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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] All light fixtures have a fixture body and one or more lamps.
Device for Connection of Luminaires (DCL) is a European standard for ceiling light fixtures introduced in 2005 and refined in 2009. It uses 6 ampere. DCL must carry the CE marking as per the Low Voltage Directive. DCL is only allowed to be installed with ground. Example of DCL socket.
A wire with a triangular cross-section is wound around this, so that the tips of the triangle protrude between the round wires into the inner spiral. [1] If the gooseneck is bent in one direction, the distance between the round wires is slightly larger on the outside and slightly smaller on the inside.
The basic principle is to protect the sensing wire by surrounding it with a guard conductor that is held at the same voltage as the wire so that no current will flow into or from the wire. This is typically achieved using a voltage buffer/follower that matches the guard voltage to the sensing wire voltage, or in low-voltage differential sensing ...
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 ...
Fixed posts with decorative ropes, custom printed belts, or metal wires. Often available in single, double, and triple belt/wire configurations. Retractable belt stanchions, often with heavy low-profile base to offset possible trip hazard and stanchion tipping, and often also with a slowly retracting spring-operated belt mechanism for safety.
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