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2. Knob-and-tube wiring - Wikipedia

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

   When a generic power outlet was desired, the wiring could run directly into the junction box through a tube of protective loom and a ceramic bushing. Wiring devices such as light switches, receptacle outlets, and lamp sockets were either surface-mounted, suspended, or flush-mounted within walls and ceilings.

3. Electrical wiring - Wikipedia

   en.wikipedia.org/wiki/Electrical_wiring

   Electrical wiring is an electrical installation of cabling and associated ... switches, receptacles, splice connectors ... but could be easily run on wall surfaces. ...

4. Home wiring - Wikipedia

   en.wikipedia.org/wiki/Home_wiring

   Once you have installed the electrical cabling you need to install the data bus cable from the electrical switchboard to every location you want to have a light switch or control panel installed (control panel is like the code pad on a security system or touch screen that gives you access to various control functions).

5. Aluminum building wiring - Wikipedia

   en.wikipedia.org/wiki/Aluminum_building_wiring

   Some of these devices used larger undercut screw terminals to more securely hold the wire. Special CO/ALR-rated wall outlet and wall switch. Unfortunately, CU/AL switches and receptacles failed to work well enough with aluminum wire, and a new specification called CO/ALR (meaning copper-aluminum, revised) was created.

6. AC power plugs and sockets - Wikipedia

   en.wikipedia.org/wiki/AC_power_plugs_and_sockets

   Even though the two electric lines (and respective tariffs) were gradually unified beginning in the 1960s (the official, but purely theoretical, date was the summer of 1974) [43] many houses had dual wiring and two electricity meters for years thereafter; in some zones of Lazio the 127 V network was provided for lighting until 1999.

7. Light switch - Wikipedia

   en.wikipedia.org/wiki/Light_switch

   The toggle light switch was invented in 1916 by William J. Newton. [2] As a component of an electrical wiring or home wiring system, the installation of light switches is regulated by some authority concerned with safety and standards. In different countries the standard dimensions of the wall mounting hardware (boxes, plates, etc.) may differ.