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2. Sleeve (construction) - Wikipedia

   en.wikipedia.org/wiki/Sleeve_(construction)

   Notice the sleeves, fastened to the timber forms before the concrete is cast. improper sleeving in a drywall assembly. In construction , a sleeve is used both by the electrical and mechanical trades to create a penetration in a solid wall, ceilling or floor.

3. Cable management - Wikipedia

   en.wikipedia.org/wiki/Cable_management

   Cable strain relief is a mechanical protection for flexible electrical cables, wires, conduits and pneumatic hoses. It is regulated by the European standard EN 62444 (formerly EN 50262. [2]). With a strain relief component, the connection between a flexible electrical line and its connection port is protected against mechanical stress. Usually ...

4. Housing (engineering) - Wikipedia

   en.wikipedia.org/wiki/Housing_(engineering)

   A transparent plastic housing around an electronic device. In engineering, a housing or enclosure is a container, a protective exterior (e.g. shell) or an enclosing structural element (e.g. chassis or exoskeleton) designed to enable easier handling, provide attachment points for internal mechanisms (e.g. mounting brackets for electrical components, cables and pipings), maintain cleanliness of ...

5. Bowden cable - Wikipedia

   en.wikipedia.org/wiki/Bowden_cable

   A cable passing around a sharp bend tend to furrow the inner cable sleeve, leading to contact with the outer housing and rub fraying. A frayed cable can suddenly break when force is applied strongly, e.g. during emergency braking, or it can get stuck in the outer cable, leading to sudden unintended acceleration if it is a throttle control cable.

6. Electrical conduit - Wikipedia

   en.wikipedia.org/wiki/Electrical_conduit

   Electrical conduit provides very good protection to enclosed conductors from impact, moisture, and chemical vapors. Varying numbers, sizes, and types of conductors can be pulled into a conduit, which simplifies design and construction compared to multiple runs of cables or the expense of customized composite cable.

7. Knob-and-tube wiring - Wikipedia

   en.wikipedia.org/wiki/Knob-and-tube_wiring

   The conduit methods were known to be of better quality, but cost significantly more than K&T. [2] In 1909, flexible armored cable cost about twice as much as K&T, and conduit cost about three times the price of K&T. [6] Knob and tube wiring persisted since it allowed owners to wire a building for electricity at lower cost.