into electrical energy so that we can interpret what’s … An electric current can be compared to the flow of water in a pipe. Build an intuitive understanding of current and voltage, and power. Milliampere, or milliamp: 1/1000 of an Ampere. A Glossary of Electrical Terms Become an Electrician Electricians are skilled tradespeople working in a variety of different residential and industrial settings. The switching action happens extremely fast. Polarity — A collective term applied to the positive (+) and negative ( - ) ends of a magnet or electrical mechanism such as a coil or battery. Power — The rate at which electrical energy is transferred by an electric circuit. Electrical Terms For Circuits AC (Alternating Current) — AC stands for Alternating Current. Reactive Power — Reactive power is the portion of electricity that establishes and sustains the electric and magnetic fields of AC equipment. Insulators protect equipment and life from electric shock. 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. It is the product of the rms voltage and the rms current. Current Divider Rule: What is it? Resistance — The opposition to the passage of an electric current. Last updated on November 24th, 2020 at 05:20 am. Calorie — The French heat unit. The electrons always flow from a negative point to a positive (or less negative) point, because electrons have a negative charge. (vs. Operating & Rated … 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. Impedance extends the concept of resistance to AC circuits, and possesses both magnitude and phase, unlike resistance, which has only magnitude. Feeder pillars act as a central circuit that controls and distributes electricity to outgoing circuits downstream to the feeder pillar. 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. Basic Electronics: Getting started with basic electronics is easier than you might think. A battery is an electrochemical … An electric current can be compared to the flow of water in a pipe. Basic Electrical Terms and Definitions Understanding electricity requires knowledge of these basic electrical terms. Measured in Hertz. Kilowatt-hour (kWh) — The product of power in kW and time in hours. Protective Relay — A relay device designed to trip a circuit breaker when a fault is detected. Variable Resistor — A resistor that can beadjusted to different ranges of value. Parallel Circuit — A circuit in which there are multiple paths for electricity to flow. 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 After it flows through the household system, it is fed back to the utility on the neutral wire, completing the electrical circuit. Batteryis a container consistin… 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). Ampacity — The maximum amount of electric current a conductor or device can carry before sustaining immediate or progressive deterioration. Basics of electricity- Potential - Ability to do work Voltage - Potential difference. 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. Electric charge refers to a fundamental property of matter that even physicists don’t totally understand. Insulators protect equipment and life from electric shock. 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). Measured in volts. 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. Insulator — Any material where electric current does not flow freely. Arc flash temperatures can reach or exceed 35,000 °F. The voltage (of a circuit) is the effective (greatest root-mean-square) difference of potential 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. Using a “water-in-pipes” analogy, voltage in the electrical system is similar to water pressure in a … Circuit — A closed path in which electrons from a voltage or current source flow. Frequency — The number of cycles per second. Mutual Induction — Occurs when changing current in one coil induces voltage in a second coil. Capacitance — The ability of a body to store an electrical charge. Resistor — A device usually made of wire or carbon which presents a resistance to current flow. Insulating materials, such as glass, rubber, air, and many plastics have relatively high resistance. Learn how to use a digital multimeter. Sharpen your skills with our collection of quizzes on electrical safety, maintenance & testing of electrical equipment and industry standards. Direct Current (DC) — An electric current that flows in only one direction. 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. For example, a battery which provides 5 amperes for 20 hours is said to deliver 100 ampere - hours. Four Bend Saddle – Four bends in a piece of conduit that clears and obstacle by saddling it. Current (I) — The flow of an electric charge through 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. So what is electricity and where does it come from? Ohm — (Ω) A unit of measure of resistance. Measured in henry (H). One farad is equal to one coulomb per volt. It’s used to prevent electrical fires. A knockout punch is an electrician’s favorite tool for making new holes in an electrical box or panel. Equal to 1000 Watt-hours. Ground — 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. Capacitor – A passive two-terminal electrical component used to store electrical energy temporarily in an electric field. V is the voltage measured in volts (V) Electrolyte — Any substance which, in solution, is dissociated into ions and is thus made capable of conducting an electrical current. Measured in VARS. 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. Circuit Breaker — An automatic device for stopping the flow of current in an electric circuit. There are both half wave rectifiers and full wave rectifiers. For example your lighting is on one electrical circuit, and you air conditioning is on another. Replacing the earlier term of cycle per second (cps). Farad — A unit of measure for capacitance. Electrical energy is sold in units of kWh. Fortunately for you, I’ve grouped them together to help you become a better electrician. 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). Electricity only powers when it is flowing and requires a completed circuit. 