0133 sq in. Reactance is in there. Mathematical and electrical tools, calculators, and Jan 29, 2020 · Djelite said: Ok that’s still not chapter 9 table 1. Radius of Conduit and Tubing Bends. “I” = Amperes: The load in amperes at 100 percent, not 125 percent for motors or continuous loads. 6 AWG, type UF copper cable is, If a Conductor has a low resistance it and more. That’s pretty much the meat and cheese of Mar 23, 2022 · Because of this, Chapter 9 - Tables before is now Chapter 10. Improve your grades and reach your goals with 25A. 15(B)(16), I know which wire I need to use. Table 1. Table 10 in Chapter 9 makes its first appearance with the 2011 revision. Chapter 9 contains major tables and are used when referenced as applicable in the Code. Apr 6, 2021 · The resistance is calculated in accordance with National Bureau of Standards Handbook 100, dated 1966, and Handbook 109, dated 1972. 1 NEC Chapter 9, Table 1, Percent of Cross Section of Conduit and Tubing for Conductors 15. For complete systems, the number of conductors cannot exceed the percentage fill in Chapter 9, Table 1. The "Q" adjustment factor is determined by dividing alternating current resistance as listed in NEC Chapter 9, Table 9, by the direct current resistance as listed in Chapter 9, Table 8. EMT (Electrical Metallic Tubing) ENT (Electrical Nonmetallic Tubing) FMC (Flexible Metal Conduit) IMC (Intermediate Metal Conduit) LFNC-B (Liquidtight Flexible Nonmetallic Conduit type B) LFNC-A (Liquidtight Flexible Nonmetallic Conduit type A) LFMC Chapter 9 Percent of Cross Section of Conduit and Tubing for Conductors and Cables. In the article Calculations of Voltage Drop - Part One I pointed out that there are eight methods of calculating voltage drop as follows: 1-Ohm's Law Method, 2-European Method, 3-U. Fortunately, the NEC now provides tables to reduce the amount of calculation in the field. Conductors. 1 Understanding the NEC, Chapter 9 Tables Table 1—Conductor Percent Fill The maximum percentage of allowable conductor fill is listed in Chapter 9, Table 1. 14 AWG THW conductor = 0. 081 . 31 2. pdf), Text File (. Trade Size. 31(F) and 690. Chapter 9 of the National Electrical Code (NEC) ends with a series of related tables: 11 (A). Location New York Occupation Engineer (PE) Jan 2, 2024 #1 NEC 2014: Chapter 9 Table 8. Dimensions and Percent Area of Conduit and Tubing (Areas of Conduit or Tubing for the Combinations of Wires Permitted in Table 1, Chapter 9) Table 5. Table 2. 5. Table 5. In the NEC ®, there are two main locations (near the back Apr 21, 2011 · Consequently, the 2011 NEC stresses the need to use specific terminations for fine-stranded conductors and cables. The geometric mean distance (equivalent conductor spacing) impacts the impedance of the conductors; this is the case with busways also. (6) For combinations of conductors of different sizes, use actual dimensions or Table 5 and Table 5A for dimen‐ sions of conductors and Table 4 for the applicable conduit or tubing dimensions. , Which of the following would not be included in NEC Chapter 9, Table 8? and more. for both IMC and RMC. Also, Table 9 (and my spreadsheet) allows you to consider the type of conduit. Where conduit or tubing nipples having a maximum length not to exceed 24 inches are installed between boxes, cabinets, and similar enclosures, the nipples shall be permitted to be filled to 60% of their total cross-sectional area, and 310. 53%. 1 Section 15 NEC Chapter 9 Tables and Annexes B and C 15. Size (AWG or kcmil) Ohms to Neutral per Kilometer Ohms to Neutral per 1000 Feet. Table 310. There are 9 Chapters to the book as well as a section of definitions in the front and some helpful informational Annexes in the back. ) for a size #10 AWG SOLID; 1. Remember that (ºF - 32) / 1. 16, what is the Ampacity of a # 6 AWG Copper THHN (194°F) conductor. 2, 2021. 20, Sec. According to NEC Table 8, Chapter 9, Conductor Properties; What is the Direct-Current Resistance at 75°C (167°F) for Copper that is Coated in Ohm/kFT (Ohms per 1,000 ft. NEC Chapter 9 Table 5. ) 40% raceway area for over 2 conductors 1. site. Table 8 shows straight resistance and table 9 shows "AC resistance", which is actually impedance at 60Hz. Dimensions of Insulated Conductors Chapter 9, Table 8 calculations are based on conductors at 75ºC. 1–7. 