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Baddog

Grounding

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Baddog

In a training class at work today we got into a discussion about grounding.

In a truck the engine is grounded to the frame which is steel. To what is an inboard grounded?

Also, where does the ground from the battery go to complete the circuit?

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jk13

Truck. Engine and battery both grounded to chassis (and so connected to each other):

++++++++++++++++

Engine Battery

------------chassis---------

Boat engine grounded directly to battery:

+++++++++++++++++

Engine Battery

------------------------------

It's the grounding back to the battery that completes the circuit, not the chassis. The chassis is just a conductor like a wire.

Edited by jk13

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5inthesun

Yep and it's usually grounded by a very heavy duty strap.

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LS-One

In the old days of steel bumpers on cars, you could touch the bumpers together and jump start a car with one cable from positive to positive. Not a grand idea though.

Edited by LS-One

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Baddog

In the old days of steel bumpers on cars, you could touch the bumpers together and jump start a car with one cable from positive to positive. Not a grand idea though.

And absolutely not workable today.

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MLA

In a boat with no ground plane, alternator grounds to block to complete the circuit and the battery grounds to the block to complete the circuit.

Its funny to see cut ground wires attached to tower mounting bolts.

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