How to Turn Off Ghost Voltages with Dual Impedance (LoZ) Meters

Рет қаралды 37,808

Күн бұрын

Fluke 117 Electricians True RMS Multimeter: Amazon.com: amzn.to/2cA1fne
Amazon Prime Student 6 month Free Trial: amzn.to/2J4txZw
Amazon Prime 30 Day Free Trial: amzn.to/3mqTcdq
Klein Tools CL450 Clamp Meter, HVAC Meter with K-Type Thermocouple, Differential Temperature, True RMS Amazon: amzn.to/2XfnqH4
Also with LoZ: Klein Tools CL800 Digital Clamp Meter, Auto-Ranging True RMS, Low Impedance (LoZ) Mode, 600 Amp, Measures Volts, Temp, More, with Auto-Off: Amazon: amzn.to/3dYHjb3
FLUKE-117/323 KIT Multimeter and Clamp Meter Combo Kit: Amazon.com: amzn.to/2dolxyH
Wago (25) 221-412 (25) 221-413 (25) 221-415 Lever-Nut Assortment Pack: Amazon.com: amzn.to/29huPiB
Wago 221-415 LEVER-NUTS 5 Conductor Compact Connectors 25 Pack: Amazon.com: amzn.to/29lLQpq
Wago 221-413 LEVER-NUTS 3 Conductor Compact Connectors 100 Pack: Amazon.com: amzn.to/29i3fPh
Wago 221-412 LEVER-NUTS 2 Conductor Compact Connectors 100 Pack: Amazon.com: amzn.to/29lMe7b
Fluke 902 FC HVAC Clamp Meter with Fluke Connect + 2020 NEC 210.11(B) Even Loads
Fluke 902 FC HVAC Clamp Meter with Fluke Connect: Amazon: amzn.to/2uERuQA
Fluke 902 FC PRO TE True-RMS Wireless HVAC Clamp Meter with Soft case and Line Splitter: Amazon: amzn.to/37vWF2D
Fluke 325 Clamp Multimeter AC-DC TRMS: Amazon: amzn.to/322qlmD
Fluke 116/323 KIT HVAC Multimeter and Clamp Meter Combo Kit - Fluke-116/323 KIT: Amazon: amzn.to/2OYZRgJ
Fluke 323 True-RMS Clamp Meter: Amazon: amzn.to/37vRxLy
Fluke 324 True RMS Clamp Meter: Amazon: amzn.to/2uPEabR
Fluke 375 FC 600A Ac/Dc TRMS Wireless Clamp: Amazon: amzn.to/2SQaXFF
Fluke 116 HVAC Multimeter, Standard: amzn.to/2vy92xQ
Klein Tools CL380 AC/DC Digital Clamp Meter, 400A Auto-Ranging: Amazon: amzn.to/2UCigmU
Amazon Prime 30-day Free Trial: amzn.to/2y8LjWo
Create Amazon Business Account: amzn.to/2ShmuOW
Try Prime Discounted Monthly Offering: amzn.to/3cZUaZw
Try Twitch Prime “the world’s leading social video platform and community for gamers, video game culture, and the creative arts”: amzn.to/2WelD2C
Try Amazon Home Services “quality pros and backed by Amazon's Happiness Guarantee”: amzn.to/3eZ1TsF
Kindle Unlimited Membership Plans: amzn.to/3cZLQsB
Amazon Prime Gift Membership: amzn.to/2Shs2ce
Create an Amazon Wedding Registry: amzn.to/2WcnyVk
Audible Gift Membership: amzn.to/3cWJ5s3
Prime Video Channels Free Trials: amzn.to/2VNjY5d
Amazon Family 30-day Free Trials: amzn.to/3cZFrO0
Amazon Prime Music 30-day Free Trials. Our membership program offers special benefits including: *Unlimited, ad-free streaming of over a million songs *Instant streaming of thousands of movies and TV shows *FREE two-day shipping (no minimum order size) *Borrow Kindle books: amzn.to/2YfBwbJ
Prime Student 6 month free trial: amzn.to/35eZoO8
Baby Registry at Amazon: amzn.to/3f220Dv
The video was taken with the: PANASONIC LUMIX GH5 Body 4K Mirrorless Camera, 20.3 Megapixels, Dual I.S. 2.0, 4K 422 10-bit, Full Size HDMI Out, 3 Inch Touch LCD, DC-GH5KBODY (USA Black): Amazon: amzn.to/2VvWVcV the PANASONIC LUMIX Professional 8-18mm Camera Lens, G LEICA DG VARIO-ELMARIT, F2.8-4.0 ASPH, Mirrorless Micro Four Thirds, H-E08018 (Black): Amazon: amzn.to/2Yem0JO
This video was edited with: Cyberlink PowerDirector 18 and PhotoDirector 11 Ultra: Amazon: amzn.to/2Qz2w1t
To make this video I used the ZoMei Z818 Light Weight Heavy Duty Portable Magnesium Aluminium Travel Tripod: Amazon.com: amzn.to/1XOgA5T
This video was made using the: Transcend 64GB Class 10 SDXC Flash Memory Card (TS64GSDXC10E): amzn.to/1w02Oxn
Bill and sparkychannel.com are participants in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com

