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2. Junction box - Wikipedia

   en.wikipedia.org/wiki/Junction_box

   An electrical junction box (also known as a "jbox") is an enclosure housing electrical connections. [1] Junction boxes protect the electrical connections from the weather , as well as protecting people from accidental electric shocks .

3. MC4 connector - Wikipedia

   en.wikipedia.org/wiki/MC4_connector

   MC4 connectors are electrical connectors commonly used for connecting solar panels. The MC in MC4 stands for the manufacturer Multi-Contact (now Stäubli Electrical Connectors) and the 4 for the 4 mm diameter contact pin. MC4s allow strings of panels to be easily constructed by pushing the compatible connectors from adjacent panels together by ...

4. Electrical conduit - Wikipedia

   en.wikipedia.org/wiki/Electrical_conduit

   Box connectors join conduit to a junction box or other electrical box. A typical box connector is inserted into a knockout in a junction box, with the threaded end then being secured with a ring (called a lock nut ) from within the box, as a bolt would be secured by a nut.

5. Knob-and-tube wiring - Wikipedia

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

   Other ceramic pieces would typically be used as a junction point between the wiring system proper, and the more flexible cloth-clad wiring found in light fixtures or other permanent, hard-wired devices. 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 ...

6. Twist-on wire connector - Wikipedia

   en.wikipedia.org/wiki/Twist-on_wire_connector

   Twist-on wire connectors are a type of electrical connector used to fasten two or more low-voltage (or extra-low-voltage) electrical conductors. They are widely used in North America and several European countries in residential, commercial and industrial building power wiring, but have been banned in some other jurisdictions.

7. Utility box - Wikipedia

   en.wikipedia.org/wiki/Utility_box

   Utility box may refer to: A toolbox; Pattress, a box that houses electrical sockets, switches, or other fixtures, also known as an electrical box Junction box, a box that houses electrical connections; Electrical enclosure, a cabinet-sized box housing electrical equipment or connectors Pad-mounted transformer