According to ASME standards, what type of receptacle is required in the upper and lower truss?

The requirement for a lighting 115 VAC receptacle in the upper and lower truss according to ASME standards is related to ensuring safety and functionality during maintenance and emergency situations. This type of receptacle provides necessary power for lighting in areas that may otherwise be dark or difficult to access, enhancing visibility for maintenance personnel. Proper lighting is crucial for conducting inspections or repairs safely, allowing operators to see clearly while working on or around escalator components.

The choice of a 115 VAC receptacle ensures compatibility with standard lighting equipment, making it easy to provide temporary lighting solutions when needed. This helps in preventing accidents and improving overall safety during maintenance activities.

Furthermore, while other options like mainline disconnects, combined power connections, and emergency power outlets may serve various functions in power distribution and safety, they do not directly address the specific need for lighting in key operational areas of the escalator. This focused requirement for lighting enhances the maintenance environment and adheres to safety standards outlined in ASME guidelines.