What should not be documented on an appliance in the area of origin?

The choice regarding what should not be documented on an appliance in the area of origin is based on the relevance and necessity of the provided information in the investigation process. While documenting the power supply, the position of moving parts, and the controls of the appliance contributes valuable insights into its operational status and potential failure mechanisms, capturing a photo of the appliance does not inherently provide critical analytical data necessary for understanding the fire's cause.

Documentation of the power supply can indicate whether electrical issues may have contributed to the fire. The position of moving parts is crucial as it can reveal how the appliance functioned before the incident. Likewise, noting the controls assists in understanding how the appliance was utilized or malfunctioned at the time of the fire.

In contrast, while a photo serves as a useful record, it does not convey specific technical details that can be analyzed to deduce the appliances' role in the ignition or fire spread. Thus, while visually documenting the appliance can be part of an overall investigation strategy, it is not as critical as the other forms of evidence that directly inform the fire cause and origin analysis. This distinction highlights the importance of focusing on data that provides actionable insights in a fire investigation scenario.