A bathroom is a room for personal hygiene activities, generally containing at minimum a toilet and sink. A bathroom may also contain a mirror, a bathtub or a shower, and possibly also a bidet. In North America and some other regions, it characteristically contains at least a toilet and a sink; hence in North American English the word "bathroom" is commonly used to mean any room containing a toilet, even a public toilet (although in the United States this is more commonly called a restroom). In other countries, including the UK, Australia, France, eastern Europe and Japan, homes may have a separate toilet room. In Iran almost all homes have two distinct rooms for the bathroom and the toilet room. Bathrooms often have one or more towel bars or towel rings for hanging towels. Some bathrooms contain a medicine cabinet for personal hygiene products and medicines and drawers or shelves for storing towels and other items. All forms of bathroom lighting should be IP44 rated as safe to use in the bathroom.The Roman attitudes towards bathing are well documented; they built large purpose-built thermal baths, marking not only an important social development, but also providing a public source of relaxation and rejuvenation. Here was a place where people could meet to discuss the matters of the day and enjoy entertainment. During this period there was a distinction between private and public baths, with many wealthy families having their own thermal baths in their houses. Despite this they still made use of the public baths, showing the value that they had as a public institution. The strength of the Roman Empire was telling in this respect; imports from throughout the world allowed the Roman citizens to enjoy ointments, incense, combs, and mirrors.
Not all ancient baths were in the style of the large pools that often come to mind when one imagines the Roman baths; the earliest surviving bathtub dates back to 1700 B.C, and hails from the Palace of Knossos in Crete. What is remarkable about this tub is not only the similarity with the baths of today, but also the way in which the plumbing works surrounding it differ so little from modern models. A more advanced prehistoric (15th century BC and before) system of baths and plumbing is to be found in the excavated town of Akrotiri, on the Aegean island of Thera. There, alabaster tubs and other bath fittings were found, along with a sophisticated twin plumbing system to transport hot and cold water separately. This was probably because of easy access to geothermic hot springs on this volcanic island. Both the Greeks and the Romans recognised the value of bathing as an important part of their lifestyles. Writers such as Homer had their heroes bathe in warm water so as to regain their strength; it is perhaps notable that the mother of Achilles bathed him in order to gain his invincibility. Palaces have been uncovered throughout Greece with areas that are dedicated to bathing, spaces with ceramic bathtubs, as well as sophisticated drainage systems.Electrical appliances, such as lights, heaters, and heated towel rails, generally need to be installed as fixtures, with permanent connections rather than plugs and sockets. This minimizes the risk of electric shock. Ground-fault circuit interruptor electrical sockets can reduce the risk of electric shock, and are required for bathroom socket installation by electrical and building codes in the United States and Canada. In some countries, such as the United Kingdom, only special sockets suitable for electric shavers, and electric toothbrushes are permitted in bathrooms, and are labelled as such. UK Building Regulations also define what type of electrical fixtures, such as light fittings (i.e. how water-/splash-proof) may be installed in the areas (zones) around and above baths, and showers. Contrary to some information provided with bathroom light fittings, sinks and basins do not affect bathroom zones, as a bathroom is solely defined as a room containing a bath or shower, by wiring regulations. It is still, nevertheless good practice to avoid installing unsuitable fixtures close to sinks, as damage from water splashes may occur.
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