In simple terms, electricity is supplied to the house on the hot wires. Hand Bender – A tool used for bending EMT (electrical metal tubing), IMC (intermediate metal conduit), and RMC (rigid metal conduit). Switchgear – The combination of electrical disconnect switches, fuses or circuit breakers used to control, protect, and isolate electrical equipment. To restore service, the circuit breaker must be reset (closed) after correcting the cause of the overload or failure. Basic Electrical Definitions. Copper and aluminum wire are the most common conductors used in the electrical trade. Electron - A basic subatomic particle found in all atoms, electrons carry electricity by flowing from one atom to the next in a conductive material. Ampere (A) — A unit of measure for the intensity of an electric current flowing in a circuit. Load Rejection — The condition in which there is a sudden load loss in the system which causes the generating equipment to be over-frequency. 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. 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 … Insulating materials, such as glass, rubber, air, and many plastics have relatively high resistance. Apparent Power — Measured in volt-ampers (VA). Semiconductor — A solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. One farad is equal to one coulomb per volt. Ammeters are always connected in series with the circuit to be tested. Spontaneous corona discharges occur naturally in high-voltage systems unless care is taken to limit the electric field strength. 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). It is obtained by multiplying the current (in amperes) by the time (in hours) during which current flows. An electrical circuit is one loop of electrical flow. The images shown over at Electrical4U can make it a lot easier to understand. 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. Inverter — An apparatus that converts direct current into alternating current. Arc flash temperatures can reach or exceed 35,000 °F. ELECTROCHEMICAL - The relationship of electricity to chemical changes and with the conversions of chemical and electrical energy. Reactive Power — The portion of electricity that establishes and sustains the electric and magnetic fields of AC equipment. Hertz — A unit of measure for frequency. The switching action happens extremely fast. 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. 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. More importantly, why is carpet, socks and a doorknob a bad combination? A Glossary of Electrical Terms Become an Electrician Electricians are skilled tradespeople working in a variety of different residential and industrial settings. Knockout Set – Known more specifically as an electrical knockout set or knockout punch. Measured in VARS. 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. Basic Electrical Terms When you engage an electrician in Sydney, it can be a little confusing when you are talking to them. Why should you understand electricity Current and amperes Potential difference and volts Relationship between potential difference and current Sources of potential difference Concept of resistance Ohms Law DC and AC current If a current completes one cycle per second, then the frequency is 1 Hz; 60 cycles per second equals 60 Hz. 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. The third piece of the puzzle is called power (abbreviated P in equations). Formula, Derivation & Examples. If a current completes one cycle per second, then the frequency is 1 Hz; 60 cycles per second equals 60 Hz. 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). Circuit breakers are used in conjunction with protective relays to protect circuits from faults. Impedance extends the concept of resistance to AC circuits, and possesses both magnitude and phase, unlike resistance, which has only magnitude. HAnd benders come in sizes: 1/2″, 3/4″, 1″, and 1-1/4″. It has a negative charge of electricity. Electrolyte — Any substance which, in solution, is dissociated into ions and is thus made capable of conducting an electrical current. Cycle — The change in an alternating electrical sine wave from zero to a positive peak to zero to a negative peak and back to zero. 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. Farad - The standard unit of measure for capacitance. Voltage (E) — 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. When beginning to explore the world of electricity and electronics, it is vital to start by understanding the basics of voltage, current, and resistance. Equal to 1000 Watt-hours. Polarity — A collective term applied to the positive (+) and negative ( - ) ends of a magnet or electrical mechanism such as a coil or battery. Ampacity — The maximum amount of electric current a conductor or device can carry before sustaining immediate or progressive deterioration. 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). (Job Description And Salary), Faraday’s law of electromagnetic induction, A Complete Guide To Electrical Tape (Best Electrical Tape of 2020), Best Electricians Tools List: Top Electrical Tools of 2020, Best Electrician Knife: Top 7 of 2020 (Pocket, Hawkbill & Wire Skinning), Best Hard Hats For Electricians (Top Picks of 2020), Gift Ideas for Electricians: Top 8 of 2020 Reviewed, Ohms Law Power Wheel: Understanding the Electrical Formula Wheel, How To Join The IBEW Electrician Apprenticeship Program. DC (Direct Current) — DC stands for Direct Current. The power manifested in tangible form 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. Last updated on August 19th, 2020 at 10:35 pm. Arc Blast – The intense heat from an arc causes sudden expansion of air resulting in a blast. Inductor — A coil of wire wrapped around an iron core. - Sources can be Battery,DC generator,alternator etc. November 23, 2020 Danielle Wexler No Comments. Current (I) — The flow of an electric charge through a conductor. One ampere is equal to a current flow of one coulomb per second. 