Bs 546 is also the precursor of current indian and south african plug standards. In our home appliances we are having some are two pin plugs and some are three pin plugs. It is important to know how to wire a 3pin plug correctly. Here e is for earth pin, n for neutral wire pin and l for live wire pin. If you dont have a earthground in your house and you want to earth your electrical system you will have to find out what electrical system is being used in your area, eg combined neutral and earth, or seperate, you may have to sink an earth electrode in. The earth pin is the last to disconnect from the socket when removing the plug from the socket. Should be a three pin plug, one at the top is an earth.
If your from the uk there should be a built in earth. This tester verifies that a switzerland type mains outlet socket is wired properly and grounded. Jan 18, 2015 electric plug there are three pins in a common electric plug. Nevertheless, it is still important to understand the correct wiring of a plug because enough of the old plugs still exist. May 20, 2017 the casing is slimmer than the old two pin garden connectors, yet still manages to include the earthing connections.
Bs 546 and related types type d and m bs 546, twopole and earthing pin plugs, socket outlets and socket outlet adaptors for ac 5060 hz circuits up to 250v describes four sizes of plug rated at 2 a, 5 a type d, 15 a type m and 30 a. I bought this adapter only for the sake of earthing. Oddly this power socket only exposes two ports for the wire to connect to. This ensures that the plug fits firmly into the socket, reducing the chances of sparking. Ive come across a 3 pin socket that has no switch on it dont know if thats significant, when i took it off i noticed there was a black wire inserted into. I have a portable power socket that accepts two 2 pin power plugs and 1 pin 3 pin grounded power plug. Since it is not uncommon for sockets of this type to be missing an earth connection, it is highly recommended that you test outlets with a socket tester. I am looking at putting metal plug sockets in and replacing the plastic ones. Give the role of each of the three terminals of a three way pin plug. The fit is tight but not too much and has met my requirements totally. Two of these are of the same size and the third one is bigger than the other two. This socket also works with plug c and with plug f if it has an additional pinhole.
In three pin socket normally three pin in between three pins earthing point is more thickness why answer rk hari the pin gives larger contact area with socket clips which is requard to handle falt corrent. Please note that though you can plug the 2pin european plugs into your wall socket, earthing is absent unless you use a connector like this one. It is important to know how to wire a 3 pin plug correctly. In an electrical installation, an earthing system uk or grounding system usa connects specific parts of that installation with the earths conductive surface for safety and functional purposes. So my first thought is to provide a ground return for the tv power. The plugs have three round pins arranged in a triangle, with the larger top pin being the earthing pin. Surprisingly, at least to me, the neutral and the earth are connected in the plug behind the plastic platform that holds the copper connectors. Type e is the plug which has two round pins and a hole for the socket s male earthing pin. Three pin plug by 20200424 0814 electrical white plug with three pin socket technology diagram image graphics for. To know the importance of this pin, it is important to know electrical grounding. Gcse sciencesafety in mains circuits wikibooks, open. They safeguard our lives, but we take them for granted. In three pin plug why the upper pin is bigger in size.
When we insert a 3pin plugin into a 3pin socket, the earth pin is the first to make a contact with the socket as compared to the live and neutral pins. Bs 546 twopole and earthingpin plug, socketoutlet for ac 5060 hz circuits up to 250v is also the precursor of current indian and south african plug standards. This product is very useful to work on computers or esd sensitive devices. The choice of earthing system can affect the safety and electromagnetic compatibility of the installation. Line and neutral disconnect first and then the earth pin. Buy mx 2 way 3 pin universal conversion plug online at low price in india on. Originally published in april 1934, it was updated by a 1950 edition which is still current, with eight amendments up to 1999. In her 1914 book electric cooking, heating, cleaning, etc.
