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What is negative ground battery systems?

Updated: 10/24/2022
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11y ago

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Most vehicles are "negative ground" which means that the negative battery pole (marked with a minus sign "-") of an automobile, boat, truck, RV, or other fossil fuel powered vehicle is connected to the metal frame, engine, or chassis, of the vehicle.

Whereas the positive battery terminal (marked with a plus sign "+") is connected strictly to insulated wires that are protected from completing an electrical circuit between the positive and negative posts of the battery.

Since the frame and other metal parts connected to the engine, frame, or chassis are grounded to the negative terminal on the batter you can often power an electrical device by simply having one wire to the device from any positive battery terminal source and then connecting the negative pole of the electrical device to the frame, engine, chassis, or other grounded piece of metal.

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