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). Measured in VARS. Ampere is the basic unit for measuring electrical current. Shrink is added to the overall distance to the obstruction to compensate before bending. Alternating Current (AC) — An electric current that reverses its direction many times a second at regular intervals. Replacing the earlier term of cycle per second (cps). Power Factor — The ratio of the actual electrical power dissipated by an AC circuit to the product of the r.m.s. Admittance (Ω Ohms) — Admittance is essentially the opposite of resistance (and is given by 1 divided by the resistance). Lenz’s law states that the direction of the current induced in a conductor by a changing magnetic field (as per Faraday’s law of electromagnetic induction) is such that the magnetic field created by the induced current opposes the initial changing magnetic field which produced it. Capacitance — The ability of a body to store an electrical charge. See Frequency. 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. Open Circuit — An open or open circuit occurs when a circuit is broken, such as by a broken wire or open switch, interrupting the flow of current through the circuit. So what is electricity and where does it come from? Conductor — Any material where electric current can flow freely. Henry — A unit of measure for inductance. Ohm — (Ω) A unit of measure of resistance. 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. August 19, 2020 October 11, 2020. Piezoelectricity — Electric polarization in a substance (especially certain crystals) resulting from the application of mechanical stress (pressure). Learn vocabulary, terms, and more with flashcards, games, and other study tools. There are both half wave rectifiers and full wave rectifiers. This is an electric current that reverses its direction many times a second at regular intervals. It is made up of conductors which rotate through a magnetic field to provide voltage or force by electromagnetic induction. ELECTRICITY - The flow of electrons from atom to atom in a conductor. Load banks are normally used for these tests as part of the commissioning process for electrical power systems. Apparent power is the product of the rms voltage and the rms current. into electrical energy so that we can interpret what’s … Electronic sensors convert some other form of energy (light, heat, sound pressure, etc.) 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. The source of mechanical energy may vary widely from a hand crank to an internal combustion engine. Reluctance — The resistance that a magnetic circuit offers to lines of force in a magnetic field. Parallel Circuit — A circuit in which there are multiple paths for electricity to flow. V is the voltage measured in volts (V) 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. Electrical energy is sold in units of kWh. 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. Electric charge refers to a fundamental property of matter that even physicists don’t totally understand. Diode — A diode is a semiconductor device with two terminals, typically allowing the flow of current in one direction only. 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 inductance is directly proportional to the number of turns in the coil. 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. 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. Circuits can be in series, parallel, or in any combination of the two. Farad — A unit of measure for capacitance. Voltage, measured in volts (V), is the measure of potential energy per unit of charge. Classic manual knockout punches are operated with a socket wrench. Circuit — A closed path in which electrons from a voltage or current source flow. Measured in henry (H). Apparent Power — Measured in volt-ampers (VA). 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. 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. Fortunately for you, I’ve grouped them together to help you become a better electrician. Take the Quiz and improve your overall Engineering. To restore service, the fuse must be replaced using a similar fuse with the same size and rating after correcting the cause of failure. - Unit of voltage is volt (v). The electrons always flow from a negative point to a positive (or less negative) point, because electrons have a negative charge. Commonly used for filtering out voltage spikes. Conductive materials, such as metals, have a relatively low resistance. August 31, 2020 October 11, 2020. The first time I heard someone …. DC current is an electric current that flows in only one direction. Basic Electrical Circuit Terms. (work done in moving a unit +ve charge from a point of lower to higher potential). The voltage (of a circuit) is the effective (greatest root-mean-square) difference of potential One farad is equal to one coulomb per volt. Circuit Breaker — An automatic device for stopping the flow of current in an electric circuit. Short Circuit — A fault in an electric circuit or apparatus due usually to imperfect insulation, such that the current follows a by-path and inflicts damage or is wasted. One volt is equal to the difference of potential that would drive one ampere of current against one ohm resistance. ELECTRICAL FIELD - The region around a charged body in which the charge has an effect. The Following Section consists Multiple Choice Questions on Basic Electrical Engineering. Circuit — A closed path in which electrons from a voltage or current source flow. VARS — A unit of measure of reactive power. Basic Electrical. All of the current in the circuit must flow through all of the loads completing its path to the source of supply. 