What must be established when investigating an appliance suspected of causing a fire?

When investigating an appliance suspected of causing a fire, it is crucial to carefully establish both the fire pattern and the locations of the appliances involved. This step is vital as it helps investigators to determine how the fire started and progressed. Understanding the fire pattern provides insights into how the heat and flames traveled, which can indicate the source of the ignition. The relationship between the appliance’s location and the fire's pattern can reveal potential malfunctions or improper uses that might have contributed to the fire incident.

In addition, establishing the fire pattern allows investigators to distinguish between accidental fires and those that might have been deliberately set. This comprehensive approach aids in constructing a clear picture of the events leading up to the fire, ultimately supporting a complete and accurate investigation. A thorough investigation is essential for both legal implications and for enhancing safety practices to prevent future incidents.