CONDUIT FILL EXAMPLES for the Modern Electrician - How Many Conductors Can I Put In...

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This video is packed with useful information on how to calculate examples of conduit fill using the National Electrical Code as the basis. If you've struggled understanding conduit fill, this should do the trick.
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Many electricians struggle with understanding how many conductors they're supposed to put in a raceway. If you haven't had a formal education over how to do this, or did not have a good teacher this may be something you struggle with often.
There are 4 different tables that you need to familiarize yourself with in the National Electrical Code. These are:
Chapter 9 Table 1
Chapter 9 Table 4
Chapter 9 Table 5
Annex C Table C.1
Chapter 9 Table 1 is a good place to start as the notes under the tables tell you exactly how to deal with conductors of various types and situations. In this video I go over conduit fill for different sized conductors, same sized conductors, and nipples - when dealing with THHN conductors and EMT (electrical metallic tubing).
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29 сен 2024

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Комментарии : 381

@juancaban5440 2 года назад

I've been watching your videos for about 6months now and really liking them a lot, I specially love your code section. Learned a lot. Thank you.

@zerojdb 10 месяцев назад

I’m a Journeyman Electrician & I haven’t been in the books in over 4 years…I’m going for my Masters. Your video is the best one I saw so far!! Very well put together and I like how you show where to go. Thank you for the video It starting to come back to me:)

@Avocado_Gravy 4 года назад

Haven't been in industrial much? The codes generally above and beyond sure but it's the same principle as ty-wraping. In our local, no more then 6 MC under one wrap to allow for heat disipation. You'd agree in the MC case it's got nothing to do with insulation damage. Although that's definitely part of pipe fill

@ElectricianU 4 года назад

LetsTerriblyPlay I agree bundling is an issue which is why we der are conductors that are bundled as well as those requiring temp correction for ambient temps. I don’t agree conduit sizing has anything to do with it. Those 6mcs are not in conduit. Also if that were the case the jacketing of the Mc could be considered a conduit itself, but the manufacturer fills that jacketing to the brim even with 12/4 where you have bundled current carrying conductors. All I’m saying is heat dissipation has to do with 310 in number of conductors in a conduit, chapter 9 does not.

@ikerivers1795 4 года назад

MC cable in Industrial???? WTF....have been involved in Power Plants and other heavy Industrial Jobs my whole career (20 years). 90% of my work experience is in those environments. I have only seen coated MC cable on jobs from the early to mid 1980s. Everything else is since then is tray cable and rigid conduit down from the cable tray.

@Avocado_Gravy 4 года назад

@@ElectricianU Electrician U different places, different rules. Here they do consider the jacket a "conduit" for the purpose of bonding. I just don't think you should brush it off so easily. Lots of people come here to learn even from the start of entering the trade. They teach you it for a reason.

@Avocado_Gravy 4 года назад

@@ikerivers1795 You are inferring I was talking about Industrial when talking about 6 bundled MC. Which I wasn't. Your bad.

@ikerivers1795 4 года назад

@@Avocado_Gravy you asked a question. "Haven't been in Industrial much?" Implying that in Industrial, MC cable is used and that Dustin does not have much Industrial experience. Your bad. You asked a question, you did not make a statement.

@randymathews3348 4 года назад

Ain't even watch yet but I know I overstuffed a j box earlier. Gotta go back n add an extension

@jkpiii4513 2 года назад

Please check your code book. If you read the informational notes of Annex C in the NEC Handbook it leads you 300.17, which clearly reads... "the number and size of conductors in any raceway shall not be more than will permit dissipation of the heat and ready installation or withdrawal of the conductors without damage to the conductors or their insulation".

@kingpikachu6914 4 года назад

Lol good lucky pulling 5 three otts through any two inch 90

@Hatim.13 Год назад

Just pulled 4 300mcm + size 3 ground in 3in emt conduit, going through 2 90s and 2 offsets over the course of 150ft, was hard as fuck

@olliedgk 4 года назад

Nearly first, next time. Love the videos man, inspiration for an apprentice starting the trade

@jeremyrodriguez5923 4 года назад

Ollie Wilkes agreed

@scottsullivan4533 4 года назад

Conduit fill CAN lead to too much heat. Heat can cause a "You name it" list of problems in electrical systems. I have seen it personally on more than one occasion. Remember, 9 current carrying conductors or less to avoid derating the conductor amperage heavily.