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. If it’s slang terms you’re looking for, then look no further: American Job Site Slangeval(ez_write_tag([[320,50],'electricianapprenticehq_com-box-4','ezslot_5',112,'0','0']));eval(ez_write_tag([[320,50],'electricianapprenticehq_com-box-4','ezslot_6',112,'0','1'])); AC (Alternating Current) — AC stands for Alternating Current. A knockout punch is an electrician’s favorite tool for making new holes in an electrical box or panel. Sharpen your skills with our collection of quizzes on electrical safety, maintenance & testing of electrical equipment and industry standards. Semiconductor — A solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Circuits can be in series, parallel, or in any combination of the two. Measured in volts. Power — The rate at which electrical energy is transferred by an electric circuit. Measured in volts. Farad — A unit of measure for capacitance. In its simplest terms, electricity is the movement of charge, which is considered by convention … Reactive Power — Reactive power is the portion of electricity that establishes and sustains the electric and magnetic fields of AC equipment. Current (I) — The flow of an electric charge through a conductor. 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. 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). Devices made of semiconductors, notably silicon, are essential components of most electronic circuits. Volt-Ampere (VA) — A unit of measure of apparent power. Feeder pillars act as a central circuit that controls and distributes electricity to outgoing circuits downstream to the feeder pillar. Resistance — The opposition to the passage of an electric current. Read on to discover more about basic electrical theory. Let’s start with three very basic concepts of electricity: namely, electric charge, electric current, and electric circuit. Kilowatt-hour (kWh) — The product of power in kW and time in hours. Watt (W) — A unit of electrical power. Henry - The standard unit of measure for inductance. More specifically, Ohm's law states that the R in this relation is constant, independe… Electronic components usually use currents that are less … What is a Journeyman Electrician (And How To Become One)? Insulators protect equipment and life from electric shock. Henry — A unit of measure for inductance. I realize that can sound like a lot of gobbledygook. Batteryis a container consistin… Frequency — The number of cycles per second. The three key concepts you need to know before working with electronic circuits are current, voltage, and power. 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. 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. 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. For example, a battery which provides 5 amperes for 20 hours is said to deliver 100 ampere - hours. Frequency — The number of cycles per second. DC (Direct Current) — DC stands for Direct Current. Offset – A bend in conduit to clear an obstacle. A load rejection test confirms that the system can withstand a sudden loss of load and return to normal operating conditions using its governor. An electric current can be compared to the flow of water in a pipe. Ground Fault Circuit Interrupters (GFCI) — 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. (vs. Operating & Rated … A fault, such as a short circuit or ground fault, is not an overload. Ohm — (Ω) A unit of measure of resistance. SCR (Solid State Relay) – An electronic switching device that switches on or off when a small external voltage is applied across its control terminals. Inductor - A basic passive electrical component that resists changes in electric … The pivoted points in generator regulators are also called armatures. Nominal Voltage: What is it? of Beginners' Electrical design course EE-1. One ohm is equivilant to the resistance in a circuit transmitting a current of one ampere when subjected to a potential difference of one volt. VARS — A unit of measure of reactive power. 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. It takes years to get a firm understanding of what they all mean. The sulfuric acid - water solution in a storage battery is an electrolyte. Ampere-Hour (Ah) — A unit of measure for battery capacity. Current Divider Rule: What is it? DMM (Digital Multimeter) – A DMM or digital multimeter is an electronic measurement tool that can measure voltage, current, resistance, capacitance, temperature, frequency. Conductive materials, such as metals, have relatively low resistance. Variable Resistor — A resistor that can beadjusted to different ranges of value. Demand — The average value of power or related quantity over a specified period of time. The others in here are good to know. 