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Technology and the built world

61,984 articles

Electric starter (motorcycle)

An electric starter on a motorcycle is a battery-powered motor that cranks the engine when the rider presses a button, replacing the kickstarter; it first appeared on a 1914 Hendee.

Electric stove

An electric stove is a kitchen appliance that cooks using electrical resistance or induction rather than burning fuel, typically combining a cooktop with an electric oven in one unit.

Electric toothbrush

An electric toothbrush is a battery-powered brush with a motor-driven head that removes plaque better than a manual brush, reducing plaque by about 21% after 3 months.

Electric trolley-assist

Electric trolley-assist is a mining haulage technology in which diesel-electric haul trucks connect through pantographs to overhead lines on pit ramps, roughly doubling uphill speed while cutting diesel use.

Electric vehicle

An electric vehicle (EV) is a road vehicle powered by a battery and electric motor, using about 70% less energy per kilometer than a similar gasoline car.

Electric vehicle battery

An electric vehicle battery, also known as a traction battery or EV battery, is a rechargeable lithium-ion pack that supplies power to electric cars, hybrids, and plug-in hybrids.

Electric water boiler

An electric water boiler is an electrically powered kitchen appliance for heating drinking water, spanning electric kettles, countertop boilers and urns, instant hot-water dispensers, and plumbed-in boiling-water taps.

Electric water heater

An electric water heater is an appliance that uses electricity to heat potable water, in storage, tankless, and heat pump forms, with heat pump models roughly three times more efficient.

Electric Wiring

Electric wiring is the organized placement of conductors, cables, and related equipment to build circuits in buildings, machines, and electronics, governed in the US by the National Electrical Code.

Electric-steam locomotive

An electric-steam locomotive either uses an on-board steam engine to generate electricity for traction motors, or draws external electricity to heat its boiler water, as in Swiss wartime conversions.

Electrica

Electrica, formally Societatea Energetica Electrica S.A., is a Romanian energy company for electricity distribution and supply, listed in Bucharest and London since 2014 and serving about 4 million customers.

Electrical balance duplexer

An electrical balance duplexer (EBD) is a four-port RF device that lets a transmitter and receiver share one antenna by canceling the transmit signal at the receiver.

Electrical ballast

An electrical ballast, also called a lamp ballast, is a device that starts gas-discharge lamps and limits their current, ranging from simple magnetic coils to electronic circuits.

Electrical cable

An electrical cable, also called insulated cable, is an assembly of insulated conductors that carries electric power or signals, from power lines to coaxial types.

Electrical conduit

Electrical conduit, also called cable duct, is a raceway of tubing, fittings, and boxes that encloses and protects electrical wiring along a run, unlike open cable tray.

Electrical connector

An electrical connector, also called a wire connector, joins electrical circuits with a reliable yet separable connection, letting cables or circuit boards attach without soldering.

Electrical discharge machining

Electrical discharge machining (EDM), also called spark machining or spark erosion, is a machining process that removes conductive material, regardless of hardness, by controlled sparks in a dielectric fluid.

Electrical engineering

Electrical engineering is a professional engineering discipline covering the study and application of electricity, electronics, and electromagnetism, spanning subfields from power and telecommunications to computer engineering and robotics.

Electrical Equipment and Supplies

Electrical Equipment and Supplies (MeSH D055615, tree E07.305) is a National Library of Medicine subject heading for apparatus and instruments that generate or operate with electricity and their components, introduced in 2009, used to index biomedical literature on powered medical and electronic equipment.

Electrical equipment in hazardous areas

Electrical equipment in hazardous areas, or HAZLOC, is equipment designed and certified so it cannot ignite explosive atmospheres, which are classified into zones by likelihood.

Electrical grid

An electrical grid, also called an electricity grid or power grid, is the network of power plants, transmission lines, transformers, and distribution lines that carries electricity to consumers.

Electrical network

An electrical network, also called an electric circuit, is a system of elements and nodes in which every element terminal connects to a node, analyzed through Kirchhoff's rules.

Electrical telegraph

The electrical telegraph, also called the electromagnetic or magnetic telegraph, sends written messages as coded pulses over wires; Cooke and Wheatstone patented the first practical system in 1837.

Electrical treeing

Electrical treeing is a pre-breakdown degradation process in which branching channels grow through solid electrical insulation, the primary failure mode of polymeric high-voltage cable insulation.

Electrical wiring

Electrical wiring, also known as building wiring, carries electricity from the supply to lights, appliances, and equipment in a building, governed by codes such as the US National Electrical Code.

Electrical wiring in the United Kingdom

Electrical wiring in the United Kingdom (UK electrical wiring) is governed by BS 7671, the IET Wiring Regulations, and is known for fused three-pin plugs and ring final circuits.

Electrical wiring interconnection system

An electrical wiring interconnection system (EWIS) is the system of wires, connectors, and protective devices installed in an airplane to transmit electrical energy and signals.

Electrically conductive adhesive (photovoltaics)

An electrically conductive adhesive (ECA) in photovoltaics is a polymer filled with conductive particles that bonds solar cells to copper ribbon while carrying current across the joint.

Electrician

An electrician is a tradesperson who installs, maintains, and repairs electrical wiring, equipment, and fixtures in homes, businesses, and factories, working to building and safety codes, typically after a 4- or 5-year apprenticeship.

Électricité de France

Électricité de France (EDF) is a French state-owned electricity utility created in 1946, one of the world's largest producers of low-carbon power, serving 41.1 million customer sites.