A power cable commonly used in most structures consists of 3 wires (2 wires + 1 ground) and is double insulated.
Typical green and yellow color coded wire diagram for grounding (grounding).
So that cables can be identified easily and safely, all common security codes for cabling require a color scheme for the insulation of the conductors. In a typical electrical code, some color codes are required while others may be optional. There are many local rules and exceptions, with the exception of a few cheaper manufacturers who do not make typical color variations (pink, orange, purple). Older installations differ in color codes and the colors may change as the insulation is exposed to heat, light and aging.
Many electrical codes recognize (or require) the use of green insulated wire, also marked with a distinctive yellow stripe, for safe ground connections. This growing international standard has been adopted for its distinctive appearance to reduce the likelihood of dangerous confusion of safety ground wires with other electrical functions, especially in those affected by red-green color blindness.
Standard wire colors for FLEXIBLE wires, e.g. For example extension cable, power cable (line) and lamp cable. In South Africa these cables are identified as follows:
brown - LIVE (PHASE)
blue - NEUTRAL
green / yellow - EARTH
Standard wire colors for FIXED INSULATED cable (a set of two or more electrical conductors usually connected to a ceiling, such as power cables that are used as permanent wiring in buildings that are buried in the ground, above, or in South Africa These cables are marked as follows:
red, white or yellow, blue - LIVE (PHASES)
black - NEUTRAL
green / yellow or bare copper - BOTTOM
