1 00:00:06,440 --> 00:00:37,359 Paul ask alright, alright, alright, alright, alright, that's enough of 2 00:00:37,399 --> 00:00:40,640 that. Hey, everybody, welcome to the podcast. My name is Paul 3 00:00:40,640 --> 00:00:45,000 Abernathy, your host, and welcome to the Let's Ask Paul podcast, where 4 00:00:45,039 --> 00:00:50,320 you submit questions to me about the National Electrical Code. And of course you 5 00:00:50,320 --> 00:00:56,119 can do that free of charge. That's right, even Paul said it free 6 00:00:56,159 --> 00:01:00,560 of charge by going to Paul Abernathy dot com. Now that is our unique 7 00:01:00,600 --> 00:01:06,560 portal that's sponsored by WIS where you can submit your question to us and it 8 00:01:06,640 --> 00:01:11,040 will come to me directly and I will answer it either in an email or 9 00:01:11,560 --> 00:01:19,120 if selected an upcoming podcast. Also, remember that starting on June twenty eighth, 10 00:01:19,560 --> 00:01:23,200 twenty twenty three, that we're going to be doing a new live streaming 11 00:01:23,200 --> 00:01:30,519 show every Wednesday night at seven thirty pm Central Time on all of your favorite 12 00:01:30,560 --> 00:01:36,959 social media channels that we're connected to, like our LinkedIn, our facebooks, 13 00:01:37,000 --> 00:01:42,680 our Twitter, Twitch, over on Rumble. It'll be on YouTube, all 14 00:01:42,719 --> 00:01:48,560 of those and basically anywhere. You just look for Master the NBC and you'll 15 00:01:48,560 --> 00:01:52,799 see us. If you're already following us on all of your normal platforms from 16 00:01:52,840 --> 00:01:56,920 YouTube down to Facebook. And guess what it'll be streamed there. If you 17 00:01:56,959 --> 00:02:00,959 want to watch it on our unique platform that is growing rapidly every day, 18 00:02:01,040 --> 00:02:04,640 then you can go actually watch it. You don't even have to sign up, 19 00:02:04,680 --> 00:02:09,199 although I wish you would. Over on fast tracks Tube that's fast t 20 00:02:09,400 --> 00:02:15,759 r a x tube dot com. You can listen to our show there and 21 00:02:15,919 --> 00:02:17,800 watch it for free. You don't even have to be a member, but 22 00:02:17,879 --> 00:02:22,319 we would think you it behooves you to become a member, and if you 23 00:02:22,520 --> 00:02:27,360 use a coupon code twenty five o F at checkout, you'll get twenty five 24 00:02:27,400 --> 00:02:30,759 dollars off your annual subscription and it's a great way to say thank you for 25 00:02:30,960 --> 00:02:32,879 all of the stuff that we try to provide for you. So again, 26 00:02:32,919 --> 00:02:36,639 if you're insted there, that's where all of our videos are going to be 27 00:02:36,800 --> 00:02:40,159 moving forward with the twenty twenty three, all of the exclusive stuff will only 28 00:02:40,199 --> 00:02:47,199 be there, So make sure you're there or be square. Okay, A 29 00:02:47,319 --> 00:02:51,439 right, folks, We have a great show fee tonight. We are going 30 00:02:51,560 --> 00:02:54,080 to be looking at a question two questions that were submitted through the portal, 31 00:02:54,599 --> 00:02:59,800 and I think they're beneficial for everybody because again, sometimes some of the easiest 32 00:02:59,840 --> 00:03:05,080 things that we think about can cause confusion, and my goal is to take 33 00:03:05,159 --> 00:03:08,560 something that is complicated for folks and try to make it as easy as it 34 00:03:08,639 --> 00:03:13,280 can be. That's why people come back and listen to our podcasts over and 35 00:03:13,360 --> 00:03:16,759 over. That's why people watch our videos, and this is kind of why 36 00:03:16,879 --> 00:03:21,000 we do what we do and our fast Tracks program. If you're not a 37 00:03:21,080 --> 00:03:25,639 fast Track student, our fast Track program is a structured learning program to teach 38 00:03:25,639 --> 00:03:30,000 you the National Electrical Code from the very beginning to the very end. We'd 39 00:03:30,039 --> 00:03:34,800 like to say, cradle to grave all about the NC how to maneuver it. 40 00:03:35,199 --> 00:03:37,919 And then of course you can join us on the Wednesday nights that are 41 00:03:37,919 --> 00:03:39,479 going to be streaming live on June twenty eighth, and you'll just get so 42 00:03:39,680 --> 00:03:44,520 much more. They work together as a package. It's just an amazing thing. 43 00:03:44,639 --> 00:03:47,719 If you're one more information of becoming a fast Track student and supporting us 44 00:03:47,960 --> 00:03:53,400 while we help you grow, then just go to fast tracks system dot com. 45 00:03:53,639 --> 00:04:00,080 That's fast t r a x system dot com and you'll get more than 46 00:04:00,199 --> 00:04:03,680 enough information. Watch some of the demos and you'll really get a better understanding 47 00:04:03,960 --> 00:04:08,199 on what the course is all about. All right, let's get into the 48 00:04:08,319 --> 00:04:11,400 night's episode. So we have a question that was submitted through the portal, 49 00:04:12,039 --> 00:04:14,719 and I'm going to tell you up front, I looked at this question and 50 00:04:14,960 --> 00:04:16,959 there's some stuff missing. So whoever wrote this question, let me give you 51 00:04:17,040 --> 00:04:19,720 some advice, and I want to answer your question. I'm gonna do my 52 00:04:19,879 --> 00:04:25,920 best, but there are so many variables that come into play here, and 53 00:04:26,000 --> 00:04:29,959 you're not giving all of the information. So what happens is people come out 54 00:04:30,000 --> 00:04:36,120 of a test and they aren't They can't really remember everything that was on the 55 00:04:36,319 --> 00:04:42,279 question. They only remember pieces of it, and then they try to regurgitate 56 00:04:42,360 --> 00:04:45,959 it and it's really hard, and sometimes it does you a disservice by trying 57 00:04:46,040 --> 00:04:50,319 to get into your head because if you leave some of the information off, 58 00:04:50,399 --> 00:04:55,639 it can totally change the answer. So let me go and read the question 59 00:04:55,759 --> 00:04:59,720 and you'll kind of see that there's some information that is lacking here. But 60 00:05:00,079 --> 00:05:01,519 do our best to try to dissect something for you, at least give you 61 00:05:01,600 --> 00:05:04,279 direction. How about that, because I want to give you some direction in 62 00:05:04,360 --> 00:05:08,160 here. So okay, it says here's my question. It says, hello, 63 00:05:08,600 --> 00:05:12,319 I had a question on my code test and I failed. It said 64 00:05:12,399 --> 00:05:18,120 the sixty five amps seventy five degree fahrenheit ten six THW the maximum demand factor 65 00:05:18,439 --> 00:05:23,920 is question mark and says if that makes sense, I can't figure it out. 66 00:05:24,160 --> 00:05:27,759 What video do I watch? Thinks, okay, well, the first 67 00:05:27,800 --> 00:05:31,360 thing here is you've got some information missing. Now we get it. You 68 00:05:31,439 --> 00:05:38,079 said sixty five amps seventy five degree fahrenheit, but typically sixty five amps for 69 00:05:38,160 --> 00:05:41,879 the six gage is what you're asking about is going to be under the seventy 70 00:05:41,920 --> 00:05:46,199 five degree C column, right, So that's typically the first thing. Now, 71 00:05:46,240 --> 00:05:49,879 you didn't give a condition of use, whether it's a wet or dry 72 00:05:50,000 --> 00:05:57,680 because THHW is listed under both seventy five and ninety, so