When i first plugged in and checked, earthing wasnt working. All metal casing or metallic coverings containing or protecting any electric supply line or apparatus such as gi pipes and conduits enclosing vir or pvc cables, iron clad switches, iron clad distribution fuse boards etc should be earthed connected to earth. Tight connection when plugging in my toothbrush charger. If the live wire were to touch the case a huge current would flow through the earth wire. The choice of earthing system can affect the safety and electromagnetic compatibility of the power supply. Aug 03, 2012 for an earth connection, a three pin socket and plug are required. But earth puns inside the socket is not well aligned. Earthing system project gutenberg selfpublishing ebooks. Be sure to test every outlet you use, as often 3 pin sockets can be properly earthed in some rooms e. The grounding plug underneath an outlet is a perfect ground, and when you plug into it, it gives the device a perfect ground to use. But the earth pins are feeble and not upto the mark. Type c europlug dual pin plug and socket similar to both type e and type f, but the plug is flat and can fit into a number of sockets in europe. Earthing system wikimili, the best wikipedia reader. Earthing flat sheet 90 x 310cm 36 x 122 for 1 or 2 pers.
Threepin plugs and sockets of the roundpin type, as used in domestic premises, offices, etc. Why earth pin is thicker and bigger in a three pin plug. Extension lead 2x electrical socket to mains plug lead two way double gang 1m to 20m white black colour. This connection goes into the socket, then inside the wiring of your house down to the earth through the earthing system not necessarily plumbing. Ac power plugs and sockets yourstudent gemini wiki fandom.
In a tn earthing system, one of the points in the generator or transformer is connected with earth, usually the star point in a three phase system. Threepin plug definition and meaning collins english. Bs 546, twopole and earthing pin plugs, socket outlets and socket outlet adaptors for ac 5060 hz circuits up to 250v describes four sizes of plug rated at 2 a, 5 a type d, 15 a type m and 30 a. Why is the earth pin on a three pin plug made bigger than the. A threepin plug contains an earth, active and neutral pin. Ac power plugs and sockets are devices that allow electrically operated equipment to be connected to the primary alternating current ac power supply in a building.
Top pinhole of a socket and top pin of three pin plug i. Inside your walls is hundreds, even thousands of feet of electrical cable. But i bent the earth pin a bit to make sure that it was touching the power cord. Why in a three pin plug the earth pin is thicker and longer. If you dont have a earthground in your house and you want to earth your electrical system you will have to find out what electrical system is being used in your area, eg combined neutral and earth, or seperate, you may have to sink an earth electrode in the garden. If it is not earthed by conduit, and the screws holding the socket to the back box are going to at least one fixed lug ion that back box, and the holes for the screws are eyleted and metallically connected to the earth terminal on the socket face, this may mean that a link to the back box is not. This grounding sheet measures 90x200 cm with 2 extra folds of 55 cm. A grounding adapter comes with every order into a grounded wall socket.
Upper pin is big in size becuase it is connected with earthing its big size indicates that its a earthing point. Why earth pin longer and thicker than others live or neutral pin in a three pin plug. Ac power plugs and sockets connect electric equipment to the alternating current ac power. Microwave oven block diagram consumer electronics book. Statictek banana jack outlet plug adapter universal ground 3. The 16 a three pin earthed socket is designated cei 2350 p 17, there is not a 16 a two pin unearthed socket. The earth pin being thicker can never enter live or neutral sockets thus a given electric appliance gets connected only in one proper electrical position, where the live wire, neutral and earthings are connected correctly. The fast blow ceramic selection from consumer electronics book. The earth pin is longer because it is the first pin to make contact when all three pins earth, active and neutral are inserted into a socket. For an earth connection, a threepin socket and plug are required. Less resistance, touches the socket first and detaches last so that all stray current gets grounded to protect the equipment. Interchangeability, safety, materials, construction, dimensions.
Buy 3prong to 2prong adapter grounding converter 3 pin to 2 pin power ac ground lifter for wall outlets plugs, electrical, household, workshops, industrial, and appliances, color light gray, 6piece adapters free delivery possible on eligible purchases. Type e is the plug which has two round pins and a hole for the sockets male earthing pin. The plugs have three round pins arranged in a triangle, with an earthing pin. They are designed to ensure safe supply of electricity to electrical appliances. The cable of an earthing pin, if you decide to use this box instead of splitters to connect more than 1 grounding products. Socket testers, conductivity testers, earthing book, extension cords, splitters. Microwave oven block diagram the block diagram of a microwave oven is given in fig. The point of reference is the earths conductive surface.
