What is the minimum clearance around the emergency oxygen supply connection (EOSC) permitted for planning?

• A. 5 feet
• B. Clearance must be 1.5x the width of the auxiliary source for service to the system
• C. 1
• D. 3 feet

Answer: (D)

The question tests the safe access and space needed around an emergency oxygen supply connection. A minimum of three feet of clearance in all directions around the EOSC is required to ensure personnel can reach the connection, handle hoses or equipment, and move safely without interfering with the connection or blocking access for emergencies. This space helps keep pathways open, reduces the chance of tripping or snagging hoses, and allows maintenance or rapid response actions to be performed without obstruction. Options that suggest more or less space or rely on a ratio to another piece of equipment aren’t aligned with standard planning guidance, making three feet the appropriate minimum.