Пікірлер: 82

@edlopz1722 3 жыл бұрын

Bill, I enjoy every single video you put out there. Tons of good and helpful videos. I hit the “Like” button right away . This is one of my favorite channels. Thank you !!

@SparkyChannel 3 жыл бұрын

I appreciate that! Thanks so much! New video today: How To Wire 3-Way Switches with Diagrams Included: kzfaq.info/get/bejne/qtGHm9R-v8-ypqc.html

@89DrFunk 4 жыл бұрын

Thank you so much for the clear examples and explanation. I watched 3 videos which was too vague me but you was clear with the examples. Thanks.

@SparkyChannel 4 жыл бұрын

Great to hear! Thanks!

@kristiandawe85 3 жыл бұрын

I thought about buying a fluke 77, but this meter has more than enough for my electrical needs, I have the 117 and love it

@SparkyChannel 3 жыл бұрын

I agree!

@electropentatonic 3 жыл бұрын

In 277v multiwire branch circuits I'll get strong ghost voltage on dead circuits if they share a pathway. Just picked up this meter, looks cool. I'll also pick up 120v on open neutral circuits if the open neutral still has a good length of wire. Sometimes it takes a dummy load or continuity test to ground to see the neutral isn't actually there. This may be helpful

@darrylm3627 Жыл бұрын

😀👍🏿Good Stuff,GreatTips

@konstantinusstoyanov9749 4 жыл бұрын

Your videos always have a great content

@SparkyChannel 4 жыл бұрын

Thanks so much! ⚡️⚡️⚡️🔌💡

@mathman0101 4 жыл бұрын

This effect is called an Electric field coupling (also called capacitive coupling). It occurs when energy is coupled from one circuit to another through an electric field. This is most likely to happen when the impedance of the source circuit is high. The most common places to encounter ghost voltages are blown fuses in distribution panels, unused cable runs or electrical wiring in existing conduit, open ground or neutral on a 120 V branch circuit or in card cages where 120 V control circuits are used to control assembly line or conveyor functions. When new buildings and factories are built and wired, it’s very common for electricians to pull extra wire through the conduit for future use. These wires are typically left unconnected until needed, but are subject to capacitive coupling thereby creating a potential for a ghost voltage measurement. Which takes me onto an even more interesting topic the safety of electrical wiring and electrical products due to the creation of electrical fields but more typically magnetic fields in modern homes and whether they create a potential health hazard. That creates an important issue of what testers we can use to address this and the importance of shielding from stray radiation.

@SparkyChannel 4 жыл бұрын

Thanks Math Man!

@buseini Жыл бұрын

Electric field coupling is known to damage VFD's. It will also damage the equipment i.e motors etc that are connected to the vfd.

@michaelperez9290 4 жыл бұрын

I have the same meter. Awesome vid Bill!

@SparkyChannel 4 жыл бұрын

The 117 is an awesome meter! :)

@erikyoung256 2 жыл бұрын

Thanks for your explanation. Very handy!

@SparkyChannel 2 жыл бұрын

Glad it was helpful!

