How many lines can a SPDT switch cut?

A Single Pole Double Throw (SPDT) switch is designed to control one circuit while allowing the user to choose between two different paths for current flow. This means that it has one input (or common terminal) and two outputs (or switched terminals). When the switch is in one position, it connects the input to one output, and when switched, it connects to the other output.

Because an SPDT switch only has one pole, it can cut or interrupt only one line of current at any given time. While it can choose between two different output lines, it does not cut through both simultaneously; it only affects the current flow on one line based on its position. Therefore, the ability of a SPDT switch to cut lines is clearly defined as one, which is why the answer is one line.

The understanding of why SPDT switches operate this way is crucial for designing and troubleshooting electrical circuits in commercial food equipment. This knowledge also helps in recognizing the functions of different switches, especially in contexts where multiple circuits may be involved, but only one is needed to be active at a time.