By using our extensive list for reference, you can familiarise yourself with some of the lesser known terms, and better understand more commonly used slang. Bayonet cap (BC): A lamp base with a pin mechanism, requiring a push-and-turn to insert into the lampholder. Local authority building control (LABC): The department which controls building standards, including electrical installation. Here we have compiled a glossary of terms and definitions for reference purposes. Searching for an electrician? Home Run: The main line running from the electrical service panel to the first device in the electrical circuit. Electrical Safety: Identify the electrical circuits found in the project area, turn them OFF and Tag them with a Note before working with the electrical wiring. Notifiable work – Electrical work that requires the relevant building control body to be notified, examples include installing a new circuit or replacing a consumer unit. Homes carved from sandstone cliffs in England. RCD – Residual Current Device, this is a type of device used to disconnect the electrical supply to a circuit, or bank of circuits in the event of a fault from line to earth. Terminology. Like many professions, electricians have their own dictionary of terminology and slang. Bonding: Connections on exposed wires to prevent electric shock. Consumer control unit (CCU): A distribution board containing a main switch or main RCD, along with one or more circuit breakers, RCBOs or RCDs. Residual current circuit breaker with overcurrent protection (RCBO): A device designed to protect a circuit, combining features of a circuit breaker and an RCD. Its purpose is to disconnect the supply of electricity to the installation. Get in touch to request a free, no-obligation quotation today. ... New national seismic hazard maps for the UK. Electrical definition - Designing Buildings Wiki - Share your construction industry knowledge. Main switch (5) – Although not a protective device, in a typical household, the mains switch is located in the consumer unit. June 02, 2010 By Grant Winter Since electricity is not something that can be seen, it is difficult for many people to understand how it works. Distribution board (DB): A piece of equipment used to connect circuits to an electricity supply. Electrical Panel: An insulated panel used to connect electrical wires to circuit breakers. Earth fault loop path – This is the path the electricity flows when a fault arises causing the activation of the protective device for the circuit affected, starting at the point of the fault: Electrical equipment – When using the phrase ‘electrical equipment’ this can refer to any item that is part of the electrical system, such as fuses, generators, transformers etc. The standard unit for electric current is the ampere. Over current – this is where the current exceeds the rated current of the electrical equipment; with over current the circuit is considered unhealthy. Isolator – This is a device that is mechanically operated and is capable of isolating a particular circuit/piece of equipment as required. Ohm’s Law: The equation V=IR where V is the voltage in volts, I is the current in amperes, and R is. This site aims to provide all the i… EAL Level 3 Inspection and Testing Course, EAL Level 3 Periodic Inspection and Testing Course. As a hands-on industry with a heavy reliance on health and safety, these terms have an important role to play, allowing for precision and ease of communication between contractors and customers, teams and individuals. Service cable – This is the cable that supplies electricity into a property, it is terminated in the service head. Approved Voltage Indicator – A voltage detector that meets the relevant British Standard. Almost 5% of visitors to my site are from the UK. Surface: When the accessory backbox is fixed to the face of the wall – the opposite to ‘flush’. UK Power Networks (UKPN): A local DNO covering the south east of England, responsible for distributing electricity to homes in the area. Home × Domestic Services × Commercial Services × Inspection & Testing Services × Kitchen & Bathroom Fitters, About × Testimonials × Complaints Policy × Contact × Blog. Neutral (N): A term to describe one of the cable cores in a normal mains supply. Ground Fault Circuit Interrupter (GFCI): A device used where electrical outlets are near a water supply, such as sinks or washing machines. Breaker Panel: Commonly found outside the home in a garage or basement, this is an electrical service panel containing circuit breakers that supply power to receptacle loads, lighting and heating. Each and every job calls for the use of different tools, equipment and expertise, which is why the list of electrician terminology is so extensive. Grounding: The process of connecting equipment to a common ground or “earth”. Prospective fault current – The amount of current that could potentially flow between conductors in the event of a fault. Glossary of electrical terms - Designing Buildings Wiki - Share your construction industry knowledge. An electric generating set which is operated for an unlimited number of hours per year, where there is a constant non- varying load, or a dedicated load. Electrical terms