National Electrical CodeThe National Electrical Code (NEC), or NFPA 70, is a regionally adoptable standard for the safe installation of electrical wiring and equipment in the United States. It is part of the National Fire Code series published by the National Fire Protection Association (NFPA), a private trade association. Despite the use of the term "national," it is not a federal law.
Electrical wiringElectrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, receptacles, outlets, and light fittings in a structure. Wiring is subject to safety standards for design and installation.
AmpereThe ampere (symbol: A), often shortened to amp, is the unit of electric current in the International System of Units (SI). One ampere is equal to 1 coulomb (C) moving past a point per second. It is named after French mathematician and physicist André-Marie Ampère (1775–1836), considered the father of electromagnetism along with Danish physicist Hans Christian Ørsted.
United StatesThe United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic consisting of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean.
Thermal insulationThermal insulation is the reduction of heat transfer (i.e., the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence. Thermal insulation can be achieved with specially engineered methods or processes, as well as with suitable object shapes and materials. Heat flow is an inevitable consequence of contact between objects of different temperature.
Joule heatingJoule heating (also known as resistive heating, resistance heating, or Ohmic heating) is the process by which the passage of an electric current through a conductor produces heat. Joule's first law (also just Joule's law), also known in countries of the former USSR as the Joule–Lenz law, states that the power of heating generated by an electrical conductor equals the product of its resistance and the square of the current.American wire gaugeAmerican Wire Gauge (AWG) is a logarithmicsteppedstandardizedwire gauge system used since 1857, predominantly in North America, for the diameters of round, solid, nonferrous, electrically conductingwire. Dimensions of the wires are given in ASTM standard B 258. The cross-sectional area of each gauge is an important factor for determining its current-carrying capacity. OriginThe AWG originated in the number of drawing operations used to produce a given gauge of wire.Electrical resistance and conductanceThe electrical resistance of an object is a measure of its opposition to the flow of electric current. Its reciprocal quantity is electrical conductance, measuring the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with mechanical friction. The SI unit of electrical resistance is the ohm (Ω), while electrical conductance is measured in siemens (S).
OvercurrentIn an electric power system, overcurrent or excess current is a situation where a larger than intended electric current exists through a conductor, leading to excessive generation of heat, and the risk of fire or damage to equipment. Possible causes for overcurrent include short circuits, excessive load, incorrect design, an arc fault, or a ground fault.OilOil is a liquid with varying degrees of viscosity depending on temperature. Oil is any nonpolar chemical substance that is composed primarily of hydrocarbons and is hydrophobic and lipophilic. Oils are usually flammable and surface active. Most oils are unsaturated lipids that are liquid at room temperature.
PortmanteauIn literary studies, a portmanteau, also known in linguistics and lexicography as a blend word, a lexical blend, or simply a blend, is a word formed by combining the meanings and parts of the sounds of two or more words. English examples include smog, coined by blending smoke and fog, and motel, blending motor (or motorist) and hotel.
Electrical wiringElectrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, receptacles, outlets, and light fittings in a structure. Wiring is subject to safety standards for design and installation.AmpereThe ampere (symbol: A), often shortened to amp, is the unit of electric current in the International System of Units (SI). One ampere is equal to 1 coulomb (C) moving past a point per second. It is named after French mathematician and physicist André-Marie Ampère (1775–1836), considered the father of electromagnetism along with Danish physicist Hans Christian Ørsted.United StatesThe United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic consisting of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean.Thermal insulationThermal insulation is the reduction of heat transfer (i.e., the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence. Thermal insulation can be achieved with specially engineered methods or processes, as well as with suitable object shapes and materials. Heat flow is an inevitable consequence of contact between objects of different temperature.Joule heatingJoule heating (also known as resistive heating, resistance heating, or Ohmic heating) is the process by which the passage of an electric current through a conductor produces heat. Joule's first law (also just Joule's law), also known in countries of the former USSR as the Joule–Lenz law, states that the power of heating generated by an electrical conductor equals the product of its resistance and the square of the current.American wire gaugeAmerican Wire Gauge (AWG) is a logarithmicsteppedstandardizedwire gauge system used since 1857, predominantly in North America, for the diameters of round, solid, nonferrous, electrically conductingwire. Dimensions of the wires are given in ASTM standard B 258. The cross-sectional area of each gauge is an important factor for determining its current-carrying capacity. OriginThe AWG originated in the number of drawing operations used to produce a given gauge of wire.Electrical resistance and conductanceThe electrical resistance of an object is a measure of its opposition to the flow of electric current. Its reciprocal quantity is electrical conductance, measuring the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with mechanical friction. The SI unit of electrical resistance is the ohm (Ω), while electrical conductance is measured in siemens (S).OvercurrentIn an electric power system, overcurrent or excess current is a situation where a larger than intended electric current exists through a conductor, leading to excessive generation of heat, and the risk of fire or damage to equipment. Possible causes for overcurrent include short circuits, excessive load, incorrect design, an arc fault, or a ground fault.OilOil is a liquid with varying degrees of viscosity depending on temperature. Oil is any nonpolar chemical substance that is composed primarily of hydrocarbons and is hydrophobic and lipophilic. Oils are usually flammable and surface active. Most oils are unsaturated lipids that are liquid at room temperature.PortmanteauIn literary studies, a portmanteau, also known in linguistics and lexicography as a blend word, a lexical blend, or simply a blend, is a word formed by combining the meanings and parts of the sounds of two or more words. English examples include smog, coined by blending smoke and fog, and motel, blending motor (or motorist) and hotel.*As an Amazon Associate I earn from qualifying purchases.