Grounding for signal integrity (less interference), as opposed to safety, is a whole special art ! The chip maker Analog Devices, has many documents on this issue when it comes to instrumentation for electrical and electronics engineering. But in short, the "best" grounding scheme (most of the time) is the "star method". That is run a separate ground for each device, back to one point. That point is also connected to the "safety ground", which is the one connected to neutral. But that's just most of the time. The true best ground routing, is specific to the details of that specific job. My normal response, is that "the application" determines what is the best method. So, in your case, it may not be as rigorous, if needed at all. Grounding for a large radar installation, or TV broadcast transmitter, are not a little green insulated 12 gauge wires. Its whole conducting structures, interconnected with heavy braiding.

@whatevernamegoeshere3644

2 жыл бұрын

A ground might not be connected to neutral at all with wires. In a TT system for example all you have is a ground rod in the soil. Also star point grounding is tricky too because here in europe if you want to do that, the backbone wire needs to be 10mm2 copper at least and the branches need to be 6mm2. In the factory we work for the internal standard calls for a 16mm2 backbone. If you want to handle ESD or noise, you need a whole new ground too lol. You will have your PE in the feed, the equipotential PE and the noise suppression/ESD PE, all running back to the distribution board to the same PE rail. Also a side note, you probably know this but it wasn't exactly clearly said. Do NOT connect ground and neutral. You can only branch off a PE from a PEN conductor in some cases and that's it. Once separate, they won't meet ever again.

Great editing brother!!! Love the information…

@michaelbristow7494

2 жыл бұрын

certified plumtrician Roger over here

@DonaldEdney

2 жыл бұрын

What is this, a crossover episode?

@guts1005

Жыл бұрын

Lol literally watching both your guys videos to see which trade i want to pick up. You both have amazing videos and helps me understand whats going on easily. Definitely want to get my hands going already on both trades to just see and feel for the trade. 5 more months till school but i want to start getting my hands going! Haha

In most home situations, like home theater installations, hum results from the different ground potentials that may exist between receptacles that are connected to alternate legs of the breaker box. Best case is to assure all the equipment in the home theater system or even a stereo system is plugged into receptacles that are on the same breaker box leg. I had this done when I was renovating my house, and the electrician made sure all eight receptacles connected through three twenty amp breakers were all connected to the same leg in the breaker box. No hum - no worries. I have seen some installations using isolated ground receptacles that claim to have even less noise, but I am not sure they really had an isolated ground or just wanted to have a beefier receptacle.

@bryede

2 жыл бұрын

However, ground loops can occur between two components on the same power strip simply by the triangle formed by 2 power cords and a shielded interconnect between them simply because the two components utilize the ground connection in an inconsistent manner. Sometimes all you can do is select the most "central" component to be your grounded one, and lift all others. Remember that equipment typically has a ground connection for safety purposes, so a short to the chassis will throw the breaker, and not for any performance reason which is why most AV components use 2 prong plugs. This gets more complicated when you have an outside coax coming in which provides another remote ground point to your system.

@FOH3663

2 жыл бұрын

Many good points... Additionally, a "star" grounding approach of dedicated, isolated grounds for each component, is the theoretically ideal starting point... all routed to a (measured) low impedance ground path. Then, only if needed, lift a chassis ground. Bill Whitlock from Jensen, has an industry reference white paper on grounding loops. Also, John Brandt, has a superb pdf on low noise wiring for audio. Both works are easy to find.

@okaro6595

2 жыл бұрын

The antenna or cable connection can also cause it. Getting a galvanic isolator helps.

Great topic and explanation. Please, more videos like this that address ways to maintain and clean-up our power.

my band was working at a small town street dance. They gave us two extension cords, one from a store on the east side of the street and another from a store on the west side of the street. All of our equipment is safe. I was the band tech and I checked all equipment each month. Now our lead singer is holding his mic and then reaches out to grab the mic stand. He received a very nasty shock. His arms where numb for hours. I figure I had a potential difference on my two grounds as they where coming from buildings about 50 feet apart. I told this to the town director and he looked at me like I was an idiot. A ground is a ground he says to me.

