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2. Bonding jumper - Wikipedia

   en.wikipedia.org/wiki/Bonding_jumper

   [2] Some codes require a bonding jumper to be pulled into non-metallic conduit or in electrical metallic tubing that may be exposed to corrosion or mechanical damage. In North American electrical codes, an important bonding jumper is found in main electrical panels, where the system neutral conductor is connected to earth ground. This must be ...

3. Air-line fitting - Wikipedia

   en.wikipedia.org/wiki/Air-line_fitting

   One side is connected to a flexible supply hose; the other may be attached to a manifold, valve, tool, or another hose. A female coupler is used on the supply side, and a male nipple is used on the receiving side. Fitting profiles have identifiable geometry on the male end, but care must be taken to use a compatible coupler.

4. Copper tubing - Wikipedia

   en.wikipedia.org/wiki/Copper_tubing

   A similar bonding jumper wire is used between the inlet and outlet of gas meters, but here the purpose is to avoid having a substantial voltage difference between the building’s grounding electrode(s) and buried natural gas lines appear across the gas meter during the brief interval when a line to ground fault is conducting before the ...

5. 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.

6. 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.

7. Electrical bonding - Wikipedia

   en.wikipedia.org/wiki/Electrical_bonding

   Equipotential bonding involves electrically connecting metalwork so that it is at the same voltage everywhere. Exact rules for electrical installations vary by country, locality, or supplying power company. [2] Equipotential bonding is done from where the distribution wiring enters the building to incoming water and gas services.