A knife switch consists of a lever and one or more sets of __________.

A knife switch is an electrical switch that utilizes a lever mechanism to connect or disconnect electrical circuits. The term "contacts" refers to the conductive parts within the switch that create the electrical connection when the switch is closed. These contacts are crucial because they enable the flow of electricity through the circuit when the switch is activated, making it possible to either complete or interrupt the circuit.

The design of a knife switch allows for a clear and visible indication of whether the circuit is open or closed. When the lever is pulled down, the knives of the lever make contact with the fixed conductors, thus completing the circuit and allowing current to flow. Conversely, when the lever is lifted, the knives disconnect from the contacts, breaking the circuit.

Understanding the function of contacts in a knife switch is essential for grasping how such switches operate in both industrial and residential electrical systems. Knife switches are often used where reliable manual control of a circuit is necessary, and the visibility of the switch position is an important safety feature.