@jontopham2742 2 года назад

That's not conduit fill, that's adjustment for multiple current carting conductors in a raceway

@jkpiii4513 2 года назад

@@jontopham2742 Read Article 300.17. In the NEC Handbook, both chapter 9 and annex C refers you to that article.

@ryantrahan8687 2 года назад

@@jontopham2742 conduit fill is almost useless because of derating, besides 60% fill on nipples with no derating

@oscar27ization 4 года назад

Good job man, you’re good at explaining

@andyponcia7722 2 года назад

Is a neutral wire and or ground considered a conductor as far as conduct fill is concerned?

@RjMacProductions 2 года назад

I was wondering if Neutral and Ground are included in the Conduit Fill calculation as well...?

@Tholmes8913 4 года назад

I literally just took a test on this Monday lol It was a third year Apprentice test but they moved it to second year. I appreciate the additional clarification!

@JeffSwal 3 года назад

NO ONE SAID THERE WOULD BE MATH!!! Great stuff. Thanks for sharing.

@Sembazuru Год назад

Not only math, but ALGEBRA!!! Oh, the horrors! 😆

@anthonyortiz2727 3 года назад

Great video Dustin! Thanks for taking time to teach us this stuff... I learn more from you then I do it trade school haha

@james77011 2 года назад

At time 10:48 what ulgy book is that u have ? I have looked online and seen many different ones..

@TerminusOmega13 2 года назад

Non-electrician here, but watching the channel to START my education because I plan to re-wire my house in a few years. Looking in my basement, I see a few tubes of 1/2' NMT filled with Romex along the walls. Some have one, others have two. Is Romex, when still fully sheathed, considered one conductor or still considered multiple? In either case, I feel these conduits are overfilled.

@77Sumdumguy 4 года назад

I keep my ugly's in the hard case i keep my meters in.

@MasterTheNEC 4 года назад

A few points. 1) heat is a factor in raceway fill since mutual heating becomes an issue. There are Performance and Prescriptive Requirements and the prescriptive requirements that demand the maximum fill are to also help satisfy the performance requirements so as to not damage the thermal properties of the insulation. 2) Yes, another key factor is indeed reducing the potential for damage during the installation. Remember, that Informative Annex C is only for raceway fill as a short cut when ALL the conductors are the same size, it doesn't reference heat simply because it is again simply giving users as a shortcut method to maximum fill if all the rules are adhered to. Back to heating, just because the values of 310.15(B)(2)(a) and 310.15(B)(3)(a) appear to have no relationship to raceway fill they do when ampacity is involved and the perfect world of 310.15(B)(16), such as more than 3 current-carrying conductors are encountered. The annular space that is also maintained helps to allow heat dissipation, not removal. Just some thoughts to share. Now, if the heat was not involved AT ALL then why do you think nipples allow fill allowances to he up to 60%, it is due to the limited length and availability of enhanced heat dissipation. Clearly, the reduced nipple length is not an installation damage concern during the installation. Point is they all work together in a Performance and Prescriptive method by using all areas of the NEC.

@ElectricianU 4 года назад

Master The NEC I’m not disagreeing with any of that, I’m saying that is the reason we use temperature and correction factors for sizing the conductors, not for sizing conduit. And nipples have 2 benefits according to Ch 9 Tbl 1 - no derating for ambient or bundling because of this heat dissipation you talk about and 2 adding more conductors because of physical damage being a lot less likely. The heat and the size are two different things. My argument is that sizing raceways doesn’t require knowledge of heat dissipation, only size of conductors. Head dissipation is dealt with when sizing conductors.

@MasterTheNEC 4 года назад

I can agree if sizing is your only goal physically and based on the title of the video that was your goal. However, I felt it was important historically to understanding WHY we size and how it still linked to the thermal effects of sizing. Ultimatly we could care shitless about size except it links us to the detriment of the wire and its ability to safely and efficiently carry current. The dog wags the tail....We worry about raceway sizes with the knowledge that it helps achieve a performance goal of not damaging the conductors. They work in harmony. Now, if the only goal was to size in the video then no worries but saying heat and mutual heating plays no historical linkage is inaccurate in my opinion. But, Yes I conceded that of sizing is your only focus of the lesson then goal achieved. Hopefully, you did mention Annex C only applies to 40% fill and if all the conductors are the same insulation type and size but I am sure you did my friend.

@KevinCoop1 4 года назад

Electrician U Dustin, So after all of that, follow what you showed in your video and all is good!

@MasterTheNEC 4 года назад

My points were not to criticize Dustin. It was to elaborate on some points. The core raceway fill components are spot on and Dustin knows I would never do that.