12 (2) requires raceways to be sized properly in accordance with the NEC ®. , Electrical conductors installed in rigid metal conduit encased in concrete are considered ? . 6. Chapters 1–4 generally applies to all electrical installations. and more. The National Electrical Code chapter 9 provides conductor Chapter 9 Tables. 1 Wire. 2 NEC Chapter 9, Table 4, Dimensions and Percent Area of Conduit and Tubing (Areas of Conduit or Tubing for the Combinations of Wires Permitted in Table 1 Terms in this set (21) The use of Chapter 9, Table 1 for conduit fill allows the use of which additional tables in the notes to Table 1? Tables 4, 5, 5A, and 8. Bob Anchorite said: On table 8, page 70-625 of the 2002 NEC there is a listing of circular mils. 15 26. The NEC Chapter 9, Table 8, gives 1. 50 300 350 400 500 600 700 750 800 900 1000 12. 15(B)(3)(a), then Table 310. NEC Chapter 9 Tables. Chapter 9 Tables. 16 formerly Table 310. Table 5 Continued Type Size (AWG or Apr 26, 2020 · RACEWAY SIZES (CONDUIT AND TUBING) 1. Size. 10 0. Dimensions and Percent Area of Conduit and Tubing (See Chapter 9 Table 1 for allowed use of conduit area) Click the icons below to get our NEC ® compliant Electrical Calc Elite or Electric Toolkit for Android and iOS. , Chapters of the NEC are broad in scope and are subdivided into different ? to address the chapter scope. As you can see two conductors is the smallest maximum fill. _____. 10 AWG wiring has _____. Nec chapter 9 table 8 conductor properties. Table C. Study with Quizlet and memorize flashcards containing terms like A rigid fishing tool used for long conduit runs is known as a _____. , According to NEC Chapter 9, Table 8, solid wire is available up to size No. Alternating-Current Resistance for Alternating-Current. 759 0. May 24, 2011 · Note 6 of Table 1 provides you with instructions when working with combinations of conductors of different sizes, and refers you to Table 5 of Chapter 9 for the approximate cross-sectional area of each individual conductor. 2 for aluminum conductors. 261 5. To find line-to-line voltage drop they took 2. Proper Sizing of Conduits and Raceways. 157V. Mark Lamendola. Compact copper and AL building wire nominal dimensions and Areas. 4V (c) 9. 001 = 81. 6 AWG, Type UF copper cable is _____. When calculating the number of 10 AWG conductors that may be installed in a raceway, when the calculation results in a decimal of ? or greater, the calculated number can be Terms in this set (22) Table 1. For combinations of conductors of different sizes, use Table 5 and Table 5A for dimensions of conductors and Table 4 for the applicable conduit or tubing dimensions. 001, and then square the result to get circlular mils. CHAPTER 9 Direct-Current Resistance at 750C (167 OF) Copper Table 8 Conductor Properties TABLES Conductors Overall Diameter Size (AWG kcmil) 18 18 16 16 14 12 12 10 10 1/0 2/0 3/0 4/0 2. The percentage to use for conduit fill when installing one cable assembly with five conductors in the cable assembly is ? . 081/. Calculate to two decimal places. 0145 16 3. The new language in this section refers to that table, making its provisions enforceable by the AHJ. The preparation of PEC1 2017 started in 2016 and was completed in 2017, a more than one-year effort. Table 5A. Consider Table 2. 10 AWG wiring has, Using NEC table 310. Table 1 Percent of Cross Section of Conduit and Tubing for Conductors and Cables. 2020 Code Language: Chapter 9 Percent of Cross Section of Conduit and Tubing for Conductors and Cables. 8 = ºC. 3. 16, the ampacity of a No. Use the following formula (from the NEC, Table 8-Notes) to determine the resistance of 1,000 feet of #12 wire at 105°C. Table 5 Continued Type Size (AWG or Jan 20, 2017 · No. April 19, 2021. 73 x Z x I x L) / 1000 ---> for three phase system. 26 ohm/kFT. Diam (in) Area (in²) Table9_1 - Free download as PDF File (. 