1. diagram that shows the connections of an installation or its component devices or parts.

2. diagram that shows, by graphic symbols, the electrical connections and functions of a specific circuit arrangement.

3. diagram in the form of a vertical ladder with the outer vertical lines representing the electrical supply conductors and the horizontal steps representing each individual circuit with all component devices.

4. diagram showing where wires go. It may show physical location, terminal symbols, and color codes.

case enclosing electrical equipment and wiring which is designed expressly to prevent (1) a person from accidentally contacting uninsulated energized parts; (2) burning or molten materials from contacting adjacent combustible materials or falling onto combustible materials; (3) conductive or combustible materials from dropping on uninsulated energized parts; and (4) mechanical abuse of electrical equipment not designed or approved to withstand the intended normal use without such additional  

short circuit, either line-to-line or line-to-ground 

process of producing electron flow by the relative motion of a magnetic field across a conductor.

material having high electrical resistivity and therefore suitable for separating adjacent conductors in an electric circuit, or preventing possible future contact between conductors 

opposition that limits the amount of current that can be produced by an applied voltage in an electrical circuit, measured in ohms.

1. electrical component which adds resistance to an electrical network.

electric potential difference, measured in volts, between the terminals of any device used as a source of electrical energy, i.e., to supply an electric current.

study, control, and application of the conduction of electricity through gases or vacuum, or through semiconducting or conducting materials