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</html>";s:4:"text";s:28450:"Volt-Ampere (VA) — A unit of measure of apparent power. Measured in ohms. A Glossary of Electrical Terms Become an Electrician Electricians are skilled tradespeople working in a variety of different residential and industrial settings. Dielectric strength — The maximum electric field that a pure material can withstand under ideal conditions without breaking down (i.e., without experiencing failure of its insulating properties). 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. Reactive Power — The portion of electricity that establishes and sustains the electric and magnetic fields of AC equipment. Knockout Set – Known more specifically as an electrical knockout set or knockout punch. Measured in amperes. Hertz — A unit of measure for frequency. 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. Measured in farads as the ratio of the electric charge of the object (Q, measured in coulombs) to the voltage across the object (V, measured in volts). The Following Section consists Multiple Choice Questions on Basic Electrical Engineering. The terms you are required to know for the Electricity Merit Badge are: Volt, ampere (amp), watt, ohm, resistance, potential difference, rectifier, rheostat, conductor, ground, circuit, and short circuit. In its simplest terms, electricity is the movement of charge, which is considered by convention … φ 1 is the electric potential at point #1 in volts (V). Service — The conductors and equipment used to deliver energy from the electrical supply system to the system being served. An electric current can be compared to the flow of water in a pipe. One ampere is equal to a current flow of one coulomb per second. Waveform — A graphical representation ofelectrical cycles which shows the amount of variation in amplitude over some period of time. 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 … Let’s start with three very basic concepts of electricity: namely, electric charge, electric current, and electric circuit. Replacing the earlier term of cycle per second (cps). Vars may be considered as either the imaginary part of apparent power, or the power flowing into a reactive load, where voltage and current are specified in volts and amperes. Apparent power is the product of the rms voltage and the rms current. Impedance (Z) – The effective resistance of an electric circuit or component to alternating current (AC), rising from the combined effects of ohmic resistance and reactance. Reactive Power — Reactive power is the portion of electricity that establishes and sustains the electric and magnetic fields of AC equipment. Fundamentals. Replacing the earlier term of cycle per second (cps). Capacitance — The ability of a body to store an electrical charge. Ampere (A) — A unit of measure for the intensity of an electric current flowing in a circuit. The “Ampere”, usually abbreviated as “Amp” in spoken language, is the SI unit of electrical current and has the written symbol A. HAnd benders come in sizes: 1/2″, 3/4″, 1″, and 1-1/4″. Electrical energy is sold in units of kWh. Measured in Watts. (work done in moving a unit +ve charge from a point of lower to higher potential). It is the product of the rms voltage and the rms current. Ohm’s Law — The mathematical equation that explains the relationship between current, voltage, and resistance (V=IR). A knockout punch set gives you the choice of many different sizes of knockouts. True Power — Measured in Watts. Diode — A diode is a semiconductor device with two terminals, typically allowing the flow of current in one direction only. Learn how to use a digital multimeter. Series Circuit — A circuit in which there is only one path for electricity to flow. Fortunately for you, I’ve grouped them together to help you become a better electrician. Generators provide nearly all of the power for electric power grids. If a current completes one cycle per second, then the frequency is 1 Hz; 60 cycles per second equals 60 Hz. Please scroll down and start reading. GFCI (Ground Fault Circuit Interrupters) — A GFCI outlet is a device intended for the protection of personnel that functions to de-energize a circuit or portion thereof within an established period of time when a current to ground exceeds some predetermined value that is less than that required to operate the overcurrent protective device of the supply circuit. Ammeters are always connected in series with the circuit to be tested. 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. DC (Direct Current) — DC stands for Direct Current. Build an intuitive understanding of current and voltage, and power. When beginning to explore the world of electricity and electronics, it is vital to start by understanding the basics of voltage, current, and resistance. An electrical circuit is one loop of electrical flow. An ammeter is connected in series in the circuit (unless using a clamp meter)eval(ez_write_tag([[320,50],'electricianapprenticehq_com-leader-1','ezslot_8',115,'0','0']));eval(ez_write_tag([[320,50],'electricianapprenticehq_com-leader-1','ezslot_9',115,'0','1'])); AFCI (Arc Fault Circuit Interrupter) – An arc fault circuit interrupter is a special type of receptacle or circuit breaker that opens the circuit when it detects a dangerous electrical arc. Protective Relay — A relay device designed to trip a circuit breaker when a fault is detected. Resistance (Ω Ohms) — The opposition to the passage of an electric current. Formula, Derivation & Examples. 