Type e french dual pin plug or socket similar to type f however, socket has an earthing pin permanently mounted in the socket. Distribution box with alligator clip for up to 3 adapters. The earthed consumer plug has several claimants to its invention. But the earth pin is always longer and thicker than the other two pins, have you wondered why. Earthing means connecting any noncurrent carrying conductor part of an electrical system with general mass of earth in such a manner that there is an immediate discharge of electrical energy to the earth in the event of electrical potential developed at that part of the system. Each wire has its own specified color, as shown above and each pin must be correctly connected to the three wires in the electrical cable. Unusual and obsolete plugs and sockets project gutenberg. The built of the socket is really good except its earthing pins. Normally, three wires are there in an electrical cable used in our home and they have three different colors. The 3pin plugs are designed so that electricity can be supplied to electrical appliances safely.
Included in the assembly along with pins of both gender. Earth pin of 3 pin lighting plug sockets and 4 pin power plug should be efficiently and permanently earthed. In three pin socket normally three pin in between three pins. Three pins made of brass, one of which is the earth pin. The third pin is connected to the neutral earth wire. Type ai chinese three pin plug or socket similar to type g. The use of such an adapter avoids the need to replace receptacles. Gcse sciencesafety in mains circuits wikibooks, open books. Gcse sciencesafety in mains circuits wikibooks, open books for. Type ai chinese threepin plug or socket similar to type g.
On some sockets these shutters are operated by the earth pin pushing the shutter mechanism down to uncover the line and neutral socket contacts, on other sockets there is a mechanism which opens the shutters when the two live pins are inserted simultaneously, and on other sockets when all three pins are inserted simultaneously. Icse solutions for class 10 physics electric power and house hold circuits icse solutionsselina icse solutions provides icse solutions for class 10 physics chapter 8 electric power and house hold circuits for icse board examinations. To connect the metallic conductive parts of an electric appliance or installations to the earth ground is called earthing or grounding. Nowadays most appliances are sold with moulded plugs already fitted. The longer earth pin provides a return path before the live pin engages. The shock hazard occurs only with the 2 pin plug equipments like. Bs 546, twopole and earthingpin plugs, socketoutlets and socketoutlet adaptors for ac circuits up to 250 v is a british standard for three pin ac power plugs and sockets. A cheater plug, ac ground lifter or three prong to twoprong adapter is an adapter that allows a nema 515p groundingtype plug three prongs to connect to a nema 115r nongrounding receptacle two slots. The body of the electrical device is connected with earth via this earth connection at the transformer. The twopole and earthingpin socket is a british standard bs 546 for three pin ac power plugs and sockets. No earth wire in socket page 1 homes, gardens and diy. Selina solutions concise physics class 10 chapter 9 household circuits provides information relating to power distribution.
In our home appliances we are having some are two pinplugs and some are threepin plugs. Bs 546 and related types type d and m bs 546, twopole and earthingpin plugs, socketoutlets and socketoutlet adaptors for ac 5060 hz circuits up to 250v describes four sizes of plug rated at 2 a, 5 a type d, 15 a type m and 30 a. Selina solutions concise physics class 10 chapter 9 household. Our earthing socket testers will test the wiring configuration of any uk socket they are plugged into. Sep 18, 2017 why earth pin is thicker and bigger in a three pin plug. Each pin must be correctly connected to the three wires in the electrical cable. Bs 546, twopole and earthing pin plugs, socket outlets and socket outlet adaptors for ac 5060 hz circuits up to 250 v is a british standard for three pin ac power plugs and sockets.