@ElectricianU 4 года назад

Master The NEC thanks for sharing, again I do believe mutual hearing and energy dissipation are indeed things that happen. What I don’t believe is that the 40% fill was created for heat dissipation. I believe 310 was created for heat dissipation, ch9 was created for fitting conductors in conduit. That’s actually ALL I’m saying.

@kkalafus Год назад

I was told that there would be no math.

@juanzamarripa3133 5 месяцев назад

You were lied to!😂

@theodoreroberts3407 4 года назад

I'm listening because you're teaching me. Thank you.

@Prariedog 3 года назад

Great video , I have a question What size conduit for 12-2 wire What size conduit for 10-3 wire ,and should the jacket be stripped off ? Thanks for your time

@_B_K_ Год назад

Why does Table C.1 not have values for majority of 3/4 conduit types?

@pld8993 3 месяца назад

C.1 is for EMT only. Other C tables address other conduit types.

@RadDadisRad 4 года назад

Pack them full. Waste not want not.

@etdaley 2 года назад

What area is used when running romex in a conduit?

@colinstu 4 года назад

I think the other reasoning behind it is that conductors expand/contract depending on ambient temperature (especially in unconditioned spaces, or if buried). If conduit was crammed full during the winter for example, and all the conductors expand during the summer, it's possible they could get damaged somehow. But yeah biggest one is probably just for sake of pulling conduit and the jacket not getting destroyed.

@codyw7554 2 года назад

Actually you just touched on an issue that Los Angeles had years ago with the wires rubbing on the conduit as they heat and cool with load and season. In that situation it was something like 200,000KV not residential but same general principal applies.

@robertogonzalez7200 3 года назад

Great explanation, better than many teachers I know. You are a good communicator.

@Batman-nf4nn Год назад

Hi, looking at this, something does not add up, for instance, table say only 8 THHN conductors/wires are allowed in a 1/2 " PVC sch40 conduit, right ? , but you are supposed to be able to use 40% of the conduit cross section area, if you do the math, 8 wires is only about 16% of the cross section, so what is right ?? Well, my dimension were wrong, so 8 wires 12 gauge take 31.26 to 33.8 % (depending on sizes of both pipe and wire) , so now makes sense, if sizes/dimensions are wrong the math won't make sense. And actually I put only 6 scrap pieces of wires to see how they would look in the pipe, and it look crowded, so 8 is enough, and pulling them in curves etc, might not be easy, so the code makes sense. 😂😂

@ghusttler 3 года назад

Bro I really like your videos, Everytime I need to know something new For the new type of job I’m doing it’s everything related to low-voltage. Much of your videos always come handy to me Thank you for doing all of this and thank you for all of your time Invested here

@briangoodale7167 Год назад

Good video BUT the NEC will argue with you about derating of conductors and the AHJ may make you change them if not factored correctly. Derating the size has to be applied when running more than 3 current carrying conductors in a conduit. This is why is makes more sense to run smaller conduits like 3/4" with less conductors because it's not economical to upsize the wire when you fill a larger conduit with more conductors & the wire size needs to be increased due to derating. This is one subject that is always argued upon in the field. Wish the NEC would clear it up better. Other factors to consider are ambient temps say in a boiler room that has temps above 86 deg F. Also the termination lug rating of equipment can dictate what rating of wire amp table you can apply. Say your breaker lug has a rating of 75 c you can't use the 90c amperage table for wire size. I advise Apprentices to dig a bit deeper & check several opinions from RU-vid & Google for you answers. On another thought the factories I've worked in over the years have plenty conduits overfilled with general purpose branch circuits, not that it's right but they operate fine. You really need to be careful when running heavy amperage circuits like motor loads ect in the same conduit. I don't claim to be an expert but have 40+ years experience.

@chasebeebe3671 Год назад

This is true. I’m a journeyman in Dallas and do industrial and commercial and inspectors are actively asking about de rating and checking out conduits with more than 3 current carrying conductors and making sure we upsized accordingly. They don’t always check but I always de rate all of my conductors just in case. Usually this leads to multiple small conduits being ran as opposed to less amounts of bigger conduits because we avoid upsizing the wires to much because of the original bid cost

@ourleopardtortoises6543 3 года назад

Great job explaining thank you can you send one your cool t-shirt im Mari it's my 3 year apprentice electrician and I always ask guys at work about wires how many wires can feed through EMT 2" 3" 4" I think they don't have no clue or they're jealous cause I'm women. Thumbs up actually right now I'm read NEC 2021 book.

