Line/incoming wires are always connected to the electrical panel from the bottom, while load wires are from the top. By mastering the colors used in your country, then it will be easier to identify which is line wire/hot and which is load wire. White and grey wires are neutral green with yellow stripes, green and copper are ground wires, black can be line/upstream wire, red or black are load/downstream. The easiest way of identifying the line/hot and load wires is to check the colors of the insulation. Each color on the electric wire has meaning though can, be used interchangeably the colors range from black, red, yellow, grey, bare copper, brown, blue, white, and green with yellow stripes. Most electric wires are insulated to protect the users from electric shocks. 4 Ways of how to identify the line wires and neutral wires However, there are ways of identifying the wires in the house. Sometimes it might be challenging to differentiate between the line and load wires colors in the electric circuit because different countries use different colors. Line wires supply electricity from the main power lines from the utility power company into the electrical switch/device in the building, also known as incoming wires, hot or upstream wires, and the purpose of line wires is to supply electricity to the building. Defining them will help people who have no background in the electrical field.
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