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2. Multiway switching - Wikipedia

   en.wikipedia.org/wiki/Multiway_switching

   A "4-way" (intermediate) switch is a purpose built double pole, double throw (DPDT) switch, internally wired in manufacture to reverse the connections between the input and output and having only four external terminals. This switch has two pairs of "traveler" terminals that it connects either straight through, or crossed over (transposed, or ...

3. Railroad switch - Wikipedia

   en.wikipedia.org/wiki/Railroad_switch

   A three-way switch is used to split a railroad track into three divergent paths rather than the more usual two. There are two types of three-way switches. In a symmetrical three-way switch, the left and right branches diverge at the same place. In an asymmetrical three-way switch, the branches diverge in a staggered way using two interlaced ...

4. Three-way switch - Wikipedia

   en.wikipedia.org/?title=Three-way_switch&redirect=no

   On this Wikipedia the language links are at the top of the page across from the article title. Go to top.

5. Switch - Wikipedia

   en.wikipedia.org/wiki/Switch

   Two-way: Three-way: A simple break-before-make changeover switch: C (COM, Common) is connected either to L1 or to L2. SPCO SPTT, c.o. Single pole changeover or single pole, centre off or single pole, triple throw Similar to SPDT. Some suppliers use SPCO/SPTT for switches with a stable off position in the centre and SPDT for those without.

6. NEMA connector - Wikipedia

   en.wikipedia.org/wiki/NEMA_connector

   The 50 A (and 5-50) receptacles look like bigger versions of the 5-15 A. 6-15R and 6-20R receptacles are usually manufactured on the same assembly line as "Industrial" or "Commercial" grade 5-15R and 5-20R receptacles, with all 4 receptacles sharing the same "triple wipe" T contacts behind the varying faceplates.

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8. File:3 way switch.svg - Wikipedia

   en.wikipedia.org/wiki/File:3_way_switch.svg

   2006-08-11 12:23 Ysangkok 250×125× (2448 bytes) Schematic of three-way light switch. Captions. English. Add a one-line explanation of what this file represents.

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