Demonstration of Ghost Voltage in AC Circuits

Рет қаралды 17,239

SamuraiRepairman

Күн бұрын

Learn appliance repair at mastersamuraitech.com

Пікірлер: 31

@JC-sc9rx Жыл бұрын

What about in instances where it's high voltage to a load instead of low voltage?

@gassanali8667 4 жыл бұрын

I'm too inexperienced to understand relay connections to make sense out of this demonstration. Anyway, I like all of your videos. They seem to radiate with quality.

@willyrivero470 6 жыл бұрын

Excellent real life explanation. It's so much clearer this way! Thanks for the advice. I actually never used the low impedance function because I didn't know! Even though I'm aware of the ghost volyage situation. Do all Fluke meters have this function? I have a 189 Fluke model.

@willyrivero470 6 жыл бұрын

@@bengkelbawahpokok6753 You are right. I just realized after checking the manual, that mine doesn't have it. But I guess I might simply use a simple multimeter with low impedance for certain cases. Thanks for your comment.

@stephenarling1667 4 жыл бұрын

@@willyrivero470 A suitable shunt resistor in parallel with a high impedance meter will obviate the ghost voltage problem. Some inexpensive meters will have high enough impedance to show ghost voltage. This is true even of some inexpensive analog meters.

@willyrivero470 4 жыл бұрын

@@stephenarling1667 Thanks for your comment. I was thinking of using some kind of loading but never came to my mind using a shunt. Thanks so much.

@gonzgarr1592 6 жыл бұрын

nice to see you out on the field making videos thanks

@kestralzoe9310 2 жыл бұрын

Very important point for electrical engineers.

@cmhvacr1010 5 жыл бұрын

So the nueteral on the other side of the bake element at terminal 1 on p1 is creating the potential difference between 1 and 4, I don’t get why this would be much of a head fake because at the points ur reading should be read like a switch, 110v signaling that the contacts are open between the 2

@abaenaful 4 жыл бұрын

Yeah I don’t getting neither. It should read 110 and it is reading 110 V. And on in position it should read 0 so I don see the ghost voltage no where. I wish I could understand better. I will keep researching.

@AppliantologyOrg 4 жыл бұрын

If the only open in the circuit was at the bake relay (where I was measuring) then the expected reading would have been 240 VAC, not 120 VAC. We are supplying L1 and L2 to the element, not Line and Neutral. As it is, the L2 conductor at the bake relay is open at two places: one at the bake relay and the other end is open at the DLB relay. The voltage difference measured across the bake relay in this condition is produced by the L1 conductor capacitively coupling voltage into the open-ended L2 conductor.

@abaenaful 4 жыл бұрын

SamuraiRepairman thanks to written explanation I get it know. Will be getting in you your course latter this year.

@TheGregWallace 2 жыл бұрын

Question.......What can you tell me about ghost voltage on a switched 120 volt receptacle in house (in the USA) for example the switched receptacle under the kitchen sink that controls the disposal. When the switch is off for the receptacle I get a AC volt reading of about 4.5 volts at the receptacle. I get the same reading at another switched receptacle in our formal living room that is used to control a lamp.

@jeffm2787 3 жыл бұрын

10 Meg input impedance on most meters will do this. I have meters with Gigaohm input impedances that can detect a chair rolling on a floor from 15 ft away.

@sandorfogassy3007 2 жыл бұрын

Thanks!

@josephswenson129 2 жыл бұрын

question : i have 2 #12 wires coming from breaker box on separate breakers they only come close to one another where they pass through 1 wood stud through a 3/4" hole, otherwise they are separated by about 4". one line is about 8' long the other 12', when i turned on the power on the long line the two outlets on the short line all showed red on my circuit power tester including common and ground. i opened the wall thinking a drywall screw had hit the wires,their was ,no damage to either wire (i could get no voltage reading on my volt meter) checked the other tester on other circuits and it is fine.. i pulled the wires from the box back through the shared hole in the stud and drilled a second hole for the second wire, put everything back and the tester showed no problem.turned on both breakers, everything ok. was that ghost electricity or what?

@DimensionFluke 4 жыл бұрын

Why am I seeing lil bit of spark without volt dissipating.

@rscelectrical7091 6 жыл бұрын

Problem is that very few meters have the low impedance function on them, that's why it's always better to test a circuit under it's normal load. The other way would be to use an Analogue meter for voltage testing.

@stephenarling1667 4 жыл бұрын

Some analog meters, even relatively inexpensive ones, have sufficiently high impedance to show ghost voltage. I know, from personal experience.

@bugvswindshield 6 жыл бұрын

Know your points of potential.

@elmbaker1683 3 жыл бұрын

What is the average cost of a lo z multimeter today?

@joesnetworking236 2 жыл бұрын

I just got one today from Amazon for 99 bucks. Kleine Tools. I was having what seemed like ghost and I was able to confirm today it was with the LoZ function. It was driving me nuts.

@lieutenantlawson4295 6 жыл бұрын

That's some good shit samuri! !!

@Vanlifemikeandbear 4 жыл бұрын

hello new here..if i take your course would i get a diploma of passing your course?

@AppliantologyOrg 4 жыл бұрын

Yes, each course has a certification. And if you get certified in the Core Appliance Repair Training course, you are eligible for a free Appliantology membership. Read more here: mastersamuraitech.com/mst-certification/

@wartome3196 3 жыл бұрын

I’m sorry, I’m late here by 2 years but I have a question. I have a GFCI outlet I installed in a bathroom. This 3 wire setup goes directly down to a junction box, but the ground is not hooked up to anything in the box. Everything else in the box is old and 2 wire, so my ground wire just ends in this box. But my ground wire in the gfci box has 50 volts shown, is this “ghost”. I mean I can literally see the other side of the wire not touching anything inside the box. The reason I noticed this was because my new gfci outlet wouldn’t test properly. I need this damn outlet to work to get my VA home inspector off my ass, crazy

@houptee 3 жыл бұрын

Did you ever figure this out? Sounds like your main neutral from the power co might be bad connection or open at the main panel and the grounds are carrying the residual current back to ground bar. Get it checked out asap.

@wartome3196 3 жыл бұрын

@@houptee I ended up running an entire new wire to that box and connecting it to another junction box in the basement. Had no issues with it since. When in doubt, rip it out.

@houptee 3 жыл бұрын

@@wartome3196 I had a loose neutral last summer out on the street. It was causing all kinds of weird problems. GFCIs tripping, lights dimming on some circuits and lights brighter on other circuits. I put a amp clamp on the main ground by the rod outside and had 4 amps going into the ground rod. I called the power co and they came asap. He found the neutral crimp loose on their wires for the service drop across the street. He cut all 3 wires and cleaned everything then put 3 new compression crimps. No problems since. That can be really dangerous when you lose the neutral the current returns on the other hot leg imbalanced and some goes thru the ground wires trying to return to the transformer via the earth ground. Can make cable TV wires hot and appliances grounded frames can shock you.

@wartome3196 3 жыл бұрын

@@houptee I do have some of the issues you talk about but it’s hard to pin down the causes. It also doesn’t help I have no clue what I’m doing lol. I feel like my house is safe but the people before me must not of cared about that standard.