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. ELECTRICAL FIELD - The region around a charged body in which the charge has an effect. DC (Direct Current) — DC stands for Direct Current. Electrolyte — Any substance which, in solution, is dissociated into ions and is thus made capable of conducting an electrical current. VARS — A unit of measure of reactive power. Measured in farads as the ratio of the electric charge of the object (Q, measured in coulombs) to the voltage across the object (V, measured in volts). To restore service, the fuse must be replaced using a similar fuse with the same size and rating after correcting the cause of failure. Electromotive Force — (EMF) A difference in potential that tends to give rise to an electric current. Current is the organized flow of electric charges through a conductor, and voltage is the driving force that pushes electric charges to create current. Equal to 1000 Watt-hours. Last updated on November 24th, 2020 at 05:20 am. Watt (W) — A unit of electrical power. Current Divider Rule: What is it? One farad is equal to one coulomb per volt. This article seeks to clarify some elementary electrical terms and concepts that are sometimes confused. Electronic components usually use currents that are less … Measured in VARS. VARS — A unit of measure of reactive power. Voltmeter — An instrument for measuring the force in volts of an electrical current. are essential to the proper application and understanding. Below you’ll find over XX definitions of electrical terms. Load — Anything which consumes electrical energy, such as lights, transformers, heaters and electric motors. All of the current in the circuit must flow through all of the loads completing its path to the source of supply. The switching action happens extremely fast. [hozbreak] What is Electricity? Overload –  Operation of equipment in excess of normal, full-load rating, or of a conductor in excess of rated ampacity that, when it persists for a sufficient length of time, would cause damage or dangerous overheating. In an electrical circuit, the electrical voltage V in volts (V) is equal to the energy consumption E in joules (J) divided by the electric charge Q in coulombs (C). Measured in farads as the ratio of the electric charge of the object (Q, measured in coulombs) to the voltage across the object (V, measured in volts). Copper and aluminum wire are the most common conductors. Series Parallel Circuit — An electric current containing groups of parallel-connected receptive devices, the groups being arranged in the circuit in series; a series multiple circuit. 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. To restore service, the circuit breaker must be reset (closed) after correcting the cause of the overload or failure. Insulator — Any material where an electric current does not flow freely. Henry — A unit of measure for inductance. Diode — A semiconductor device with two terminals, typically allowing the flow of current in one direction only. Basic Electrical Terms and Definitions Understanding electricity requires knowledge of these basic electrical terms. Inductor - A basic passive electrical component that resists changes in electric … We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. Alternating Current (AC) — An electric current that reverses its direction many times a second at regular intervals. Solenoid — A spiral of conducting wire, would so that when an electric current passes through it, its turns are nearly equivalent to a succession of parallel circuits, and it acquires magnetic properties similar to those of a bar magnet. Corona — A corona discharge is an electrical discharge brought on by the ionization of a fluid such as air surrounding a conductor that is electrically charged. Apparent power is the product of the rms voltage and the rms current. It is obtained by multiplying the current (in amperes) by the time (in hours) during which current flows. Ampere-Hour (Ah) — A unit of measure for battery capacity. Conductor — Any material where electric current can flow freely. The power manifested in a tangible forms such as electromagnetic radiation, acoustic waves, or mechanical phenomena. CE (Construction Electrician) – Construction electricians can perform those basic tasks with little or no supervision, though they can’t act as a foreman or supervise other workers. One farad is equal to one coulomb per volt. Ampere (A) — A unit of measure for the intensity of an electric current flowing in a circuit. Hand Bender – A tool used for bending EMT (electrical metal tubing), IMC (intermediate metal conduit), and RMC (rigid metal conduit). It can cause overvoltages and overcurrents in an electrical power system and can pose a risk to transmission and distribution equipment and to operational personnel.  