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The toggle light switch was invented in 1916 by William J. Newton. [2] As a component of an electrical wiring or home wiring system, the installation of light switches is regulated by some authority concerned with safety and standards. In different countries the standard dimensions of the wall mounting hardware (boxes, plates, etc.) may differ.
The dimmer switch used in conjunction with a dimmable CFL must be matched to its power consumption range; [58] many dimmers installed for use with incandescent bulbs do not function acceptably below 40 W, whereas CFL applications commonly draw power in the range 7–20 W. Dimmable CFLs have been marketed before suitable dimmers are available.
When the dimmer is at 50% power, the switches are switching their highest voltage (>325 V in Europe) and the sudden surge of power causes the coils on the inductor to move, creating a buzzing sound associated with some types of dimmer; this same effect can be heard in the filaments of the incandescent lamps as "singing". The suppression ...
Legrand S.A. is a French industrial group historically based in Limoges in the Nouvelle-Aquitaine region. [ 1 ] [ 2 ] Legrand is established in 90 countries [ 3 ] and its products are distributed in nearly 180 countries. [ 4 ]
A light fixture (US English), light fitting (UK English), or luminaire is an electrical lighting device containing one or more light sources, such as lamps, and all the accessory components required for its operation to provide illumination to the environment. [1]
Electrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, sockets, and light fittings in a structure. Wiring is subject to safety standards for design and installation.
2. KFC Chicken. The "original recipe" of 11 herbs and spices used to make Colonel Sanders' world-famous fried chicken is still closely guarded, but home cooks have found ways of duplicating the ...
It requires a starter switch (below). A lamp starter, required with some inductor type ballasts. It connects the two ends of the lamp to preheat them for one second before lighting. An electrical ballast is a device that limits the current through an electrical load. These are most often used when a load (such as an arc discharge) has its ...