Green

3 Core and Earth Cable The internal 3-core and earth electrical cable colours comprise a live brown wire, a neutral grey wire, a green/yellow protective earth wire and an additional black conductor which we have discussed as the live line 2 wire.

US AC power circuit wiring color codes

U.S. Electrical Wiring Color Codes

• Phase 1 – Black.
• Phase 2 – Red.
• Phase 3 – Blue.
• Neutral – White.
• Ground – Green, Green with Yellow Stripe, or Bare Wire.

four wires

The blue wire, also referred to as the neutral wire, has the function of transferring electricity away from the appliance. The brown wire, otherwise known as the live wire, transfers electricity to the appliance. The combination of these wires is referred to as a circuit.

Blue wire generally refers to a type of wire or cable that is added to a hardware product at a factory in order to resolve design problems. Blue wires are also known as bodge wires in British English.

Note that the blue wire is connected to the black fan wire so that they can both be operated by the same switch. Connect the ceiling fan blue wire to both the black fan wire and the black wire from the ceiling. This connection allows both the ceiling fan and light kit to be powered by a single light switch.

The plug contains three wires – the live, neutral and earth wires. In a plug, the live wire (brown) and the neutral wire (blue) are the two wires that form the complete circuit with a household appliance. The earth wire (green and yellow) does not normally form part of the circuit and is included as a safety wire.

left

Three types of wire used are :

• live wire ( Red colour)
• neutral wire(Black colour)
• earth wire (Green colour)

The third wires of electrical sockets in home are connected to a centralized earth wire, which is buried in the ground. The system without third wire will work fine but without any safety feature!

Without the earth wire, if a fault occurs and the live wire becomes loose, there is a danger that it will touch the case. As a result, the casing cannot give an electric shock, even if the wires inside become loose.

If you are using an earthed three core cable with a unit which does not need to be earthed then the earth cable can simply be trimmed back and safely secured using electrical insulation tape.

Some appliances will only have two wires – live & neutral. These are ‘Double Insulated’ and do not rely upon the earth wire for protection. The plug is wired as above but there is no earth wire to connect, however make sure that the screw on the earth terminal is not loose.

An appliance that only has two wires will be double insulated. The wires should be connected to the neutral and live prongs of the plug. Make sure to connect live to live terminal and neutral to neutral terminal if the wires are color-coded.

If the house is not earthed, people could get electrocuted. Without an earth connection, the safety switches will not work and an electrical fault could cause a house or appliances to become ‘live’ as the current flows to earth. there is poor or no connection between the electrical wire and the earth stake.

In any electrical connection sequence you always connect the Ground first, the neutral then the hot. BUT and here is the main part of this – before making any connections you must make sure that the circuit you are working with is not energized.

In any electrical connection sequence you always connect the Ground first, the neutral then the hot.

If the hot wire comes into contact with both the neutral and the ground, then it will flow through both wires back to the source but as the ground has less resistance more current will flow through it.

When electrical wires are joined together the black wires must be hooked together, the white wires must be hooked to the white wires, and the ground wires must be hooked together. Otherwise, the circuit will not work, and will result in an electrical “short.”

Black means hot, white signifies neutral, and green indicates ground. However, if you need to rewire a light switch or a plug socket, you may occasionally come across two black wires. It’s essential that you determine which black wire is hot before proceeding.

A single black and white connected together is normal. It is part of a switch loop. A black connected to a group of whites is not normal and probably should be connected to the other blacks. It is normal to have a white connected to a group of blacks if a switch loop is used.

You can have multiple separate loads between the hot and the neutral. Each of them is connected to the hot side and the neutral side. When no device is working (drawing power), no current flows. There is never a direct connection between the hot and the neutral wires.

White Wire Labeled as Hot Sometimes a white wire is used as a hot wire—not a neutral—in a switch leg, or switch loop, between a switch and a light fixture. This means the white wire is “coded for hot.” The ground wire in the new cable connects to the switch and the fixture.

in simple way you can check if a wire is live without tester and voltmeter by connecting each wire and check which one makes light to glow and make meter machine to beep.

If the red and black wires are connected together already and energized, yes you can do that but you will need a pull chain light or a remote control, if they are not switch controlled.

If the black and red are a hot and switchleg, then if connected to the black from the fixture it would mean the light is always on. If the black and red are 220V between them, then connecting them to the black from the fixture would burn up the fixture. You need to know which wire is 120V to neutral.

The standard way to power a split-tab outlet is to run a three-conductor cable to a wall switch. The cable has a black wire, which connects directly to the circuit, and a red wire, which connects to the switch.

Connect the ground wire of the 3-wire cable to the ground wire of the 4-wire cable. Connect the black wire of the 3-wire circuit to either the red or the black wire of the 4-wire circuit. The red and black wires are the”hot” wires. Either wire can be used to power a circuit.