@nasser.ghandour Жыл бұрын

Thank you

@tommycho9068 3 жыл бұрын

Thank you.

@garydudgeon 4 жыл бұрын

Good video Sparky. Good topic and good meter. Thanks for great comment.

@SparkyChannel 4 жыл бұрын

Thanks so much Gary!

@Eddy63 4 жыл бұрын

Good demo and Fluke products ...

@SparkyChannel 4 жыл бұрын

Thanks Eddy!

@urkkan 4 жыл бұрын

Like the old Wiggy, although not as fancy as the Fluke 117, but it does the same with its low impedance of 4000 ohm!😊👍

@SparkyChannel 4 жыл бұрын

Yes, I love my old Wiggy! ⚡️⚡️⚡️🔌💡

@math020 2 жыл бұрын

Hi iam a new electricien I was wondering if you can guide me on witch multimeter and ampmeter to buy I prefer to buy the right one right away I was looking at the klein cl800 or fluke 376 for the ampmeter And the klein mm700 or the fluke iam not sure witch modele so many on the market Thanks for your help i always what your video Great job

@grantsdad177 3 жыл бұрын

I’m looking to get a fluke meter I’ll either be getting the 116/323 kit or 117/323 kit I won’t use the volt alert on the 117 and I hear the temp on the 116 isn’t very accurate so those two features cancel out so I’m left with what’s more important micro amps or amps it will mostly be used for home diy but I like to buy good tools in case I get into a trade

@jackie9350 4 жыл бұрын

Keep it up sir!

@SparkyChannel 4 жыл бұрын

Will do, thanks Jessie!

@davidlindh7938 3 жыл бұрын

It’s using the moisture in the wood to the ground in the other box for a return. Going to loZ creates a 3k ohm resistance.

@wattsup918 2 жыл бұрын

Agreed. Ghost voltages are due to capacitive coupling in the wiring. Assuming the meter hi-z is 1 megohm, you need only 3 nanofards of capacitance to have 11 volts at the meter. I wonder what the capacitance of 14/2 per foot actually is...

@chriswarda6114 2 жыл бұрын

Hello, can you please review the Fluke 117 600v Digital Multimeter and let me know.

@MihaiDobrin88 2 жыл бұрын

can you make a video to explain vfd mode on a multimeter thanks

@chrisfyfe4047 4 жыл бұрын

Good one , I carry a 117 , and a T6 1000 .

@SparkyChannel 4 жыл бұрын

Right on!

@notme22 Жыл бұрын

Does the CL450 do DC Low resistance?

@greenled5 10 ай бұрын

I'm trying to understand how the normal voltage setting on the multimeter is a high-impedance setting. It seems like that would be a zero impedance setting since it does not affect ghost voltage

@farmerdave7965 4 жыл бұрын

My wiggy has automatic Low Z. When I troubleshoot control panels that have triacs and SSRs I like to use my low impedance test light.

@SparkyChannel 4 жыл бұрын

Automatic Low Z is the bomb!

@MrTooTechnical 4 жыл бұрын

Great vid. What brand of car battery did u use to make the ghost voltage??

@wim0104 4 жыл бұрын

one of those huge cylindrical ones on a pole, like a Z size ;-)

@wim0104 4 жыл бұрын

but seriously: when conductors run parallel, they induce electrical current & AC voltage in each other. that's one reason why there's guidelines/code about bundling circuits together.

@SparkyChannel 4 жыл бұрын

LOL! Yes, bundling wires can cause radio interferance as well.

@optimusvader7823 4 жыл бұрын

This is great , I got this meter few days ago.

@SparkyChannel 4 жыл бұрын

Nice choice! :)

@optimusvader7823 4 жыл бұрын

Sparky Channel THANK YOU ⚡️. I Being using FLUKE meters for about 15 Years and they are great . Like I said i just got a New Fluke 117 and Also a FLUKE 376 FC ( Clamp meter and comes with a iFlex i2500-18 to go up to 2,500 Amps ) . I Still have my first fluke meter ( FLUKE 75 ) and also the one that I replaced ( Fluke 23 series 3) . With Fluke you get what you pay . ⚡️⚡️⚡️🔌💡.

