Under what condition can floor-mounted receptacles be used instead of wall-mounted ones?

Floor-mounted receptacles can indeed be used instead of wall-mounted ones when there is insufficient space for the latter. This scenario often arises in open floor plans or areas where wall space is limited due to large furniture, dividers, or architectural elements. By allowing receptacles to be installed in the floor, it provides a practical solution to ensure that power is still accessible in such spaces, facilitating the use of electrical devices where wall outlets would not be feasible.

The other conditions mentioned may not fully align with the primary purpose of floor-mounted receptacles, which is typically to accommodate spatial constraints rather than accessibility from the floor, suitability for high-traffic areas, or mere regulatory compliance. While factors like traffic and regulations may influence overall design and installation choices, the direct relationship between insufficient wall space and the need for flooring receptacles aligns most closely with the allowable use case in this instance.