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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).
In stage lighting for film and theater, the 5-15R connector is sometimes informally known as PBG (Parallel Blade with Ground), U-ground, or Edison. [21] In the motion picture and TV production industries, lighting technicians use extension cords with this connector, usually with 10-12 AWG wire, [ 22 ] to deliver power to lights rated at 2,000 ...
Many sockets have a third receptacle or pin for a safety connection to earth ground. The plug is a male connector, usually with protruding pins that match the receptacles (female contacts) in a socket. Some plugs also have a female contact, used only for the earth ground connection. Typically no energy is supplied to any exposed pins or ...
Special wiring rules apply to wet or corrosive locations, [13] and to locations which present an explosion hazard. [14] Wiring materials for use in the United States must generally be made and tested to product standards set by NEMA and Underwriters Laboratories (UL) and must bear approval marks such as those set by UL.
SANS 164-3 defines a 6 A plug and socket based on the BS 546 5 A. The South African Wiring Code now defines the plug and socket system defined in SANS 164-2 (IEC 60906-1) as the preferred standard, and it is expected that SANS 164-1 and SANS 164-3 devices will be phased out by around 2035. [96]
The neutral conductor of a 3-phase, 4-wire system and the middle conductor of a 2- phase, 3-wire system must have at least 2 separate and distinct earth connections with a minimum of 2 different earth electrodes to have a satisfactory earth resistance; The earth electrodes must be interconnected to reduce earth resistance
A ground loop is caused by the interconnection of electrical devices that results in multiple paths to ground, thereby forming closed conductive loops through the ground connections. A common example is two electrical devices each connected to a mains power outlet by a three-conductor cable and plug containing a protective ground conductor for ...
The earth connection is achieved with a three-conductor mains cable, typically ending with three-prong AC connector which plugs into a corresponding AC outlet. Plugs are designed such that the connection to the protective earth conductor should be the first connection when plugged in. It should also be the last to be broken when the plug is ...
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