Equal to 1000 Watt-hours. Admittance (Ω Ohms) — Admittance is essentially the opposite of resistance (and is given by 1 divided by the resistance). Insulators protect equipment and life from electric shock. Service Lateral – The underground service conductors between the street main – including risers – and the first point of connection to the service-entrance conductors in a terminal box (also known as a junction box), meter, or other enclosure. If a current completes one cycle per second, then the frequency is 1 Hz; 60 cycles per second equals 60 Hz. Resistor — A device usually made of wire or carbon which presents a resistance to current flow. Test Equipment 101: The Basics of Electrical Testing, Circuit Breaker Control Schematic Explained, Protective Relay Protection Element Tests, Capacitive Reactance - How to Solve Series and Parallel Capacitors, Infrared Thermography for Electrical Distribution Systems, Electrical Drawings and Schematics Overview, Ground Fault Protection Systems: Performance Testing Basics, Protective Relay Testing and Maintenance Overview, Transformer Winding Resistance Testing Explained, Zone Selective Interlocking (ZSI) Basic Principles, 4 Critical Tests for Evaluating HV Circuit Breaker Performance, Surge Arresters: Selection, Application and Testing Overview, Electrical Shock and Arc Flash PPE Overview, Network Protector Basics: Applications, Operation, and Testing, Power Cable Testing and Diagnostics Overview. If the rate of change of current in a circuit is one ampere per second and the resulting electromotive force is one volt, then the inductance of the circuit is one henry. Kilowatt-hour Meter — A device used to measure electrical energy use. Watt (W) — A unit of electrical power. Ammeter — An instrument for measuring the flow of electrical current in amperes. Read on to discover more about basic electrical theory. Nominal Voltage: What is it? This Instructable will hopefully demystify the basics of electronics so that … Basic Electrical Concepts & Terms Basic electrical concepts and terms - current, voltage, resistance, power, charge, efficiency. Dielectric constant — A quantity measuring the ability of a substance to store electrical energy in an electric field. To restore service, the circuit breaker must be reset (closed) after correcting the cause of the overload or failure. Volt- the unit of electromotive force, the measure of electrical pressure, is abbreviated v or V, and voltage is represented by I. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits. Kilowatt-hour Meter — A device used to measure electrical energy use. It is analogous to a closed valve in a water system. It has a negative charge of electricity. Copper expands during an arc flash event at a factor of 67000 times within a few milliseconds. Current (I) — The flow of an electric charge through a conductor. For example, if a 100W light bulb is used for 4 hours, 0.4kWhs of energy will be used (100W x 1kW / 1000 Watts x 4 hours). Ohm — (Ω) A unit of measure of resistance. Current is the organized flow of electric charges through a conductor, and voltage is the driving force that pushes electric charges to create current. Feeder Pillar – A feeder pillar (also known as a power box or distribution pillar) is a cabinet used to house electrical equipment. After it flows through the household system, it is fed back to the utility on the neutral wire, completing the electrical circuit. Kilowatt-hour (kWh) — The product of power in kW and time in hours. Electron theory — The theory which explains the nature of electricity and the exchange of "free" electrons between atoms of a conductor. Replacing the earlier term of cycle per second (cps). Each load connected in a separate path receives the full circuit voltage, and the total circuit current is equal to the sum of the individual branch currents. Inverter — An apparatus that converts direct current into alternating current. Ferroresonance — (nonlinear resonance) a type of resonance in electric circuits which occurs when a circuit containing a nonlinear inductance is fed from a source that has series capacitance, and the circuit is subjected to a disturbance such as opening of a switch. Capacitor — A device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator. Current (I) — The flow of an electric charge through a conductor. This is the difference of potential (voltage) between different points in an electrical circuit. Ground or Earth — The reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth. Basics of electricity- Potential - Ability to do work Voltage - Potential difference. The source of mechanical energy may vary widely from a hand crank to an internal combustion engine. Measured in VARS. Inductor — A coil of wire wrapped around an iron core. Measured in henry (H). Capacitance — The ability of a body to store an electrical charge. Website designed with screwdrivers, levels, hammers, and keyboards, © Copyright Electrician Apprentice HQ 2020, Electrical Terms and Definitions You Should Know (Electrician Basics), Electrical Terms for Mathematical Calculations, Random Electrical Terms That You Should Be Familiar With, Best International Travel Surge Protector, Best Surge Protector for Garage Door Openers, Best Surge Protector for Air Conditioners, What is an Electrician’s Apprentice (And