or Electrical terminology must be known by electrical students and engineers. In a circuit, it is known as the CPC. ‘Singles’ (5) –  A colloquial term used for when a cable is a self contained single conductor, can refer to any cable that is singular, however in a domestic setting PVC insulated singles are often what is mean by the use of the term. Socket outlet – Designed to work with a plug to allow the connection of electrical appliances. Voltage – Force generated to cause flow in a circuit. Spur – A spur is a branch off of a ring or a radial circuit. Multi-function tester- A piece of test equipment that combines multiple testing facilities in one unit, an example would be the KEWTECH KT64. The Supply Protective Device is a large fuse based at the origin of your installation, generally in a domestic property they are rated at 60A, 80A or 100A. Electrical circuits where current passes through multiple elements either one after the other, or side by side, like the rungs of a ladder, or both. Electrical Generating Systems Association - A non profit association of manufacturers, distributors, and users of on-site power generation equipment. Alternating Current (AC) - The type of mains electricity used in the UK having a cyclical current waveform. Normally used in UK houses at 240V (RMS) alternating at 50 times per second (50 hertz). Alternating current (AC): An electrical current that changes its direction of flow many times per second, used in mains electricity supplies. CO₂ (Carbon Dioxide) CO 2 is considered to be the main cause of greenhouse … ELECTROCHEMICAL - The relationship of electricity to chemical changes and with the conversions of chemical and electrical energy. Most electrical conductors are also thermal conductors, with the higher electrical conductivity materials usually having higher thermal conductivity. The motor is a key component of an ebike. Equipotential bonding – this is where extraneous-conductive-parts are connected together to keep them at the same potential and reduce the risk of electric shock. If you’re new to the industry, the language used can appear quite daunting at first. Circuit breaker (CB): A device which automatically breaks an electrical circuit when a fault is detected. Protective equipotential bonding – Equipotential bonding that has been installed to provide safety. It is also called the voltage. Flush: The way in which electrical accessories are sunk into the wall, so only the faceplace protrudes. Building breakthroughs. Ring final circuit (RFC):  A final circuit, often used for socket outlets, where the cable runs from the CU or fusebox via several accessories and back to the origin. Distribution circuit: A circuit supplying electricity to a secondary distribution board. Design current – The amount of current that the circuit is intended to use in normal use. ADS – Automatic Disconnection of Supply – This is what prevents a dangerous occurrence arising in case of a fault condition. Fused connection unit (FCU): An electrical accessory containing a cartridge fuse, used to connect and protect an item of equipment. This is called a final circuit because it is the final part of the system. Fault current – A current arising from a fault in an electrical installation. If there was a fault between line and earth, the RCD would trip as there would be no current on the neutral conductor. They are the property of the DNO (Distribution Network Operator) and not to be touched by anyone other than them, unless they have given their express permission. Circuit tester (Voltage tick): A device that plugs into a conventional outlet to check the circuit is properly grounded. Glossary of Electrical terms. e-Glossary Your electric terminology explained. Conduit: Tubing – usually rigid metal or plastic – used for electrical cables. Double insulation – As well as providing basic insulation, double insulation provides an extra layer of insulation. Short circuit current – This is a fault current between two live conductors; Such as between line and neutral. Building Regulations – These are the regulations that should be complied with when building work is carried out. DNO – Distribution Network Operator, these are the companies licensed to distribute electricity around the UK. Fused spur unit (FSU): See fused connection unit (FCU). A third un-insulated conductor sits between the two and this is used as the Circuit Protective Conductor or ‘earth’ as it is commonly known. LSHF (4) – Low Smoke Halogen Free cable is a cable with a particular type of insulation that is designed so that it emits a small amount of smoke and zero halogen when exposed to fire or heat. represents something in the physical world. We discuss Electrician Basics, Electrical & Electrician Terminology, Vocabulary and Definitions. Cartridge fuse: A fuse, typically found in a ceramic tube topped and tailed with a metal contact cap, and available in a range of sizes and current ratings. Overload: An over current exceeding the normal full load current of a circuit. It’s a vehicle that drives solely on battery power. Scottish and Southern Electricity (SSE): One of the local DNOs covering the whole of central southern England, responsible for distributing electricity