1 00:00:33,799 --> 00:00:37,960 What's up, everybody? Welcome to another episode of Let's Ask Paul, the 2 00:00:38,039 --> 00:00:43,320 podcast where I, Paul Abernathy, do my best to answer your electrical code 3 00:00:43,320 --> 00:00:50,840 related questions submitted through our online portal at Paul Abernathy dot com. So before 4 00:00:50,840 --> 00:00:53,640 we get into today's episode, I do have people that ask me, well, 5 00:00:53,679 --> 00:00:57,520 Paul, what makes you qualified to answer people's code questions over people that 6 00:00:57,640 --> 00:01:00,119 just posted on social media? What makes you so special? Well, first 7 00:01:00,200 --> 00:01:08,040 of all, nothing makes me special. I feel happy, Oh so happy. 8 00:01:08,799 --> 00:01:12,120 Oh maybe that's supposed to be I'm so special anyway, that isn't. 9 00:01:12,920 --> 00:01:17,000 All I can tell you is that I have been doing this for thirty four 10 00:01:17,079 --> 00:01:22,879 years. I am the founder and CEO of Electrical Code Academy. Also created 11 00:01:23,000 --> 00:01:29,280 and trademarked the Certified Master Electrical Code Professional program that has certified professionals all over 12 00:01:29,319 --> 00:01:34,680 the country. I've served for NIMA. I worked for National Electrical Manufacturers Association 13 00:01:34,879 --> 00:01:41,159 as their NEC code expert in field rep for the southern sections about thirteen or 14 00:01:41,159 --> 00:01:46,040 fourteen states. I've worked at as an engineer for the City of Richmond, 15 00:01:46,120 --> 00:01:52,760 Virginia, overseeing inspections and plan review in the engineering department. I have worked 16 00:01:52,760 --> 00:01:56,120 for City of Alexandria, Virginia. I was a head of the Code Inspectors 17 00:01:56,799 --> 00:02:02,239 and the education on the NEC. I have was an electrical contractor for many, 18 00:02:02,239 --> 00:02:06,439 many, many many years, twenty plus years. I tried to juggle 19 00:02:06,480 --> 00:02:12,039 all that and tried to keep everything going for years and again. I am 20 00:02:12,240 --> 00:02:17,960 director of technical services for a major manufacturer of wiring cable. So i've and 21 00:02:19,360 --> 00:02:24,120 I've been. I've held all of my ICC inspection certifications from residential to commercial 22 00:02:24,199 --> 00:02:30,759 to plan review. I'm a master electrician in multiple states. I could go 23 00:02:30,840 --> 00:02:32,919 on and on and on. I've written books on the NEEC. I co 24 00:02:34,000 --> 00:02:38,120 wrote books with Phil Simmons and for s Engage. Let's see what else. 25 00:02:38,199 --> 00:02:43,919 My first book was written in two thousand and seven, which was purely for 26 00:02:44,039 --> 00:02:50,039 electrical inspectors and home inspectors. Gosh, I don't know. I've over a 27 00:02:50,039 --> 00:02:53,719 thousand episodes in podcasts. I'm all over social media, so my opinions are 28 00:02:53,759 --> 00:02:58,520 out there, so I'm not this random guy that just puts them out there 29 00:02:58,560 --> 00:03:02,039 on a message board doesn't do anything. Oh. I should also mention that 30 00:03:02,159 --> 00:03:07,520 I serve on Code Making Panel five in Code Panel seventeen for the development of 31 00:03:07,560 --> 00:03:12,319 the National Electrical Code, and I have for many cycles. So I'm just 32 00:03:12,360 --> 00:03:16,520 not you know, I'm not special. Again, i am not, but 33 00:03:16,960 --> 00:03:21,039 I have been around a little bit. And it's not to say that I 34 00:03:21,080 --> 00:03:24,960 can't be wrong, but I am going to probably rely on my interpretation over 35 00:03:25,400 --> 00:03:31,360 somebody that just randomly shows up on TikTok or Instagram or Facebook groups or whatever 36 00:03:31,439 --> 00:03:37,240 and wants to beat their chest to seem intelligent. I don't need to get 37 00:03:37,240 --> 00:03:38,879 into those arguments. You can look who I am. Just open your codebook 38 00:03:38,960 --> 00:03:42,400 up. I'm in the front. It's not a big deal. Okay, 39 00:03:42,719 --> 00:03:46,280 all right, Look why did I tell you all that. I told you 40 00:03:46,319 --> 00:03:50,639 all that to be able to establish the fact that I'm just not your regular 41 00:03:50,759 --> 00:03:53,560 Joe Schmoe that comes on here. I don't just write books and have