Where should the manual shutoff valve be located when the point of delivery is outside a building?

The correct location for the manual shutoff valve when the point of delivery is outside a building is outside of the building. This placement is crucial as it allows for quick access in case of an emergency. In situations where flame effects are being utilized, having the shutoff valve easily reachable outside ensures that operators or emergency personnel can quickly shut off the fuel supply without needing to enter the structure, reducing response times and enhancing safety for both performers and audience members.

Other options may not provide the same level of accessibility and safety in an emergency. For instance, placing the valve inside the building could delay shutdown responses during critical situations, while locating it near occupied spaces might pose unnecessary risks. Situating the valve at the point of emergency shutdown could complicate accessibility if this point is not clearly defined or if it is situated in a location that requires navigating through potentially hazardous areas. Therefore, having the manual shutoff valve positioned outside the building is the most effective and safest choice according to NFPA 160 standards.