# Question: Do I Hook Up The Negative Or Positive First?

## What happens if positive and negative wires touch?

When the wires are connected, it forms a short circuit, with extremely high amounts of current flowing through the wire due to the negligible resistance of wires.

This causes sparks..

## Why do you connect the positive terminal first?

Connect positive first, negative having less potential won’t 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 I have to disconnect both battery terminals?

Unless both sides of a battery are connected (both positive and negative) then the battery has NO impact on what occurs. Electrons need to go somewhere. But if the positive side of the battery is disconnected, there is NO WAY for those nasty little electrons to sneak away from the battery.

## Which terminal do you disconnect first on a car battery?

You should always remove the negative battery terminal first, to reduce the risk of sparks which can make the car battery explode. Once the negative terminal has been located, use the wrench to loosen the nut that holds the terminal.

## What order do you take jumper cables off?

Disconnect the cables in the reverse order: First remove the negative cable from the car you jumped, then the negative cable from the car with the good battery. Then remove the positive cable from the car with the good battery (don’t touch a grounded part of either car with the clamp of the positive cable).

## What happens when you jump a car the wrong way?

When you jump start your car the wrong way, there are many things that could possibly happen. The battery, jumper cables, and electronics will be damaged, including the fuse and the sensors. There is even a risk of explosion when the problem is at its worst. … In most instances, you need to check the fuse.

## How do you tell positive and negative on a battery?

Each battery has two metal terminals. One is marked positive (+), the other negative (-). There are also positive and negative cables in the jumper cable set. The red one is positive (+), the black one is negative (-).

## What happens if you connect the negative terminal first?

If you first connect the negative cable, then when you connect the positive cable there is a chance the wrench will complete a circuit between the battery and the chassis of the car. … If the battery is offgassing, the spark could ignite those gases causing an explosion.

## Do I connect power or ground first?

If both wires are already hooked up you are better off hooking the power wire up first because the heatsink of the amp will be internally connected to the ground.

## What happens if you disconnect positive first?

If positive terminal is removed first then chances of a spark are more if this terminal touches the body through the metal spanner or wrench you are opening with is grounded accidentally and may end in flames because lot of combustible material is around. And chances of this accidental touch are very high.

## Do you connect red or black first?

Safety: Always remove the negative cable first, then the positive cable. When you connect the battery, connect the positive end first. Here is the order: Remove black, remove red, attach red, attach black. Ensure that the connections on both end are secure by trying to move the battery around.

## What happens if you cross positive and negative wires?

No, the speaker won’t suffer any damage. In a stereo configuration, reversing polarity of one speaker and not doing it to the other channel will give you a very thin sound; you’ll notice an obvious lack of bass due to the acoustic cancellation of low frequencies. You may detect anomalies in the midrange as well.

## When boosting a car which cable goes on first?

The safest order to attach the jumper cables is as follows: Attach one red jumper cable clamp to the positive terminal on the dead battery. Attach the other end of the same cable, the second red jumper cable clamp, to the positive terminal on the working (live) car battery.

## What happens if you put positive on negative?

What happens if you accidentally interchange the positive and the negative clamps? A rapid spike in the electrical power from the donor battery will damage the dead battery and the vehicle’s electrical systems. … The clamps are assigned to either the negative pole or the positive pole on the battery.

## What happens if you connect positive to negative?

Connecting the positive terminal of each battery to the negative terminal of the other battery will result in a huge surge of electrical current between the two batteries. … The heat can melt internal and external battery parts, while the pressure from the hydrogen gas can crack the battery casing.

## Can you touch a live wire without getting shocked?

If You are standing on a rubber mat or any other non conductive material, You can touch a live electric wire with one hand without getting an electric shock. … The birds land on live electric wires of a variety of Voltages, and don’t get electric shock.

## What happens if you don’t disconnect the negative battery cable?

The electrical power in a car’s engine is activated by the battery. Contact between the negative battery terminal and the battery, even if the cable is not clamped onto the battery, may reactivate the electrical system within the car.