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Allis Chalmers Discussion Forum

simple explanation on ammeters vs voltmeters...

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BCnT

04-06-2007 21:40:50

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i'm sure everybody has heard the old saying that volts dont kill during an electocution...its the amps that fry ya.
ammeters carry full charging load thru a resistance coil that heats up when system is charging [sort of like the coil in a toaster oven]
sometimes the voltage regulator will stick resulting in a heavier load on the ammeter and the coil on the meter gets hotter and starts to glow...wire insulation,rats nests,bird nests,any kind of debris near ammeter catches fire and by the time you see smoke or flames its too late unless you've got an extinguisher...dont forget that fuel tank sitting rite above meter either.

voltmeter just measure voltage...no heat

to install a volt meter run 1 side of meter to ignition terminal on switch and other lead to ground [if it doesnt work or works backwards reverse leads]
hope this helps

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