Asked in Physics
What is the function of the third prong on the plug of an electric appliance?
Asked in Physics
What is the function of the third prong in a household electric plug?
Asked in Physics
What is the function of a third prong on a plug?
That is a grounding pin. It provides a easy path for electricity to go to ground (all electricity seeks "ground" and will take the easiest path) By having the grounding pin it there it will hopefully prevent the easiest path to ground from being through YOU. Which would cause you you to get shocked. The third prong connects the body of the appliance directly to ground.
Is it essential to have a 3 prong cord on a heater?
most likely a big fork LOL ========================== The third prong is for your protection. The appliance will operate just fine without it, assuming there aren't any wiring faults within the appliance. The third wire, the ground wire, assures the breaker or fuse trips if there is a fault that occurs internally. Metal parts within or on the outside of the heater that are not intended to carry the electric current, if they become energized for any reason, can be dangerous and deadly without a properly connected ground.
What if the top pin on three pin plug broken in electric socket. Is it dangerous?
Not in itself. Do not plug another three prong plug in the outlet until the broken prong (round-ish) is removed from the outlet. The third prong (round-ish) on a three prong plug is the ground. It does not carry any power. Correction "It's the power return" <- This is not exactly true. The third prong is an earth ground. It is in place to eliminate a physical short at the appliance end from energizing metal surfaces on the appliance. In relation to the hot lead (the smaller slot) it will complete the circuit and is dangerous only in relation to the hot source slot. On an empty outlet, the slots should NOT HAVE ANYTHING in them. If you're careful, you can use a set of small pliers to remove the broken prong. Do not work in either of the two slots of the outlet. One of the slots is hot (powered).
Asked in Electrical Engineering
Does the third prong on an electrical plug provide extra current during a power surge?
No, the third prong is a grounding prong, and provides a path to earth ground, should there be a fault in the wiring. Typically the ground prong will be wired to the metal chassis of an appliance. So if something happens causing the chassis to become energized from the 'hot' wire, the extra current due to the short circuit should trip the circuit breaker and interrupt the current, rather than leaving it 'hot' and presenting a potential shock hazard.
What does the third prong ion a three prong pulg do?
Why is it important to have a three-prong plug for an appliance?
A three-prong plug on an ordinary appliance contains a third conductor connecting the metal parts of the appliance to a safety grounding wire in the receptacle. In the event the line voltage wires become disconnected inside and touch the metal parts, the safety grounding wire will provide a short-circuit for the hot (blowing the breaker) and provide an alternative path to ground (for the open neutral), avoiding instant electrocution of a person touching the defective unit.
Is a grounding 120 volt receptacle larger than an ordinary receptacle?
Asked in Consumer Electronics
Why do cords have 3 prongs?
Two prongs are needed for any electrical connector. This is because electricity is like a drive belt, where each component passes the belt through itself. Or electricity is like water inside pipes, with all the pipes full, and no bubbles allowed. Each component has to have an "in" and an "out" pipe. The third prong is there to prevent accidental electrocution and to prevent electrical fires. It's connected to one of the other two prongs. Wires inside the walls are run through steel pipes, and the third prong is connected connected to the steel. It's also connected to a metal stake driven into the earth. The third prong helps disconnect a malfunctioning appliance. In some appliances the third prong is connected to the metal case of the appliance and to the iron parts inside the motors. Suppose the plastic coating on the other two wires becomes damaged. If the wires touch any other metal in the appliance, they'll blow the fuses or trip the circuit breakers. Or in other words, a damaged and hazardous appliance will switch itself off automatically. Also see: http://amasci.com/amateur/whygnd.html
Why do electrical plugs have at least 2 prongs?
What is three pin plug?
Usually referred to as a 3-prong plug if we are talking about a normal home electrical issue. It is a "male plug" which fits into a "female receptacle". It has one rounded prong (Earth ground) and two spade like prongs which are "Hot" and "Neutral". The orientation of the third grounding prong insures that the Hot and Neutral are corrected properly to your appliance. This is most important when the appliance has a metal outside to reduce shock hazard. In typical installations Black wire is connected to Hot, White to Neutral and Green to Ground. Neutral and Ground are bonded together at your electric box so at any outlet the resistance (as measured by an Ohm Meter) would be quite low. -------------------------------------------------------------------------------------------------------------- A three-pin plug contains of neutral plug(left),live plug(right)and earth plug(up).The live wireis usually in the color of brown while earth wire is in the colour of green and yellow,and neutral wire is in the colour of blue.Live plug is connected with the elctrical supply.The live wire carries a voltage which drives an electric current through the electric appliance.The neutral wire offers a re-turn way for electric wire while the earth wire is a safety deivce.It protects us from electric shock in case an electric appliance is faulty.
Asked in Home Electricity, New Electrical Work, Modification of Old Electrical Work, Home Appliances
Is it safe to plug in three prong appliances into a three prong wall outlet that has no ground to it?
The NEC allows connection of ungrounded, 3-prong outlets if there is a properly installed GFCI "upstream" of the ungrounded outlet. As long as everything is working as designed, nothing will happen, but that third connector is a safety feature to protect you. It is connected to the frame of the appliance and if there is an internal short, leads the electricity back to ground. Without that connection, the operator may become the ground, i.e., crispy critter. No, it is not safe. Ground is a safety line, without it the appliance is not safe. It may work, and you probably will not be harmed, but it is not safe.
Asked in Home Electricity
Why an electric appliance must be used in 3 pin plugs?
Why are the third prong and ground wire necessary for electrical appliances?
Asked in Technology
How do you replace an old 2 prong plug with an updated 3 prong plug?
You don't. A 2 prong plug has two wires, one called live (black or red wire in the US) and the other is neutral (white or gray wire in the US). A 3 prong plug needs a third wire for ground (bare copper, green, or green-yellow in the US). The only time you can replace a 2 prong plug with a 3 prong plug is if the 2 prong plug incorrectly replaced an original 3 prong plug.
Is it safe to plug a three prong plug into a two slot extension cord?
Asked in Electronics
What is the most popular kitchen electronic among Americans?
How would you identify if an Electrical Appliance had a grounding Wire?
If you have a brand new appliance (hair dryer, toaster, fridge, tv etc) and it comes with a plug with three prongs it has a ground. If it comes with two prongs it is not grounded. The only time an electical appliance should not have three prongs is if it is "double insulated" double insulated means that the electrical components are on a chaisis that is electrically isolated from the outer case or chasis where the user can touch. This is done to greatly reduce the risk of electrical shock. If the device is not double insulated there must be a third prong or ground prong on the plug. The device will have a ground wire attached to the conducting parts of the device so that if there should be a failure such as a broken wire touching the parts that can be touched the electricity will have a path for electrical flow and again greatly reduce the risk of electrical shock to the user. If you plug in a three prong or grounded appliance and for some reason the breaker instantly trips there might be a dangerous electrical problem with the appliance which is causing electrical flow back through the ground conductor. this would also be slangly called a "shorted" circuit. It almost always causes the breaker or fuse to trip/blow.