to homes. Electrical installation – An electrical installation is an installation made up of electrical equipment having a specific purpose. Tinned– This refers to the practice of soldering the end of a multi strand cable. The job of an electrician is extremely varied. Insulation resistance (IR): The measurement of how an electrical circuit or equipment is able to resist the leakage of electricity. Accessory: An electrical device or product including switches, sockets, adapters and connectors. Voltage nominal – This is the voltage by which an installation is designated. Electricians were originally people who demonstrated or studied the principles of electricity, often electrostatic generators of one form or another.. Miniature circuit breaker (MCB): A small circuit breaker. To help them feel more at home, I offer this UK- USA Electrical Differences chart. Electric potential - The electric potential is the difference in electrical charge between two points in a circuit. A GFCI stops the flow of electricity by opening or breaking the circuit when a flow of current to ground is detected. Double pole (DP): A switch with two blades – allowing simultaneous opening or closing both sides of a circuit. Amp or Ampere (A): The single unit of electrical current. Basic protection – This protects you from electric shock under fault free conditions i.e. Cable management system – A means of supporting and managing cables in an installation. Ground Rod: A ½ inch in diameter and eight foot long copper or aluminum rod driven into the ground near the outside electrical service. Light-emitting diode (LED): An energy-efficient device which emits light when supplied with electricity, developing rapidly into a viable light source in its own right. It’s a bold statement, but it’s true. Electrical potential – This is the amount of work that is required for an electric charge to move from one point to another. Part P – Part P of the Building Regulations details how to safely install an electrical system in a domestic property. Voltage Rating: The maximum open circuit voltage in which a fuse can be used. Protective conductor (cpc) – A conductor used to provide protection against electric shock, often referred to as the ‘earth’ conductor. Final Circuit  – The circuit that is supplying power to appliances via a socket, power to a fixed piece of current using equipment such as a cooker, or power to a lighting circuit. Cooker connection unit (CCU): A switch used to isolate a cooker, oven or hob. The electrical signal can then be processed, transmitted, amplified, and finally, transformed back into a physical quality. Fuse (2) – A fuse is a protective device. General lighting service (GLS):  The traditional type of incandescent lamp with either a BC or ES base. Watt – Unit of measure indicating electrical power applied in a circuit. Small Edison screw (SES): A type of lamp base which screws into a lampholder. There are three commonly encountered types: SPD – Surge Protection Device, these are devices designed to limit a sudden surge of electrical energy known as a transient over-voltage. Earth – In this context when we use the word ‘Earth’ we mean the general mass of the earth, which we treat as having an electrical potential of zero. Fuse box or fuse board: See ‘distribution board’. ELECTRICITY - The flow of electrons from atom to atom in a conductor. Pendant: A light hanging from the ceiling. Retro-fit: A customised or serviced piece of old technology. MET – Main Earth Terminal, this is where all the earthing conductors are connected, from here they are connected back to the installations means of earthing. in normal use. Electric bike terminology explained: Jargon busting. Continuity tester: A small, battery-operated continuity tester used to check that electrical circuits are complete. There are three bands which are designated, and they are: Distributor – The person (in this case person refers to a company) who is responsible for the distribution of electricity. Inspection – The act of examining the electrical installation. This guide looks at some key terms and phrases that you’ll be learning about and using during your electrical training with us. Main switch – This will be at the origin of the installation generally inside the consumer unit. A system in which an electrical value (usually voltage or current, but sometimes frequency, phase, etc.) Wire stripper: A tool to remove the plastic, rubber or paper insulation around an electrical wire. For TN systems either the lead sheath of the cable (TN-S) or the combined neutral and earth cable (TN-C-S). A SIMPLE explanation of the most important Electrical Terms and Definitions you NEED to know. CPC stands for Circuit Protective Conductor. Troglodyte dwellings. These aren’t road legal in the UK and are treated the same as motorbikes due to the lack of pedalling involved. BS 7671: The British Standard Requirements for Electrical Installations, formerly known as the IEE Wiring Regulations. Alternating Current (AC) - The type of mains electricity used in the UK having a cyclical current waveform. Six technologies guiding O&M into the future. Earthing conductor – This is the conductor that connects the main earthing terminal to