun 1920 | Box 61 \ 2 scan0337 | |
| New chassis troubles, specifically concerning electrical faults and the fusing system on chassis 46-LW. | 26th Jul 1920 | Box 61 \ 2 scan0338 | |
| Undesirable electrical arrangements and faults in a vehicle's starter and generator system. | 26th Jul 1920 | Box 61 \ 2 scan0339 | |
| Instructional document detailing the comparison test conditions for three different types of fuse wire. | 2nd Aug 1920 | Box 61 \ 2 scan0340 | |
| Results of fuse tests, detailing the amperage at which fuses blew under different test conditions. | 2nd Aug 1920 | Box 61 \ 2 scan0341 | |
| Instructions regarding the analysis of current values and melting wires. | 2nd Aug 1920 | Box 61 \ 2 scan0342 | |
| Instruction note discussing the properties and current carrying capacity of different classes of wire or fuse. | 2nd Aug 1920 | Box 61 \ 2 scan0343 | |
| Modifications to a distribution board for an earthed wiring scheme. | 6th Aug 1920 | Box 61 \ 2 scan0344 | |
| Vehicle electrical systems, earthing, and the use of fuses in battery and distribution circuits. | 6th Aug 1920 | Box 61 \ 2 scan0345 | |
| Instructions for a comparison test of two different specifications of fuse wire. | 6th Aug 1920 | Box 61 \ 2 scan0346 | |
| Fuse test results for two specimens, A and B. | 6th Aug 1920 | Box 61 \ 2 scan0347 | |
| Unsatisfactory fuse wire for the Lucas Dynamo Switchboard that fuses too readily and requires retrospective replacement. | 7th Aug 1920 | Box 61 \ 2 scan0348 | |
| Specification for fuse wire to be used with Lucas Switchboards for a specific chassis alteration and dynamo. | 9th Aug 1920 | Box 61 \ 2 scan0349 | |
| Specifying the fusing current limits for fuse wire. | 11th Aug 1920 | Box 61 \ 2 scan0350 | |
| Confirming the correction of fuse wire specifications to 30 SWG Lead Tin Alloy, with added handwritten notes on fusing current limits. | 11th Aug 1920 | Box 61 \ 2 scan0351 | |
| Letter from S. Smith & Sons regarding the switchboard, dynamo, fuses, and bearings for lighting equipment. | 11th Aug 1920 | Box 61 \ 2 scan0352 | |
| Request to order four quarter-pound coils of 30 SWG lead tin alloy fuse wire. | 17th Aug 1920 | Box 61 \ 2 scan0353 | |
| EFC requesting an order for two types of tin lead fuse wire. | 19th Aug 1920 | Box 61 \ 2 scan0354 | |
| Instructions detailing the fusing current for a No. 19 swg Tin-lead fuse in a Lucas Junction Box. | 19th Aug 1920 | Box 61 \ 2 scan0355 | |
| Mr. Royce's preference for copper over tin-lead fuse wire for Lucas Junction Boxes. | 19th Aug 1920 | Box 61 \ 2 scan0356 | |
| Extract detailing electrical equipment troubles found on new imported chassis. | 19th Aug 1920 | Box 61 \ 2 scan0357 | |
| The alteration of fuse wire specification for a Lucas Junction Box. | 19th Aug 1920 | Box 61 \ 2 scan0358 | |
| Telegram enquiring about the failure mode of Smith and Lucas electrical components when a fuse blows or a circuit is disconnected. | 24th Aug 1920 | Box 61 \ 2 scan0359 | |
| Short memo to Mr. Royce regarding a machine failure due to a potential blown fuse or disconnection. | 25th Aug 1920 | Box 61 \ 2 scan0360 | |
| Copy of a telegram detailing damage to a Clark Smith Dynamo and its components. | 25th Aug 1920 | Box 61 \ 2 scan0361 | |
| Letter to Messrs. S. Smith & Sons Ltd. regarding the use of copper wire instead of tin-lead wire for the main fuse in a switchbox. | 25th Aug 1920 | Box 61 \ 2 scan0362 | |
| Letter discussing a design change to make a fuse interchangeable. | 25th Aug 1920 | Box 61 \ 2 scan0363 | |