75A. 148 11. Flashcards NEC Chapter 9: Tables and the Informative Annexes | Quizlet. Conductor Properties. Z = impedance of the conductor per 1000 ft. Where conduit or tubing nipples having a maximum length not to exceed 24 inches are installed between boxes, cabinets, and similar enclosures, the nipples shall be permitted to be filled to 60% of their total cross-sectional area, and NEC Table 310. Study with Quizlet and memorize flashcards containing terms like A circular mil is a circle with a circumference of one mil. , Using NEC Table 310. Conductors of different size are calculated with table 5 chapter 9. Mar 20, 2014. In the past, this involved determining the circular mils for various conductors. 1 / 8. Fill requirements for rigid metal conduit are addressed in Section 344. 16. 1 in Annex C provides the maximum number of conductors or fixture wires permitted in electrical metallic The diagram shows conductors/cables lying in a conduit in sets of one, two, three and four. Table 4. You still have to use Table 1 along with Tables 4 and 5. , According to the NEC®, the minimum free conductor length required for making splices is _____. For conductors not included in Chapter 9, such as multiconductor cables, the actual dimensions shall be used. THW / THHW. Size (AWG or kcmil) XL (Reactance) for All Wires. 1 [ or 2017 NEC Chapter 9 Table 1 ], based on cross-sectional areas: A. 1: Table 1 is based on common condi‐ tions of proper cabling and alignment of conductors where the length of the pull and Chapter 9 Tables. pdf) or read online for free. txt) or read online for free. For instance, NEC Chapter 9 tables would not be appropriate for medium-voltage voltage drop calcs, as higher voltage circuits require thicker insulation, which increases conductor spacing. , A mil foot is one foot in length with a diameter of one mil. Inductive and capacitive components store energy. The math is straightforward: I = 16A Learn how to calculate voltage drop in electrical circuits and why it is important for equipment efficiency and safety. Chapter 8 stands alone unless it specifically references an earlier requirement. 0. NFPA 70-2017, like its predecessors, is the National Electrical Code (NEC) of the United States, striving for the ultimate goal of facilitating the safe installation table 8 DC NEC 2005 - Free download as PDF File (. They performed the following: Voltage drop (line to neutral) = 0. Dimensions and Percent Area of Conduit and Tubing. Table 9 Alternating-Current Resistance and Reactance for 600-Volt Cables, 3-Phase, 60 Hz, 75°C (167°F) - Three Single Conductors in Conduit. 67 TABLES. Click the icons below to get our NEC ® compliant Electrical Calc Elite or Electric Toolkit for Android and iOS. A check of Table 5 reveals the following information: 12 AWG THHN conductor = 0. Study with Quizlet and memorize flashcards containing terms like Table 1, Table 2, Table 4 and more. Total Area. It started with NEC 2014 as the basis, but in the end, adopted NEC 2017 which became available September 2016. Overall. What is the voltage drop of two 12 AWG THHN conductors that supply a 16A, 120V load located 100 feet from the power supply? (a) 3. NEC Chapter 9 Table 1: Percent of Cross Section of Conduit and Tubing for Conductors and Cables Conduit. 3808. In table 8 it shows that #12 awg has a diameter in inches of . Fine stranded cable has already been used with photovoltaic systems, so requirements similar to section 110. Dimensions of Insulated Conductors and Fixture Wires. 0106. 732 = 4. where: Vd = voltage drop. It’s based on common conditions where the length of the conductor and number of raceway bends are within reasonable limits [Chapter 9, Table 1, Note 1]. 486A-B is reproduced in chapter 9 table 10 of the 2011 NEC so this requirement can be applied in the field (see table “Conductor Stranding” located on page 2). (see NEC chapter 9 table 8 or 9) I = load current in amperes. I am doing voltage drop calculations. Table 8 is based on 75°C/167°F, and provides a k-factor constant of 12. 