why use of black color for electrical Power cables ?
Electrical cables are made in all colors. The black is least expensive.
Someone had to make a choice and black was it. Black and red are the hot wires. White and green are neutral. Update: Lee26Loo may be right about color being different for different countries, but you asked about a black wire so I assumed you are in USA.
coz some materials are added for better quality and durability like carbon black which protects from UV radiation. -----------------
It's an arbitrary choice. In the US, black or red is hot, white is neutral, green if ground. Other countries have different color combinations.
