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Moving heads connected to a plug-in box (center). In stage lighting, a plug-in box, plug box [1] or drop box [2] is a device, similar to a power strip, to distribute power to multiple lighting instruments, consisting of an inlet (either detachable or hard-wired), and multiple female outlet connectors or pigtails.
Leviton Manufacturing Company, Inc. is an American manufacturer of electrical wiring equipment in North America. The company produces electrical outlets including GFCI and USB charging devices , network infrastructure, lighting control systems , load centers and circuit breakers , EV charging stations, and utility submetering .
Ungrounded (left) and grounded (right) power plugs Common North American 125-volt receptacles. All accept a 1-15P plug; the two on the left also accept grounded 5-15P plugs; the second from the left also accepts 5-20P plugs. The NEMA 5-15R device on the far left is most common; the two rightmost designs are typically seen in older buildings.
In one patent, U.S. patent 774,250 a plug was used with a socket which screwed into a lampholder (like the early lampholder plugs). In the other patent U.S. patent 776,326 the same type of plug was used with various three-way adaptors that could be connected to lampholders or "a receptacle of any ordinary type". Figures 2 and 4 of this patent ...
The term plug is in general and technical use in all forms of English, common alternatives being power plug, [1] electric plug, [2] and (in the UK) plug top. [3] The normal technical term (in both British and International English) for an AC power socket is socket-outlet , [ 4 ] but in non-technical common use a number of other terms are used.
The first types of small modular telephone connectors were created by AT&T in the mid-1960s for the plug-in handset and line cords of the Trimline telephone. [1] Driven by demand for multiple sets in residences with various lengths of cords, the Bell System introduced customer-connectable part kits and telephones, sold through PhoneCenter stores in the early 1970s. [2]