@lastresort1460 2 года назад

which code book are you referring to? Maybe i missed it ..

@qixu3208 5 месяцев назад

310.122

@garretjacksgreenlightsgami3912 4 года назад

Hey boss man i came across your videos a few weeks ago and im really excited about starting out in learning this trade . Im 32 married with three children , iv always done blue collar work my whole life, such a- yard care -tree care -a little bit of remodeling-alot of painting -and framing new construction, any way i never graduated or got a GED , but i feel like the electrician trade would be a good fit for me and my body , i was in a very bad vehicle wreck three years ago. I broke my back and neck , some ribs and my left collarbone, im back at well 85% i feal like your a strait shooter , id like to hear your thoughts on starting my apprenticeship for the electrician trade, and would anyone even look my way to train me , would love to hear from ya brother , no sugar coating on your opinion 👊.

@introvertelectrician17 4 года назад

GarretJacks Green lights Gaming I am a one year apprentice at 30 years old. Also we have a guy working with us who has no experience 45 years old three kids and work nights at his second job moving furniture but after 25 he said he needed a career. In five years if you start today you’ll be a journeyman and have your license before 40.

@BryanMullins 4 года назад

I pulled a “career change” last year at 40yrs old. Don’t let them get you down. Get that apprenticeship, make those grades, learn those skills. Earn that pay.⚡️🤘⚡️

@VishalRaoOnYouTube Месяц назад

I asked ChatGPT 4o "So I have a 4-aug wire, a black one. I have a red 4-aug wire and a green 8-aug wire. According to the National Electric Code of 2020, in terms of conduit fill, am I under code if I use a Schedule 40 1-inch conduit?" It answered me: "To determine if your wire setup is within the code for conduit fill according to the 2020 National Electrical Code (NEC), we need to refer to NEC Chapter 9, Table 5 for the wire dimensions and Table 4 for the conduit fill capacities. Here's the step-by-step process: 1. **Determine the cross-sectional areas of the wires:** - For 4 AWG wire (both black and red): - THHN/THWN insulation has an approximate area of 0.0837 square inches each. - For 8 AWG wire (green): - THHN/THWN insulation has an approximate area of 0.0366 square inches. 2. **Sum the areas of the wires:** \[ \text{Total Area} = (2 \times 0.0837) + 0.0366 = 0.204 \text{ square inches} \] 3. **Check the fill capacity for Schedule 40 1-inch conduit:** - According to NEC Chapter 9, Table 4, the maximum fill for a 1-inch Schedule 40 PVC conduit is 0.346 square inches (40% fill for three or more conductors). Since the total area of your wires (0.204 square inches) is less than the allowable fill capacity (0.346 square inches), you are within the code for conduit fill using a 1-inch Schedule 40 conduit. Therefore, using a Schedule 40 1-inch conduit for your specified wires is compliant with the 2020 NEC code." What a genius!

@rezzle2457 2 года назад

Do grounding wires count in conduit fill?

@RjMacProductions 2 года назад

I was wondering if those are included in the Conduit Fill calculation as well...?

@COFFEE23409 4 года назад

Does the 40% rule apply to low voltage/POE? Every low voltage conduit I’ve ever worked with was stuffed.

@thatguy9045 4 года назад

I work in low voltage now and it seems like you just lube up as many cables as it takes to max out the emt.

@COFFEE23409 4 года назад

Same here. I’m guilty of that

@jacobmillyard6799 4 года назад

I believe BISCI standards have you follow NEC requirements for fill.

@fr33for3 Год назад

I would give this 1000 thumbs up if I could.. Best explanation out there. Thank you!

@andycopeland7051 3 года назад

Commercial and industrial electrician here to say I also follow the other EU: the Expanded Universe

@christopherjackson7722 3 года назад

Hey refresh my memory of what does t hhn stand for

@RjMacProductions 2 года назад

Are Neutral and Ground included in the Conduit Fill calculation as well?

@michaelking42 Год назад

What a fantastic video, thank you so much! Very timely indeed as I'm running wires to my workshop about 140' away from my switchboard. Wasn't sure if I could get 4 x 4AWG wires in a 1" conduit, but yes I can.

@TheTruthSeeker235 4 года назад

As a professional electrical engineer I found this video helpful. I've taken my fair share of academic courses and certifications and there is so much information to remember its insane. I have to do fill and bend radius calculations on a daily basis so i tend to forget some of the other useful pieces of code in the NEC.

