Non-grounding-type receptacles are permitted where?

Non-grounding-type receptacles are permitted in locations where grounding means do not exist. This aligns with the National Electrical Code (NEC) guidelines, which state that if there is no grounding system available, non-grounding-type receptacles are acceptable. These receptacles lack a grounding conductor, and their primary use is in older installations or in environments where the installation of a grounding system is not feasible or can be significantly challenging.

In situations where grounding means are not available, using non-grounding-type receptacles provides a level of convenience for connecting devices that do not require grounding. However, it is important to ensure that any appliances or devices plugged into these receptacles are double insulated or are of a type that does not require grounding for proper operation.

The other options, such as using raceways or situations involving high voltage, do not inherently justify the use of non-grounding-type receptacles. In environments where grounding is assured, a grounding-type receptacle is typically preferred to enhance safety and protect against electrical shock hazards.