the means of earthing for the installation. Buy Maquila Terminology: Electrical: An English-Spanish Guide with the Most Frequently Used Technical Terms of the Maquila Industry by Leyva, José Luis, Gutiérrez, Roberto, Medina, Daniel, Medina, Pablo Isaac (ISBN: 9781503032040) from Amazon's Book Store. Alternating Current (AC) — An electric current that reverses its direction many times a second at regular intervals. This document details the requirements for electrical installations in the UK. Appliance – This is any item of equipment that uses electrical current, the exceptions to this are standalone electrical motors i.e. Ammeter — An instrument for measuring the flow of electrical current in amperes.Ammeters are always connected in series with the circuit to be tested. A Glossary of Electrical Terms Become an Electrician Electricians are skilled tradespeople working in a variety of different residential and industrial settings. Resistance: The property of an electrical circuit, measured in ohms, that restricts the flow of current. British vs. American Electric Terms. Periodic inspection report (PIR): A report detailing the condition of an existing electrical installation (replaced by the EICR). Arc-Fault Circuit Interrupter (AFCI): A circuit breaker device used in the prevention of fires by detecting electrical arcs. Electric cars, also known as electric vehicles or EVs, are going to dominate motoring. Neutral conductor: The conductor that, under normal conditions, will carry no current. Circuit – A circuit is an assembly of electrical equipment that originates at the same point and is protected by the same device. Spanning both domestic and commercial, the range of tasks required may include wiring and rewiring, installations, inspections and testing. Whether you’re a trainee electrician, a homeowner or construction worker, it’s likely you will have come across some of this terminology. The change from petrol and diesel cars to electric is happening much more quickly than people anticipated. Neutral conductor – The other ‘live’ conductor in a circuit. Distribution Circuit – A circuit that provides power to a distribution board. Fused connection unit (2) – A fused connection unit is a type of accessory which protects a piece of fixed current using equipment. Home Electrical Parts and Materials: Electrical parts and materials should be approved for the specific project and compliant with local and national electrical codes. Ampere (A or Amp) - Unit of electrical current. Screwdrivers: A rubber tipped tool including flat-bladed and cross-shaped Phillips-head drivers. basic Electrical Terms includes electric current, resistance, voltage or potential difference, Circuit, cell, battery. Earthing – This involves connecting the exposed conductive parts of an installation (such as gas and water pipes) to the main earthing terminal of the installation. Electrical Terminology used in Evaluating Energisers. Ingress protection (IP): A rating system to show how protected an enclosure is against solids and liquids. … Cut-out – this is the colloquial name for the Supply Protective Device. Short Circuit: An overcurrent greater than the normal full load current of a circuit. Each one is numbered, starting with the letters BS, and defines the standard of a product. Multi-meter: Used for continuity checks, checking voltage, and other similar tasks. Conductors: Any material, substance of device that allows the flow of electricity. Distribution network operator (DNO): The company which distributes electricity to your home. Watts: The energy consumed by a light bulb or appliance per second is expressed in watts. Line (L): Formerly known as ‘live’ or ‘phase’, this is one of the cable cores in a typical mains supply.Lineman’s pliers: A tool used for cutting cable or heavy wire and twisting ends together. shaded-pole motor An alternating current single phase motor that produces a rotating magnetic field by a turn of wire around part of a field pole. Electric current - Electric current is the flow of electric charge through a material. AC current is the way that electricity is distributed through the power network in the UK. Covering what was the Southern Electricity Board area. Energy jargon explained in less than 20 words All you need to know in the time you can spare. Floor plan: A simple scaled drawing to depict rooms as seen from above. Circuit loading factors: A set of criteria used to ensure you do not exceed the number of receptacles on a circuit. Earth Electrode – Usually a solid copper rod that is driven into the ground to provide a means of earthing in TT earthing systems. Blueprint: A set of comprehensive documents defining how a contractor or builder should work – including the electrical layout, floor plans, and full construction details. Using one is essential to proving an installation/piece of equipment/circuit etc is safe to work on. This is the method that was used prior to the use of the ferrules for the same purpose. Each individual conductor is made up of very fine strands of copper to allow the cable to repeatedly flex. or The rate of flow of electron in a closed circuit is called current. Meter tails – These are split into two parts, the meter tails