@400080vikkash 4 года назад

You guys really need some on the field training for sure. All the new engineers we deal with just don't get that, hey I can't mount a can light light on a solid steel stud or what I'm saying is learn how stuff gets ran and what Electricians have to deal with. It'll help us lots for sure. And other way around

@djaztec97 2 года назад

Hey man! EE here who has to know the trade and code rules. What's your field?

@nayivisdenis1401 2 года назад

when we use the conduit fill ,we need to look the ampacity ruler, even the journeyman electrician forget that ruler!!!!!!!casanova EC miami

@sambromley7394 4 года назад

I wish my employer paid attention to conduit fill. Alas Nevada inspectors could care less about shit like this.

@BRGR1989 5 месяцев назад

Can you run 6/3 Romex in EMT conduit (3/4 inch)? Thanks! PS, it will be used inside a garage.

@ziaride 4 года назад

Contractor who installed power at the building I work in must have failed this. 40MW was installed but we can only safely draw 20MW due to overheating in the conduit. Major ($millions) oops.

@goaliedude32 3 года назад

Were they held responsible for it? You should run the building at 40MW and let the wires melt and force them to fix it. Or just legally force their hand

@KevinCoop1 4 года назад

Dustin, Very good video! A couple finer points. The conductor areas listed in the tables are information based on Southwire. Exception allows you to use manufacturers information for specific conductors. Also, somewhere in the back it says that at 40.5% you can round down. I'm sure you can guess how I found this out after designing electrical for 35 years. I needed both to be legal. Very respectfully, Kevin

@TwilightxKnight13 Год назад

Just to be clear, when he says "area", he is talking about the cross-sectional area of the conductor. That should be common sense, but I have seen apprentices misunderstand what we are talking about if we only say area

@stevebuchanan5773 4 года назад

This is great info and have had to use this plenty of times but is only good for maybe control wire. I don't get this chart because of the derating factor chart. See if your inspector passes you with 16 #12 in a 3/4" emt for branch circuits. Also i think the derating chart should be for continuous loads . Or at least some type of residential exemption.

@elvizhernandez4305 4 года назад

2nd yr apprentice here , You should make a video of what you tab out on your uglys book, like to point out the info that you use the most. 👌🏽 love the channel.

@markm_koko Год назад

Everything is cool, it's just that you do not say "inches squared", it's "square inches"..

@abdulelkhatib2674 3 года назад

When people say we can't fill conduit because of heat I say the conductors should be properly sized and shouldn't be heating up that doesn't sound right.

@nazgullinux6601 2 года назад

Spoke to the crew in the safety meeting about nipples and used a slide show with clear pictures for examples. They were all eyes and ears during the meeting. Well... they were at least all eyes.

@Tagerrun 2 года назад

There’s no where near enough air flowing over those wires to dissipate heat. You’d need a fan blowing individually into each pipe to even drop it a few degrees. So dumb that people think you need an air gap to stop the wires over heating.

@feeldennis 4 года назад

If you are protecting the insulation of the cables dont you consider the cross sectional area of the cable ( to outer insulation ) and determine the 40% of the conduit ? rather than just the CS of the conductor.

@Sembazuru Год назад

I don't have an NEC book, nor ever studied one. But my guess is because the table for cross sectional area of "conductors" would also take into account the insulation. My reasoning for this is each type of cable has its own section in the table. A bare conductor is just copper (or aluminum) and wouldn't need all of those categories. I've noticed through watching lots of these videos that tradespeople seem to call a cable a "conductor" (which is why I used quotation marks, above). It seems inaccurate to me (electronics trained), but might just be trade jargon.

@tikigodsrule2317 3 года назад

I would like input on a conduit question. People putting NM in conduit. My first reaction is no you can't put NM in conduit but.. I have also heard there is nothing in the NEC code that says you can't. The thermal characteristics are different between single vs a bundle of wires so you do have to oversize the conduit compared to a bundle of single wires. If you feel like commenting please tell me where in the NEC book it's covered. Great video thanks

@tikigodsrule2317 3 года назад

Answered my own question: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-j9A_xg3B1Kg.html Yes you can.

@zekeleonard 3 года назад

Nice work. You are a good teacher, and this video is clear and super useful.

@icevariable9600 2 года назад

Excellent video. Highly informative. Can't praise it enough. Great job in explaining how conduit fill works. I've been dreading learning it and you made it incredibly simple. Thanks.

