In the United Kingdom, the earth wire was green and yellow (or bare), the live wire was red, and the neutral wire was black. In America, those colors are reversed.
All metal wiring should be connected to the neutral bus bar or circuit breaker panel. If you're not sure which is which, call a professional electrician. Neutral wires cannot be used as a ground wire unless they're also white or grey.
It's important to distinguish between live and neutral wires because they do not play equal roles in preventing electrical shock. Live wires must always be kept away from children. They can cause serious injury if contacted by their metallic surface. Neutral wires do not need to be kept out of reach of children; they are usually only used for physical connection of appliances to provide power or electronics equipment.
If you're not sure whether or not your wiring is correct, have a licensed electrician check it for you before any work starts on your project. This will help prevent any accidents from happening while they make the necessary changes to update your wiring system.
Green and yellow earth wires will be used (or sometimes bare in old systems). In contemporary systems, the live wire is brown, while in older systems, it is red. In contemporary systems, the neutral wire is blue, but in older systems, it is black. A white or hot wire is also present in most homes.
The term "live" means a voltage is flowing into the conductor from the public utility company's main line, which would be the case with an electrical appliance such as a light switch or radio. The term "neutral" means there is no voltage on the conductor, so it can't carry current; instead, it transfers power between different parts of the circuit. Neutral conductors are always white or grey, except where they're not split up into two separate branches (which would make them red and black). Earth conductors are always green or yellow.
In addition to these three conductors, some systems may have four or more. A fourth conductor is called a "trunk" or "third" wire and connects two-room outlets on the same branch circuit. This allows you to connect multiple appliances without having to connect each one to its own outlet.
The term "main panel" refers to the area of a house where the wiring enters the building through a meter box or similar device. Main panels are usually located in areas that are accessible after a storm has passed.
Black Wires are color coded as follows: green for earth, red for live, and black for neutral. The black wire can be found anywhere in your home wiring system.
Neutral should always be white or grey because if it's not then there could be a chance that it might get mixed up with other wires at some point. This could cause a problem when you need to use it as earth because instead of it grounding out the body, it will stay energized which could be dangerous if you're not careful enough. Neutral should always be marked on houses built after 1990; if it's not then either replace it now before something happens or have a qualified electrician check your house's wiring later when you have a spare moment.
If you're lucky enough to live in an older house then yes, black wires were originally colored silver back then green was added as an alternate. You should be able to find all the silver wires but if not then they may have been replaced during renovations. If you're unsure about any particular wire then just remember these colors: if it's not one then it's the other; if it's green then it's safe; and if it's black then it must be connected to a ground.
The term "green-yellow" refers only to the fact that those are the colors of ordinary ground wires. They could just as easily have been white or any other color.
The term "earth" means a circuit that returns power to its source after all the major appliances are off. This is usually done with a three-wire system: one pair for live current (black or red), one pair for dead current (white or grey), and the third (neutral) to service both circuits. If you check your house wiring, you should find that most houses are still wired this way. A four-wire system is also common on farms and other places where there are many power tools operating at once. On a four-wire system, an additional green or yellow conductor is added to allow each tool a separate path to ground.
In general, any conductor can be used for electrical earth if it has a good connection to ground. It may be a metal rod running through the center of the room, or it may be a carpet pad, or even a wooden floorboard. As long as it makes contact with the ground somewhere, it can serve as an earth line.
Dave, an Electrical Safety Expert, responded. The living red turns brown. The neutral black is transformed into blue. The earth's cables remain green and yellow. These colors should be used on all equipment that might be connected to the wall socket.
Red means STOP! This is a danger signal. If you are working with electricity, even if it is only testing wires, never touch any metal object that is red. It could be a warning sign that something is wrong with the circuit board in your hand or wire you are working with may have been damaged by water or other contamination. Always check the wiring diagram for any household appliance you're considering buying to make sure you're not putting yourself or others at risk of harm due to exposed wiring.
Black means DANGER! This is also a warning signal. Like red, if you come across black in a home wiring system, it is important to assume that it can harm you if you touch it. Remove or cover any black wires immediately so they will not conduct electricity to your hands.
Neutral means DO NOT TOUCH! Neutral power carries current from the line voltage back to the source.