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The incandescent light bulb made household lighting practical, but modern homes use a wide variety of light sources to provide desired light levels with higher energy efficiency than incandescent lamps. A lighting designer can provide specific recommendations for lighting in a home. The layout of lighting in the home must consider control of ...
The first rubber-insulated cables for US building wiring were introduced in 1922 with US patent 1458803, Burley, Harry & Rooney, Henry, "Insulated electric wire", issued 1923-06-12, assigned to Boston Insulated Wire and Cable . These were two or more solid copper electrical wires with rubber insulation, plus woven cotton cloth over each ...
Permanent light fixtures, such as dining room chandeliers, may have no switch on the fixture itself, but rely on a wall switch. Fixtures require an electrical connection to a power source, typically AC mains power, but some run on battery power for camping or emergency lights. Permanent lighting fixtures are directly wired.
With lamp cord wire the ribbed wire is the neutral, and the smooth wire is the hot. NEC 2008 400.22(f) allows surface marking with ridged, grooves or white stripes on the surface of lamp cord. NEC 2008 400.22(f) allows surface marking with ridged, grooves or white stripes on the surface of lamp cord.
Other ceramic pieces would typically be used as a junction point between the wiring system proper, and the more flexible cloth-clad wiring found in light fixtures or other permanent, hard-wired devices. When a generic power outlet was desired, the wiring could run directly into the junction box through a tube of protective loom and a ceramic ...
Any AC transformer supplying such a device must be located outside zones 0–2. Since the introduction of the 17th edition of the IET Wiring Regulations in 2008, 230 V fixtures such as light fittings and extractor fans are permitted in zones 1 and 2, subject to those fixtures meeting the appropriate ingress protection ratings. [22]
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