Which of the following is a means to indicate a receptacle is a hospital grade receptacle?

A hospital grade receptacle is indicated by the presence of a green dot. This color coding is part of the National Electrical Code (NEC) requirements, which specify that hospital-grade receptacles are designed to handle the rigorous demands of medical facilities. These receptacles have enhanced durability, are more resistant to wear and tear, and typically offer features that prevent unintentional disconnection or rapid loading of electrical devices. The green dot serves as a visual cue for electricians and facility operators to identify these specialized receptacles quickly, ensuring that they are installed in appropriate areas where patient care equipment is utilized.

The other color designations such as blue, red, or yellow do not carry the same standardization or recognition for hospital-grade receptacles, making them less effective as identifiers in healthcare settings. Each color may have specific applications in electrical systems, but the use of the green dot is clearly established for indicating hospital-grade receptacles.