Glossary of Electrical terms. BEV (Battery Electric Vehicle) Petrol and diesel are never needed to get a BEV moving. Double pole (DP): A switch with two blades – allowing simultaneous opening or closing both sides of a circuit. e-Glossary Your electric terminology explained. Earthing conductor – This is the conductor that connects the main earthing terminal to the means of earthing for the installation. Fuse box or fuse board: See ‘distribution board’. Terminology. CPC stands for Circuit Protective Conductor. Distribution circuit: A circuit supplying electricity to a secondary distribution board. The standard unit for electric current is the ampere. 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. Extra low voltage: A low supply of electricity, of 50V AC or less. De-energized circuit: A circuit with no power. Line conductor – What a lot of people mistakenly refer to as the ‘live’ conductor. A Glossary of Electrical Terms Become an Electrician Electricians are skilled tradespeople working in a variety of different residential and industrial settings. Steel wire armoured (SWA): A cable, suitable for use outdoors and underground, with a layer of steel wire strands around the central conductors. or The current flowing in a circuit in a second is called a current. Six technologies guiding O&M into the future. Troglodyte dwellings. Multi-function tester- A piece of test equipment that combines multiple testing facilities in one unit, an example would be the KEWTECH KT64. 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. Floor plan: A simple scaled drawing to depict rooms as seen from above. Electrical terms or Electrical terminology must be known by electrical students and engineers. 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. Most electrical conductors are also thermal conductors, with the higher electrical conductivity materials usually having higher thermal conductivity. Electrical wiring in the United Kingdom is commonly understood to be an electrical installation for operation by end users within domestic, commercial, industrial, and other buildings, and also in special installations and locations, such as marinas or caravan parks. 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. Searching for an electrician? Normally used in UK houses at 240V (RMS) alternating at 50 times per second (50 hertz). Its purpose is to disconnect the supply of electricity to the installation. Fuse (2) – A fuse is a protective device. PEN conductor – Protective Earth and Neutral, this is one conductor that combines the functions of a neutral conductor and a protective conductor, the most commonly found example is in a TN-C-S earthing system. Ampere (A or Amp) - Unit of electrical current. The change from petrol and diesel cars to electric is happening much more quickly than people anticipated. Get in touch to request a free, no-obligation quotation today. During normal service this piece of equipment should be safe to touch but it has the potential to become live under fault. Fused spur unit (FSU): See fused connection unit (FCU). Neutral (N): A term to describe one of the cable cores in a normal mains supply. Electricians were originally people who demonstrated or studied the principles of electricity, often electrostatic generators of one form or another.. It is made up of basic protection and fault protection. The electrical signal can then be processed, transmitted, amplified, and finally, transformed back into a physical quality. 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. Alternating Current (AC) - The type of mains electricity used in the UK having a cyclical current waveform. This document details the requirements for electrical installations in the UK. Scottish and Southern Electricity (SSE): One of the local DNOs covering the whole of central southern England, responsible for distributing electricity to homes. Alternating current (AC): An electrical current that changes its direction of flow many times per second, used in mains electricity supplies. General lighting service (GLS):  The traditional type of incandescent lamp with either a BC or ES base. In UK terminology, the track normally used by trains proceeding towards the main terminus. Spanning both domestic and commercial, the range of tasks required may include wiring and rewiring, installations, inspections and testing. in normal use. 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. Neutral conductor: The conductor that, under normal conditions, will carry no current. 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. Overload: An over current exceeding the normal full load current of a circuit. or The rate of flow of electron in a closed circuit is called 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. basic Electrical Terms includes electric current, resistance, voltage or potential difference, Circuit, cell, battery. Cooker connection unit (CCU): A switch used to isolate a cooker, oven or hob. You will see these at work in many modern homes. BS – British Standard (General) A publication of the British Standards Institution (BSI). 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. This is the method that was used prior to the use of the ferrules for the same purpose. It does this by essentially monitoring the line and neutral currents. 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. Ampere (A or Amp) - Unit of electrical current. It is no longer allowed in new electrical installations but may still be encountered. Home × Domestic Services × Commercial Services × Inspection & Testing Services × Kitchen & Bathroom Fitters, About × Testimonials × Complaints Policy × Contact × Blog. 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. Understanding the Part P Electrical Regulations, Electrician Terminology and Slang – Know Your Lingo. represents something in the physical world. Electric bike terminology explained: Jargon busting. Ring Circuit– A circuit that has two sets of conductors leaving a distribution board from the same point essentially forming a ring, generally only used for socket circuits. BS 7671: The British Standard Requirements for Electrical Installations, formerly known as the IEE Wiring Regulations. Electrical Load: The part of an electrical system which actually uses energy or does the work needed. 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. Ohm: The unit of measure for electric resistance. Fused connection unit (FCU): An electrical accessory containing a cartridge fuse, used to connect and protect an item of equipment. It refers to the fact that a combination of methods of protection will disconnect the supply of electricity if a fault occurs. All rights reserved. This document details the requirements for electrical installations in the UK. Inspection – The act of examining the electrical installation. This site aims to provide all the i… 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. Amp or Ampere (A): The single unit of electrical current. Blueprint: A set of comprehensive documents defining how a contractor or builder should work – including the electrical layout, floor plans, and full construction details. Enclosure – This is what surrounds a piece of equipment to provide protection from different types of external influences. Point – This is the part of a circuit that is intended to have current using equipment attached. 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. When it is switched ‘off’ the consumer unit and all associated circuits will be de-energised. Electrical Panel: An insulated panel used to connect electrical wires to circuit breakers. A SIMPLE explanation of the most important Electrical Terms and Definitions you NEED to know. electric set (continuous power). 