Green "Green insulated wires are utilized for grounding," says Mark Dawson, chief operating officer of Mister Sparky. The most common ground wire color is green, but "green-yellow" (green wire with a yellow stripe) and "bare" wire (copper wire without colored insulation) can also be used. If you're not sure what color wire goes where, get some blue painter's tape to mark the locations before you start wiring your house.
The old wiring system in most houses was not grounded. If you're lucky enough to have all metal wiring inside your home, then it's very important to connect each circuit to an electrical source directly. Otherwise, you might have a problem with electricity going into dangerous areas of your house when someone flips a switch or uses a doorbell button with a worn-out plastic cover.
Conducting pathways need to be kept open and free of corrosion if you want electricity to flow properly. Corrosion can occur if there's water damage to the house or if copper pipes are inside walls or under floors. The best way to prevent this is by having your house inspected by a licensed electrician at least once every five years.
If you own a business, then you know that electricity is very important. Without it, none of your equipment would work and many people would lose money every day. Electricity is made up of small particles called electrons which go around in circles, like a spinning top.
Ground wires are commonly green, although they can alternatively be wires with yellow stripes or bare copper (with no colored insulation). Ground wires, like shock absorbers, are conductors. A ground wire's goal is to provide a safe path for electricity to travel—into the ground underneath your home. If you have metal siding or a metal roof, your ground wire will also need to connect to these structures. Otherwise, any current flowing into it from one of your cables will not be interrupted by these objects and could cause damage.
The cable company must connect your house to the electrical grid, which means that it needs to bring power up to your meter in a way that doesn't break the bank. This usually involves using an electric line called the "neutral" to connect your house to the network, along with several other houses in your neighborhood. The third conductor of the cable provides a return path for electricity; it can either be used as a neutral or left empty if your service does not include three-wire power distribution.
In order for a circuit to work, there must be a complete loop created by connecting one terminal of each device to each other terminal. For example, if you were to connect the black wire of one lamp to the red wire of another lamp without making any other connections, there would be no way for current to flow and the lamps would remain off.
A ground wire is always bare, green, or green/yellow. People frequently forget to tape the wires, especially when their usage is clear. Any other wire color is bound to be a shambles. A hot should never be marked as neutral or ground. If it is, you have a shambles of wires too.
The easiest way to tell if a wire is supposed to be a ground is to see if there's another conductor next to it. If so, then it's fine. If not, find some way to connect both ends of it to prevent current from flowing through it.
For example, if you're working with an old wiring system and you come across a red wire, but there are no red outlets on the wall, you can connect both ends of the red wire to a metal junction box or power strip to stop it from passing current.
Not all circuits are required to have a ground wire. If you're confident that there's enough distance between any two wires, they can be anything else as long as you follow the proper rules for grounding. For example, if one circuit's black wire is connected to another's white wire, you've created a static discharge path and should therefore put a resistor in line with each cable to reduce the chances of damage due to electrical stress.
You may use any color wire you like as your ground wire, however most people use green. If the gadget is not for your own use, simply document it. If you're in the United States, the answer is no. However, if you remove the insulation, you may use it as a ground wire because bare wire is allowed. Be sure to wear protective clothing when working with electricity.
The reason why you should always use a white wire for ground connections is because almost all appliances and electronics are designed this way. The hot line will have black or red wires, while the ground line will have white or metal wires. If you were to connect the black line to the white line things would be really dangerous because you'd be feeding power into dead parts of the appliance. With modern appliances, the ground line is usually attached to the metal frame of the device instead of using wire; this is called a chassis ground. Chassis grounds are very important because they prevent current from flowing into your body through other routes, such as the floor or case walls.
For basic home wiring projects, any color will do. For more complicated projects you should use only neutral white or grey conductors. Other colors may cause problems if you're not careful or if you have electrical equipment that's sensitive to voltage differences. For example, if you have two circuits running through one hole in a wall and they use different colors then one circuit might get switched on when it shouldn't get switched on and it could be really dangerous.