never 42 00:03:53,639 --> 00:03:59,680 served on a committee. I've served on UL committees, ASTM committees, NIMA 43 00:03:59,680 --> 00:04:08,479 commit I have nine patents to my name in the wiring cable industry. I've 44 00:04:08,479 --> 00:04:15,319 got tons of federal trademarks and service marks. So again, when I tell 45 00:04:15,360 --> 00:04:19,040 you, somebody gives you questions and answers things for you. And this is 46 00:04:19,079 --> 00:04:23,319 why it's so important to tell you about the free service at Paul Abernathy dot 47 00:04:23,360 --> 00:04:27,160 com. I'm here for you. I'm here the answer questions for you. 48 00:04:27,519 --> 00:04:30,079 Okay, the next generation of young folks is gonna have to pick up that 49 00:04:30,199 --> 00:04:33,519 tab because a lot of us older folks are gonna be cashing in. Baby, 50 00:04:33,759 --> 00:04:38,399 we're getting old. We ain't gonna be here long, Okay. The 51 00:04:38,439 --> 00:04:42,199 Paul Abernathys, the Mike Holtz, the Ryan Jackson's of the world, they're 52 00:04:42,240 --> 00:04:46,319 gonna go away. The Phil Simmons, the Charles Millers, We're all gonna 53 00:04:46,720 --> 00:04:49,560 we're getting old. Okay. And I know, you know, people don't 54 00:04:49,600 --> 00:04:53,480 want to hear that, but it is what it is. And so eventually 55 00:04:53,560 --> 00:05:00,639 we're we're gonna check out to the big uh whatever, the the elect Trician's 56 00:05:00,759 --> 00:05:03,399 retirement home in the sky or something at some point. So we need to 57 00:05:03,439 --> 00:05:09,600 make sure that people are passing on knowledgeable information, accurate information, and stop 58 00:05:09,639 --> 00:05:15,759 this social media people that just post stuff and they have literally no clue and 59 00:05:15,800 --> 00:05:17,920 they don't back it up with code, They don't give any code references. 60 00:05:18,120 --> 00:05:20,680 They want you to believe them, but they don't back it up with anything. 61 00:05:23,720 --> 00:05:26,920 Okay, enough of that ranting. I held you in here for five 62 00:05:26,920 --> 00:05:30,120 minutes ranting. So now let's get into the day's topic. So I was 63 00:05:30,160 --> 00:05:32,680 asked the question, and this is going to be maybe difficult for me to 64 00:05:32,720 --> 00:05:38,639 convey over a podcast. I have videos on this over on our fast Tracks 65 00:05:38,680 --> 00:05:42,639 tube platform. We'd love to have you over there. It's a fifty percent 66 00:05:42,680 --> 00:05:46,800 off right now if you use a coupon code fifty off all caps by the 67 00:05:46,839 --> 00:05:51,279 way, five zeroff, and that'll get you fifty percent off your annual membership. 68 00:05:51,600 --> 00:05:55,680 We have an eight hour calculations video over there. I have a I 69 00:05:55,720 --> 00:06:00,680 think it's a twelve or thirteen hour grounding and bonding video. We have an 70 00:06:00,720 --> 00:06:04,399 eight part series on swimming pool spas and all that I did with Vince Dellacroach, 71 00:06:04,800 --> 00:06:11,279 great guy by the way. So that is all part of that annual 72 00:06:11,319 --> 00:06:15,160 subscription to fast Tracks too, So give it a consideration. We'd prefer you 73 00:06:15,199 --> 00:06:17,199 to if you're going to say thank you for what we do, I prefer 74 00:06:17,240 --> 00:06:20,439 you to get into that because you get something for it, You get videos, 75 00:06:21,319 --> 00:06:26,240 beautiful thing. Right. Okay, all right, let's get into today's 76 00:06:26,240 --> 00:06:30,680 episode. So I've been asked by somebody to explain how to calculate for a 77 00:06:30,879 --> 00:06:36,720 new restaurant in their case, it was an all electric restaurant. And how 78 00:06:36,759 --> 00:06:42,399 to calculate the size of the service? Okay, which is also going to 79 00:06:42,439 --> 00:06:46,000 apply to a feeder, right, because you could have the main service outside 80 00:06:46,000 --> 00:06:48,000 and then it changes over into a feeder to come into the building. Okay, 81 00:06:48,160 --> 00:06:51,079 same concept, But they want to know how do we calculate that? 82 00:06:51,199 --> 00:06:58,480 Now? Typically I would calculate that using Part three, which is a standard 83 00:06:58,519 --> 00:07:01,519 method and allows me to go through and collect all my things together, right 84 00:07:02,639 --> 00:07:08,480 and just sizes it that way. But that would be an excessively large service 85 00:07:09,920 --> 00:07:14,199 because I'm not going to have that much a demands that I can apply. 