| Telegram concerning a damaged Clark Smith dynamo due to a blown fuse in the armature circuit. | 25th Aug 1920 | Box 61 \ 2 scan0364 | |
| Protection of a dynamo-battery system using fuses. | 25th Aug 1920 | Box 61 \ 2 scan0365 | |
| The disadvantages of an electrical arrangement involving a dynamo, fuses, and battery discharge. | 25th Aug 1920 | Box 61 \ 2 scan0366 | |
| Two hand-drawn wiring diagrams for a vehicle dynamo charging system. | 25th Aug 1920 | Box 61 \ 2 scan0367 | |
| Report comparing electrical installation faults on various experimental cars. | 25th Aug 1920 | Box 61 \ 2 scan0368 | |
| Proposed new position for the distributing board for improved accessibility. | 25th Aug 1920 | Box 61 \ 2 scan0369 | |
| Fuse systems for Lucas & Smith dynamos and their overheating characteristics. | 25th Aug 1920 | Box 61 \ 2 scan0370 | |
| Continued discussion on main and field fuse arrangements for the dynamo battery system. | 25th Aug 1920 | Box 61 \ 2 scan0371 | |
| Alteration of a car's lighting installation to 24 volts and associated wiring systems. | 26th Aug 1920 | Box 61 \ 2 scan0372 | |
| Cause of overheating in a Smith Dynamo and the proposed solution of removing fuses from the circuit. | 26th Aug 1920 | Box 61 \ 2 scan0373 | |
| Cause of a Smith dynamo breakdown due to interchanged fuses and a proposed new wiring system. | 27th Aug 1920 | Box 61 \ 2 scan0374 | |
| Design of a distributing board, focusing on the dangers of incorrect fuse sizes and potential dynamo damage. | 27th Aug 1920 | Box 61 \ 2 scan0375 | |
| Note regarding circuit cutout failure due to oxidised contacts and the preference for copper fuses. | 27th Aug 1920 | Box 61 \ 2 scan0376 | |
| Design and materials for a distributing board, focusing on insulation. | 27th Aug 1920 | Box 61 \ 2 scan0377 | |
| Requesting the testing of a sample of Lucas Switchboard fuse wire for potential production use. | 27th Aug 1920 | Box 61 \ 2 scan0378 | |
| Test results for a portion of fuse wire used in a condenser production test, observing the effects of pressure on fusing current. | 20th Aug 1920 | Box 61 \ 2 scan0379 | |
| Letter from S. Smith & Sons regarding switchboards, experimental copper fuses, and the return of dynamos. | 30th Aug 1920 | Box 61 \ 2 scan0380 | |
| Testing fuse wire for a Lucas switchbox, which was found to be unsuitable. | 31th Aug 1920 | Box 61 \ 2 scan0381 | |
| From EFC to Da discussing the wiring arrangement of fuses in the dynamo main circuit. | 31th Aug 1920 | Box 61 \ 2 scan0382 | |
| Continuation of a document discussing different schemes of fuses and equivalent arrangements. | 31th Aug 1920 | Box 61 \ 2 scan0383 | |
| Suitability and specifications of a fuse wire for a switchboard. | 1st Sep 1920 | Box 61 \ 2 scan0384 | |
| Unsatisfactory fuse wire for the Lucas switchboard and the need to expedite obtaining the correct wire. | 1st Sep 1920 | Box 61 \ 2 scan0385 | |
| Request for Report No. 7 concerning troubles with new chassis 46-LW. | 2nd Sep 1920 | Box 61 \ 2 scan0386 | |
| Letter from Rolls-Royce of America suggesting the addition of a fuse to the lamp circuits due to fire risk and potential insurance issues. | 19th Aug 1920 | Box 61 \ 2 scan0387 | |
| Suggestion to consider cartridge-type fuses over the current designs which are difficult to replace on the road. | 3rd Sep 1920 | Box 61 \ 2 scan0388 | |
| Explaining the decision not to include fuses in the lamp circuits of post-war cars using the Lucas electrical system. | 3rd Sep 1920 | Box 61 \ 2 scan0389 | |
