In the case of a TRI involving electrical machinery, what assumption should be made?

When dealing with a technical rescue incident (TRI) involving electrical machinery, the assumption that it is electrically charged until proven otherwise is critical for ensuring safety. This approach emphasizes the importance of treating all electrical equipment as live until proper testing and verification confirm that it is de-energized.

This precaution is vital due to the potential hazards associated with electrical shock, which can occur even if equipment appears non-operational or disconnected. By making this assumption, responders prioritize their safety and the safety of others nearby. Proper procedures should be followed to verify that the equipment is not electrically charged, such as using appropriate testing devices and ensuring a lockout/tagout process is in place before engaging with the machinery.

The focus on assuming electrical hazards remains consistent throughout firefighting and rescue protocols, aligning with established safety standards and practices within the NFPA guidelines.