86 00:07:14,240 --> 00:07:16,399 I mean, obviously I will for the receptacles at one hundred and eighty VA, 87 00:07:16,680 --> 00:07:19,079 I will get a break on that. When you have a certain amount, 88 00:07:19,439 --> 00:07:25,639 I will get some allowances, right, I will get some allowances for 89 00:07:27,000 --> 00:07:30,639 non dwelling type of appliances. Okay, I will get some breaks for that. 90 00:07:32,279 --> 00:07:38,600 But for the most part, I'm going to use something that is found 91 00:07:38,759 --> 00:07:43,920 in the optional method. And just to let you know, for electrical exams, 92 00:07:45,519 --> 00:07:50,399 the high probability is when they ask you about a restaurant calculation, They're 93 00:07:50,399 --> 00:07:54,519 not going to throw all these things at you because you don't have enough time. 94 00:07:54,759 --> 00:07:58,800 But what they'll throw with you is a total VA count that maybe have 95 00:07:58,920 --> 00:08:01,560 done by the engineer, because typically restaurant's going to be designed by an engineering 96 00:08:01,560 --> 00:08:07,319 firm. Right, They're gonna whether it's a chain restaurant, they're gonna have 97 00:08:07,360 --> 00:08:11,439 these designs. They're gonna they're gonna be very specific about what they want because 98 00:08:11,439 --> 00:08:15,160 this is not typically not a one off. They know what they're doing. 99 00:08:15,240 --> 00:08:18,000 The design engineers know what they're doing, so they're probably gonna give you a 100 00:08:18,120 --> 00:08:24,879 set via value voltampire's value okay, and you're gonna need to know okay, 101 00:08:24,240 --> 00:08:28,160 and they may even give you all the load anyway, and all you got 102 00:08:28,160 --> 00:08:33,480 to do is just follow directions on an exam. Typically, and I can 103 00:08:33,559 --> 00:08:37,480 tell you this is the case in the Texas exam. What they try to 104 00:08:37,480 --> 00:08:41,399 do here is just give you a total connected load. Okay, everything that's 105 00:08:41,440 --> 00:08:46,399 been connected, so you haven't applied any demand yet. It's just everything just 106 00:08:46,559 --> 00:08:48,720 added up. What is it. It's all the electric loads. That's the 107 00:08:48,759 --> 00:08:54,759 heating and cooling, uh, that is the uh, every load that is 108 00:08:54,799 --> 00:08:58,399 connected together. Okay, so all electric loads. Just add it all up 109 00:08:58,759 --> 00:09:05,480 at its face value. And then you're able to then go to two twenty 110 00:09:05,519 --> 00:09:09,759 dot eighty eight and you get to use the optional method. Now it'll tell 111 00:09:09,799 --> 00:09:13,120 you right at the beginning of two twenty dot eighty eight, it'll say that 112 00:09:13,200 --> 00:09:20,080 you can use this to twenty dot eighty eight in lieu of part three. 113 00:09:20,600 --> 00:09:24,480 What that means is, it's okay to use this table, use this optional 114 00:09:24,519 --> 00:09:28,120 method. But if you wanted to use part three, you could do it 115 00:09:28,120 --> 00:09:31,759 if you wanted. Okay, So we're gonna be looking at what you're likely 116 00:09:31,799 --> 00:09:35,399 to get on an exam, and that is the application of the optional method 117 00:09:35,440 --> 00:09:39,840 under two twenty dot eighty eight. All right, So what you'll see here 118 00:09:39,879 --> 00:09:43,080 is I'll read to twenty dot eighty eight, and then we'll give you an 119 00:09:43,120 --> 00:09:50,120 example. It says calculations of a service or feeder load where the feeder serves 120 00:09:50,159 --> 00:09:52,720 the total load. And it gave you that example whereas you may have the 121 00:09:52,759 --> 00:09:58,879 main disconnect outside and then it turns over into a feeder coming in and hitting 122 00:09:58,960 --> 00:10:03,080 the gear in stuff inside. That's an example where that feeder is going to 123 00:10:03,080 --> 00:10:07,519 see the entire load of the restaurant. It's just simply allowing you to put 124 00:10:07,559 --> 00:10:13,919 the equipment further into the building rather than outside or nearest point of entry. 