6. This section refers the user to Chapter 9, Table 1. Mar 12, 2023 · Here is an explanation of how to use Chapter 9, Table 9 in the NEC. Table 4 Dimensions and Percent Area of Conduit and Tubing (Areas of Conduit or Tubing for the Combinations of Wires Permitted in Table 1, Chapter 9) Article 358 — Electrical Metallic Tubing (EMT) Nominal Internal Diameter Total Area 100% 60%. AWG / KCMIL. Find out the NEC recommendations and requirements for voltage drop based on Fine Print Notes and rules. , If a conductor has a low resistance, it _____. 30 21. NFPA 731 Section 4. Some jurisdictions have a set policy regarding which table you should use for voltage drop calculations. Stranding. There are questions on the electrical journeyman's/ masters test that will pertain to thi When three conductors are pulled into a raceway, they may flatten out creating a condition where the conductors could jam. 454 0. 2V (b) 6. ) 53% raceway area for 1 conductor (a multiconductor cable is treated as a single conductor [Note 9]) B. 1: Table 1 is based on common conditions of proper cabling and alignment of conductors where the length of the pull and the number of bends are within reasonable limits. The difference in resistance is due to a temperature difference. CH15_Hickey 11/15/01 11:27 AM Page 15. Jan 28, 2022 · For this reason, the National Electrical Code (NIC) is revised every three years, with the latest edition being released as NFPA 70-2017 – National Electrical Code, 2017 edition. (5) For cables not included in the tables in Chapter 9, such as multiconductor cables, the actual dimensions of the cables shall be used in conduit fill calculations. The maximum is trade size 4 for IMC and trade size 6 for RMC [Sec. Internal Diameter. L = length in feet. For example, the City of LA wants you to use Chapter 9, Table 8 for #2 AWG or smaller, and Chapter 9, Table 9 for larger than #2 AWG. 11 (B). #6. So I would use table 9. NEC 2011 Chapter 9, table 1, shows that the maximum conduit allowance. Electrical reactance is a measure of the opposition to current flow from inductance or capacitance. Chapter 9, Note 9 previously stated that multiconductor cable, optical fiber cable, or flexible cord of two or more conductors is treated as a single conductor for calculating the percentage of 0. The Electrical Calc Elite is designed to solve many of your common code-based electrical Apr 19, 2021 · Chapter 9 of the NEC — Part 7. Ohms to Neutral per 1000 Feet. Understanding the layout will help you get a birds-eye view of the entire “realm” that this map is covering. 16 ohm * 150/1000 * 100A = 2. chapter 9 table 1. Wire 53%. just that. XHH / XHHW. 4V. Code Change Summary: Chapter 9, Note 9 was expanded to clarify the rules on calculating cables in a conduit or raceway. Conduit Sizing, NEC Chapter 9, Tables 4 and 5. That doesn’t seem correct to me. However, that table 9 on NEC says Three-Single-Conductors in Conduit. Free NEC 2005: Chapter 9 Table 8. 367 13. You aren’t required to use the Chapter 9 tables of the National Electrical Code (NEC), but they can be surprisingly useful. Dimensions of Insulated Conductors and Fixture Wires: SIZE: WIRE TYPE: AWG or kcmil Oct 15, 2019 · The formulas included here are based on conductor DC resistance values provided in Chapter 9 Table 8 of the NEC, and are viewed as generally acceptable for voltage drop calculations. Chapter 9 Tables Conduit fill requires calculation. 15(B)(16) Conductor Ampacities: Ampacities of Insulated Conductors with Not More Than Three Current-Carrying Conductors in Raceway, Cable, or Earth (Directly Buried) Chapter 9 Table 1: Conduit Cross-Section Percentage for Conductors: Percent of Cross Section of Conduit and Tubing for Conductors and Cables NEC 2008: Chapter 9 Table 8. To determine how much wire you can run in a given raceway: Find the raceway type and size you're running, in Table 4 of Chapter 9. However, NEC table displays only the readings for 75 degrees. In the NEC ®, there are two main locations (near the back Table 2. 0139 NEC Chapter 9 Table 4. 261 8. Feb. Table 1 Percent of Cross Section of Conduit and Tubing for Conductors and Cables Number of Conductors and/or Cables Cross-Sectional Area (%) 1 53 2 31 Over 2 40 Informational Note No. In this video we’ll show you how t 5046. 0348. And I'd put it in a spreadsheet to automate the process, or use one of the online calculators like Dennis suggested. Ohms to Neutral per Kilometer. 