Depending on what you are working on, red and black have different meanings.  I have come across this a bit in my life and want to take note of it, finally.


Black = Profit

Red = Loss


Black = Ground

Red = Volts


Black = Live

White = Neutral

Green = Ground


Coming from a knowledge base in electronics, the electrical color-coding is completely confusing.  Came across an article from Angie’s List with more details.