you didn't really 73 00:05:57,720 --> 00:06:00,560 give us the condition. So we're gonna have to figure that that seventy five 74 00:06:00,639 --> 00:06:08,439 degrees fahrenheit is really supposed to be seventy five degrees celsius. And so we're 75 00:06:08,439 --> 00:06:13,079 going to solve this question the first way by saying, because it's only asking 76 00:06:13,199 --> 00:06:16,439 for what's the maximum demand factor? So we're going to try to solve it 77 00:06:16,480 --> 00:06:19,920 the way we think you want it to be solved. So it's sixty five 78 00:06:19,959 --> 00:06:24,920 amps. If you go to table three ten sixteen, which is the ampacity 79 00:06:25,000 --> 00:06:29,839 table in the twenty twenty edition of the National Electrical Code. You'll notice that 80 00:06:30,079 --> 00:06:32,839 under the six gage is good for sixty five amps under the seventy five degree 81 00:06:32,879 --> 00:06:39,040 column. Now, so taking out the fact that you said seventy five degrees 82 00:06:39,279 --> 00:06:44,720 F when I think you met C, we're gonna look at it from from 83 00:06:44,759 --> 00:06:48,000 that perspective as if you're just talking at seventy five sixty five amps at seventy 84 00:06:48,040 --> 00:06:53,160 five degrees C. Okay, So now, if that's the case, that 85 00:06:53,399 --> 00:06:58,040 sixty five amp rated conductor under the seventy five degree column is going to be 86 00:06:58,199 --> 00:07:05,120 reduced in a capacity because of what's called mutual heating from all these bundled conductors. 87 00:07:05,680 --> 00:07:11,480 And so that's going to take you to Table three ten fifteen C one. 88 00:07:11,639 --> 00:07:15,839 That C is in Charlie one, and that is the adjustment factors for 89 00:07:16,000 --> 00:07:21,399 more than three current carring conductors. Now, it didn't really say in here 90 00:07:21,480 --> 00:07:26,160 that they were current carrying conductors or not, but typically these kind of questions 91 00:07:26,199 --> 00:07:29,480 are asking for that, So we're going to have to assume that it's current 92 00:07:29,519 --> 00:07:34,000 current conductors. Right, So that detail was left out, but sometimes that 93 00:07:34,199 --> 00:07:38,680 can be left out in exams. They just assume you know that they're all 94 00:07:38,720 --> 00:07:41,480 going to be carrying current, which may or may not be the case. 95 00:07:42,439 --> 00:07:46,360 But anyway, if you're doing this, it's pretty simple. If you have 96 00:07:46,639 --> 00:07:49,839 ten sixes in this raceway, and we assume it's a raceway because they didn't 97 00:07:49,879 --> 00:07:56,199 say that in the question anywhere, If I have ten six thhws in the 98 00:07:56,360 --> 00:08:00,519 raceway, then I'm going to go to and we know the impacity sixty five 99 00:08:00,560 --> 00:08:03,199 amps because of the seventy five three column in three ten sixteen the table. 100 00:08:03,920 --> 00:08:07,160 Then if you go to three ten fifteen C one, you'll notice that the 101 00:08:07,319 --> 00:08:16,279 number of conductors ten to twenty, that the percentage or basically your demand value 102 00:08:16,079 --> 00:08:20,360 is fifty percent. So that means a conductor that is sixty five amps has 103 00:08:20,439 --> 00:08:28,399 approximately half that amount of current carrying ability due to mutual heating, so it's 104 00:08:28,480 --> 00:08:31,559 thirty two point five amps. So those conductors are effectively been reduced from sixty 105 00:08:31,600 --> 00:08:37,799 five amps of current carrying ability down to thirty two point five amps of current 106 00:08:37,960 --> 00:08:43,519 carrying ability. Okay, that's what the conductor now has because of that mutual 107 00:08:43,600 --> 00:08:48,679 