1000 = constant to compensate with "per 1000 ft" in impedance value. If you are bending 1-in. 2952. The NEC sets standards for the percent of volume that can safely be put into conduit. There are many tables in NEC Annex C, each of which is for a different raceway type. 7. ) Feb 2, 2021 · Chapter 9 of the NEC — Part 2. for impedances Apr 14, 2023 · The minimum trade size is 1/2-in. Mar 27, 2017 · My question is that after I calculate ampacity using Table310. 901. 8V. Using conductors having coated strands , different stranding type, and, especially, other temperatures changes the resistance. The appendices complete the Code. 93 ohms for the same piece of wire. Get a hint. Chapman Electric offers a selection of pipe and conduit to meet your electrical or underground project needs. Percent of Cross section of conduit and Tubing for conductors and cables. 08 2. 0172 RHH, RHW, CHAPTER 9 TABLES 70–716 NATIONAL ELECTRICAL CODE 2011 Edition. Conduit Size Calculator. in. 760. 14 can also be found in sections 690. For my project, I need to do calculations for various temperatures. Raceways must be large enough to permit the installation and removal of conductors without Mar 6, 2015 · Vd = ( 1. Back to Index of NEC Tables. 74 in the 2008 NEC. In the NEC ®, there are two main locations (near the back NEC Chapter 9 Table 4. 15(B)(16), the ampacity of a No. 6V (d) 12. 50 1500 1750 2000 Notes: mm2 0. . Table 1 sets the actual percentage fill rule, Table 4 gives you the area of the raceways, and Table 5 gives you the area of the conductors. Mar 4, 2018 · Stuck on NEC Chapter 9, table 8. Use Table 9 to determine electrical reactance values. NEC 2014: Chapter 9 Table 1. In the NEC ®, there are two main locations (near the back Chapter 9 Tables, Note 9. 8 — Number of The Same Size Conductors in Trade Size of Conduit or Tubing Liquidtight Flexible Metal Conduit (LFMC) Conductor Types THHN, THWN, THWN-2 (Based on Table 1, Chapter 9) 100% 80% (5) For conductors not included in Chapter 9, such as multi‐ conductor cables and optical fiber cables, the actual dimensions shall be used. Figure 5–1 Study with Quizlet and memorize flashcards containing terms like According to NEC chapter 9, Table 8, No. Jun 5, 2023 · Taking a look at NEC Chapter 9 Table 9 calculation example, they are using a feeder with 100A continuous load, 240V source, 3 phase with a circuit length of 150 feet. 355 0. I am using VD=L*R*I/1000 where R values are from Table9 in NEC. According to NEC Table 310. - NEC 2014, Chapter 9 – “Tables”, Table 9 – “AC Resistance & Reactance” Table 9 - AC Resistance/Reactance Note that the actual table states “Uncoated Copper” Study with Quizlet and memorize flashcards containing terms like Tables located in Chapter 9 apply only where ? . Informational Note No. Article 358 - Electrical Metallic Tubing (EMT) Metric Designator Trade Size Nominal Internal Diameter Total Area 100% 60% 1 Wire 53% 2 Wires 31% Chapter 9 Table 4 — Conduit Dimensions. 31 3. Apr 6, 2021 · Chapter 9 of the NEC — Part 6. For example, Table C. Notes to Tables. 342. NEC Table 310. NEC 2014: Chapter 9 Table 4. Table 9 provides AC resistance and reactance information for both copper and aluminum conductors based on conductor type and size, and the type of conduit used for the raceway. It is titled “ Table 9 Alternating-Current Resistance and Reactance for 600-Volt Cables, 3-Phase, 60 Hz, 75 Free NEC 2014: Chapter 9 Table 5. 1. 20]. Mar 27, 2010 · NEC Chapter 9 said: These resistance values are valid only for the parameters given. 823 0. LINE QTY SIZE TYPE AREA TOTAL AREA; 1 NEC 2020 Compliant. If you would like to see how the values change when the temperature changes, enter a new temperature value in the input box below. This document provides tables related to conduit and tubing dimensions from Chapter 9 of the National Electrical Code (NEC). Since my length of wire is long, I am considering there is voltage drop. Wires 31% Metric Designator Trade Size mm. Sep 10, 2006 · Sep 10, 2006. 