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The United States and Canada use a supply voltage of 120 volts ± 6%. Japan, Taiwan, Saudi Arabia, North America, Central America and some parts of northern South America use a voltage between 100 V and 127 V. However, most of the households in Japan equip split-phase electric power like the United States, which can supply 200 V by using ...
The waveform of 230 V and 50 Hz compared with 120 V and 60 Hz. The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the nominal frequency of the oscillations of alternating current (AC) in a wide area synchronous grid transmitted from a power station to the end-user.
The United States National Electrical Code (NEC) specifies minimum acceptable wiring methods and materials for many states and municipalities. [2] It is sponsored by the National Fire Protection Association (NFPA) and has been periodically revised since 1897. Local jurisdictions usually adopt the NEC or another published code and then ...
In 1954, Big Bear Stores Co., Columbus, OH based supermarket chain purchased Harts Stores, [1] a department store that was operating at the time in the basements of two Big Bears. Harts experienced rapid growth, as Big Bear often opened grocery stores along with a Harts Department Store in an adjacent space as well as many free-standing ...
Ollie's Bargain Outlet Holdings, Inc., commonly referred to as Ollie's Bargain Outlet is an American chain of discount closeout retailers.It was founded in Mechanicsburg, Pennsylvania, in 1982 by Morton Bernstein and Mark L. Butler with backing from Harry Coverman and Oliver E. "Ollie" Rosenberg; the latter of whom is the namesake of the company.
A general merchant store (also known as general merchandise store, general dealer, village shop, or country store) is a rural or small-town store that carries a general line of merchandise. [1] It carries a broad selection of merchandise, sometimes in a small space, where people from the town and surrounding rural areas come to purchase all ...
In the United States it is not usually used for three phase power but for the high leg delta wiring of split-phase electric power (unknown in Europe). This allows one to choose single-phase AC power at either 110–120 volts between phase and neutral or 220–240 volts between phase and phase.
Unlike a linear power supply, the pass transistor [a] of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high-dissipation transitions, which minimizes wasted energy. Voltage regulation is achieved by varying the ratio of on-to-off time (also known as duty ...