125 00:10:13,960 --> 00:10:16,600 You get me. So you might have the main disconnect outside could be rather 126 00:10:16,759 --> 00:10:22,080 large, twelve hundred amp whatever, and then it changes over and you've got 127 00:10:22,080 --> 00:10:26,559 feeders coming into the building. Okay, all right, So where that feeder 128 00:10:26,840 --> 00:10:33,039 serves, the total load for a new restaurant shall be permitted in accordance with 129 00:10:33,120 --> 00:10:37,960 Table two twenty eighty eight in lieu of Part three of this article. Okay, 130 00:10:39,039 --> 00:10:43,960 so I don't have to do the piecemeal approach in part three. I 131 00:10:43,000 --> 00:10:48,840 can just simply take up all of the electrical loads, and that includes both 132 00:10:48,840 --> 00:10:52,000 the heating and cooling in order to come up with what we call the total 133 00:10:52,120 --> 00:10:56,240 connected load. And a lot of the engineers will do that. They'll just 134 00:10:56,320 --> 00:11:01,080 simply take all the loads that are in question. Right now, it goes 135 00:11:01,120 --> 00:11:07,279 on to say the overload protection of these service conductors shall be in accordance with 136 00:11:07,559 --> 00:11:13,879 two thirty ninety and two forty dot four. Well, of course two ninety 137 00:11:13,919 --> 00:11:18,080 is saying each unngrounded service conductor shall have overload protection. So again you gotta 138 00:11:18,120 --> 00:11:22,759 have your overload protection. You gotta protect your conductors. Uh. And so 139 00:11:22,840 --> 00:11:26,879 that's so it's just should be a given. And then of course it's reference 140 00:11:26,919 --> 00:11:31,279 to two forty dot four is just again reminding that you're going to protection of 141 00:11:31,320 --> 00:11:35,000 the conductors, and then you'll have, you know, all these different allowances 142 00:11:35,039 --> 00:11:39,600 like where you have overcurrent devices rated eight hundred amp years or less, and 143 00:11:39,600 --> 00:11:43,240 then the next size up allowances, and then of course it'll remind you that 144 00:11:43,720 --> 00:11:48,159 you have a situation where you have over eight hundred amps and you have overcurrent 145 00:11:48,200 --> 00:11:50,879 protection and so you got to have all these rules that you have to meet. 146 00:11:50,919 --> 00:11:54,360 Okay, that's all that's reminding you is remember you're gonna meet all the 147 00:11:54,399 --> 00:12:01,080 general rules. It says feeder conductors shall not be required to be a greater 148 00:12:01,200 --> 00:12:05,519 ampacity than the service conductors. If that makes sense. If these feeders are 149 00:12:05,559 --> 00:12:09,720 coming from the service outside and the service conductors were calculated to be a certain 150 00:12:09,759 --> 00:12:15,720 size, well there's no sense that there's no reason for those feeders inside that 151 00:12:15,799 --> 00:12:20,519 are meeting this allowance. Again, remember that it has to what serve the 152 00:12:20,600 --> 00:12:24,759 total load. Then this is just saying that no case does those feeder conductors 153 00:12:24,799 --> 00:12:28,600 have to be larger than the service conductors. Okay, so you don't have 154 00:12:28,639 --> 00:12:33,080 some weird situation where these feeders end up calculating larger than what the service conductors 155 00:12:33,080 --> 00:12:37,639 would be. So the feeders again not required to be a greater apacity than 156 00:12:37,679 --> 00:12:43,480 the service conductors. Makes sense. And then lastly it says service or feeder 157 00:12:43,480 --> 00:12:50,440 conductors whose calculated load is determined by this optional calculation that we're getting ready to 158 00:12:50,480 --> 00:12:56,879 do. It says shall be permitted to have the neutral load determined by two 159 00:12:56,919 --> 00:13:03,519 twenty sixty one. Right six one uh for those that do know that actually 160 00:13:03,799 --> 00:13:09,960 is in the optional excuse me, that's in the standard method. Right. 