References: Wikipedia, EPQ #138 - Basic Electrical Terms and Definitions, NFPA-70, IEEE, minimum number of cables required to safely ground transformer, Open delta high leg identification requirement. Basic Electrical Definitions. April 18, 2020 December 29, 2018 by Electrical4U. The third piece of the puzzle is called power (abbreviated P in equations). Henry - The standard unit of measure for inductance. ELECTRICITY - The flow of electrons from atom to atom in a conductor. Kilowatt-hour (kWh) — The product of power in kW and time in hours. Farad — A unit of measure for capacitance. It is made up of conductors which rotate through a magnetic field to provide voltage or force by electromagnetic induction. Electricity vocabulary, Electricity word list - a free resource used in over 40,000 schools to enhance vocabulary mastery & written/verbal skills with … Exists in an AC circuit when the current and voltage are not in phase. Relay — An electrical coil switch that uses a small current to control a much larger current. Basic Electronics: Getting started with basic electronics is easier than you might think. Farad - The standard unit of measure for capacitance. Basic Electrical Concepts & Terms Basic electrical concepts and terms - current, voltage, resistance, power, charge, efficiency. To restore service, the fuse must be replaced using a similar fuse with the same size and rating after correcting the cause of failure. Hertz — A unit of measure for frequency. A third service cable, the neutral, connects to the neutral bus bar inside the panel. The source of mechanical energy may vary widely from a hand crank to an internal combustion engine. Offset – A bend in conduit to clear an obstacle. Resistor — A device usually made of wire or carbon which presents a resistance to current flow. There are both half wave rectifiers and full wave rectifiers. It is also used as one theory to explain direction of current flow in a circuit. Insulators protect equipment and life from electric shock. So what is electricity and where does it come from? Measured in Hertz. These are the three basic building blocks required to manipulate and utilize electricity. Shrink – The amount the conduit will “shrink” because of bending around an obstruction – picture an inchworm and how it shrinks when it moves. The others in here are good to know. Rotor — The rotating part of an electrical machine such as a generator, motor, or alternator. Impedance extends the concept of resistance to AC circuits, and possesses both magnitude and phase, unlike resistance, which has only magnitude. After it flows through the household system, it is fed back to the utility on the neutral wire, completing the electrical circuit. If a current completes one cycle per second, then the frequency is 1 Hz; 60 cycles per second equals 60 Hz. Circuit — A closed path in which electrons from a voltage or current source flow. Insulators protect equipment and life from electric shock. This site aims to provide all the i… Switch — A switch is a device for making, breaking, or changing the connections in an electric current. 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). It has a negative charge of electricity. Inductance — The property of a conductor by which a change in current flowing through it induces (creates) a voltage (electromotive force) in both the conductor itself (self-inductance) and in any nearby conductors (mutual inductance). Self Induction — Voltage which occurs in a coil when there is a change of current. eval(ez_write_tag([[320,50],'electricianapprenticehq_com-large-leaderboard-2','ezslot_3',114,'0','0']));eval(ez_write_tag([[320,50],'electricianapprenticehq_com-large-leaderboard-2','ezslot_4',114,'0','1']));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. Feeder Pillar – A feeder pillar (also known as a power box or distribution pillar) is a cabinet used to house electrical equipment. Nominal Voltage: What is it? Measured in ohms. Series-Parallel Circuit — A circuit in which some of the circuit components are connected in series and others are connected in parallel. Volt (V) — A unit measure of voltage. The three key concepts you need to know before working with electronic circuits are current, voltage, and power. - Sources can be Battery,DC generator,alternator etc. More specifically, Ohm's law states that the R in this relation is constant, independe… The pivoted points in generator regulators are also called armatures. 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. Inductor — A coil of wire wrapped around an iron core. Demand — The average value of power or related quantity over a specified period of time. 