@Aquemini-ug1co 4 года назад

Man your f;/(ing AWESOME. Keep up the good information it’s really appreciated by someone like myself

@shorty430551 2 месяца назад

I don't know why RU-vid is so interested in showing me old conduit fill videos this is the third this week, but f it here's a copy pasta of my post from one of those other videos. This is a section of code that really irritates me at least for branch circuits. Don't get me wrong it's necessary for calculating the size pipe you need for large conductors and special cases like isolated grounds. However, after you have applied corrections for ampacity the actual practical limit is 9 current carrying conductors (#10's on a 20A circuits) anything more and the step up in wire size becomes impractical, who's going to pull #8 (THHN) for a 20A circuit? Plus you then have to upsize the conduit from 3/4 min. to 1-1/4 for up to 16 or 1-1/2 to 20 the pipe can handle 22 correction step up is at 20. I can't say you'll never do any of this, but seriously this section is mostly navel-gazing at best and leads to bad installs that could end up in dangerous situations and worst.

@pld8993 2 месяца назад

True, 9 is the practical limit for most branch circuit wiring but the rules need to apply to more than basic branch circuits. More than 9 is done all the time once you leave the comfort of residential and light commercial wiring, especially control wiring. FYI, even at 9 conductors 14, 12, and 10 are still on 15, 20, and 30 amp breakers, respectively. Usually no need to upsize until you hit 10 conductors.

@stevenseebach375 Год назад

Hi my name is Steve. Can I have a T shirt. I'm number 1 fan from USA.

@mancave7 9 месяцев назад

Ok Gurus, DIY with simple scenario, need advice. 3 circuits, 15A max each 24ft run (panel to receptacle) Dry location, under a carport, 8 ft above ground Can 12/2 Romex be used in 1 1/2 PVC conduit?

@pld8993 3 месяца назад

Under a carport is outdoors, damp location, NM (romex) not allowed.

@Midnightdragon9 8 месяцев назад

seven number12 cable in a 3/4 in. tubing is that normal ?

@douglaswoeckener1904 3 месяца назад

Can a conduit house both AC and DC... Example. 3 12 gauge wire for outlets in a shed and DC solar panel wires coming back from the shed to the basement. Is something like that allowed

@pld8993 3 месяца назад

Yes, as long as all conductors have insulation rated for the highest voltage in the conduit.

@Winged1212 4 года назад

So how many conductors allowed vs how many current carrying conductors are allowed - the difference are ground wires?

@wim0104 4 года назад

yes, there's a limit to how many live conductors you're allowed to run together.

@carultch 4 года назад

The conduit fill factor calculation is about the mechanical limitations of practically pulling conductors through the raceway. It doesn't "care" what these conductors are for, it only cares about what fits and is practical to pull. The calculation that "cares" what conductors are current-carrying, is the ampacity adjustment calculation, formerly known as derating. Grounding conductors never count in this calculation. Neutral may or may not count, depending on the specifics. Ungrounded conductors most often will always count, but the one exception is conductors that can't be energized at the same time, like three way switch travellers.

@alexfaylona4007 2 года назад

Im thinking of installing 1/2 pvc conduit using 12/2 romex adding outlets inside my garage. Is that doable??? Can i sometimes put 2 romex in that 1/2 pvc conduit?

@ElectricianU 2 года назад

It would be much easier if you just ran THHN or THWN as then you wouldn't need the bushing for Category cable or Nm-b

@hawkwind769 4 года назад

Yo! I just thought of content video... Maybe? How your label and organized your NEC. Looks very organized, I don't know where to begin 😭

@mike.3727 4 года назад

Do you have those NEC tabs? They sell em on amazon for about $18-$20. Thats a start. They have those color coded ones which makes it easier to find something specific.

@mike.3727 4 года назад

As for highlighting and all of that yeah he should make a video on that lol

@hawkwind769 4 года назад

@@mike.3727 I'll look into it.

@ElectricianU 4 года назад

I’ve been thinking about one on highlighting and layout. That’s a great suggestion I just added it to the list - thank u!

@hawkwind769 4 года назад

@@ElectricianU cool! I look forward to it! Although, the NEC quarter is almost up. Next is ac theory.

@stargazer2504 Год назад

"I have nipples Greg. Do you need to de-rate me?"

@bartosullivan8050 4 года назад

Very informative. Exactly why I leave almost all electrical to the pros.

