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This type of wiring is commonly used for residential and light commercial construction in many countries. The flat version of the cable, with two insulated conductors and an uninsulated earth conductor (all within the outer sheath), is referred to as twin and earth. In mainland Europe, a round equivalent is more common.
When used as a coolant hose on machine tools, a hose is drawn through the inside of the gooseneck. A jet of liquid can then be metered with pinpoint accuracy. [ 1 ] Today, however, liquid or air for cooling and rinsing is usually passed through a chain of plastic fittings (articulated hose) that are fitted together like a ball joint and which ...
Seeking a safer, more efficient connection method, Marr, working in his home workshop, developed the first pressure-type wire connector. In 1914, he produced a set-screw version, the forerunner of the present-day twist-on connector used throughout North America. Ceramic twist-on connectors from the beginning of the 20th century
An automotive wiring diagram, showing useful information such as crimp connection locations and wire colors. These details may not be so easily found on a more schematic drawing. A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the ...
Some types of conduit are approved for direct encasement in concrete. This is commonly used in commercial buildings to allow electrical and communication outlets to be installed in the middle of large open areas. For example, retail display cases and open-office areas use floor-mounted conduit boxes to connect power and communications cables.
A small metal, plastic or fiberglass junction box may form part of an electrical conduit or thermoplastic-sheathed cable (TPS) wiring system in a building. If designed for surface mounting, it is used mostly in ceilings, concrete or concealed behind an access panel—particularly in domestic or commercial buildings [2].
Cable grommets. A cable grommet is a tube or ring through which an electrical cable passes. They are usually made of rubber or metal. [1]The grommet is usually inserted in holes in certain materials in order to protect, improve friction or seal cables passing through it, from a possible mechanical or chemical attack.
Tight fitting rubber grommets can also prevent the entry of dirt, air, water, etc. [6] The smooth and sometimes soft inner surface of the grommet shields the wire from damage. [ 6 ] Grommets are generally used whenever wires pass through punched or drilled sheet metal or plastic casings for this reason. [ 6 ]