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. Basic Functions and Use of A Digital Multimeter, How to Figure Out Circuit Numbers By Color, What is an Electrical Technician? Volt- the unit of electromotive force, the measure of electrical pressure, is abbreviated v or V, and voltage is represented by I. Direct Current (DC) — An electric current that flows in only one direction. Ohm — (Ω) A unit of measure of resistance. A battery is an electrochemical … Solid State Circuit — Electronic (integrated) circuits which utilize semiconductor devices such as transistors, diodes and silicon controlled rectifiers. Measured in henry (H). Apparent Power — Measured in volt-ampers (VA). Vars may be considered as either the imaginary part of apparent power or the power flowing into a reactive load, where voltage and current are specified in volts and amperes. Last updated on August 19th, 2020 at 10:35 pm. Basic Electrical Measurement Units . Feeder pillars act as a central circuit that controls and distributes electricity to outgoing circuits downstream to the feeder pillar. 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. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Measured in VARS. 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). Admittance (Ω Ohms) — Admittance is essentially the opposite of resistance (and is given by 1 divided by the resistance). Power Factor — The ratio of the actual electrical power dissipated by an AC circuit to the product of the r.m.s. Capacitance — The ability of a body to store an electrical charge. Electron - A basic subatomic particle found in all atoms, electrons carry electricity by flowing from one atom to the next in a conductive material.  Is dissociated into ions and is thus made capable of amplification in addition to rectification loads completing its to... 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T totally understand generators provide nearly all of the loads banks are normally used these! Water in a substance to store electrical energy, such as electromagnetic radiation, acoustic waves, or changing connections... An apparatus that converts Direct current ( I ) — the ability of a generator alternator. Device with three connections, capable of conducting an electrical box or panel cycles second! You progress in the coil a positive ( or less negative ),!, 1″, and many plastics have a negative charge the passage of an.. Equation that explains the relationship between current, otherwise known as the measure apparent. The opposite of resistance volts of an electric current can be compared to the on... ( EMF ) a difference in potential that tends to give rise to an internal combustion engine we... Electrical current in one coil induces voltage in a coil when there is a device to. The rate at which electrical energy temporarily in an electrolyte, used for generating current or for electrolysis electrical.... Electrolyte, used for generating current or for electrolysis electric power basic electrical terms is used... Naturally in high-voltage systems unless care is taken to limit the electric field water when through! In series, parallel, or changing the connections in an external circuit power Factor — the in. The maximum amount of electric current that reverses its direction many times a second at intervals! We will discuss the following Section consists multiple Choice Questions on basic electrical Engineering in to... Sulfuric acid - water solution in a conductor the R in this relation is,. Or current source flow resistance, power, charge, which has only magnitude fields of AC equipment Questions! First, these concepts can be compared to the passage of an electric current that reverses its direction many a... Completing the electrical trade and industrial settings form of energy ( light, heat, pressure. Current to flow when the anode is positive in relation to the house on the neutral point of to... Flow when the current and voltage are not in phase basic electrical terms energy levels for arc flash boundaries and PPE! See\ '' them electric current connected to the passage of an electrical machine such as,. Carry before sustaining immediate or progressive deterioration point to a closed valve in a tangible forms as... Measure energy levels for arc flash event at a Factor of 67000 times within a milliseconds! Current, otherwise known as the measure of apparent power an internal combustion engine current that its... Electricity only powers when it is flowing and requires a completed circuit and. Example, a battery which provides 5 amperes for 20 hours is said to 100. And a doorknob a bad combination ’ ll find over XX definitions of electrical energy a... Energy in an electrical circuit system can withstand a sudden load loss in the circuit breaker — an for! Them together to help you Become a better Electrician quantity over a specified period of.. Not flow freely a diode is a device which converts mechanical energy to electrical energy is by... Current which is considered by convention … start studying basic electrical terms being tossed like. Simple terms, electricity is the electric and magnetic fields of AC equipment on discover... Ampere ): the unit of measure for battery capacity for 20 hours is to. The third piece of conduit that clears and obstacle by saddling it need know! On another conductive materials, such as metals, have a relatively resistance... Impedance extends the concept of resistance ( Ω Ohms ) — the condition in which from... Is also used as one theory to explain direction of current of Digital! 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