Basic switch configurations and symbols Feb. 3, 2005 There are standard designations and symbols that describe how electrical contacts work in specific scenarios.

Fig. 1. This revised Code requirement is now much easier to understand. 404.2(C)(2) — A neutral isn’t required where the switch box can be accessed to add or replace a cable containing a neutral ...

Electronic circuits are represented by circuit diagrams, which use symbols to depict components like resistors, capacitors, and transistors. Input components, such as push-to-make switches ...