Thanks D, your theories are filled with clarity and showing how it's done practically just make it exceptional.

Thanks for that info. I never had a wiring job that required this system, but always wondered about it. Your explanation is clear and concise. We never stop learning.

At one company I worked for, we had to measure mV level signals that were around 60Hz so an isolated ground was important and installed a separate three point ground on out test floor. We actually bored holes through the floor and installed three 20ft ground rods.

All these vids are a great rewatch tooo ... thanks again for all the work you put into your channel and the education ... it's been a delight being subbed all these years to your glorious channel. Hope ya have a perfect weekend and thanks again for all these vids

Yes! Labels eliminate confusion and loops give expansion/upgrades a good chance. Thank you for illustrating those points.

Finally! You’ve wandered into my area. Hearing you take a second to collect your thoughts on how EMI can affect sensitive equipment was awesome. I’m imagining you were going slow so you didn’t look foolish. Maybe that wasn’t your thought process, but it’s certainly mine whenever I have to do anything remotely electrical. I.T. & Datacenter design? That’s easy. Electricity is basically magic. Also, kudos for the service loop and flagging unique runs. Ohmygod is that appreciated.

i just subscribed to your channel on my home computer so i don't miss learning anything from you guys. i am the home owner that commented ... i am going to learn a lot from you guys... i am not an electrician... however i do know and understand city codes and am learning this to keep my old home from frying itself and as a home owner to learn better in order to properly talk to an electrician and tell them what i want . i respect all handy men /women and electricians in what they do ... most home owners don't understand that what they want and what they are allowed are quiet different and it makes the electrician frustrated because they can't explain why. we need to communicate and work smarter not harder .. in the end the customer will be happy and so will the service provider doing the work. i am a home owner with a computer degree and electronics background etc .... and i want to learn from the basics to everything else.... thank god for electrician u .... " i am going to learn a lot"

In my experience in the early 2000's is when IG grounds and super neutrals were most common. During that time the electrical engineers would have the IG pass through the associated panel via an osolation ground bus and then to the building steel or the associated xfrmr. Thank you! I watch your videos often.

Learned something new. Easy to follow and well understood. Thank-you.

Thanks for making this tutorial. I learned about isolated grounding when I was a teenager back in the mid 90's from researching how recording studios and HiFi listening rooms are built. Yes I was that guy in high school with a basement bedroom equipped with a 4.0 home theatre and loud guitars. I custom built my A/V equipment stands in woodshop too. 🔥🎸🔥

You are a great instructor...im an electrician for over 45 years...and am humbled at your segments very thorough and yo the point. Keep up the good segments sir...

Thank you Justin. A complete example with futher interpretation of the code and safty. thanks again.

love this, I'm 4 months away from taking my journeyman exam. Much love from Nebraska!!!

You really cleared things up for me on this video and especially the referenced grounding/bonding video.

Awesome effect at that first minute, fading away from and back into the video. Beautiful

Hey Dustin, when we did jobs that required isolated ground receptacles in commercial buildings, our method was to run a separate grounding conductor up the wall in conduit above the ceilings and bond to the nearest building steel girder. Then we would find the low voltage transformer feeding our panelboards ( 120 / 208 volts 4-wire ) and make sure the neutral or X0 terminal on the transformer, where the equipment grounds were bonded to also had an additional conductor that ran up the wall and also bonded to building steel. We Then used that separate isolated grounding conductor, which passed through our panelboard, not connected, then ran this isolated conductor in conduits to feed all the isolated ground receptacles in the rooms that needed them. And yes we had to identify these conductors with yellow tape or similar markings to pass inspection.

I'm a military veteran I used my gi bill to get my associates electrician degree and certification, I've had such a hard time trying to get into the electrical field, alot of work is union work, I finally got a foot in the door and watching your videos has helped me even though I don't have the experience, thank you for what you do!!

@Bludcharg4214

2 жыл бұрын

Experience >>> piece of paper. Sorry to break it to you, but to me that's a sign of disrespect to the guys that paid their dues during apprenticeship.

