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You connect the negative cable last and connect it to ground rather than to the negative post of the battery because there may be a small spark when you make the connection. Batteries can emit a slight amount of highly explosive hydrogen gas. That spark on the negative post can cause these fumes to ignite and explode. That is why you always connect the negative cable last and always connect it to ground and not to the battery itself as a safety measure.
What else can I help you with?
Which cables go on first when jumping a car?
When jumping a car, the red positive cable should be connected first, followed by the black negative cable.
What cable is the ground on a car bat?
The black cable is the negative or ground. The red cable is the hot or positive calbe.
What color goes on what when jumping a car?
When jumping a car, the red jumper cable goes on the positive terminal of the dead battery and the black jumper cable goes on the negative terminal of the good battery.
What color is the positive cable when jumping a car?
The positive cable when jumping a car is typically red.
When jumping a car, should you connect the red or black cable first?
When jumping a car, you should connect the red cable first.
When jumping a car, do you hook up the red or black cable first?
When jumping a car, you should hook up the red cable first.
When jumping a car, does the red cable go to the red terminal?
Yes, when jumping a car, the red cable should be connected to the red terminal.
When jumping a car, what color goes on first?
When jumping a car, the red cable goes on first.
How do you know if a car has a negative or positive grounded battery?
Find the cable that is connected directly to the frame or sub-frame of the car. If it is red, then Positive is ground; If it is black, then Negative is ground. More than likely (but not in all cases) the electrical system is Negative ground.
What is the correct sequence for jumping a car - should the red or black cable be connected first?
When jumping a car, the correct sequence is to connect the red cable first, then the black cable.
When jumping a car, should the black or red jumper cable be connected first?
When jumping a car, the red jumper cable should be connected first.
When jumping a car, should the red or black jumper cable be connected first?
When jumping a car, the red jumper cable should be connected first.
