You can find the Code requirements for switches in Art. 404. The rules for the position and connection of switches are outlined in Sec. 404.6. As per 404.6(A), "Single-throw knife switches shall be ...

Electronic devices are built from many different parts. Understanding how these components work together is key to understanding electronics. Circuit diagrams use symbols to represent each component, ...

These designations spell out the number of contacts and how they behave during operation. For instance, a basic on/off light switch is an example of a single-pole (i.e., one-circuit) single-throw (i.e ...