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A linear circuit must be designed for a specific, narrow range of input voltages (e.g., 220–240 VAC) and must use a transformer appropriate for the frequency (usually 50 or 60 Hz), but a switched-mode supply can work efficiently over a very wide range of voltages and frequencies; a single 100–240 VAC unit will handle almost any mains supply ...
In such cases, voltage converters need only be specified to convert any voltage within one range, to a voltage within the other, rather than separate converters being needed for all possible pairs of nominal voltages (110–220, 117–220, 110–230, etc.)
A power conditioner (also known as a line conditioner or power line conditioner) is a device intended to improve the quality of the power that is delivered to electrical load equipment. The term most often refers to a device that acts in one or more ways to deliver a voltage of the proper level and characteristics to enable load equipment to ...
Consumer voltage converters (also known as "travel converters") are used when traveling between countries that use ~120 V versus ~240 V AC mains power. (There are also consumer "adapters" which merely form an electrical connection between two differently shaped AC power plugs and sockets , but these change neither voltage nor frequency.)
The line to neutral voltage is half the line-to-line voltage. Lighting and small appliances may be connected between a line wire and the neutral. Higher-power appliances, such as cooking equipment, space heating, water heaters, clothes dryers, air conditioners and electric vehicle charging equipment, are connected to the two line conductors.
The ground tab is designed to be attached to the outlet faceplate screw, which is supposed to be connected to the building electrical ground. A cheater plug , AC ground lifter or three-prong/two-prong adapter is an adapter that allows a NEMA 5-15P grounding -type plug (three prongs) to connect to a NEMA 1-15R non-grounding receptacle (two slots).
220 V [15] 220 V 380 V 60 Hz [16] Before standardization, socket types varied: C (very old installations), I (for air conditioners), and combinations like A/C and A/B/C. British Virgin Islands: A, B 110 V 190 V 60 Hz Brunei: G 240 V 415 V 50 Hz Bulgaria: C, F 230 V 400 V 50 Hz Burkina Faso: C, E 220 V 380 V 50 Hz Burundi: C, E 220 V
Japanese 200 V socket with earth slot, for an air conditioner (similar to NEMA 6-20) The Japanese Class II plug and socket appear physically identical to NEMA 1-15 and also carries 15 A. The relevant Japanese Industrial Standard , JIS C 8303, [ 50 ] imposes stricter dimensional requirements for the plug housing, different marking requirements ...