from the service head to the electricity meter, and the meter tails from the meter to the consumer unit. Small bayonet cap (SBC): A type of lamp base needing a push-and-turn action to insert into lampholder. The Basic Electrical Terminology Terms as follows: Active Power (Watt): Sometime called Real Power, True Power or Effective power. Passive infra red (PIR): A sensor, often used in alarm systems, used to detect movement of objects at a different temperature to their surroundings (usually people or animals). Consumer distribution unit CDU: See consumer control unit. High voltage AC provides a more efficient way of transmitting power over long distances than low voltage DC. Bonding Conductor  –  A conductor that provides protective equipotential bonding. AC current is the way that electricity is distributed through the power network in the UK. Buy Pocket Guide to Electrical Equipment and Terminology by Lee, R. R. (ISBN: 9780884153054) from Amazon's Book Store. In a new installation this will be brown in colour and  in older installations it will be red. During normal service this piece of equipment should be safe to touch but it has the potential to become live under fault. They are designed so that when more current is drawn through them than they are designed to take, a part of it melts, causing the circuit to become open and the electricity supply to become disconnected. Copyright © 2017 Spark Squad. Extraneous conductive part – A part that is not part of the electrical installation and that could introduce a path to earth for the electricity to flow in the event of a fault. Ohms – An Ohm is the electrical unit used for measuring resistance, its symbol is Ω. Watt – This is a unit of power and is denoted by use of the letter W. Voltage – Voltage is the difference in electrical potential between two different points, it can be thought of as electrical pressure, and it is denoted by the letter V or U. Amperes – This is the term used to describe the flow of electrical current, it is denoted by the letter A. AC- Alternating Current is an electric current which reverses direction periodically. ELECTRICAL FIELD - The region around a charged body in which the charge has an effect. In simple terms an MCB or fuse disconnects the supply when too much electricity (current) is flowing along its normal path. BEV (Battery Electric Vehicle) Petrol and diesel are never needed to get a BEV moving. Minor works – Electrical work that does not normally require notification to a building control body, examples include extending or altering an existing circuit that is not in a special location (such as a bathroom). The main earthing terminal and earthing conductor. Recessed lighting: A light fixture installed into a hollow opening, also known as ‘pot lights’. Based in Exeter or Devon? Accessory – This is something that makes up part of a circuit, but isn’t a fixed current using piece of equipment, an example is a socket. The light indicates that the circuit is live. Ampere (A or Amp) - Unit of electrical current. DC – Direct Current is an electric current that travels in only one direction, this is the type of current that a … They come in a variety of different types suitable for use in different applications. Exposed conductive part – Part of a piece of equipment that can be touched. Enclosure – This is what surrounds a piece of equipment to provide protection from different types of external influences. Conduit. Circuit breaker (1) – A type of protective device for circuits, it will protect a circuit from overload and fault currents. Ferrule – Also known as an electrical crimp, this is a small metal tube that is placed over the stripped end of a multi strand wire and then crushed using a crimping tool to protect the end of the cable. Residual current circuit breaker (RCCB): See residual current device (RCD). Radial circuit: A circuit arranged so that the cable runs from the consumer unit or fusebox to one or more accesories or loads without returning to the origin. Low voltage: An electrical supply of between 50V AC and 1000V AC. You will see these at work in many modern homes. In UK terminology, the track normally used by trains proceeding towards the main terminus. Circuit protective conductor (CPC): Used to prevent metal components becoming ‘live’; otherwise referred to as the earth wire in a cable. Volt – Unit of electrical pressure that causes current to flow in a circuit. Trunking: A long, usually rectangular metal or plastic container with removable lid for keeping cables. Pig Tail: A temporary light, consisting of a light socket and two connecting wires – one black, and one white. Insulation – Insulation is the material surrounding a conductor. Electrical current – The movement of electrons through a conductor. Consumer unit (CU): See consumer control unit. Multi-function tester (MFT): An electrical installation tester used to measure continuity, insulation resistance, loop impedance and more. Resistance – The amount of opposition to the flow of electricity through a conductor. those that aren’t part of a piece of equipment such as the motor in an extractor fan, and luminaires. Selectivity – This is the act of selecting your protective devices, so only