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  2. Cross-linked polyethylene - Wikipedia

    en.wikipedia.org/wiki/Cross-linked_polyethylene

    A cross-linked polyethylene (PEX) pipe. Cross-linked polyethylene, commonly abbreviated PEX, XPE or XLPE, is a form of polyethylene with cross-links.It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, insulation for high tension (high voltage) electrical cables, and baby play mats.

  3. Underground power line - Wikipedia

    en.wikipedia.org/wiki/Underground_power_line

    However, depending on the depth of the underground cable; greater EMF may be experienced on the surface. [4] The electric current in the cable conductor produces a magnetic field, but the closer grouping of underground power cables reduces the resultant external magnetic field, and further magnetic shielding may be provided.

  4. Earthing system - Wikipedia

    en.wikipedia.org/wiki/Earthing_system

    Grounding connectors. Connectors for earthing installation are a means of communication between the various components of the earthing and lightning protection installations (earthing rods, earthing conductors, current leads, busbars, etc.). For high voltage installations, exothermic welding is used for underground connections.

  5. Pothead - Wikipedia

    en.wikipedia.org/wiki/Pothead

    A pothead is a type of insulated electrical terminal used for transitioning between overhead line and underground high-voltage cable or for connecting overhead wiring to equipment like transformers. [1] Its name comes from the process of potting or encapsulation of the conductors inside the terminal's insulating bushing.

  6. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    Flare connectors are typically brass or plastic, but stainless steel or other materials may be used. Although flare connections are labor-intensive, they are durable and reliable. Considered more secure against leaks and sudden failure, they are used in hydraulic brake systems and in other high-pressure, high-reliability applications.

  7. Through-the-earth mine communications - Wikipedia

    en.wikipedia.org/wiki/Through-the-earth_mine...

    Sybet developed an underground communication network system based on a large number of autonomous, portable transceiver nodes (BatNode) which operate in mesh architecture, forwarding voice calls over long distance with no radio connection between the end stations, as long as the BatNodes can see their neighbours. [22]

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