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Tamper-resistant GFCI duplex receptacle type 5-20RA, which can take 5-15 and 5-20 grounding plugs and 1-15 non-grounding plugs. These versions of the 5-15R or 5-20R receptacle are residual-current devices, and have "Test" and "Reset" buttons (and sometimes an indicator light which may be normally on or normally off per the vendor's design). In ...
The Swiss standard, also used in Liechtenstein and Rwanda [54] (and in other countries alongside other standards) is SN 441011 (until 2019 SN SEV 1011) Plugs and socket-outlets for household and similar purposes. [55] The standard defines a hierarchical system of plugs and sockets with two, three and five pins, and 10 A or 16 A ratings.
Harvey Hubbell had patented the parallel blade plug in 1913, and patented a polarized version in 1916. He also patented the T-slot single outlet in 1915, and a duplex T-slot outlet in 1916 both meant to take his older 1904 tandem and newer parallel plug design. (Single: U.S. patent 1,146,938; Duplex: U.S. patent 1,210,176). Prior to the 1930s ...
Plug load is the energy used by products that are powered by means of an ordinary AC plug (e.g., 100, 115, or 230 V). [1] This term generally excludes building energy that is attributed to major end uses ( HVAC , lighting , water heating , etc.) [ 1 ]
The advantage is that only three wires are required to serve these loads, instead of four. If one kitchen appliance overloads the circuit, the other side of the duplex receptacle will be shut off as well. This is called a multiwire branch circuit. Common trip is required when the connected load uses more than one phase simultaneously.
An outlet is defined by the NEC as "a point in the wiring system at which current is taken to utilization equipment". [1] This definition includes receptacles, lighting, motors, etc. Ordinary switches control but do not consume electricity, and therefore are not defined as outlets in this sense.
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