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. Prospective fault current – The amount of current that could potentially flow between conductors in the event of a fault. Switch Leg:  The wire connected to the on-off switch. They come in a variety of different types suitable for use in different applications. Cable management system – A means of supporting and managing cables in an installation. 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. Copyright © 2017 Spark Squad. Consumer control unit (CCU): A distribution board containing a main switch or main RCD, along with one or more circuit breakers, RCBOs or RCDs. Electrical Generating Systems Association - A non profit association of manufacturers, distributors, and users of on-site power generation equipment. Miniature circuit breaker (MCB): A small circuit breaker. Small bayonet cap (SBC): A type of lamp base needing a push-and-turn action to insert into lampholder. ELECTROCHEMICAL - The relationship of electricity to chemical changes and with the conversions of chemical and electrical energy. Here we have compiled a glossary of terms and definitions for reference purposes. Resistance – The amount of opposition to the flow of electricity through a conductor. In older installations this will be black and in newer installations this will be blue. Alternating Current (AC) — An electric current that reverses its direction many times a second at regular intervals. Insulation resistance (IR): The measurement of how an electrical circuit or equipment is able to resist the leakage of electricity. We discuss Electrician Basics, Electrical & Electrician Terminology, Vocabulary and Definitions. Low voltage: An electrical supply of between 50V AC and 1000V AC. Normally used in UK houses at 240V (RMS) alternating at 50 times per second (50 hertz). ‘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. Neon voltage tester: A tool used to tell if wires are ‘hot’. Two Gang: A type of electrical box which holds either two switches and two receptacles, or one switch and one receptacle. 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. Appliance – This is any item of equipment that uses electrical current, the exceptions to this are standalone electrical motors i.e. Everyday low prices and free delivery on eligible orders. Important in the design of high power electronics, heatsinks, semiconductor casings, etc. A GFCI stops the flow of electricity by opening or breaking the circuit when a flow of current to ground is detected. Over current: A condition when the normal load current is exceeded in a circuit. Inside, it has two single conductors of the same size that are both separately insulated, one is brown in colour denoting its intended use as the line conductor, and the other is blue, denoting its intended use as the neutral conductor. Circuit – A circuit is an assembly of electrical equipment that originates at the same point and is protected by the same device. Semiconductor fuses: A fuse used to protect solid-state devices such as a transistor. Circuit breaker (1) – A type of protective device for circuits, it will protect a circuit from overload and fault currents. Electric potential - The electric potential is the difference in electrical charge between two points in a circuit. Kingfield Electronics have been operating in contract electronics manufacturing and product management solutions since 1985, and have a wealth of knowledge in all aspects of the industry. Design current – The amount of current that the circuit is intended to use in normal use. DC – Direct Current is an electric current that travels in only one direction, this is the type of current that a … Within a country there will be some variation in electrical terminology, but between two that have the same language, the generally accepted lingo can be markedly different. For TT systems the earth electrode (not pictured), The path through the earthed neutral point of the substations transformer, The line conductor from the transformer winding back to the point of origin of the fault (not pictured). This is an electrical outlet which has its own internal breaker, which opens the circuit when there is a connection made between the power wire and return wire to prevent electrical shock. Service head – This is where the service cable is terminated and the cut out fuse located. Ingress protection (IP): A rating system to show how protected an enclosure is against solids and liquids. Conduit: Tubing – usually rigid metal or plastic – used for electrical cables. Ground Rod: A ½ inch in diameter and eight foot long copper or aluminum rod driven into the ground near the outside electrical service. Twin and Earth (1) – This is the most common cable used in domestic electrical installations, it is a flat grey thermo-plastic sheathed cable. Barrier (3) – Something to prevent contact with a live electrical part, for example a busbar cover within a Consumer unit. This will usually be at the same voltage as ‘earth’. Tinned– This refers to the practice of soldering the end of a multi strand cable. Electrical definition - Designing Buildings Wiki - Share your construction industry knowledge. 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. It describes the actual amount of power present in a system in watts (W) and the symbol is P. In a simple resistive circuit, the voltage and current are in phase and the active power is equal to the apparent power. Plug – A piece of equipment designed to fit inside a socket as means of connecting an appliance or piece of equipment. RCD: Residual Current Device, this is the generic name for a range of safety items that provide electric shock protection by detecting electrical current leaking out of a circuit. Megger: A brand of electrical test equipment. Electrical current – The movement of electrons through a conductor. Spur: A cable supplying a socket or other accessory, which branches off a circuit typically from a RFC. This guide looks at some key terms and phrases that you’ll be learning about and using during your electrical training with us. The motor is a key component of an ebike. Ohm’s Law: The equation V=IR where V is the voltage in volts, I is the current in amperes, and R is. Cut-out – this is the colloquial name for the Supply Protective Device. For TN systems either the lead sheath of the cable (TN-S) or the combined neutral and earth cable (TN-C-S). Local authority building control (LABC): The department which controls building standards, including electrical installation. Distribution Circuit – A circuit that provides power to a distribution board. Circuit: The means of distributing electricity, consisting of cable and accessories. 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. 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). In simple terms an MCB or fuse disconnects the supply when too much electricity (current) is flowing along its normal path. Proving Unit – A device which provides a known source of voltage on which an approved Voltage Detector is tested. Isolator – This is a device that is mechanically operated and is capable of isolating a particular circuit/piece of equipment as required. 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. Distribution board (DB): A piece of equipment used to connect circuits to an electricity supply. Part P – Part P of the Building Regulations details how to safely install an electrical system in a domestic property. 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. Circuit breaker (CB): A device which automatically breaks an electrical circuit when a fault is detected. This connects the incoming supply to the final circuits, and protects the the fixed wiring in the building while providing a point of isolation. 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