Electrical Wiring Diagram Plug
AC supply AC power supply symbol Supplies electrical energy. AC = Alternating Current, continually changing direction.
Principles of the physics of circuit diagrams are often taught with the use of analogies, such as comparing functioning of circuits to other closed systems such as water heating systems with pumps being the equivalent to batteries.
Lamp (indicator) A transducer which converts electrical energy to light. This symbol is used for a lamp which is an indicator, for example a warning light on a car dashboard.
Fuse A safety device which will blow (melt) if the current flowing through it exceeds a specified value.
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