@SparkyChannel 4 жыл бұрын

@@optimusvader7823 ⚡️⚡️⚡️🔌💡!!!

@shuyanzhao8824 4 жыл бұрын

I understand ghost voltage but I don’t get how Low z is useful? Since you use low Z and you had 0V between a know hot conductor(120V) and a open circuit element. If you don’t know one of them is hot you could get shock

@peterfong8777 3 жыл бұрын

Thanks 🙏

@SparkyChannel 3 жыл бұрын

You’re welcome 😊

@hugos31 5 ай бұрын

fluke 117 Good

@TheGregWallace 2 жыл бұрын

Question.....I watched your video on "How to wire a half hot receptacle with power to the receptacle". I have two switched receptacles in my house like the set up in that video... one of them is the receptacle under the kitchen sink (the switched portion is for the disposal and the other half is for the dishwasher) the other switched receptacle is in a formal living room to control a lamp. My question is, I used my fluke 337 True RMS clamp meter to test the voltage in the switched portion of both of these outlets with the switch off and was getting a reading of 4 to 5 ac volts, is this normal? I'm assuming so because of the research I have done so far. We have lived in this house for 17 years and never had a problem with these outlets and everything works like it should. I have not changed out these outlets or done anything to them, the reading of 4 to 5 ac volts is what the receptacles show when off. Any info you could provide would be greatly appreciated Sparky. Thank you for your time.

@oakstreetanimals3474 2 жыл бұрын

yes. a meter with a low z setting would show 0 volts.

@TheGregWallace 2 жыл бұрын

@@oakstreetanimals3474 Thank you.

@wim0104 4 жыл бұрын

So who is this low-Z/LoZ measuring most useful for: shouldn't electricians be able to cope, and work, with ghost signals or voltages?

@wim0104 4 жыл бұрын

in this example, the regular voltage measurement proves that the metal box is not grounded properly. What is loZ doing that's useful?

@SparkyChannel 4 жыл бұрын

LoZ provides a measurement of what is wanted without dealing with confusing "ghost" voltages.

@Todestelzer Жыл бұрын

I used LowZ after a couple smd resistors on 230v and blow them up this way. You have to watch out what you’re doing 😂

@SparkyChannel Жыл бұрын

Thanks for the tip.

@illestofdemall13 4 жыл бұрын

It can be dangerous to only use one form of testing. Sometimes you can have a bad neutral and a bad ground, and the meter won't show 120 Volts. This is why I also use a pen tester in conjunction with a meter.

@SparkyChannel 4 жыл бұрын

Excellent advise, thanks!

@illestofdemall13 4 жыл бұрын

@@SparkyChannel No problem.

@SparkyChannel 4 жыл бұрын

@@illestofdemall13 ⚡️⚡️⚡️🔌💡

@illestofdemall13 4 жыл бұрын

@@SparkyChannel Using the pen tester can also indicate if there is voltage present on the ground wire, metal chassis of equipment, and/or metal junction box that shouldn't be there under normal conditions.

@mikeadler434 Жыл бұрын

👍👍

@SparkyChannel Жыл бұрын

Thanks Mike!

@wim0104 4 жыл бұрын

so the voltage here is NOT an induced voltage, nor is it ghosting; the breaker is on, right? sometimes ghosting is caused by damaged insulation, i.e. voltage leak. Any other cases?

@SparkyChannel 4 жыл бұрын

Yes, it can be just normal electrical field interaction. For instance on standard V setting, a light coming closer to your meter can cause a fluctuation in the reading. LoV setting just gives you the reading you want in most cases.

@wim0104 4 жыл бұрын

finally watched this video properly: this case with a low voltage drop from "120Vac live wire" to "not grounded" is nothing to do with ghosting. This is plain old "missing ground". I don't see how LoZ is actually helping here? Same with "open neutral".

@GODofAbrahamIsaacandJacob 2 жыл бұрын

@@wim0104 Hopefully this fluke article will help clarify... www.fluke.com/en-us/learn/blog/digital-multimeters/dual-impedance-digital-multimeters