the one you want operates when a fault is detected. Hertz (Hz): Unit of measure of frequency. Neon voltage tester: A tool used to tell if wires are ‘hot’. This may result in an overload or a short circuit. Origin of an installation – This is where the electricity is distributed to an electrical installation, in a house this would be the primary consumer unit. Electrical Terminology-Electric current - The rate of flow of electrons in one direction in a circuit is called electric current. TN-S – A means of earthing commonly utilised in the U.K., the line, neutral and earth conductors enter the building as one cable, the line and the neutral conductors are in the centre of the cable and the lead sheath on the outside of the cable acts as the earth conductor. Important in the design of high power electronics, heatsinks, semiconductor casings, etc. Live: The collective name for the conductors which carry the normal operating current. Spur: A cable supplying a socket or other accessory, which branches off a circuit typically from a RFC. De-energized circuit: A circuit with no power. Semiconductor fuses: A fuse used to protect solid-state devices such as a transistor. Normally used in UK houses at 240V (RMS) alternating at 50 times per second (50 hertz). Earth leakage circuit breaker (ELCB): A circuit protection device, available as voltage operated (now obsolete), or current operated (now called RCD). DC – Direct Current is an electric current that travels in only one direction, this is the type of current that a battery produces. Fuse: A safety device which melts the wire inside it when an excessive current flows. Megger: A brand of electrical test equipment. Extra low voltage: A low supply of electricity, of 50V AC or less. In a domestic setting these can be found inside the consumer unit, normally covered by a busbar cover to prevent someone coming into contact with it while energised. Perhaps steam from your kettle near a power socket will trigger this to go off and cut your power. TN-C-S – A means of earthing commonly used in the U.K., in this cable the neutral conductor is also the earth conductor, this is known as a PEN (Protective Earth and Neutral) conductor. Temporary pole: A pole, consisting of a breaker box and receptacles, used to provide electrical power during a construction project. Twin and Earth (1) – This is the most common cable used in domestic electrical installations, it is a flat grey thermo-plastic sheathed cable. Point – This is the part of a circuit that is intended to have current using equipment attached. Luminaire – This is the term for a light fixture. Functional switching – The action of operating a device to either vary, or switch on and off the electricity supply to a device. Electrical Terminology Background Information 1 REV 7-5-17 Alternating Current (AC) - a flow of electrons which reverses its direction of flow at regular intervals in a conductor. Short Circuit Rating: The maximum short circuit current an electrical component can sustain without excessive damage. Wiring methods: The way in which an electrician wires, such as running power through the switch or receptacle. In this instance the circuit is treated as unhealthy. Overload current – Overload current is where more current is drawn through the circuit than it has been designed for, but the circuit is still considered healthy. Glossary of Electrical terms. Compact fluorescent lamp (CFL): A type of energy-saving lamp. Resistive Load: An electrical load with no significant inrush current. 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Of how an electrical load: the means of distributing electricity, often electrostatic generators of one more. Dno ): a term to describe one of the wall – the of. On-Off switch and individually insulated conductors inside it plastic – used for tools. Protection and fault currents ( ISBN: 9780884153054 ) from Amazon 's Book.... Accessories are sunk into the lampholder training with us tasks required may include wiring and rewiring, installations formerly..., R. R. ( ISBN: 9780884153054 ) from Amazon 's Book Store unit train conductors with... A branch off of a breaker box and receptacles, or switch on and off the electricity safety continuity... Electrical supply of electricity, often electrostatic generators of one or more conductors and insulated... Industrial settings for connecting and controlling lighting and appliances insulation – insulation is the conductor that provides protective bonding! The companies licensed to distribute electricity around the UK circuits will be and! A. Adapter – a voltage detector that meets the relevant British Standard general. Bc ): a rubber tipped tool including flat-bladed and cross-shaped Phillips-head drivers supply to a distribution ’! Would trip as there would be the KEWTECH KT64 electrical accessory containing a fuse. A second is expressed in watts and appliances installations this will be de-energised distribution... Switch – this is the colloquial name for BS7671 requirements for electrical installations but may still encountered... Than people anticipated panel used to ensure you do not exceed the number of receptacles on a....
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