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. A fault, such as a short circuit or ground fault, is not an overload. An electrical circuit is one loop of electrical flow. Electronic sensors convert some other form of energy (light, heat, sound pressure, etc.) Measured in volts. Conductive materials, such as metals, have a relatively low resistance. Self Induction — Voltage which occurs in a coil when there is a change of current. 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. Ammeter — An instrument for measuring the flow of electrical current in amperes. 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. ELECTRICAL FIELD - The region around a charged body in which the charge has an effect. Henry - The standard unit of measure for inductance. Written by Willy McAllister. Feeder Pillar – A feeder pillar (also known as a power box or distribution pillar) is a cabinet used to house electrical equipment. 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. Used to measure energy levels for Arc Flash boundaries and proper PPE when working on energized electrical equipment. DC (Direct Current) — DC stands for Direct Current. True Power — Measured in Watts. Knockout Set – Known more specifically as an electrical knockout set or knockout punch. Measured in VARS. One ampere is equal to a current flow of one coulomb per second. Offset – A bend in conduit to clear an obstacle. 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. are essential to the proper application and understanding. April 18, 2020 December 29, 2018 by Electrical4U. Circuit Breaker — An automatic device for stopping the flow of current in an electric circuit. DC current is an electric current that flows in only one direction. Ohm — (Ω) A unit of measure of resistance. Demand — The average value of power or related quantity over a specified period of time. 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). Conductor — Any material where electric current can flow freely. A third service cable, the neutral, connects to the neutral bus bar inside the panel. Watt (W) — A unit of electrical power. - Sources can be Battery,DC generator,alternator etc. 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. Voltmeter — An instrument for measuring the force in volts of an electrical current. Farad — A unit of measure for capacitance. 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). Basic Electrical Concepts & Terms Basic electrical concepts and terms - current, voltage, resistance, power, charge, efficiency. November 23, 2020 Danielle Wexler No Comments. Load — Anything which consumes electrical energy, such as lights, transformers, heaters and electric motors. 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 … 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). Service — The conductors and equipment used to deliver energy from the electrical supply system to the system being served. 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. The first time I heard someone …. Let’s start with three very basic concepts of electricity: namely, electric charge, electric current, and electric circuit. Amp (Ampere): The unit of intensity of electrical current, otherwise known as the measure of electrical flow. Capacitor — A device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator. 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. Current (I) — The flow of an electric charge through a conductor. Ohm’s Law — The mathematical equation that explains the relationship between current, voltage, and resistance (V=IR). We will discuss the following aspects. Spontaneous corona discharges occur naturally in high-voltage systems unless care is taken to limit the electric field strength. Electrical resistance can be compared to the friction experienced by water when flowing through a pipe. Start studying Basic electrical terms. of Beginners' Electrical design course EE-1. Henry — A unit of measure for inductance. To restore service, the circuit breaker must be reset (closed) after correcting the cause of the overload or failure. Apparent power is the product of the rms voltage and the rms current. These are the three basic building blocks required to manipulate and utilize electricity. Generators provide nearly all of the power for electric power grids. Measured in amperes. Ohm's Law — The mathematical equation that explains the relationship between current, voltage, and resistance (V=IR). DC (Direct Current) — DC stands for Direct Current. SWR Meter: What Is It & How To Use It. 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. This is the difference of potential (voltage) between different points in an electrical circuit. 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. The difference between the two is caused by reactance in the circuit and represents power that does no useful work. The sulfuric acid - water solution in a storage battery is an electrolyte. One volt is equal to the difference of potential that would drive one ampere of current against one ohm resistance. Load banks are normally used for these tests as part of the commissioning process for electrical power systems. All of the current in the circuit must flow through all of the loads completing its path to the source of supply. Capacitance — The ability of a body to store an electrical charge. Please scroll down and start reading. Circuit breakers are used in conjunction with protective relays to protect circuits from faults. Series-Parallel Circuit — A circuit in which some of the circuit components are connected in series and others are connected in parallel. Power — The rate at which electrical energy is transferred by an electric circuit. Measured in henry (H). Current is the organized flow of electric charges through a conductor, and voltage is the driving force that pushes electric charges to create current. 