@Morberis

2 жыл бұрын

Yeah to say that it's because of unions is not true in my experience. Employers want you to have relevant experience before they'll look at you and that can make it hard to break into something. Whether it's the trade as a whole or a specialized part of the trade. A union just means you have to sign up for the union. Apprenticeships aren't going to have huge issues with seniority based hiring because almost by definition an apprentice has little seniority. Btw this thing that some US states have where the electrical trade isn't a bonded trade is crazy to me. I don't think requiring an apprenticeship under journeymen is an undue burden at all. And it's how you end up with electricians that don't know the trade or even how basic elements of the trade work. Like motors.

@michaellongstreet5802

2 жыл бұрын

@@Morberis is there any advice you can give me in my position? I totally understand experience trumps a education in this case, however I thought it'd would look good on me that I'm dedicated having spent time and money on it, and we all got to start somewhere, this is something I'm fully committed too and I want to be my career, it's been hard for me to try to get into the union which is why I'm looking to try other options, it's something I want to do ASAP!!

@Morberis

2 жыл бұрын

@@michaellongstreet5802 Sign up for the union then apply to the union jobs from the union job board if they have that. Up here you won't even be considered if you apply for a union job and want to sign up after. I agree it does look good, but it might take awhile.

From 4 decades of work as a Clinical Engineer, we used IGRs in Operating rooms and designated "Wet Locations" to reduce the risk of electrocution from micro shock. Line Isolation Monitors were also used to insure the isolation was not compromised. We never used Isolated Ground circuits for equipment protection.

@johnchase7667

2 жыл бұрын

The ground wire if isolated or not will not protect a user from electrocution if a hazard exists that causes a metal case to become energized if the resistance to ground is not enough to trip a breaker.

I've been learning a lot from your videos! Thank you!

RE: Running the isolated ground to a different ground rod: In addition to the "no trip" problem you mentioned, I would also add that... 1) It could be a shock hazard due to the possibility of a voltage difference between ground reference points. 2) If you have equipment with interconnected cabling, if one piece of equipment is plugged into an isolated receptacle and another into a normal receptacle, a fault current (or any difference in potential) could run through the equipment and destroy it. 3) Slightly Related Side Note: Let's say you have multiple grounding points (i.e. multiple rods or a rod and water pipe) which are of course supposed to be separately all bonded together. In that case I suggest caution when running and connecting the required bonding cables since there is the possibility of a significant difference in potential. i.e. I would not grab the ground rod with one hand while grabbing the wire you intend to connect to it with the other (especially if the other end is already connected.) An example would be where you have an antenna mast or tower (TV, Ham, etc.) where you want ground rod(s) at the base for lightning protection (or as part of a ham antenna counterpoise). You don't want the RF cable shield to be the only connection between that ground and the service ground. Thanks for your excellent videos!

@WolfangStudios73

2 жыл бұрын

I think I just found another Ham... good info! 73

@brucej9575

2 жыл бұрын

@@WolfangStudios73 you are absolutely correct. 73 :-)

another informational video. good job keep em coming. never to old to learn.

Great video!!! Your content just keeps getting better and better!

I thought the transition from me watching you, to the camera pulling back and looking around, then back to just you was wicked.

awesome! i was amazed how little info on youtube there is about these. thank u!

I loved the end of the video where you guide Viewers to other helpful Videos 💯

Perfect timing! The wife and I were eating at Texas Roadhouse and saw these orange receptacles. I was wondering what they were for. Now I know. Another great vid 👍

@phillipsusi1791

2 жыл бұрын

Weird... I wonder why they would have these?

Excellent info as usual. Great content

Great transition out and back from the monitor and good explanation for IG.

A diy guy like myself will probably never need one and the professionals already know what this is but I still have to Give A like for the new information explained in a clear way!

@GregoryGuay

2 ай бұрын

I’m guessing there’s a lot of professionals that have never had to even install an isolated ground outlet… Unless they’re working on hospitals or high-end recording studios and home theaters… I’m researching a “star grounding“ system that is supposed to reduce EMF…. I’m just a DIY but several of the licensed electricians don’t even know what it is.

Excellent video. I can tell it was quite well thought out :) Subscribed!

