Which of the following is NOT a type of distribution equipment commonly used in electrical installations?

Distribution equipment refers to various devices and systems that are essential for controlling and distributing electrical energy throughout an electrical installation. Transformers, switchgear, and circuit breakers are all integral components of electrical distribution networks.

Transformers are used to change the voltage levels of electrical energy, enabling efficient transmission over long distances and proper distribution for various applications. Switchgear provides control, protection, and switching capabilities for electrical circuits, allowing maintenance and integration of different network components without interruption to the supply. Circuit breakers serve the critical function of automatically interrupting electrical flow in case of overloads or faults, protecting equipment and preventing hazards.

Rectifiers, while important in many electrical systems, are not classified as distribution equipment. They are primarily used to convert alternating current (AC) to direct current (DC) and are more relevant in applications such as power supply design or control systems rather than in the distribution of electrical power itself. Thus, the correct identification of a component that is not typically categorized as distribution equipment is the rectifier.