Proliferation of standards

Proliferation of standards

During the first fifty years of commercial use of electriclm3916 power, standards developed rapidly based on growing experience. Technical, safety, and economic factors influenced the development of all wiringMCM2114P20 devices and numerous varieties were invented. Gradually the desire for trade eliminated some standards that had been used only in a few countries.MC80F0708 Former colonies may retain the standards of the colonising country, occasionally as with the UK and a number of its former colonies after the colonising country has changed itsPS21865 standard. Sometimes offshore industrial plants or overseas military bases use the wiring practices of their controlling country instead of the surrounding region. Hotels and airports may maintain receptaclesMP1412 of foreign standards for the convenience of travellers. Some countries have multiple voltages, frequencies and plug designs in use, which can create inconvenience and safety hazards.