Greetings from Puerto Rico 🇵🇷 Thanks for your content. I always watch your videos to get further educated 👷🏽‍♂️⚡️

Great Video! Thank you for sharing this.

awesome i’ve been waiting for a video like this

Very informative. Thanks!

Hey Dustin, appreciate all the hard work you put into your channel!! I have a question on schematics/prints how often are you looking at prints during new construction, and is it a vital skill to have as an apprentice?

Excellent explanation on this sir, I learned something new watching this! I'm not a professional electrician but I'm comfortable working with it. I'm your classic " Jack of all Trades - Master of None. " Bill... :~)

Great video Dustin keep them coming I learned a lot about those IG receptacles pretty cool lol

Great explanation!

Very well articulated and informative.

Thank you for the very informative information.

Excellent video. I learn something new right here

As I understand it, ground-loop induced hum and noise is caused by voltages induced in the low voltage signal-carrying conductors of shielded cables. This is due to 60 Hz current flowing through the cable's shield, when the shield is connected between two or more equipment chassis and when the chassis have different AC potentials - which is usually due to power transformer leakage current. Another factor is that the various chassis are interconnected by wires having some amount of AC resistance (impedance). This impedance, then, may be too high to effectively shunt enough of the noise current caused by this potential difference to eliminate the resulting noise. So, although installing IG outlets and the accompanying additional ground wires is outside my recording studio project budget (IG outlets seem to be about 4 x $$, plus the cost of the copper for the extra ground wires), your excellent video gave me an idea: Using say, #12 wire, reduce the ground impedance between the various equipment chassis plugged into different outlets on the same circuit, by paralleling the existing ground wires connecting the NON-IG outlets on that circuit. It seems that hum would be reduced to whatever extent the impedance of the ground wires connecting the various chassis is reduced. I realize that the extra ground wire would add cost, but there still could be some overall cost savings while improving noise performance over a conventional non-isolated-ground system. I'd welcome any comments on the expected effectiveness of such a method or that may correct any flaws that may exist in my analysis. Thanks!

Great explanation! Thank you for an excellent video

Excellent information and tutorial! Thanks for sharing :)

Dear Dustin, thank you!!!

Thanks for the informative details

Awesome video Dustin, hey I know you don’t like nylon bags but the toughbuilt master electricians pouch is amazing 🤩

Thanks Dustin great info

That was a slick transition to the handheld

Great video as always! I do have one question: Can you post a video elaborating on which specific "fast tabs" you prefer to use in your NEC?

Nice video transitions

Maybe one day you could do video on how to 'run wires' to minimize ground loops and noise - the biggest enemy of many audio installations.

@absalomdraconis

2 жыл бұрын

For noise in general, run the conductors adjacent to each other, spaced as close together as possible, over as short a distance as possible, as far from other wires as possible, crossing any other wires as close to right angles as possible. Those rules will sometimes conflict with each other. It is also good to run the wires through electrically contiguous conductive conduit, since the conduit will provide some level of shielding. In essence, it all comes down to reducing the interaction of the wires to any electromagnetic fields that are nearby. Diverting the EM into another conductor (the conduit) is one way, reducing the signal strength that reaches the wire (the conduit, maintaining distance) is one way, and reducing the area of the "absorbing circuit" (wires that are spaced 2 inches apart enclose twice as much space as the same wires spaces 1 inch apart) is one way.

@GregoryGuay

2 ай бұрын

Research STAR GROUNDING. Studios do this often…. I’m researching it myself and need to understand the difference between this isolated receptacle, grounding technique versus star grounding

cool edit!

Where I used to work, there were three kinds of ground: Yellow-green = protective ground Yellow-red = instrument/equipment ground Yellow-blue = ex-system ground I guess the yellow-red would be similar to isolated ground

The service loop is a nice add. We do that with network cabling, too.

💚💚💚💚 bookmark/ notes : 09:30 warehouse rot grounding rod …..ect….tbc…..-g-b, bot

great explanation!

Kick ass. Great vid.

