What does red wire black wire and green wire denote?
Red and black are the two separate 120V hot legs of a 240V 60Hz
supply, green is the ground. White is the neutral. (US color
coding.) === === === === === === === === Red is the 230V 50Hz
hot, black is the neutral, green is the earth or ground.
Note: Those colours became obsolete for use in the UK for
all new wiring installations done since 2006. The new colours are:
Brown is the 230V hot, blue is the neutral, green/yellow is the
earth or ground.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
If you do this work yourself, always turn off the
at the breaker box/fuse panel BEFORE you attempt to do
any work AND
always use an electrician's test meter having metal-tipped
(not a simple proximity voltage indicator)
to insure the circuit is, in fact, de-energized.
For more information see the answers to the Related
Questions shown below.