Which of the following entries is non-required when an alarm is activated?

In the context of fire alarm systems and the documentation required when an alarm is activated, the entry regarding the identity of the building personnel who responded is considered non-required. This is because the primary goal of documenting alarm activations is to keep track of the alarm's operational status, its cause, and the response procedures.

The date and time of the alarm activation, type and location of the device, and the probable cause of the alarm are all critical factors in understanding the incident and improving future responses. These elements are essential for analyzing alarm occurrences, ensuring accountability, and facilitating further investigation if necessary. Therefore, while knowing who responded can be helpful for internal assessments and procedures, it is not a mandatory entry in the official documentation when an alarm is triggered.