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2. MC4 connector - Wikipedia

   en.wikipedia.org/wiki/MC4_connector

   The MC3 connectors were discontinued in 2016. MC4 name stood for Multi-Contact and its size 4mm PV connectors, introduced by Multi-Contact in 2004. While small solar panels used for battery charging and similar tasks may not require special connectors, larger systems normally connect the panels together in series to form strings. In the past ...

3. Electrical conduit - Wikipedia

   en.wikipedia.org/wiki/Electrical_conduit

   Galvanized rigid conduit (GRC) is galvanized steel tubing, with a tubing wall that is thick enough to allow it to be threaded. Its common applications are in commercial and industrial construction. [1] It is designed to protect wire and connectors. Intermediate metal conduit (IMC) is a steel tubing heavier than EMT but lighter than RMC. It may ...

4. Junction box - Wikipedia

   en.wikipedia.org/wiki/Junction_box

   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].

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6. Electrical wiring in North America - Wikipedia

   en.wikipedia.org/wiki/Electrical_wiring_in_North...

   Most wiring is put in non-flexible conduit, usually EMT because of its cost and durability. Rigid may be required for certain areas and additionally, vapor-lock fittings may be required in areas where a fire or explosion hazard is present (such as gas stations, chemical factories, grain silos, etc.) PVC can be used where wire is run underground ...

7. National Electrical Code - Wikipedia

   en.wikipedia.org/wiki/National_Electrical_Code

   The NEC also specifies adjustments of the ampacity for wires in circular raceways exposed to sunlight on rooftops, due to the heating effects of solar radiation. Electrical Construction and Maintenance Magazine, Conductors for General Use, Chapter 3 Articles in NEC, starting with Article 342 This section is expected to be modified to include ...

8. IEC metric screw sized connectors - Wikipedia

   en.wikipedia.org/wiki/IEC_metric_screw_sized...

   The larger connector sizes are the most varied, with designated connectors ranging from analog and digital signals to AC and DC power. [ 4 ] Each "coding" has a different keyway that prevents incorrect connection between incompatibly keyed connectors.

9. U.S. Military connector specifications - Wikipedia

   en.wikipedia.org/wiki/U.S._Military_connector...

   A MIL-DTL-38999 circular connector plated with a nickel–teflon composite. Left: plug (male) type connector; Right: receptacle (female) type connector) Electrical or fiber-optic connectors used by U.S. Department of Defense were originally developed in the 1930s for severe aeronautical and tactical service applications, and the Type "AN" series set the standard for modern military circular ...