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. This is the difference of potential (voltage) between different points in an electrical circuit. Earth electrodeis a metal plate or other conducting elements of electricity partially buried in the earth to constitute and provide a reliable conductive path for the fault current to the ground. Basic Electronics: Getting started with basic electronics is easier than you might think. Fundamentals. Electrical energy is sold in units of kWh. Written by Willy McAllister. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits. Generators provide nearly all of the power for electric power grids. 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. Capacitance — The ability of a body to store an electrical charge. Load — Anything which consumes electrical energy, such as lights, transformers, heaters and electric motors. Dielectric constant — A quantity measuring the ability of a substance to store electrical energy in an electric field. 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). Insulator — Any material where electric current does not flow freely. Volt- the unit of electromotive force, the measure of electrical pressure, is abbreviated v or V, and voltage is represented by I. Calorie — The French heat unit. Measured in Watts. Measured in volts. Ammeter — Measures the current flow in amperes in a circuit. Current is the organized flow of electric charges through a conductor, and voltage is the driving force that pushes electric charges to create current. Apparent power is the product of the rms voltage and the rms current. Diodes allow current to flow when the anode is positive in relation to the cathode. Amp (Ampere): The unit of intensity of electrical current, otherwise known as the measure of electrical flow. Ohm’s Law — The mathematical equation that explains the relationship between current, voltage, and resistance (V=IR). Basic Electrical Terms and Definitions Understanding electricity requires knowledge of these basic electrical terms. These are the three basic building blocks required to manipulate and utilize electricity. Kilowatt-hour (kWh) — The product of power in kW and time in hours. Electrical resistance can be compared to the friction experienced by water when flowing through a pipe. Diode — A semiconductor device with two terminals, typically allowing the flow of current in one direction only. Power — The rate at which electrical energy is transferred by an electric circuit. Exists in an AC circuit when the current and voltage are not in phase. [hozbreak] What is Electricity? Ammeter — An instrument for measuring the flow of electrical current in amperes. Below you’ll find over XX definitions of electrical terms. Fuse — A circuit interrupting device consisting of a strip of wire that melts and breaks an electric circuit if the current exceeds a safe level. Electrical resistance can be compared to the friction experienced by water when flowing through a pipe. Ampere (A) — A unit of measure for the intensity of an electric current flowing in a circuit. Armature — The movable part of a generator or motor. As you progress in the electrical trade you’ll hear a bunch of electrical terms being tossed around like their common knowledge. Electricity only powers when it is flowing and requires a completed circuit. Learn how to use a digital multimeter. Series Circuit — A circuit in which there is only one path for electricity to flow. Circuit Breaker — An automatic device for stopping the flow of current in an electric circuit. Resistance (Ω Ohms) — The opposition to the passage of an electric 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. Electron theory — The theory which explains the nature of electricity and the exchange of "free" electrons between atoms of a conductor. Feeder – All circuit conductors between the service equipment, the source of a separately derived system, or other power supply source and the final branch-circuit overcurrent device. Exists in an AC circuit when the current and voltage are not in phase. 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. Measured in ohms. Milliampere, or milliamp: 1/1000 of an Ampere. True Power — Measured in Watts. Generator — A device which converts mechanical energy into electrical energy. Basic Electrical Measurement Units . At first, these concepts can be difficult to understand because we cannot \"see\" them. This site aims to provide all the i… Self Induction — Voltage which occurs in a coil when there is a change of current. What is a Milliampere Equal To? Gain – The difference between the sum of the straight distances and the actual length of the conduit (how much the conduit will grow after being bent). It’s used to prevent electrical fires. 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. Commonly used for filtering out voltage spikes. Solid State Circuit — Electronic (integrated) circuits which utilize semiconductor devices such as transistors, diodes and silicon controlled rectifiers. Ohmmeter — An instrument for measuring the resistance in ohms of an electrical circuit. Measured in Hertz. Measured in amperes. φ 1 is the electric potential at point #1 in volts (V). This Instructable will hopefully demystify the basics of electronics so that … Resistor — A device usually made of wire or carbon which presents a resistance to current flow. 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). Electricity is the flow of electrical energy through some conductive material.Electronics refers to using changing electrical properties to convey information. , these concepts can be in series, parallel, or changing the connections in electrical! 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