Great information bro love it... i build a diy cnc table and it is have a trouble that wen it start to cut suddenly stop without any errors code!! so it took me 4 month and I find that (electromagnetic interference) EMI Is the case of my problem!!! So know i need to know more about how to ground the system perfectly. Thank you brother

Have not installed an IR receptacle in over 25 years. They were popular back in the 1980's. Had stores that purchased new fancy electronics cash registers and insisted that they all needed IR receptacles. Okay will waste your money. Ran new circuits to each location using 12/3 MC cable. Used the green conductor as the ground to IR receptacle ( ran it to where the service was grounded ) and reidentified the red wire as a ground to ground metal box. Did not help. Clown cash register tech wanted me to drive a ground rod and only use that to ground the IR receptacles. Told them it was not legal but insisted I still do it.Some how they figured problem was with the cash register. Best part store manager never told me that on those cash registers when they loose power for even a few seconds they loose record of sales tax that was paid. If cheap manufacturers would only use proper line filters on their equipment there would never be a need for IR receptacles. At the 5 million hospital/research center that I retired from we had at least 4 boxes of Hubbell IR receptacles collecting dust for over 15 years in bench stock room. Never seen a single one used anywhere.

@shockcoach

2 жыл бұрын

👍👍👍

Great presentation! You are an excellent instructor. If I were doing a remodel on my place, you are the guy I would want doing the electrical!

THANK YOU!

Thank you

The transition at 1:10 😳 fire 🔥

So earlyyy LOVE IT!!!

Where I worked they used those isolated ground receptacles with large surge protectors installed in the stairwell at the end of the hallway. Any room you were in and needed to plug sensitive electronic equipment that could be damaged by an electrical surge could be plugged into the closest orange receptacle and you would know it is safe from an electrical surge. They were also paired with an orange wall switch so that at the end of the day when everything was shut off you could flip the switch so all of the electrical devices that did not have to use a shutdown program to shut off could be shut off as well and save some money on electricity. Then when you showed up for work you would just flip the switch on with the lights and by the time the computer(s) were turned on all of the printers, monitors, and network switches and stuff was already booted up and ready.

Can you have multiple outlets on a single isolated ground or does every receptical require its own conductor?

@bryanjk

2 жыл бұрын

Wondering this as well

@guytech7310

2 жыл бұрын

Ideally to the receptical, but that is not always practical. it may depend on the application.

yup, similar for datacom racks: dedicated #6 homeruns for each rack frame to a ground plate with the 3-ought on it, which is part of the building grounding grid.

Spent 45 years working in industrial plants. There is no end to the finding of dangerous ground currents going thru I- beams, cranes and down hydraulic elevator shaft cylinders running 50' down in the ground. Finding a radio-controlled crane going nuts, because 65 amps is running thru the crane bridge I-beam, was a real kick in the head. Sparking on the steel wheels as it moved was the first hint. Having the bottom of the elevator piston/cylinder arc holes out to ground was another. Different transformers on different substations in the same building can cause some weird things to happen.

I do mostly resi service work and I don’t think I’ve ever once even stocked an IG duplex receptacle on my van since I’ve been in business!

@shockcoach

2 жыл бұрын

I do a lot of telecom and data center work, and haven’t had to install one of these for the past twenty years.

@jeffkardosjr.3825

2 жыл бұрын

@@shockcoach I worked at one where I don't remember these outlets being used. It was either nominal 220 with plugs or direct connections from what I remember.

When I worked for a local 3 in New York City IBEW .We did hospital work all the equipment had an isolated ground hook up to the building Steel skeleton.

No fuckin way bro you actually made a video about a question I asked! Lol, idk if I was the only one or not but I asked this question in a prior video and I am so glad to finally have an answer. Thankyou so much

Excellent video... question.... if i have a computer's in my basement workshop and a test bench fo testing and repair of electronic equipment would it be in my best interest to change existing outlets to isolated ground outlets?

This is a very interesting subject. The orange outlet looks just like the outlets used on isolated power systems in operating rooms in hospitals. The purpose is completely different. Have ever considered a video on such systems?

I like the editing! I'm wondering if I should check into this type receptacle for my sound system and computers. I also have a lot of wires running everywhere.

