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An electrical conduit is a tube used to protect and route electrical wiring in a building or structure. Electrical conduit may be made of metal, plastic, fiber, or fired clay. Most conduit is rigid, but flexible conduit is used for some purposes. Conduit is generally installed by electricians at the site of installation of electrical equipment.
Cross section diagram of standard strut channel. Basic strut channel comes in the open box section 1 + 5 ⁄ 8 in (41 mm) square. A half height 1 + 5 ⁄ 8 in × 13 ⁄ 16 in (41 mm × 21 mm) version is also available, used mostly where mounted directly to a wall as it has significantly less stiffness and ability to carry loads across an open space or brace.
5000 ampere copper and 4000 A aluminium bus ducts. In electric power distribution, a bus duct (also called busway) typically uses sheet metal, welded metal [1] or cast resin to contain and isolate copper or aluminium busbars for the purpose of conducting a substantial current of electricity.
The first electrical codes arose in the 1880s with the commercial introduction of electrical power; however, many conflicting standards existed for the selection of wire sizes and other design rules for electrical installations, and a need was seen to introduce uniformity on the grounds of safety.
The first known use of any fiber pipe was in an experimental water delivery line in the Boston, Massachusetts, area. The pipeline, finished in 1867, measured 1.5 miles in length and was in use through 1927. Bituminized pipe was not in widespread commercial use until the late 19th century when it was used exclusively as electrical conduit. [1]
IEC 60533 Electrical and electronic installations in ships – Electromagnetic compatibility (EMC) – Ships with a metallic hull; IEC 60534 Industrial-process control valves; IEC 60539 Directly heated negative temperature coefficient thermistors; IEC 60544 Electrical insulating materials – Determination of the effects of ionizing radiation
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IEC 60364 Electrical Installations for Buildings is the International Electrotechnical Commission (IEC)'s international standard on electrical installations of buildings.This standard is an attempt to harmonize national wiring standards in an IEC standard and is published in the European Union by CENELEC as "HD 60364".
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