What common symbol is used to denote electrical outlets on plans?

The symbol commonly used to represent electrical outlets on construction plans is indeed a circle with two lines on either side. This symbol effectively conveys the idea of an electrical outlet, where the circle represents the outlet itself, and the lines signify the electrical connections extending from it. This visual representation is intuitive and easily recognizable for anyone reviewing the plans, making it clear where outlets are located throughout the space.

In comparison, the other symbols listed do not have a standard association with electrical outlets in construction drawings. The square with a diagonal line is typically used for different purposes, such as denoting a specific type of fixture or a different electrical component. The triangle pointing upwards may not have a standard meaning in this context and could confuse the reader. Lastly, a rectangle with an "E" inside may represent an electrical panel or specific equipment but is not used for outlets. Understanding these symbols is crucial for accurately interpreting construction documents and ensuring that all electrical installations are executed according to the plans.