heating, because of the bundling, but because of the results of table three 108 00:08:48,759 --> 00:08:52,799 ten fifteen C one. Okay, So on your exam they've could have if 109 00:08:52,799 --> 00:08:58,919 they were asking you for percentages or values, then your answer would have been 110 00:08:58,000 --> 00:09:03,159 fifty percent. Okay, because that's within three ten fifteen c one for ten 111 00:09:03,759 --> 00:09:07,720 sixes and it started out at sixty five amps, but now it's good for 112 00:09:07,799 --> 00:09:11,320 thirty two point five amps each conductor. By the way, Okay, now 113 00:09:11,919 --> 00:09:16,000 let's take this in a different direction and get kind of funky with it. 114 00:09:16,759 --> 00:09:22,399 Right. If we're if this question actually said that it's sixty five amps, 115 00:09:22,000 --> 00:09:28,399 and maybe it was seventy five degree fahrenheit environment and it was ten sixes, 116 00:09:28,480 --> 00:09:33,360 well, then we have to look at it in a different, different way, 117 00:09:33,559 --> 00:09:39,360 right, because I want to have the ability to potentially use the ninety 118 00:09:39,600 --> 00:09:43,320 ampacity for my adjustment and correction. Right now, I know the amps are 119 00:09:43,399 --> 00:09:48,440 under one hundred, but the conductor is a THHW, so to verify that, 120 00:09:48,720 --> 00:09:52,000 I like to tell people, let's go on and go and look just 121 00:09:52,399 --> 00:09:56,120 so we can kind of deconstruct this, because again, not enough information was 122 00:09:56,159 --> 00:10:00,600 really given to us. But I like to like to deconstruct things. Y'all 123 00:10:00,639 --> 00:10:05,120 know that, let's go look and see what it says undertable three ten dot 124 00:10:05,240 --> 00:10:09,440 four A for THHHW. Let's just go look and see what that says. 125 00:10:09,600 --> 00:10:15,000 Okay, for those that have your codebook and you go to three ten dot 126 00:10:15,159 --> 00:10:18,960 four and you'll look at it, and you'll start to notice that when you 127 00:10:20,000 --> 00:10:22,960 just look at THHW. As I said before, there is a wet location 128 00:10:24,120 --> 00:10:28,879 rating for seventy five and there's a dry location rating for ninety. Okay, 129 00:10:30,639 --> 00:10:35,120 so this is important. Your question didn't stipulate that. So if it doesn't 130 00:10:35,120 --> 00:10:41,639 stipulate that, then then we're gonna go with the seventy five because it is 131 00:10:41,679 --> 00:10:45,519 the lesser the weaker. And of course, since you didn't give terminal limitations 132 00:10:45,600 --> 00:10:48,600 on any of the terminations, then we'll follow the rules and one ten fourteen 133 00:10:48,679 --> 00:10:52,960 C one A, and then we'll go down and say, well, since 134 00:10:54,000 --> 00:11:00,039 it is marked THHHW, then we're able to use the seventy five. So 135 00:11:00,120 --> 00:11:03,039 we follow that logic train. So that's how it got us into the seventy 136 00:11:03,080 --> 00:11:07,480 five. But nothing in your question can get me personally, can get me 137 00:11:07,559 --> 00:11:11,080 to the ninety degrees C to be able to use that value for the adjustment. 