Which electrical requirement must a bathroom contain?

The requirement for a bathroom to contain a shower and basin is based on functional plumbing standards commonly recognized in building codes and practices. A basin (often referred to as a sink) is essential for personal hygiene, while a shower is a typical fixture for bathing. These elements are not only necessary for the everyday use of the bathroom but also contribute to the overall sanitation and functionality of the space. Their inclusion ensures the bathroom can serve its primary purpose effectively.

While a bathtub with a heater, an exhaust fan, and a ceiling light fixture are important components that enhance comfort, ventilation, and illumination in a bathroom, they do not represent the fundamental requirements. The shower and basin are vital for meeting the basic living standards and codes applicable to residential bathrooms.