What are the colors in a 240 Volt electrical circuit?

Answer 1

Answer for USA, Canada and countries running a 60 Hz supply service.
Flexible cords come in two basic insulation ratings 300 volts and 600 volts. Both insulation ratings have the same wire count and colours inside the outer jacket. Two of the most commonly used cords are, a three wire that has, black, white and green and a four wire that has black, red, white and green. Other flexible cords are manufactured for submersible pumps and the pump manufactures have their cords made to their specifications with multi colours for identification. Flexible cord is also known as "cab tire (tyre)". I was told that the name was associated from the rubber that was put on carriage wheels to quieten the steel rims on the cobble stone roads. The wheel rubber looks like the modern flexible electrical cords.

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A Green wire (or bare wire with no insulation) is normally the local "Ground" wire.

A White wire is normally the "Neutral" wire. It is common to both hot legs on a standard 240 Volt supply.

A Black wire can be one of the two "Hot" legs of a standard 240 Volt supply or it can be the single "Hot" wire of a standard 120 Volt supply.

A Red wire can be the other of the two "Hot" legs of a standard 240 Volt supply.

Answer for countries in Europe and other world areas running a 50 Hz supply service.
A Green/Yellow wire is normally the local "Earth" wire.

A Blue wire is normally the "Neutral" wire on a standard 230 Volt supply.

A Brown wire is normally the "Live" wire on a standard 230 Volt supply.

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS

Answer 2

A Green wire (or bare wire with no insulation) is normally the local "Ground"wire.

A White wire is normally the "Neutral" wire. It is common to both hot legs on a standard 240 Volt supply.

A Black wire can be one of the two "Hot" legs of a standard 240 Volt supply or it can be the single "Hot" wire of a standard 120 Volt supply.

A Red wire can be the other of the two "Hot" legs of a standard 240 Volt supply. A Green/Yellow wire is normally the local "Earth"wire.

A Blue wire is normally the "Neutral" wire on a standard 230 Volt supply. (In the UK this may be a Black wire if the circuit was installed before 2006.)

A Brown wire is normally the "Live" wire on a standard 230 Volt supply. (In the UK this may be a Red wire if the circuit was installed before 2006.)

<><><>

As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

Answer 3

Answer for USA, Canada and countries running a 60 Hertz supply service.
black, red,blue and neutral is white and green for ground in a perfect world!

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Red, black, blue and white are used for some three phase colour coding. For single phase house wiring the prevalent colours are red, black and white for neutral. Most cable set ground wires are bare. When discussing cable sets the ground wire is not included in the wire count as it is a non current carrying conductor.