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  2. Knob-and-tube wiring - Wikipedia

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

    Ceramic bushings protected each wire entering a metal device box, when such an enclosure was used. Loom, a woven flexible insulating sleeve, was slipped over insulated wire to provide additional protection whenever a wire passed over or under another wire, when a wire entered a metal device enclosure, and in other situations prescribed by code.

  3. Mineral-insulated copper-clad cable - Wikipedia

    en.wikipedia.org/wiki/Mineral-insulated_copper...

    PVC-sheathed MICC cable. Conductor cross section area is 1.5 mm 2; overall diameter is 7.2 mm. Mineral-insulated cables at a panel board. Mineral-insulated copper-clad cable is a variety of electrical cable made from copper conductors inside a copper sheath, insulated by inorganic magnesium oxide powder.

  4. Heat-shrink tubing - Wikipedia

    en.wikipedia.org/wiki/Heat-shrink_tubing

    Animation of heat-shrink tubing, before and after shrinking. Heat-shrink tubing (or, commonly, heat shrink or heatshrink) is a shrinkable plastic tube used to insulate wires, providing abrasion resistance and environmental protection for stranded and solid wire conductors, connections, joints and terminals in electrical wiring.

  5. 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.

  6. Aluminum building wiring - Wikipedia

    en.wikipedia.org/wiki/Aluminum_building_wiring

    The use of larger gauge stranded aluminum wire (larger than #8 AWG) is fairly common in much of North America for modern residential construction. Aluminum wire is used in residential applications for lower voltage service feeders from the utility to the building. This is installed with materials and methods as specified by the local electrical ...

  7. Electrical wiring - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring

    A somewhat similar system called "concentric wiring" was introduced in the United States around 1905. In this system, an insulated electrical wire was wrapped with copper tape which was then soldered, forming the grounded (return) conductor of the wiring system. The bare metal sheath, at earth potential, was considered safe to touch.

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