In a standard switch/dimmer, the "hot" is using one of the two wires connected to the switch. What is the difference between the green ground wire and the white negative wire. In this case three wires will lead out from the transformer to each home electrical service connection. Hi Wayne, Unlike the neutral wire, the ground wire does not actually carry the electricity. The function of the neutral wire can only work when the ground system is provided at the main panel. Home electrical wiring projects with pictures and wiring diagrams. In this article, we will discuss the main function of Neutral Wire and the purpose of neutral wire in Electrical Circuit with a detail explanation. But, a reason I can think of for why you would be asking is you are looking at a switch that requires a neutral. The neutral wire should be connected to a white wire in the box. However, the neutral and ground wires serve two distinct purposes. Out of the three, it is the one that is most commonly misunderstood. Neutral lines are at zero potential relative to the ground, meaning that ideally, they do not pose a shock hazard (but good safety practice is always a good idea). In North America, there are a few different types of 240V loads; some need a neutral and some do not. Neutral wires should be white. Neutral wires have the important task of returning currents to the original power source; this is a necessary function of AC power, and we need to be able to identify these wires properly and make sure we use them for the … Please note, comments must be approved before they are published, Forgot your password? It's also possible to have some other colors may come into play depending on the system. But in the single phase domestic situation it does carry the current back to the supply and will show evidence of this if you measure it. Usually identified by its white color, it takes the unused electricity back to the transformer. It remains has power when the switch is in the On Mode. In Europe, there is a neutral connection in most countries, but the plug is designed so it can be swapped with the hot wire by simply rotating the plug. These electrical questions came from: John, in Lemon Grove California, and John in Sun City Center, Florida. The neutral wire allows the completion of the circuit and the switch to have power even when it's turned to the off position when you want the lights off. One of the wires' insulation MUST be marked with a color difference or the ribbing. so what is the purpose of a return, neutral wire? If the loads on the 3 phases are not balanced, the varying load on one phase does not cause large voltage changes on the other two phases. Therefore, the total neutral current is the vector sum of the three line currents.Under balanced conditions the vector sum is … We will send you an email to reset your password. I will develop more resources that cover this topic further because there is a great deal of confusion about Alternating Current, especially when discussing the topics of a 120 volt AC circuit, and alternating current which is produced by a multi-phase generator. So where is the neutral wire? Grounding wires are bare or have green insulation. also, if AC goes back and forth, does the neutral become hot/live and the hot/live become neutral on the second half of the cycle? The neutral wire in electronics is the wire in which electricity returns from the hot wire. The neutral prong is the wider of the two plugs. however, if i put an open switch on the neutral wire right after the radio, the radio will be full of power. This is how the circuit is ultimately completed or closed. This article looks at common 120 volt and 240 volt house wiring circuits and the circuit breakers that are installed identifying the types and amperage sizes used in most homes. This article looks at common 120 volt and 240 volt house wiring circuits and the circuit breakers that are installed identifying the types and amperage sizes used in most homes. There is no such thing as a 208V system in Europe, and the neutral wire is the part of the circuit at all times. Hi Taro, The service drop from the home to the power pole has three wires, however one is uninsulated because it is the ground conductor. But you do if you are grounded and then touch the white wire! Please correct me if I am wrong or let me know if this has been helpful. what does the neutral wire do in a plug (UK)? That means it connects to an electrical panel’s neutral bus bar. The neutral line refers to the part of the distribution grid that returns the power that left the transmission lines through a hot line or phase line to do work on an electrical load.
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