What is the symbol used to represent a switch with a pilot light?

The symbol representing a switch with a pilot light is often depicted as a circle with a dot. This representation indicates that the switch is equipped with a pilot or indicator light that shows whether the switch is in the 'on' or 'off' position. The circle symbolizes the switch itself, while the dot signifies the pilot light, which serves as a visual indicator for the user. This is particularly important in electrical schematics, as it helps technicians and electricians quickly understand the behavior of a circuit and identify switches that provide feedback through a pilot light.

In contrast, the other options represent different electrical symbols that do not convey the specific function of a switch with an indicator light. The square with a line typically represents a standard switch without any indicator, while a triangle with a light bulb is not a standard symbol in electrical diagrams. The combination of a circle with a triangle does not represent any commonly accepted electrical component. Hence, the choice of the circle with a dot is essential for accurately conveying the information regarding a switch equipped with a pilot light.