161 00:13:09,480 --> 00:13:13,960 So again it's going to be one of those things that you're going to have 162 00:13:13,039 --> 00:13:18,639 to do a calculation, and it sends you back to the two twenty dot 163 00:13:18,679 --> 00:13:24,639 sixty one. But notice that it says that the service of feeder calculations whose 164 00:13:24,679 --> 00:13:31,200 calculated load is determined by this optional method shall be permitted to have a neutral 165 00:13:31,240 --> 00:13:35,559 load determined by two twenty dot sixty one. There are some applications where the 166 00:13:35,200 --> 00:13:41,320 engineering and design is going to make it full size same as whatever these ungrounded 167 00:13:41,320 --> 00:13:45,519 conductors would be, but you are permitted to use the allowances in two twenty 168 00:13:45,519 --> 00:13:48,559 dot sixty one. Just remember that two twenty dot sixty one is under Part 169 00:13:48,720 --> 00:13:52,960 three. So that means that where you saw that it said in lieu of 170 00:13:54,000 --> 00:13:58,200 Part three, well, in order to calculate for the neutral, then you're 171 00:13:58,240 --> 00:14:01,600 going to have to go back through and calculate that neutral, which is the 172 00:14:03,080 --> 00:14:07,360 you're trying to determine the maximum unbalanced load. And since two twenty sixty one 173 00:14:07,480 --> 00:14:11,639 sits in part three, it's not in part four. It's in Part three 174 00:14:13,039 --> 00:14:16,759 that's going to force you to understand that you're gonna have to do what You're 175 00:14:16,799 --> 00:14:20,320 gonna have to be able to do a standard calculation. So if anybody ever 176 00:14:20,399 --> 00:14:24,159 tells you that you don't have to worry about how to do standard calcs in 177 00:14:24,200 --> 00:14:28,720 part three, we call it standard, but it's just Part three method, 178 00:14:28,840 --> 00:14:33,159 don't listen to them. You need to know how to even though your question 179 00:14:33,320 --> 00:14:37,879 might be on the optional method, you need to understand how to do the 180 00:14:39,759 --> 00:14:43,039 regular method under part three. Now, good news for most electrical exams. 181 00:14:43,399 --> 00:14:46,679 When they give you a total connected load, they don't give you all of 182 00:14:46,720 --> 00:14:50,960 the variables in order to be able to calculate the size of a neutral load. 183 00:14:52,679 --> 00:14:54,720 So that means you don't have to consider it, you're only sizing. 184 00:14:54,799 --> 00:14:58,960 Maybe it wants to know what the size of the service. It's not asking 185 00:14:58,960 --> 00:15:03,360 you for the neutral okay, so again that makes it easy for that. 186 00:15:03,720 --> 00:15:07,200 But in the real world, just remember that you can use this optional method, 187 00:15:07,200 --> 00:15:11,320 but when it comes to the neutral um you you would you can use 188 00:15:11,360 --> 00:15:15,000 the two twenty sixty one, which is under Part three, which means you're 189 00:15:15,000 --> 00:15:18,200 going to have to do a standardized calculation. But this is permitted. It 190 00:15:18,240 --> 00:15:22,159 says it shall be permitted if you want it to be full size neutrals based 191 00:15:22,200 --> 00:15:26,240 on the size of your ungrounded conductors that you're going to do in this optional 192 00:15:26,279 --> 00:15:28,720 calc You can do that if you want, and it's just going to be 193 00:15:28,720 --> 00:15:33,759 bigger neutral conductors. But that's never going to hurt anything. Okay, all 194 00:15:33,840 --> 00:15:35,399 right, hopefully I'm clear with that. All right, So let's look in 195 00:15:35,440 --> 00:15:41,000 an example. Lets so let's say in our example, let's say that the 196 00:15:41,080 --> 00:15:50,960 engineer gives me or the exam says that you have six hundred kVA of total 197 00:15:52,080 --> 00:15:54,440 connected load. Then that's they're giving me that. They're telling me, okay, 198 00:15:54,440 --> 00:15:58,480 we'd added everything up. We've already done all this. We're to added 199 00:15:58,519 --> 00:16:02,080 all the ace, see any heat, we took, all the electric loads, 200 00:16:02,120 --> 00:16:07,360 we added everything up and it is six hundred kVA, and that's what 201 00:16:07,440 --> 00:16:11,320 it gives you on the question. So now you're saying, Okay, how 202 00:16:11,399 --> 00:16:15,759 the crap do I apply this this table for that? Okay, well, 203 00:16:15,840 --> 00:16:19,360 let's look at the table and let's work it together. So when you come 204 00:16:19,399 --> 00:16:22,200 down to this table, to twenty dot eighty eight, and again, if 205 00:16:22,200 --> 00:16:26,799 you're out in the field driving, just listen, and when you get somewhere 206 00:16:26,879 --> 00:16:30,720 take a break, crack your codebook open and go to twenty dot eighty eight 207 00:16:30,759 --> 00:16:34,279 and look at the table. On the table, you'll see three columns. 