How to Become an Electrical Apprentice), Electrician Apprentice Wages and Salary (2020 Pay Scale). Switch — A switch is a device for making, breaking, or changing the connections in an electric current. Series Circuit — A circuit in which there is only one path for electricity to flow. Neutral Conductor – The conductor connected to the neutral point of a system that is intended to carry current under normal conditions. One volt is equal to the difference of potential that would drive one ampere of current against one-ohm resistance. Ampere (A) — A unit of measure for the intensity of an electric current flowing in a circuit. Electric charge refers to a fundamental property of matter that even physicists don’t totally understand. Electricity is the flow of electrical energy through some conductive material.Electronics refers to using changing electrical properties to convey information. Volt-Ampere (VA) — A unit of measure of apparent power. This article will help you with the definitions and explanations of terminology used and will help you understand exactly what your electrician is talking about. Alternating Current (AC) — An electric current that reverses its direction many times a second at regular intervals. A third service cable, the neutral, connects to the neutral bus bar inside the panel. Reluctance — The resistance that a magnetic circuit offers to lines of force in a magnetic field. Armature — The movable part of a generator or motor. If you are thinking about becoming an electrician, there are a few terms you will be required to know.You can get a head start on your electrical training by reviewing some of the most important ones here. Generators provide nearly all of the power for electric power grids. The current through a conductor between two points is directly proportional to the voltage across the two points.I = V / R or V = IR or R = V/IWhere I is the current through the conductor in units of amperes, V is the voltage measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. Ground Fault – A ground fault is an unintentional, electrically conductive connection between an ungrounded conductor of an electrical circuit and the normally non–current-carrying conductors, metallic enclosures, metallic raceways, metallic equipment, or earth. Diodes allow current to flow when the anode is positive in relation to the cathode. DC (Direct Current) — DC stands for Direct Current. This article seeks to clarify some elementary electrical terms and concepts that are sometimes confused. One ohm is equivalent to the resistance in a circuit transmitting a current of one ampere when subjected to a potential difference of one volt. Electrical resistance can be compared to the friction experienced by water when flowing through a pipe. The electrons always flow from a negative point to a positive (or less negative) point, because electrons have a negative charge. The switching action happens extremely fast. Typically only two bends. Electric current the electrical term Electric current is one of the basic electrical terms described as when electrons flow from one place to another, they make a current. Electricity vocabulary, Electricity word list - a free resource used in over 40,000 schools to enhance vocabulary mastery & written/verbal skills with … Volt (V) — A unit measure of voltage. Watt-hour (Wh) — A unit of electrical energy equivalent to a power consumption of one watt for one hour. One watt is equivalent to one joule per second, corresponding to the power in an electric circuit in which the potential difference is one volt and the current one ampere. Load banks are normally used for these tests as part of the commissioning process for electrical power systems. are essential to the proper application and understanding. One cannot … Multiplier – Used to calculate the distance between bends using “multiplier X offset”, Arc Flash – An arc flash is light and heat and is a type of electrical explosion or discharge that results from a low-impedance connection through air to ground or another voltage phase in an electrical system. One farad is equal to one coulomb per volt. What is a Milliampere Equal To? The power manifested in tangible form such as electromagnetic radiation, acoustic waves, or mechanical phenomena. Basic electrical definitions & terminology This article will contain most of the electrical terms definitions which . Ohmmeter — An instrument for measuring the resistance in ohms of an electrical circuit. Electron - A basic subatomic particle found in all atoms, electrons carry electricity by flowing from one atom to the next in a conductive material. Alternating Current (AC) Ammeter Ampacity Ampere-Hour (Ah) Ampere (A) Apparent Power Armature Capacitance Capacitor Circuit Circuit Breaker Conductor Corona Current (I) Cycle … So what is electricity and where does it come from? Voltage — An electromotive force or "pressure" that causes electrons to flow and can be compared to water pressure which causes water to flow in a pipe. Knockout Set – Known more specifically as an electrical knockout set or knockout punch. Ground Fault – An unintentional, electrically conductive connection between an ungrounded conductor of an electrical circuit and the normally non–current-carrying conductors, metallic enclosures, metallic raceways, metallic