Which of the following is NOT a rule for drawing a ladder diagram?

In a ladder diagram, the rules and conventions provide a clear structure that aids in understanding and troubleshooting electrical circuits. One important aspect of ladder diagrams is that each rung, which represents a control circuit, can indeed have multiple outputs. This allows for more complex control strategies where several devices can be activated or deactivated simultaneously from the same rung based on the conditions defined by the inputs.

The statement regarding outputs suggests a limitation that isn't consistent with standard ladder logic practices. Each rung can be designed to lead to multiple output devices, which is essential for various control scenarios where multiple actions may need to be taken in response to a given set of conditions.

In contrast, other rules mentioned serve essential functions. For instance, allowing multiple input devices on a single rung is crucial for integrating various sensors and switches that influence the output actions. Rungs being drawn parallel ensures clarity and organization within the diagram. Additionally, starting the diagram with a power source is foundational, as it clearly indicates the source of energy for the entire control circuit.

This structured approach is vital for ensuring that anyone reviewing the ladder diagram can easily follow the logic and understand how the control system will operate. Thus, the idea that each rung can only have one output device is inaccurate within the context of creating effective ladder