138 00:11:11,200 --> 00:11:15,279 I just can't get there. So that's why I'm locked at the seventy 139 00:11:15,320 --> 00:11:18,919 five. Okay, makes sense, right, So when looking at that I'm 140 00:11:20,000 --> 00:11:22,320 going to have to say, well, it's it's seventy five, and I 141 00:11:22,440 --> 00:11:26,360 did mind from the seventy five. Now, if it's sixty five amps and 142 00:11:26,519 --> 00:11:33,159 the ambient temperature is seventy five degrees fahrenheit, then we're going to incorporate a 143 00:11:33,360 --> 00:11:39,039 different table. Hey, we're going to be looking at and let me get 144 00:11:39,039 --> 00:11:43,279 it up on here. We're gonna be looking at three ten all right, 145 00:11:43,360 --> 00:11:45,519 hold on, let me pull it back up. We're gonna be looking at 146 00:11:45,679 --> 00:11:52,879 three ten dot fifteen B one because that is the ambient temperature correction, and 147 00:11:52,000 --> 00:11:56,679 so this says seventy five degrees fahreheit. So if we look down the fahrenheit 148 00:11:56,799 --> 00:12:05,879 scale that we see that it's sixty nine two seventy seven, and we would 149 00:12:05,919 --> 00:12:11,840 be using one point zero five as our ambient correction. Now you notice that 150 00:12:13,000 --> 00:12:16,559 means that it's below the eighty six degrees fahrenheit, which is what table three 151 00:12:16,639 --> 00:12:20,840 ten sixteen is all about. So you're actually going to get some extra amps 152 00:12:20,960 --> 00:12:26,840 because of the cooling effect. Okay, So if we did it that way, 153 00:12:26,960 --> 00:12:30,279 we'd be plugging it a little bit different. And how we would do 154 00:12:30,399 --> 00:12:37,879 this, Okay, we would do sixty five times and that would be times 155 00:12:37,080 --> 00:12:45,840 one point zero five times fifty point five zero, Okay, And that's how 156 00:12:45,879 --> 00:12:48,200 we would do it in order to see what that conductor actually is. So 157 00:12:48,320 --> 00:12:50,840 let's kind of do that and see what it is. And that's just the 158 00:12:50,919 --> 00:12:54,759 conductor. That's not what your question asks, because your question asked what is 159 00:12:54,799 --> 00:12:58,720 the maximum demand factor? And I believe we've already done that, because I 160 00:12:58,759 --> 00:13:03,200 beli that seventy five was supposed to be seventy five C for sixty five amps 161 00:13:03,240 --> 00:13:07,279 because that makes more sense. But I'm playing the devil's advocate here. Is 162 00:13:07,360 --> 00:13:11,440 just so you learned the question is how important it is to give me the 163 00:13:11,559 --> 00:13:16,919 details. We're going to assume that seventy five degrees F is the ambient and 164 00:13:18,000 --> 00:13:20,799 see what it comes out at. And if we do the math, it 165 00:13:20,919 --> 00:13:24,679 actually comes out to thirty four point one two, so not a big difference 166 00:13:24,720 --> 00:13:26,799 from thirty two point five to thirty four. You got a little bit more 167 00:13:26,879 --> 00:13:31,440 because it was a cooler ambient. It was lower than the thirty degrees clcs 168 00:13:31,480 --> 00:13:35,720 eighty six degrees Fahrenhek. Right, Again, that's really not what your question 169 00:13:35,960 --> 00:13:41,600 was. I believe that the question was basically sixty five amps at seventy five 170 00:13:41,639 --> 00:13:46,039 degrees C ten six gages THHW in a race way. What's the demand factor 171 00:13:46,320 --> 00:13:50,679 and it should be fifty percent. That's what I think your question was. 172 00:13:50,159 --> 00:13:52,639 Now at the end of the day, if you want to learn how I 173 00:13:52,759 --> 00:13:56,200 did all those things and you're asking about a video, then the best thing 174 00:13:56,240 --> 00:14:01,440 you can do is go over to fast tracks two and get an annual subscription. 