Final answer:
During an Interior Safety Inspection on emergency power, non-essential buses such as main galley and entertainment should not be displayed on the WAP, confirming power is conserved for critical systems.
Step-by-step explanation:
When checking the Wireless Access Point (WAP) during an Interior Safety Inspection with the aircraft powered only by emergency power, it is important to verify that certain buses are not visible on the WAP. The primary buses that should not be displayed include the main galley, normal entertainment, and certain avionics buses that are non-essential, as these are not typically powered during emergency mode to conserve power for critical systems. The WAP is designed to display the status of the various electrical buses, and in emergency power mode, only essential systems are maintained. Therefore, verifying the deactivation of non-essential buses is a crucial safety procedure, ensuring that power distribution is as intended during emergency operations.