Electrical plugs and sockets differ from one another in voltage and current rating, shape, size, and connector type. The casing is impressed with the following useful information, which cannot peel or rub off. Due to the high current it draws, the earth pin is made thicker and larger than the other two pins. The earth wire connects the case of the appliance out down the flex to the earth pin on its plug. They are designed to ensure a safe supply of electricity to electrical appliances. I get an electric shock whenever i connect my digital camera or camcorder to my tv. This adapter provides a perfect match between the points of a three pin socket and a two pin plug especially an european one. Jan 25, 2011 i get an electric shock whenever i connect my digital camera or camcorder to my tv. Home about hvac safety induction techno bangla post news bulletin engineering books electrical books hvac books religious books contact. Selina solutions concise physics class 10 chapter 9. Why is the earth pin on a three pin plug made bigger than. Currently, appliances are sold with nonrewireable cee 77 plugs attached. Bs 546, twopole and earthingpin plugs, socketoutlets and socketoutlet adaptors for ac 5060 hz circuits up to 250v describes four sizes of plug rated at 2, 5, 15 or 30 amperes. Increasing utilisation of electrically operated gse, primarily mains powered.
The 5 a version has been designated as type d and the 15 a as type m in the iec 60083 plugs and sockets standard. Electrical earthing, grounding, methods of earthing, types of earthing, components of earthing and its specifications in respect to electrical earthing for electrical installations. Illustration of tripin 3pin earthed plug dated 1911. Bs 546, twopole and earthingpin plugs, socketoutlets and socketoutlet adaptors for ac 5060 hz circuits up to 250v describes four sizes of plug rated at 2 a, 5 a type d, 15 a type m and 30 a. Major topics covered in household circuits are transmission of power from the generation station to the consumer, power distribution to. Earthing two pin sockets for those like me who may be unaware, i recently purchased a 3 gang 16a socket. Originally published in april 1934, it was updated by a 1950 edition which is still current, 1 with eight amendments up to 1999.
Different standard systems of plugs and sockets are used around the world. The 12meter extension cable if you need more length to the grounded wall socket. For electrical safety reasons the longer earth pin is the first pin to establish contact when all three pins earth, active and neutralare inserted into a socket. Ac power plugs and sockets connect electric equipment to the alternating current ac power supply in buildings and at other sites. While the national wiring regulations for buildings of many countries follow the iec 60364 terminology, in north america united states and canada, the term equipment grounding conductor refers to equipment grounds and ground wires on branch circuits, and grounding electrode conductor is used for conductors bonding an earth ground rod or similar to a service panel. In three pin socket normally three pin in between three. Icse solutions for class 10 physics electric power and. By about 1910 the first threepin earthed grounded plugs appeared. Ive come across a 3 pin socket that has no switch on it dont know if thats significant, when i took it off i. It has earthing clips on both sides to connect with the cee 74 socket and a female contact to accept the earthing pin of the cee 75 socket. The cartridge fuse protects the appliance when there is an electrical fault the earth wire protects the user from electric shocks in the event that an electrical fault causes the appliance to be live. If you see in any place around the world, you will find the same concept behind every three pin plug.
There is a hole on one side of this portable power socket where the wire goes into. In electricity supply systems, an earthing system or grounding system is circuitry which connects parts of the electric circuit with the ground, thus defining the electric potential of the conductors relative to the earths conductive surface. The mains plug and socket are threepin earthing type. If so should ican i run a earth from the connection on the back of the socket to the earthing point. A 3 pin plug consists of three pins hence the name. Ac power plugs and sockets british and related types. Electrical plugs and sockets differ in voltage and current rating, shape, size and type of. Oct 25, 2015 a 3 pin plug consists of three pins hence the name.
The 3 pin plugs are designed so that electricity can be supplied to electrical appliances safely. Bs 546, twopole and earthingpin plugs, socketoutlets and socketoutlet adaptors for ac 5060 hz circuits up to 250 v is a british standard for three pin ac power plugs and sockets. Mx conversion plug 3 pin indian to europe schuko socket. In an electrical installation, an earthing system uk or grounding system us connects specific parts of that installation with the earths conductive surface for safety and functional purposes. Mx conversion plug 3 pin indian to europe schuko socket adaptor 3518 3518, black. If you see in any place around the world, you will find the same concept behind every three pinplug. The grounding pin is used almost exclusively as a safety measure. We provide step by step solutions for icse physics class 10 solutions pdf.
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