Well, the heat is caused by amperage. Amperage is caused by voltage and ohms. If the resistance is high the amperage is low and the heat is low. John T gave the ohms for 6v and 12v coils which will prevent too much amperage. The size of the wire is pretty much independent of the heat generated so long as the total resistance of the coil is in line.
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that’s wha
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