How many times per second does mains electricity change from positive to negative ?
Mains electricity Mains electricity Mains electricity (as it is known in the UK and Canada; US terms include grid power, wall power, and domestic power) is the general-purpose alternating-current (AC) electric power supply. It is the form of electrical power that is delivered to homes and businesses, and it is the form of electrical power that consumers use when they plug domestic appliances, televisions and electric lamps into wall outlets. The two principal properties of the electric power supply, voltage and frequency, differ between regions. A voltage of (nominally) 230 V and a frequency of 50 Hz is used in Europe, most
Mains electricity mains electric power is referred to by several names including "household power", "household electricity", "house current", "powerline", "domestic power", "wall power", "line power", "AC power", "city power", "street power". In the UK, mains electric power is generally referred to as "the mains". "For a list of voltages, frequencies, and wall plugs by country, see Mains electricity by country" Worldwide, many different mains power systems are found for the operation of household and light commercial electrical appliances and lighting. The different systems are primarily characterized by their All these parameters vary among regions. The voltages are generally in the range 100–240