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.
The active wire (high potential) is brown in color (it used to be red). Blue is the color of the neutral wire (low voltage). The earth wire is green and yellow striped (it used to be only green).
An electrical system is called neutral-grounded if the ground conductor is also called a neutral. This provides an alternative path for current to follow in case of a problem with one branch. The normal situation is that there is no direct connection between any two wires in the system. Any metal object such as a water pipe will act as a ground and keep current from flowing into or out of it. But just like any other part of the house wiring, each circuit must have its own neutral. If a single conductor serves as both hot and neutral, then when you turn off one light, the other lights go out too because they're connected to the same terminal on the wall switch.
In most homes, the neutral conductor is white or grey, while the hot conductor is black or red. However, this is not required by law and other combinations are common as well. For example, some black conductors are also used as neutrals, while others are dedicated to heat only. Still other colors are used for neutral and hot; for example, blue and white or green and yellow.
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. Any other colors of wires should not be connected to each other or to any metal object.
The term "live" means that if you were to connect this wire to a light socket, electricity would flow through it and into the lamp holder. The term "neutral" means that this wire does not carry current directly; instead, it connects one side of a circuit to another side of a circuit. If you were to connect both ends of the neutral wire to light sockets, electricity would flow through both sets of cables and nothing would happen to the lights. The term "grounded" means that this wire is connected to something metal, such as a house wall, for example. This wire can be any color, but it should not be used as a hot wire because it will then carry current and need to be connected to a light socket as well.
Any metal object should never be connected to a power line. This includes metal objects inside your home such as metal pipes and metal roof beams. If you were to touch these wires to a power source such as a battery or generator, you could get serious injuries from high voltage electricity.
How did the wire colors in the United Kingdom change?
|Old Colour||New Colour|
|Live Red||Live Brown|
|Neutral Black||Neutral Blue|
Why are there multiple colors of wiring? The neutral wire is the blue wire, and its duty is to take power away from an item. The brown cable, sometimes known as the "live wire," is responsible for delivering power to your appliance. These two wires make a complete electric circuit when they are connected together. If you were to connect them to a battery, electricity would be able to flow through the cable in both directions.
The white wire is the third conductor in the cable and it should never be connected to anything. It's used for signaling purposes only. If something is plugged into a white socket but not wired to the wall outlet, a signal will be sent out to notify other devices that something is attached to this particular plug.
In addition to these three conductors, some cables have a green conductor as well. This additional conductor is used to send a signal out when something is plugged into one of those green sockets. For example, if there was a green light plugged into a wall outlet, then that means that the lights on another floor of the building are on too. There would be no need for someone to walk between the two floors to turn off the lights because they could do so from either end using the green plug!
The presence of a fourth conductor indicates that the cable in question is made up of four separate wires that are used for sending signals about hot plugs or appliances that are plugged in.