@lawmat93 4 года назад

Thank you for these videos a lot of the ones getting me through the industrial side are people with accents I can’t understand outside of the states and your content is clear and you use common language again thanks man

@aslmx1918 4 года назад

Google and conduit fill apps makes this so much easier now a days.

@Ephesians-ts8ze 4 года назад

Yep, the conduit fill apps are pretty handy! I use them frequently on the job. I also think it’s important for apprentices to learn how to use the code book and a calculator to do it the old school way first before they ever download an app to rely on. Perfect example...I had a wire pull recently that seemed like too many conductors for the conduit size so I plugged in the numbers on my app. It showed over 40%. I brought it to the general foreman’s attention and he plugged in the numbers on the conduit fill app pre-installed on his company issued iPad and showed less than 40%. I felt a little defeated at first but I pulled out my code book after work and did the math. Turns out my app was right and his was wrong.

@Busybee77768 2 года назад

It’s very hard to listen to Dustin sometimes. How is conduit fill not a purpose to dissipate heat?? And why is this labeled “for the modern electrician” lol

@ElectricianU 2 года назад

Have you ever grabbed a bunch of conductors coming out of a conduit and felt them dangerously hot? Not unless there's a problem with a load or termination. Conductors in ambient heat experience more insulation-damaging heating from the outside, most times, than internal heating from current on properly sized conductors. Again...depends on the load and environment though. The purpose for conduit fill is to ensure we're not damaging conductors during pulling in and out. Do you think adding 2 more conductors inside a conduit is going to all the sudden add such an immense amount of heat inside the conduit that the insulation of the conductors is going to start to melt - therefore requiring us to need to upsize the conduit? No. If that is the case the conductors are probably sized too small for the loads to begin with. Also the title was suggested by RU-vid so we just went with what it suggested. Realizing it's silly as hell as I sit here now and read it lol...Cant change it though or the YT gods will slap us down.

@chuyatlanta3588 3 года назад

How many current carrying conductors can go in a 3/4 emt

@ryananthony4840 2 года назад

Just started watching but the title made me think of something I come across...... Most guys don't know that more than 6 current carrying conductors you must derate

@davidgagnon2849 2 года назад

Please explain and tell us where to find that in 2020 NEC.

@heroknaderi 3 года назад

Great information. I’m curious I just got a 2 in conduit for a sub panel feed and I noticed the knockout fits up to 1 1/2 in. So my question is can I use an adapter that fits the KO that would still accommodate a 2 in conduit. I appreciate any advice 😎👍

@andycopeland7051 3 года назад

You need a knockout kit. That's the easiest thing in the long run

@mikenormandy9250 2 года назад

You need a Knockout kit (there is a hand pump one that is oil filled or Milwaukee makes a battery powered one but if you are just doing this one time (hopefully you have more experience if you are running conduit to your sub panel) get a Hole Saw that will fit a 2" conduit, I believe it's at least 2 1/4" or 2 3/8" size hole saw (as you need a hole saw big enough for the outside diameter of the pipe) so it has to be bigger than 2"....

@richardleesparks6694 19 дней назад

I know you posted this video a while ago, but I just want to thank you again for making these videos. They're very helpful, reiterative, and educational. Cheers from Michigan!

@morgan79347 3 месяца назад

I’ve watched a few of your videos & stumbled on this one. I don’t do a lot of electrical anymore but I’m building a large shed for my woodworking equipment. This conduit episode is perfect as I need to run about 100’ of 1/0 Thhn Thwn 2 for a sub panel.Also thanks for the ugly’s book have one on order. I also just subscribed as I believe you channel is awesome.

@morgan79347 3 месяца назад

@carlosalvarez-ek9ll 4 года назад

The code it’s not an instruction manual nor a study guide. Go to 310.1(B)(3)(A) and you will find that’s grouping the conductor has to apply adjustment factor to prevent the wires from over heating.

@MarkytheSparky 4 года назад

Awesome breakdown of information for newbs. I love the full breakdown of calculations.

@peacockhorsepower1765 Год назад

its all about size...conduit size queen

@Sembazuru Год назад

What is the difference between nipples and conduit? Is it just the length (9.0(4) seems to indicate 600mm (24in) is a qualification characteristic), or are there other different characteristics between nipples and conduits? Are you allowed to have bends in a nipple (like, a jog to connect misaligned holes on two electrical boxes), or once you put a bend in a nipple does it become a conduit?

