![]() So, what’s the explanation for this? You see, for a 220v load, only two hotwires are required for it to function. This is why, in most cases, a 3-wire will suffice. For 220v power loads, it’s important to note that a neutral wire isn’t required. Now in this article, we’re mainly comparing the two for 220v power loads. This will better equip you with the technical knowledge required to make a decision. This segment mainly covers the suitability of these wire configurations. Users report cold air is blowing from electric heaters, but that’s never a wiring problem. Electric heaters use the 4-wire settings. But as you progress further, you’ll learn which configuration is more applicable where. Some people deem this configuration as more effective and ideal in all regards. So the ground wire has only one function, that is to prevent circuit breaker short. What’s interesting is that in this case, neutral wire carries the current back to the source. This configuration also has 2 hotwires in red and black, and a ground wire.īut, it also comes with a white wire. As it is a ground wire, it prevents the circuit breaker from shorting.ĭifferent from the 3-wire setting, this configuration offers an extra wire. It works as a ground wire and also a route for returning current. In other words, the red and black wires are mainly responsible for conducting the current.Īs for the bare conductor, it has two functions. These insulated wires will be in red and black colors. Speaking of 3-wire, you may be interested in wiring a 3-wire plug with 3 wires. When assessing the 3 wire settings, you’ll notice two insulated wires and one bare copper wire. ![]() But do these wires all play the same role? The answer is no. The number of wires is in the name itself. ![]() In order to understand that, let us first look at the different compositions of the two. The appliances these configurations use and compatibility may differ. 3-wire vs 4-wire: A Head-to-Head Analysis I hope this gives an initial informed idea about the differences between the two. Used with Appliance using Multiple Circuits This will shed light on their structural differences at a glance: FactorsĢ Hotwires, 1 Ground Wire, 1 Neutral Wire In order to have a quick understanding, take a look at the table below. They have clearly outdone the days of 2 wire configurations due to efficacy. The 3 wire and 4 wire configurations are being widely used across the world. EndNote Comparing the 3-wire and 4-wire: At a Glance
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