Lost Neutral / Function of Neutral on 240vac Circuits with DEMO's

hey guys Davey is gonna be a little bit different than the videos I've been making ain't done a electrical videos for a while so I thought it would be a time to do something electrical related in this video serving two purposes first of all it's explaining the purpose of the neutral conductor on a 220 circuit it's also explained this signs and symptoms of a lost neutral on 220 circuits the green wires serving as the neutral or ground and you got one leg of the 220 here and one leg here represented by the black and the red wires and the way 220 works is it's actually two 120 circuits split but out of phases each other and before I go any further as you've seen on the first thing when you're fitting the intro of the video you don't want to do this yourself because I'm just going to demonstration it's easy to get shocked and hand or electrocuted doing this this is just for demonstration purposes now if you look at the voltmeter I got to sit on a seat fire if you read from here to here getting 120 and from here to here I'm getting 120 and you go across the red in the black you pick up to 40 everybody calls it to Claudia it's actually 240 but so you get to 120 circuits adding together to get 240 but you never have 240 volts to ground so you can stick this in the ground and you're not going to pick up to 40 you only won't get 120 volts to ground you only get 240 across the two phases like this okay so now I've got a basic circuit setup here with 200 watt 120 volt light bulbs these are your standard incandescent bulbs and I'm just using these because they put more of a load on the circuit you're looking at approximately 0.8 amps per bulb on this okay so now there ain't nothing special going on you get 120 volts across each bulb you can see the meter here it'll be the same reading as we did earlier see they were picking up 121 volts which is the same which I'm reading in parallel with that bulb now we'll go over here getting 121 here off of that ball now cross the outside legs getting a 244 so now says this is a balanced circuit the neutral actually isn't doing anything you can see now both bulbs ripped in series to the 220 and there should be close to zero folks difference between these two I look at point six difference you okay so now you wouldn't need the neutral conductor on a 220 circus but pretended this is the two light bulbs represent a heating element and say electric furnace you also have usually the blower motor runs off 120 so let's hook up a third light bulb and simulate the motor since the our motor in this example there's another light bulb which is going to be a Hearton 20 volt motor which is very common so now these two bulbs are hooked in parallel this one's hooked in the other sit into the other leg I'll go ahead and hook to the ground back the neutral back now we'll turn it back on and you see all three bulbs are lit up you okay so right now these two bulbs are in parallel this one's running off the other side of the 220 so let's disconnect the neutral one you'll get an idea what it's actually doing it's now you're getting now these two bulbs got dim and this one's got brighter you can kind of get an idea what the neutrals are doing so this is now an unbalanced circuit you get two bulbs on one side of the 221 ball blowing the other and that will take the meter reading across this bulb you see we're picking up 171 you read across the other one picking up 72 so your 220 being split being divided this is a good example of a voltage divider so now you can kind of see which was the neutral connected it serves as a balancer it balances the load on the two bolt when old the old circuit it's like I was saying you pretend it to of these bulbs of the heater and the furnace and the other bulb is the motor burn and without the neutral conductor your lobes unbalanced so in order to maintain constant voltage no matter what load is connected you have to have a neutral to balance everything and for curiosity you can see that between the middle and the ground you're picking up 49 volts to 49 volts difference here this is the same thing if you ever heard of a lost neutral like when a house wearing or something this is what will happen to your appliances in your house like this is seeing 171 votes and these are seeing 70 if this is a computer or something other since for a TV or something other sensitive and electronic device it's going to be burning up right now this incandescent bulb will take a little bit extra voltage 120 that's one reasons tolerate but you ever hear the term lost neutral this is a good example of if your neutrals broke right now either a wires melted into or terminals corroded or something like that and it makes it extremely dangerous to you because now say this neutral was your your third prong in your house so now you get forty nine volts potential to ground see if you walk up and touch this you're getting a shock with forty nine volts whereas now you connect this to ground and you're picking up zero volts potential the ground because this is the ground everything is connected to each other well guys I guess it's about it I didn't want to do a video on this for a long time and a lot of people like the electrical Theory videos like is a fair this would be a good little interesting video to make so if you get any questions or comments feel free to leave a comment below and I'll get back to you as soon as I can thanks for watching

Channel: fnaguitarplayer9

Views: 16,111

Rating: 4.9435029 out of 5

Keywords: fnaguitarplayer9, electrical theory, lost neutral 220 v240 volt vac circuits circuit, sypmtoms of a lost neutral, lost neutral potential voltage to ground, how 220vac 240vac 220 240 volt circuits work, 120 volts to ground 240 circuit, how 240 circuits are 2 120 volt circuits out of phase

Id: v9q3EnrHngo

Length: 8min 41sec (521 seconds)

Published: Mon Feb 19 2018