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An electrical bus (sometimes spelled ''buss'') is a physical electrical interface where many devices share the same electric connection. This allows signals to be transferred between devices (allowing Information or Power to be shared). A bus often takes the form of an array of wires that terminate at a Connector which allows a device to be plugged onto the bus.

  • Buses are used for connecting components of a bus in PC s. See Computer Bus .

  • Buses are used for communicating between computers (often Microprocessor s). See Computer Bus .

  • Buses are used for distribution of electrical power to components of a system. The (usually) thick conductors used are called Busbar s. In an electrical laboratory, for example, a bare bus-bar will sometimes line the wall, to be used by the engineers and technicians for its high electrical current carrying capacity, which allows a convenient approximation to ''zero voltage'', or '' Ground '' in the US , and '' Earth '' in the UK .

  • In analysis of an electric power network a "bus" is any node of the Single-line Diagram at which Voltage , Current , power flow, or other quantities are to be evaluated. These may or may not correspond with heavy electrical conductors at a Substation .


See also Distributed Generation , Switched-mode Power Supply; SMPS .