819. Quizlet has study tools to help you learn anything. #2. NEC 1999: Chapter 9 Table 4. EMT with a one-shot bender (manual) or a full shoe (machine), what is the Mar 20, 2014 · Electrical Engineer. February 28, 2021. Using the NEC code book. Tables 4, 5, 5A, and 8. Table 9 Alternating-Current Resistance and Reactance for 600-Volt Cables, 3-Phase, 60 Hz, 75°C (167°F) — Three Single Conductors in Conduit. The Electrical Calc Elite is designed to solve many of your common code-based electrical calculations like wire sizes, voltage drop, conduit sizing, etc. 18 3. The table specifies separately impedance, reactance, and resistance. 823 1. The use of Chapter 9, Table 1 for conduit fill allows the use of which additional tables in the notes to Table 1? Click the card to flip. Tables at the end of Chapter 9 help when working with Art. 367 8. Website by 5. 22. Conduit Wire Fill Charts & Tables. The below chart is from Table 1 in Chapter 9 of the National Electric Code. 573. Cable properties DC NEC 2005 table 8 chapter 9 NEC Chapter 9 Tables - Free download as PDF File (. Dimensions and Percent Area of Conduit and Tubing (See Chapter 9 Table 1 for allowed use of conduit area) Electrical Metallic Tubing. 31 1. 4V * 1. Video covering the NEC Chapter 9 Tables as well as Annex C. Note (4). Method, which is divided into: Circular-mils method, chapter table method (9). Percent of Cross Section of Conduit and Tubing for Conductors and Cables. 4- Approximate Mathematical Method, 5 Jun 1, 2004 · R = Conductor resistance, Chapter 9, Table 8 for DC or Chapter 9, Table 9 for AC; Let's do a sample calculation using the Ohm's Law method. Click the card to flip 👆. 100%. Raceways, conduits and tubing are not always used with security system wiring but if they are, the raceway conduit or tubing must be sized according to the NEC ®. Conduit Fill Tables – NEC Table C Conductor Size – Awg / Kcmil – XHHW SIZE 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 250 300 350 400 500 600 750 Notes to Tables in Chapter 9 of the NEC: (3) Equipment grounding conductors shall be included in conduit fill calculations. April 6, 2021. Looking back to the diagram, this is due to the two conductors or cables forming an oval, rather than a circle. Table 2 provides minimum bend radii for Mar 24, 2020 · This calculation will explain how to find the distance of a conductor. NEC Chapter 9 Table 4. DC Resistance at 75C (167F) (AWG or kcmil) Area. 4. 9 for copper, and 21. The Electric Toolkit provides some basic Study with Quizlet and memorize flashcards containing terms like According to NEC Chapter 9, Table 8, No. pdf - Free download as PDF File (. New Temperature in ºC, "T 2" NEC Chapter 9 Table 4. Dec 9, 2021 · To start out, the NEC is layed out in a specific way. Jan 2, 2024 · NEC Chapter 9 Table 9. Insulation Type. THHN / THWN. Jan 16, 2012 · Table 8 is a DC resistance, and it looks like the value for #12 is slightly lower than the AC resistance given in Table 9. Click Subscribe above. Chapter 5–7 supplements or modifies the information in Chaps. 31 5. Thread starter Tainted; Start date Jan 2, 2024; Tainted Senior Member. 136 9. S. 1. Table 1 gives permissible fill percentages for conductors in conduit and tubing. NEC Chapter 9 Table 4: Dimensions and Percent Area of Conduit and Tubing: EMT (Electrical Metallic Tubing) Apr 6, 2021 · Table 9 Alternating-Current Resistance and Reactance for 600-Volt Cables, 3-Phase, 60 Hz, 75°C (167°F) — Three Single Conductors in Conduit. I was taught that to find circular mils one takes the diameter in inches and divide that by . ) Raceway Sizing There are three options for sizing raceways according to 2017 PEC Table 10. I am trying to do the calculations from R2 = R1 [1 + α (T2 − 75)]. 344. 15(C)(1) adjustment Study with Quizlet and memorize flashcards containing terms like According to NEC Chapter 9, Table 8, No. 08 3. Feb 28, 2021 · Chapter 9 Tables. This reference to Table 1 in Chapter 9 allows for the use NEC Chapter 9 is used for combinations of conductors of different sizes or insulation types installed in the same conduit or tubing. ) 31% raceway area for 2 conductors C. Class 2 and Class 3 Alternating Current Power Source Limitations. (4) Conduit nipples are permitted to be filled up to 60%. Why Table 2 and Table 4 are helpful. it fr yy du xw jq pm ys gj mn