equipment, or earth. Measured in henry (H). The images shown over at Electrical4U can make it a lot easier to understand. Parallel Circuit — A circuit in which there are multiple paths for electricity to flow. Transistor — A semiconductor device with three connections, capable of amplification in addition to rectification. Watt-hour (Wh) — A unit of electrical energy equivalent to power consumption of one watt for one hour. Power — The rate at which electrical energy is transferred by an electric circuit. Arc Blast – The intense heat from an arc causes sudden expansion of air resulting in a blast. Last updated on November 24th, 2020 at 05:20 am. Direct Current (DC) — An electric current that flows in only one direction. Voltage, measured in volts (V), is the measure of potential energy per unit of charge. One watt is equivalent to one joule per second, corresponding to the power in an electric circuit in which the potential difference is one volt and the current one ampere. Farad — A unit of measure for capacitance. Electrical energy is sold in units of kWh. Hand Bender – A tool used for bending EMT (electrical metal tubing), IMC (intermediate metal conduit), and RMC (rigid metal conduit). Electrical energy is sold in units of kWh. Each load connected in a separate path receives the full circuit voltage, and the total circuit current is equal to the sum of the individual branch currents. Three Bend Saddle – Three bends in a piece of conduit – one in the center and two side bends that clear an obstacle by “saddling” it. The power manifested in a tangible forms such as electromagnetic radiation, acoustic waves, or mechanical phenomena. Exists in an AC circuit when the current and voltage are not in phase. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits. We include basic formulas relating amps, volts, resistance, watts, and we explain what these electrical terms mean in practical applications such as for building or appliance electrical power, electrical wiring, and basic … Generator –  A device that converts mechanical energy to electrical energy for use in an external circuit. The inductance is directly proportional to the number of turns in the coil. Electron — A tiny particle which rotates around the nucleus of an atom. To restore service, the circuit breaker must be reset (closed) after correcting the cause of the overload or failure. Voltmeters have a high internal resistance are connected across (parallel to) the points where voltage is to be measured. Shrink – The amount the conduit will “shrink” because of bending around an obstruction – picture an inchworm and how it shrinks when it moves. In simple terms, electricity is supplied to the house on the hot wires. DC (Direct Current) — DC stands for Direct Current. Ohm — (Ω) A unit of measure of resistance. For example, a battery which provides 5 amperes for 20 hours is said to deliver 100 ampere - hours. Basic Electrical Terms and Definitions Understanding electricity requires knowledge of these basic electrical terms. For example, if a 100W light bulb is used for 4 hours, 0.4 kWhs of energy will be used (100W x 1kW / 1000 Watts x 4 hours). Conductor — Any material where electric current can flow freely. Learn how to use a digital multimeter. Equal to 1000 Watt-hours. All of the current in the circuit must flow through all of the loads. Series-Parallel Circuit — A circuit in which some of the circuit components are connected in series and others are connected in parallel. Ampacity — The maximum amount of electric current a conductor or device can carry before sustaining immediate or progressive deterioration. The third piece of the puzzle is called power (abbreviated P in equations). Insulator — Any material where electric current does not flow freely. Last updated on August 19th, 2020 at 10:35 pm. A Glossary of Electrical Terms Become an Electrician Electricians are skilled tradespeople working in a variety of different residential and industrial settings. Basic Electrical Measurement Units . In this review of terms from the Lake Technical College Apprentice program we review open and short circuits – Make and Break – Normally Open and Closed – Switches – Loads – Power Supplies and Conductors and More. Measured in volts. As you progress in the electrical trade you’ll hear a bunch of electrical terms being tossed around like their common knowledge. Electrical Engineering Tour — This website is a complete package of electrical engineering tours, wherein you will find tutorials and everything you want to know about the branch. If the rate of change of current in a circuit is one ampere per second and the resulting electromotive force is one volt, then the inductance of the circuit is one henry. Lenz Law – Lenz law is a little bit more on the technical side, but one of the electrical engineers you work with might bring it up (they like to flash their fancy words). There are both half wave rectifiers and full wave rectifiers. Rectifier — An electrical device that converts an alternating current into a direct one by allowing a current to flow through it in one direction only. Measured in ohms. In a direct current (DC) circuit, or in an alternating current (AC) circuit whose impedance is a pure resistance, the voltage and current are in phase. 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