Some common electrical symbols are a line, which denotes an electrical wire, two lines perpendicular to each other with a dot at the intersection, which signifies two connected wires, and two perpendicular lines without ... More »

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On U.S. electric wiring charts, a white or gray electrical wire indicates a neutral power conductor wire, a green wire or green wire with a yellow stripe is a protective ground wire, and a red wire is a second hot wire i... More »

Voltage is the difference of electrical potential between two points or two objects. Without this difference of electrical potential, electricity could not be used as a power source. More »

Electrical circuits are drawn using symbols for power sources, wires and other electrical components. This is known as a schematic diagram. Electrical diagrams don't need to physically correspond to the final electric ci... More »

The key to reading an electrical drawing or diagram is understanding the meaning behind different symbols. Each symbol corresponds to a different component of the electrical system, such as wires, diodes, resistors and s... More »

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In electronics, an electrical schematic is a graphical drawing of an electric circuit in which symbols are used to represent electrical objects like batteries, inductors and resistors. Reading an electrical schematic req... More »

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The most effective way of determining if an electrical wire is hot is to test it with a voltometer. This is a device that measures the presence and power of an electric current. To ensure that an electric wire is not hot... More »

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