Great video as always. Had a question, in the case of more than one IGR are we looking at a separate ground for each or can the 2 or more IGR be on same isolated ground?

@michaelmurph5864

2 жыл бұрын

Yes, you can have multiple receptacles on the same isolated ground just the same as non-isolated circuits.

@shaggydayshorseshow9567

2 жыл бұрын

One isolated ground can run to multiple receptacles. (If they had to have a separate, home-run ground for each, a duplex outlet does not seem appropriate, either.)

@seanet1310

2 жыл бұрын

What you can do and what you should do depends on your use case and sensitivity of equipment. It is better to go back to a common point running individual final runs rather than two final runs together as that loses a lot of the benefits.

Great info. Thanks. Would you do patient care wiring, too? It would be a great comparison between IG and patient care, which we use iso wires for both on field.

@GilmerJohn

2 жыл бұрын

Using an "isolated ground" on stuff that's "wired in" to the patient care might increase the risk and the noise to the patient unless the hole room uses a "single point ground" and that ground goes back to the "isolated grounding point" at the power panel or wherever. And when you do this you still should protect this isolated ground from large faults by having, say, back to back diodes connecting your "isolated, single point ground" with the bonding ground which is connected every which way to the building steel. Massive grounding usually works best and what it doesn't solve you are address with two wire signal paths.

@stpetercho

2 жыл бұрын

@@GilmerJohn I meant we use Iso bx, because we need 12awg green wire minimum, not to isolate ground. Since he creates really good video and explains easy, it would be helful to lots of people.

Thanks good job god bless

Look for Euro wires where you can get Yellow/Green wires out of the box if you want to do isolated ground. Then you won't need tape that can go missing. But I also see that the shielding ground could be done with blank wires which would separate it from the protective ground.

Awesome video. could you please help understand alternating,especially the waves.

VERY informative. I wonder if the oens I have are wired correctly

Wow an early delivery of a video

Awesome video, Sir! Coming from the UK our wiring & standards are different (We don’t use split-phase supply, and AFAIK we don’t visually identify outlets with an isolated ground) but for US wiring the EU colour scheme for earth conductors (Striped green & yellow) sounds like it could be useful. 😇 Quick question: In the orange duplex outlet shown, do both outlets each have an individual ground terminal, or do they both connect to the same isolated ground conductor? (In the latter case, it sounds like a ground loop might form across the outlets, though less of an issue as they’d be fed from the same live.) Cheers for the great video! 🔌😇👍🏽

FYI: A loop would be bad for noise because it will allow noise into the isolated ground, and it also adding a small amount of inductance which is bad for low noise equipment that is using the ground for filtering.

Great video, this i such a cool topic! I'm curious though, if the yoke of he device is isolated from the pole that the equipment plugs into, how is the receptacle itself grounded? Is it just by the yoke's contact with the grounded metal box?

@ronh9384

2 жыл бұрын

The ground screw on the outlet is a home run.

That octopus looking thing must come in handy when you need an extra set of hands LoL

Just a note, @6:06 I'm not sure if the NEC outright states it, but you should always leave 12-13 inches (1 ft or .3 m) of cable inside the box when the cable is not used in that specific box (i.e., when the cable is just passing through the box); the logic behind it is that splitting that cable in half allows 6 inches of free conductor if you want to create a new splice. Also, it allows a bit of extra slack in case of earthquake (not that I've seen many NEC practices account for that... at least in my very small amount of experience). However, NEC ***does*** state that "6 inches of free conductor" must be left (visible) inside the box when splicing (like making pigtails), including when you're making bonding jumpers (like from the metal box to a typical grounding cable). This means you can't make a 2-inch bonding jumper to save some wire.

I'm an EE who designs and installs broadcast TV facilities, which use IG for all technical equipment loads. Typically there are 4S/5S boxes under a raised floor that are conduit connected with a seperate IG wire. I have seen electricians just take a plain MC cable and run that up from the under floor box to an IG power strip in the rack using the MC green wire as the IG. But doing this means the MC jacket is the safety ground and that's not allowed for MC. You really need 4 wire MC cable and use the blue wire for the IG, and they even make MC cable with a green/yellow IG wire but it's hard to get. As MC whip is only a couple of feet, I let it go and inspectors don't seem to notice it either. But it's not to code. Comments?

