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2. Three-prong adaptor - Wikipedia

   en.wikipedia.org/wiki/Three-prong_adaptor

   The ground tab is designed to be attached to the outlet faceplate screw, which is supposed to be connected to the building electrical ground. A cheater plug, AC ground lifter or three-prong/two-prong adapter is an adapter that allows a NEMA 5-15P grounding-type plug (three prongs) to connect to a NEMA 1-15R non-grounding receptacle (two slots).

3. NEMA connector - Wikipedia

   en.wikipedia.org/wiki/NEMA_connector

   NEMA 1-15P (two-pole, no ground) and NEMA 5-15P (two-pole with ground pin) plugs are used on common domestic electrical equipment, and NEMA 5-15R is the standard 15-ampere electric receptacle (outlet) found in the United States, and under relevant national standards, in Canada (CSA C22.2 No. 42 [1]), Mexico (NMX-J-163-ANCE) and Japan (JIS C 8303).

4. 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 ...

5. Earthing system - Wikipedia

   en.wikipedia.org/wiki/Earthing_system

   The US National Electrical Code permitted the use of the supply neutral wire as the equipment enclosure connection to ground from 1947 to 1996 for ranges (including separate cooktops and ovens) and from 1953 to 1996 for clothes dryers, whether plug-in or permanently fixed, provided that the circuit originated in the main service panel. Normal ...

6. Electrical conduit - Wikipedia

   en.wikipedia.org/wiki/Electrical_conduit

   Sometimes the fittings are considered sufficiently conductive to bond (electrically unite) the metal conduit to a metal junction box (thus sharing the box's ground connection); other times, grounding bushings are used which have bonding jumpers from the bushing to a grounding screw on the box.

7. Electrical connector - Wikipedia

   en.wikipedia.org/wiki/Electrical_connector

   The movable (less fixed) connector is classified as a plug (denoted P), [37] designed to attach to a wire, cable or removable electrical assembly. [38] This convention is currently defined in ASME Y14.44-2008, which supersedes IEEE 200-1975 , which in turn derives from the long-withdrawn MIL-STD-16 (from the 1950s), highlighting the heritage of ...

8. 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 ...

9. AC power plugs and sockets - Wikipedia

   en.wikipedia.org/wiki/AC_power_plugs_and_sockets

   Grounded vs ungrounded NEMA plugs. The NEMA 5-15 plug has two flat parallel blades like NEMA 1-15, and a ground (earth) pin. [46] It is rated 15 A at 125 volts. The ground pin is longer than the line and neutral blades, such that an inserted plug connects to ground before power. The ground hole is officially D-shaped, although some round holes ...