208 00:16:36,000 --> 00:16:40,159 The left cottumn is your total connected load, which is what the engineer or 209 00:16:40,200 --> 00:16:42,480 the exam gave you. It said six hundred v eight Okay, six hundred 210 00:16:42,519 --> 00:16:45,639 kVA. Okay, that's your total connected load. They just gave it to 211 00:16:45,679 --> 00:16:49,279 you. They've already done the work for you. Now. In the middle 212 00:16:49,320 --> 00:16:55,840 column it says all electric restaurant. That's what we have. In the right 213 00:16:55,919 --> 00:17:00,159 it says not all electric restaurant. So that means you might have, for 214 00:17:00,159 --> 00:17:04,640 example, some gas Okay, you might have some gas appliances and whatnot. 215 00:17:06,319 --> 00:17:11,000 So in our case, most of the time, the questions that I'm aware 216 00:17:11,039 --> 00:17:15,119 of on the electric exams, deal with an all electric restaurant. Okay, 217 00:17:17,000 --> 00:17:19,319 Now, it's not gonna matter for you on the exam, because whether they 218 00:17:19,400 --> 00:17:22,599 say it's all electric or not, they're still going to give you the total 219 00:17:22,680 --> 00:17:26,880 connected load. You just choose which one they have to tell you whether it's 220 00:17:26,920 --> 00:17:32,279 an all electric or if it's not all electric. And the only way that 221 00:17:32,319 --> 00:17:34,440 you'd be able to tell is that they gave you a list of certain things 222 00:17:34,440 --> 00:17:37,920 and ended up saying in there that was a gas range or a gas this 223 00:17:38,079 --> 00:17:41,200 or what. Then you should look at and go, well, crap, 224 00:17:41,240 --> 00:17:45,480 it's not an all electric restaurant. And that's okay. There's still use the 225 00:17:45,599 --> 00:17:48,880 VA that they gave you, and you just choose which column to use. 226 00:17:48,240 --> 00:17:52,920 Now, in my experience, most of the time the questions are based around 227 00:17:52,960 --> 00:17:59,440 an all electric restaurant, but just be ready to based on what they give 228 00:17:59,480 --> 00:18:03,240 you. They may get give you a sentence that says electric all electric restaurant 229 00:18:03,960 --> 00:18:07,640 with gas cooking or whatever. Then you they're trying to They're not trying to 230 00:18:07,640 --> 00:18:08,720 trick you. They're just making you think, well, wait a minute, 231 00:18:08,759 --> 00:18:12,799 it isn't an all electric, and that's why you have the other column and 232 00:18:12,799 --> 00:18:15,799 you apply the code the same way I'm going to do it here, but 233 00:18:15,839 --> 00:18:18,960 I just want you to be aware of that so you don't get tripped up 234 00:18:19,039 --> 00:18:22,880 by anything. All right. So in our case, it's an all electric 235 00:18:22,920 --> 00:18:26,200 restaurant, So we're going to be using the total connect the load column, 236 00:18:26,680 --> 00:18:30,640 and we're going to be using the center column, which is all electric restaurant. 237 00:18:30,359 --> 00:18:33,799 All right. So now we had six hundred kVA, So on the 238 00:18:33,880 --> 00:18:37,519 left, you'll notice that it goes zero to two hundred, then it goes 239 00:18:37,519 --> 00:18:41,079 two hundred and one to three twenty five. And remember that is kVA, 240 00:18:41,720 --> 00:18:47,400 So that is two hundred thousand zero to two hundred thousand va, and then 241 00:18:47,440 --> 00:18:52,799 it's two hundred and one thousand to three hundred and twenty five thousand, and 242 00:18:52,799 --> 00:18:56,319 then you have three hundred and twenty six thousand to eight hundred thousand, and 243 00:18:56,359 --> 00:19:00,519 then you got over eight hundred thousand. Okay, you see, we're we're 244 00:19:00,519 --> 00:19:03,200 doing all this, okay. So now the first thing we're gonna know is 245 00:19:03,240 --> 00:19:07,160 which one are we in? Where we're in the one that's three twenty six 246 00:19:07,200 --> 00:19:10,759 to eight hundred, right, because the engineer gave us or the exam gave 247 00:19:10,839 --> 00:19:15,799 us six hundred kVA. Perfect. So now we go to the right and 248 00:19:15,839 --> 00:19:18,079 we go to the center. Calm, no, what does it say. 249 00:19:18,160 --> 00:19:22,880 It says fifty percent. Now, the first thing that people do in mistakedly 250 00:19:22,519 --> 00:19:26,880 is they take that six hundred kVA and they drop it to three hundred. 