175 00:14:01,960 --> 00:14:03,519 It is one hundred and twenty five dollars a year. You get it's 176 00:14:03,559 --> 00:14:07,279 a way of saying thank you for all that we do and I appreciate every 177 00:14:07,320 --> 00:14:09,960 bit of it. And you get access to videos and we're constantly going to 178 00:14:09,960 --> 00:14:15,639 be adding new videos, like the Drating Demystified is getting redone. But that's 179 00:14:15,679 --> 00:14:18,799 the video you want to watch, is de Rating Demystified, and it's over 180 00:14:18,919 --> 00:14:24,919 there in the two point zero version, and it's only available to annual subscribers 181 00:14:24,039 --> 00:14:30,519 of fasttrackstube dot com. That's our video platform. If you're interested in watching 182 00:14:30,559 --> 00:14:31,559 that video, you know you're gonna get out of but I tell you, 183 00:14:31,679 --> 00:14:35,720 for your money, you're also going to get a twelve hours of Grounding and 184 00:14:35,799 --> 00:14:39,399 Bonding series. You're gonna get a pool and swimming Pool series at me and 185 00:14:39,519 --> 00:14:41,919 Vince did that. We're also planning to update that as well. Hopefully I 186 00:14:43,000 --> 00:14:46,000 get Vince out here and we can get an updated edition for twenty twenty three. 187 00:14:46,039 --> 00:14:50,360 Because there's so many changes. There's other videos over there by other well 188 00:14:50,440 --> 00:14:54,120 known educators like Ryan Jackson, My Coult, others are being added all the 189 00:14:54,240 --> 00:15:01,559 time. It is a repository of a video, and we're really making it 190 00:15:01,679 --> 00:15:03,840 something that's going to grow and give you the ability to go there to get 191 00:15:03,960 --> 00:15:09,360 trusted videos, trusted resource, none of the other bs that floats around on 192 00:15:09,480 --> 00:15:15,279 YouTube, but real trusted electrical sources all in one location, and that's what 193 00:15:15,399 --> 00:15:18,159 fast tracks tubes all about. So you can go there and get a subscription. 194 00:15:18,600 --> 00:15:22,320 Look for de Rating Demystified, and that's going to tell you everything you 195 00:15:22,399 --> 00:15:26,240 need to know about adjustment and corrections. But I've tried to dissect your question, 196 00:15:26,320 --> 00:15:28,799 and since it's only asking about the maximum demand factor and it talks about 197 00:15:28,879 --> 00:15:33,679 ten sixes, that's why I sent you to three ten fifteen C one and 198 00:15:33,879 --> 00:15:37,000 that's why the answer would be fifty percent. But I also worked it out 199 00:15:37,120 --> 00:15:41,120 as if it was seventy five degrees fahrenheit ambient and how you would do that 200 00:15:41,240 --> 00:15:45,279 as well, because that means you would go to table three ten fifteen B 201 00:15:45,480 --> 00:15:48,879 one. Okay, that sounds confusing, then you need to watch the derating 202 00:15:48,960 --> 00:15:52,440 demystified video. Folks. All right, so hopefully I answered that question for 203 00:15:52,600 --> 00:15:58,679 you. Great question. The only thing I ask from people for exam questions. 204 00:15:58,279 --> 00:16:02,879 Please try your best to be specific. I get it when you leave 205 00:16:02,879 --> 00:16:07,360 an exam, it's hard to remember things, but I need the details, 206 00:16:07,919 --> 00:16:10,679 the details in matter. Is it a wet location, is it a dry 207 00:16:10,759 --> 00:16:15,600 location? Is it in a race way? Is what cycle? What edition 208 00:16:15,639 --> 00:16:19,039 of the code you're on? All of the details matter because I want to 209 00:16:19,080 --> 00:16:22,240 get you the best answer possible. That's it. I can't read your mind, 210 00:16:22,320 --> 00:16:26,000 and I can't read what these other people put on tests, so I 211 00:16:26,120 --> 00:16:27,720 do my best. So hopefully you got something out of that. Polked. 212 00:16:27,960 --> 00:16:32,360 Until next time, Stay safe, God Bless, and remember go listen to 213 00:16:32,440 --> 00:16:36,360 us on all of your favorite podcasting listening stations. Until next time, Stay 214 00:16:36,399 --> 00:17:03,559 safe, God Bless has open