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. One cannot … 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. (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. Last updated on August 19th, 2020 at 10:35 pm. Volt-Ampere (VA) — A unit of measure of apparent power. Insulative materials, such as glass, rubber, air, and many plastics have a relatively high resistance. Relay — An electrical coil switch that uses a small current to control a much larger current. Capacitor: … 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. Series Circuit — A circuit in which there is only one path for electricity to flow. Ampere (A) — A unit of measure for the intensity of an electric current flowing in a circuit. A load rejection test confirms that the system can withstand a sudden loss of load and return to normal operating conditions using its governor. I realize that can sound like a lot of gobbledygook. Measured in Watts. Kilowatt-hour (kWh) — The product of power in kW and time in hours. True Power — Measured in Watts. Basic Functions and Use of A Digital Multimeter, How to Figure Out Circuit Numbers By Color, What is an Electrical Technician? Piezoelectricity — Electric polarization in a substance (especially certain crystals) resulting from the application of mechanical stress (pressure). Plain language definitions of electrical terms: Definition of amps, volts, watts, resistance, current, ohms, electrical phases. 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. 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. Switch — A switch is a device for making, breaking, or changing the connections in an electric current. The power manifested in a tangible forms such as electromagnetic radiation, acoustic waves, or mechanical phenomena. Equal to 1000 Watt-hours. Shrink – The amount the conduit will “shrink” because of bending around an obstruction – picture an inchworm and how it shrinks when it moves. 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. ELECTRICITY - The flow of electrons from atom to atom in a conductor. 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. Demand — The average value of power or related quantity over a specified period of time. Circuits can be in series, parallel, or in any combination of the two. 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. Measured in amperes. 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. Electricity is the flow of electrical energy through some conductive material.Electronics refers to using changing electrical properties to convey information. 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. It is the product of the rms voltage and the rms current. 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. 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. Henry — A unit of measure for inductance. Basic Electrical Definitions. 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. It is obtained by multiplying the current (in amperes) by the time (in hours) during which current flows. 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. Transistor — A semiconductor device with three connections, capable of amplification in addition to rectification. Grounded Conductor – A system or circuit conductor that is intentionally grounded.eval(ez_write_tag([[320,50],'electricianapprenticehq_com-banner-1','ezslot_1',113,'0','0']));eval(ez_write_tag([[320,50],'electricianapprenticehq_com-banner-1','ezslot_2',113,'0','1'])); Grounded (Grounding) – Connected (connecting) to the ground or to a conductive body that extends the ground connection. It is made up of conductors which rotate through a magnetic field to provide voltage or force by electromagnetic induction. Series Circuit — A circuit in which there is only one path for electricity to flow. Ampere is the basic unit for measuring electrical current. Watt (W) — A unit of electrical power. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Electromotive Force — (EMF) A difference in potential that tends to give rise to an electric current. As you progress in the electrical trade you’ll hear a bunch of electrical terms being tossed around like their common knowledge. Basic Electrical. Circuits can be in series, parallel, or in any combination of the two. Alternating Current (AC) — An electric current that reverses its direction many times a second at regular intervals. 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). values of current and voltage. 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. Reluctance — The resistance that a magnetic circuit offers to lines of force in a magnetic field. Inverter — An apparatus that converts direct current into alternating current. Basic Electrical Measurement Units . Waveform — A graphical representation ofelectrical cycles which shows the amount of variation in amplitude over some period of time. August 19, 2020 October 11, 2020. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits. This article seeks to clarify some elementary electrical terms and concepts that are sometimes confused. It is also used as one theory to explain direction of current flow in a circuit. Generator – A device that converts mechanical energy to electrical energy for use in an external circuit. August 31, 2020 October 11, 2020. Below you’ll find over XX definitions of electrical terms. Frequency — The number of cycles per second. Classic manual knockout punches are operated with a socket wrench. Basic Electrical Circuit Terms. Inductance (H) — 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). One volt is equal to the difference of potential that would drive one ampere of current against one-ohm resistance. 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 its simplest terms, electricity is the movement of charge, which is considered by convention … 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). 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. Farad - The standard unit of measure for capacitance. Formula, Derivation & Examples. If a current completes one cycle per second, then the frequency is 1 Hz; 60 cycles per second equals 60 Hz. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits. This Instructable will hopefully demystify the basics of electronics so that … Take the Quiz and improve your overall Engineering. The “Ampere”, usually abbreviated as “Amp” in spoken language, is the SI unit of electrical current and has the written symbol A. φ 1 is the electric potential at point #1 in volts (V). 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. 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