251 00:19:26,440 --> 00:19:32,160 They think that's what this means. That is not what this means. Notice 252 00:19:32,200 --> 00:19:36,160 the order of working out of an equation. You do the parentheses, and 253 00:19:36,200 --> 00:19:38,920 you pay attention to parentheses first. And here's what it says. It says 254 00:19:40,240 --> 00:19:45,240 amount that's over three twenty five, and that is what the fifty percent is 255 00:19:45,240 --> 00:19:49,920 applied to. So if we have six hundred, we have to take away 256 00:19:51,440 --> 00:19:56,440 three twenty five, so the amount over three twenty five. So I'm gonna 257 00:19:56,440 --> 00:20:02,720 have six hundred and I'm gonna take away three hundred and twenty five. That 258 00:20:02,759 --> 00:20:07,400 gives me two hundred and seventy five kVA. Okay, So now what it 259 00:20:07,440 --> 00:20:12,319 says is take that amount at fifty percent. So I'm going to take that 260 00:20:12,359 --> 00:20:18,359 two seventy five and I'm going to multiply that by point five zero, and 261 00:20:18,400 --> 00:20:22,519 that gives me one hundred and thirty five point five. And if you question 262 00:20:22,559 --> 00:20:25,599 your math, just do that times two, and you'll see that takes you 263 00:20:25,680 --> 00:20:27,920 back to two seventy five. Okay, So now that I have one hundred 264 00:20:27,920 --> 00:20:33,160 and thirty five point five, then I'm going to actually finish the equation. 265 00:20:33,440 --> 00:20:38,319 It says then it says plus one hundred and seventy two point five. So 266 00:20:38,359 --> 00:20:45,880 I'm going to take that one thirty five point five plus one seventy two point 267 00:20:45,960 --> 00:20:52,599 five, and that's going to be three hundred and eight kVA. That is 268 00:20:52,799 --> 00:21:02,079 now my calculated kVA, and I use that now to multiply that buy whether 269 00:21:02,119 --> 00:21:04,000 it's single phase or three phase, in order to to find out what my 270 00:21:04,160 --> 00:21:08,000 conductors need to be. Okay, but this is the kind of question that 271 00:21:08,039 --> 00:21:12,079 you'll get on an exam, and you need to make sure you understand how 272 00:21:12,119 --> 00:21:17,079 to do this. Okay. For example, if this was single phase, 273 00:21:17,160 --> 00:21:19,359 then it would be three hundred and eight, right, and so me at 274 00:21:19,359 --> 00:21:22,000 this point, I like to actually go and make it all the way three 275 00:21:22,079 --> 00:21:26,400 hundred and eight thousand, uh, And then I divide that by two forty 276 00:21:27,400 --> 00:21:33,319 and that is one thousand, two hundred and eighty three point three, and 277 00:21:33,839 --> 00:21:36,680 that is my AMP rating. So I'm going to be one thousand, two 278 00:21:36,720 --> 00:21:38,599 utter and eighty three, and then of course for me, I need to 279 00:21:38,680 --> 00:21:41,960 parallel that out so that I can see how many sets I need to be 280 00:21:42,400 --> 00:21:45,799 in order to be able to cover that one thousand two uter in eighty three. 281 00:21:47,319 --> 00:21:52,200 Okay, Now, if this was three phase, then you got to 282 00:21:52,200 --> 00:21:56,359 remember that it's the square root of three is one point seventy three to two. 283 00:21:57,359 --> 00:22:00,920 So I'm going to be taking what I'm going to be taking that three 284 00:22:00,039 --> 00:22:03,440 hundred and eight thousand. Now, well, first of all, let's go 285 00:22:03,440 --> 00:22:06,519 in and get our value for the square that we're going to use in here. 286 00:22:06,599 --> 00:22:11,799 So it would be it would be two eight times one point seven three 287 00:22:11,839 --> 00:22:17,680 to two, and that would be three hundred and sixty point two five six. 288 00:22:17,720 --> 00:22:21,200 So we're gonna make this three hundred and sixty point two six. And 289 00:22:21,319 --> 00:22:26,359 now we're going to take that three hundred and eight thousand divided by three