The symbol for a thermal overload is represented by which symbol?

The symbol for a thermal overload is correctly represented by a rectangle with an electricity bolt. This symbol is commonly used in electrical schematics to indicate a device that protects equipment from overheating due to excess current. The rectangle shape signifies an enclosure or device, while the lightning bolt inside indicates a connection to electrical power.

In electrical diagrams, this symbol helps technicians and engineers quickly identify thermal overload devices that interrupt power when a preset temperature limit is exceeded, preventing potential damage to motors and circuits. Understanding this representation is vital for anyone working in electrical fields, as it aids in the interpretation of wiring diagrams and ensures the proper installation of protective devices.