Connect positive first, negative having less potential wont arc. The higher the voltage, the greater the chance of arcing and fusion. On a car if negative first and you are touching any metal part of car, when attaching positive there is possibility of arcing through you. Your body becomes part of the circuit.

Do you connect the positive or negative terminal first?

“Positive first, then negative. When disconnecting the cables from the old battery, disconnect the negative first, then the positive. Connect the new battery in the reverse order, positive then negative.”

Why do you connect positive to positive?

All voltage is relative, so your reasoning is correct. If you connect two positive but non-equal voltage nodes together, current will flow between them. Calling something positive only means that it has a higher voltage potential than something else which you are using as a ground reference.

What does the positive terminal connect to?

Look for the car battery terminals. They connect to the batterys positive and negative posts. The positive terminal in most cases has a red cover and is connected to the post on the battery that is stamped by a plus sign. The negative terminal is connected to the post on the battery that is stamped by a minus sign.

What color is the positive terminal?

red The red one is positive (+), the black one is negative (-). Never connect the red cable to the negative battery terminal or a vehicle with a dead battery.

Is it OK to just disconnect the negative terminal?

Do not let the negative and positive cable ends touch under any circumstances. If the cables do make contact or even get close, it could do a number of harmful things to your car, including frying your alternator, damage the cables, or worse, cause serious injury to yourself or others.

Do you connect positive to negative in a circuit?

The positive side of a battery is only positive in relation to the negative terminal of the same battery. When you hook a wire from the positive terminal of the first battery to the negative terminal of the second, a very small amount of current will flow until the potential difference reaches zero.