sixty 290 00:22:26,400 --> 00:22:30,279 point twenty six, and now is going to be eight hundred and fifty four 291 00:22:30,400 --> 00:22:36,240 thousand, excuse me, eight hundred and fifty four point nine three eight, 292 00:22:36,680 --> 00:22:41,279 which is going to translate this into eight hundred and fifty five. So we 293 00:22:41,319 --> 00:22:45,039 have eight hundred and fifty five amps, considerably less than if it was single 294 00:22:45,039 --> 00:22:48,799 phase. Which was twelve hundred. So again inherently, you see there are 295 00:22:48,920 --> 00:22:52,839 benefits in this case to the three phase. So I'm going to still do 296 00:22:52,920 --> 00:22:56,559 the same thing, and then at that point I'm going to have to determine 297 00:22:56,599 --> 00:22:59,960 how many sets I need in in this case, the other one, I'm 298 00:23:00,039 --> 00:23:02,640 might have needed four, and this one it might only need three or maybe 299 00:23:02,680 --> 00:23:06,720 even two, depending But that all depends again on what you're what you're dealing 300 00:23:06,759 --> 00:23:08,640 with, whether it's three phase or single phase. And they have to give 301 00:23:08,680 --> 00:23:11,519 you that in the question, by the way, Okay, it's not something 302 00:23:11,519 --> 00:23:15,200 that you have to just you know, God, I wonder what it is 303 00:23:15,640 --> 00:23:19,839 they're going to give you this information. So this is the kind of question 304 00:23:19,920 --> 00:23:26,599 that you'll see, for example one a Texas exam, And you just need 305 00:23:26,640 --> 00:23:29,599 to be able to understand how this works. And I think the more important 306 00:23:29,599 --> 00:23:33,920 part is how the column works. Remember in the center column when it's all 307 00:23:33,960 --> 00:23:40,079 electric, it's telling you that the fifty percent is applied to the amount that's 308 00:23:40,400 --> 00:23:45,640 over three twenty five, and then you add the one hundred and seventy two 309 00:23:45,680 --> 00:23:51,759 point five to that to get your total calculated load. Okay, and that 310 00:23:51,880 --> 00:23:56,480 is no different if it's not an all electric range, same kind of concept. 311 00:23:56,839 --> 00:24:03,039 It's just the percentage values change. So hopefully that that's made it a 312 00:24:03,079 --> 00:24:06,599 little easier. Maybe. I know it's a podcast, so it's kind of 313 00:24:06,599 --> 00:24:11,759 difficult, but if you pause it, you follow along. And I sometimes 314 00:24:11,799 --> 00:24:14,720 take a lot of pride in making sure that I'm painting a mental picture. 315 00:24:15,559 --> 00:24:18,000 But sometimes, you know, I can struggle with that because so you know, 316 00:24:18,079 --> 00:24:22,000 if you understood it, let us know always. It's great to get 317 00:24:22,039 --> 00:24:25,279 your comments thumbs up, share it with other people, share it with people 318 00:24:25,279 --> 00:24:30,440 that you work with. We have over a thousand episodes of podcasts available on 319 00:24:30,640 --> 00:24:34,319 all your popular listening platforms. All you got to do is search from Master 320 00:24:34,920 --> 00:24:41,039 the NEC and they're available on all those platforms. Or you can get our 321 00:24:41,039 --> 00:24:42,920 mobile app and you can get access to them directly from our mobile app. 322 00:24:44,160 --> 00:24:48,440 It's free. Just go to fasttracksystem dot com or you can go to any 323 00:24:48,559 --> 00:24:53,079 C H A T dot com and download it from there as well. All 324 00:24:53,160 --> 00:24:56,480 right, all right, so hopefully I explain that to you you got a 325 00:24:56,519 --> 00:24:59,480 little better understanding of it, and I did in confuse you. But if 326 00:24:59,519 --> 00:25:02,480 you do you have any confusion, you know what you can do. Just 327 00:25:02,519 --> 00:25:07,279 go to Paul Abernathy dot com send me your question. Be very detailed about 328 00:25:07,279 --> 00:25:11,440 what you don't understand. Let me know what code cycle you're under in the 329 00:25:11,640 --> 00:25:15,880 very again, very detailed in your question, because it's hard for me to 330 00:25:15,920 --> 00:25:21,759 answer vague questions, so please be as detailed as possible. Until next time, 331 00:25:21,759 --> 00:25:49,039 folks, stay safe, God bless