| Letter from S. Smith & Sons regarding the position of the main fuse on switchboards being manufactured, suggesting a separate experimental fuse box. | 6th Sep 1920 | Box 61 \ 2 scan0390 | |
| Standardization of electrical fuses to a single gauge copper wire. | 6th Sep 1920 | Box 61 \ 2 scan0391 | |
| New wiring scheme and distributing board design for the 6 EX model. | 6th Sep 1920 | Box 61 \ 2 scan0392 | |
| Positive side of an electrical circuit and its protection. | 6th Sep 1920 | Box 61 \ 2 scan0393 | |
| The electrical installation on a chassis, specifically the fuse system and dynamo protection. | 10th Sep 1920 | Box 61 \ 2 scan0394 | |
| Instructions detailing available sizes of copper wire for experiments on fuses. | 28th Sep 1920 | Box 61 \ 2 scan0395 | |
| Letter discussing the suitability of American electrical components, like fuses and cutouts, for a chassis. | 28th Sep 1920 | Box 61 \ 2 scan0396 | |
| Drawing of a typical fuse installation, detailing its components and dimensions. | 20th Sep 1920 | Box 61 \ 2 scan0397 | |
| Instruction sheet detailing tests on two specimens each of different gauge wires. | 20th Sep 1920 | Box 61 \ 2 scan0398 | |
| Instruction sheet detailing fusing current test results for two different wire gauges. | 30th Sep 1920 | Box 61 \ 2 scan0399 | |
| Test report on gauge wire, detailing issues with a fuze carrier and listing fusing current measurements. | 30th Sep 1920 | Box 61 \ 2 scan0400 | |
| Instruction sheet detailing fusing current tests for different wire gauges. | 30th Sep 1920 | Box 61 \ 2 scan0401 | |
| Instruction sheet detailing the results of fusing current tests on a 19 S.W.G. wire. | 30th Sep 1920 | Box 61 \ 2 scan0402 | |
| Properties and selection of appropriate fuse wire. | 1st Oct 1920 | Box 61 \ 2 scan0403 | |
| The suitability of wire samples for a switchbox based on their fusing current. | 11th Oct 1920 | Box 61 \ 2 scan0404 | |
| Results of tests on a Smith dynamo and comparing different exciting circuits and fuse systems. | 5th Oct 1920 | Box 61 \ 2 scan0405 | |
| Continued document discussing the design of a hand-wound armature for a dynamo. | 5th Oct 1920 | Box 61 \ 2 scan0406 | |
| Recommendation for fitting additional fuses for body lighting circuits. | 6th Oct 1920 | Box 61 \ 2 scan0407 | |
| Required specifications for fuse wires for the chassis switchbox and junction box. | 8th Oct 1920 | Box 61 \ 2 scan0408 | |
| Letter to a supplier rejecting fuse wire samples and requesting new ones with specific fusing properties. | 11th Oct 1920 | Box 61 \ 2 scan0409 | |
| Letter confirming the satisfactory testing of a 30 SWG fuse wire sample from the London Electric Wire Company & Smiths Ltd. | 11th Oct 1920 | Box 61 \ 2 scan0410 | |
| Inadequacy of Lucas electrical components and the development of new in-house switches and fuses. | 22th Oct 1920 | Box 61 \ 2 scan0411 | |
| Letter regarding samples of 19s and 20s Pure Tin Wire for Fuse Wire Junction Boxes. | 25th Oct 1920 | Box 61 \ 2 scan0412 | |
| Test results for two specimens of fuse wire for a Lucas Junction Box. | 26th Oct 1920 | Box 61 \ 2 scan0413 | |
| The testing of two different gauges of pure tin fuse wire to determine their fusing currents. | 27th Oct 1920 | Box 61 \ 2 scan0414 | |
| Specifying the use of 19 SWG pure tin fuse wire for the junction box after testing samples. | 11th Nov 1920 | Box 61 \ 2 scan0415 | |
| Test report on the fusing currents of copper fuses in a PR Distribution Box. | 9th Nov 1920 | Box 61 \ 2 scan0416 | |
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