@mikefochtman7164

2 жыл бұрын

As I read this, I was thinking both the 'safety ground' as you call it and the IG ground needed to be green by the code. But then you mentioned that further on. Otherwise, seems a good practice.

@chuck6652

2 жыл бұрын

I would consider it acceptable, seeing as how it’s only a few feet long however my coworkers and my local inspector would likely disagree with me. There’s certainly a right way to do it that you should plan on doing next time. 4 conductor mc. Reidentify a hot wire to be used as ground

@Channel-JJ

2 жыл бұрын

My question is why? In 30 years I've never seen an instance where an IG receptacle provided any useful mitigation. I've never spec'd them in a design and have never had an issue. Every wire, every metal conduit, every piece of rebar is a potential antenna for noise and other radiated or conductive means of interference. The best solution is properly designed electronics and a good grounding grid.

@chuck6652

2 жыл бұрын

@@Channel-JJ in the event of a ground fault, with a shared grounding conductor, that conductor, which is connected to several devices, has the capacity to carry massive spikes of current to and through the very frame of everything which it is grounding. Now the path for electricity still exists when you have a IG, however the difference in resistance leads to a literally unmeasurable level of voltage being passed through/on an IG even when there are massive ground fault events. Obviously charging the frame of sensitive equipment isn’t a great idea, especially in the health field. It has the potential to damage data as well as the integrity of the machine. I completely agree with what you’re saying in regards to picking up and moving voltage as an antenna, however I think that that’s a rather small piece of the situation. Dustin failed to relay the entire risk of sharing grounding conductors between several receptacles/machines in his video.

@Channel-JJ

2 жыл бұрын

@@chuck6652 My comment was in response to Delle's comment regarding using IG rec's for broadcast tv facilities. I'm not sure I fully understand your comment. It seems you are saying that an IG rec installation benefits in that there is less resistance in the circuit should a ground fault occur and the fault path involves less equipment. I think it is important to consider that before 1980 there were no IG rec's and the reason behind IG rec's was not as a means to provide a better fault path. If done according to code requirements a standard equipment grounding system will be sufficient to safely cause protection devices to open. I think the video was fine in relating the reason why and code requirements for and IG grounding scheme. My opinion has always been the reason behind IG rec's is flawed and was a quick response to increasing computer equipment and power quality issues related to such. I've yet to read any studies by the IEEE or any other such body that shows the merits of IG recs.

Pretty cool! Did you ever get into Harmonic Frequency interference from electronics, and running a larger neutral to correct it, and isolate the bond with an IG receptacle?

Excellent, funny; now that I’m retired I find myself viewing one on the better shows on electrical. Maybe it’s your good delivery on subject matter?How did you put it “that’s why we bond”.

Great information! For sensitive equipment, I would think a non bonded ground with GFCI protection would be the ideal solution. That way if there was any type of ground fault, the GFCI would trip and shut power off.

@derekofbaltimore

2 жыл бұрын

And no possibility of ground side noise!

@averyalexander2303

2 жыл бұрын

@@derekofbaltimore Yup

@news_internationale2035

2 жыл бұрын

Depends on the equipment. You might need the ground for lightning protection.

Could you consider doing a video on Wiremold/SnapMark raceways and any relevant special code concerns involved with it?

@mikemacdonald2032

2 жыл бұрын

I prefer not to use wire mold. Would rather just run conduit. It's better protection, and looks cleaner.

Your videos make me want to become an electrician! Keep up the great content

Also recommend to use armored cable "BX". This cable has a grounded shield that will do an amazing job in blocking interference from emitting or receiving interference on the cable.

There is another technique for noise reduction that compliments IG... Twisting the current carrying wires reduces the noise by factors of thousands. So twisting the neutral and load Then having IG in the conduit is the Lowest noise AC possible. Ask Bill Whitlock. The AES Toronto just did an episode on it with him.

@jeffkardosjr.3825

2 жыл бұрын

Seemed to be a common thing to do going to some light switches in the old days.