@mchenj Год назад

Kind of in the weeds a bit more, but when filling conduit with multiple branch circuits, do you try to even out which line (120/240 split phase) the branch circuits are supplied by, if running hot and neutrals in separate conduits? Ex: 8 conductors, 4 branch circuits, if all on line 1 supply, would increase mutual inductance in both the conductors and any EMT/Liquidtight metallic. This would increase your eddy currents, reducing your ampacity margin, right? Or is this just not a big enough impact to consider?

@alexanderibarra8787 4 года назад

300.17 Number and Size of Conductors in Raceway. The number and size of conductors in any raceway shall not be more than will permit dissipation of the heat and ready installation or withdrawal of the conductors without damage to the conductors or to their insulation.

@hawkwind769 4 года назад

I'm in trade school and have an exam coming up Friday, on box fill calculations, conduit fill... Fuck I'm anxious 🤷🏼‍♂️

@syntheticsol 4 года назад

Thank you. Glad you covered this, my friend.

@Perez4 3 года назад

Why does my 17' code book say for 3/0 I can get 6 conductors but your book says 5? I doubled, triple checked over this and it's different than your book. It states that with 4/0 I can get 5 conductors in 2 inch conduit.

@alvilla701 3 года назад

Lol, I just got the AGLY'S book like 5 hours ago, I thought it was the right time cause I am almost finish with WIRING SIMPLIFIED book (I like that one too), happy to know that according with you i did good getting this book, is there another book you think I should read next?

@jasonstarr6419 3 года назад

Honestly, the internet is scaring me. I'm looking toward relocating (or having it done) my main panel and meter and upgrading from the currently existing two panels (one in the main house and one in the semi-detached former two car garage/previous owner's workshop) to those two plus three more panels: one in the "pool house", one in the tool shed/workshop, and one in the "barn." I was thinking about duct banks and what size conduit I'd need to run the feeds underground for all three panels (since the closest is about 100 feet, the next one at about 125 and the third at about 185 feet). I mean, I thought it, and whoa, here's a video talking about it. scary.

@heroknaderi 4 года назад

Thanks I appreciate it 👍😎

@bb55555555 2 года назад

Someone please explain to me why you would want to put more than one romex wire through a single tube of conduit. Obviously this section of the code is there because people do it but I can’t understand what circumstance that would be necessary. Why not just run more conduit or split it off with a junction box?

@TheSilverlocks Год назад

chapter 9 of WHAT book???

@Lolablue1986 4 месяца назад

Hey, I put that orange 10-3 Romex into a half inch conduit that was in direct sunlight. is that safe? Say it's 105°

@pld8993 3 месяца назад

10-3 NM cannot be used outdoors in conduit and if it's a complete conduit system (box to box) as opposed to a sleeve, 1/2" emt is too small for 10-3.

@Lolablue1986 3 месяца назад

@@pld8993 thank you

@tolydukhovny682 Год назад

i am completing the design for the full electrical remodeling of the warehouse. i've devised the calculator for the conduit fill check. dustin, if yopu are interested, let me know. the program is fast and accurate, and the data is taken from the "uglly's". thanks for the video and for your channel. toly

@jackriley5974 3 года назад

Takes as long to figure as it does to pull them. Heat dissipation in a conduit, maybe? Limiting two wires in a drilled hole is pure bullshit! Why aren't breakers sized to prevent a wire from overheating??

@eduardovance524 3 месяца назад

I just like man!! I love having you as my electrical teacher . Keep up the good work!!

@williamwells1862 2 года назад

Show me the wires and conduit.

@rongriffiths6138 2 года назад

How do you remove conductors that was pulled pulled in PVC 43 years ago using Yellow 77?

@HuntBCWild 3 года назад

In Canada you have to de rate the amps for wire sizing based on how many conductors in a pipe. So I guess in Canada they include heat as reason for conduit fill. I.E if 7 conduits in a pipe you got to use a 10g for 20a pull. (Not exact just an example)

@elBusDriverKC 4 года назад

I came looking for big wire porn..... got math instead..... haha. But really, this is good stuff, things that often get overlooked. Most electricians I've worked along side go with the (how much is too much to pull) measurement style. Or the, "I'm not going to add more conduit so get the damn thing in there" style of measurement.

@draaks1 2 года назад

I have to say I disagree on the conduit fill doesn't apply to heat argument. While the damaging of the insulation while pulling is probably more pertinent to the conduit fill, it is still relevant to think about heat. The more conductors in a a conduit the more heat (wattage/resistance) per length and therefore the more likely insulation may breakdown. Either way we are worried about the insulation breaking down and potential shorts between conductors.