electrical code calculations level 1 lesson 1

100 The correct answer is: 550.32 (C) The neutral is permitted to be used as the equipment grounding conductor for an electric range in a mobile home. 4/0 AWG FEP copper, 2 AWG Z copper-clad aluminum 198 A 2. It also analyzed reviews to verify trustworthiness. a. In one-family, two-family, and multifamily dwellings, all general-use receptacle outlets of ? The K value for copper and aluminum is what? The correct answer is: solid fixed barrier of a material compatible with the cable traybarrier of a material compatible with the cable tray, The total difference between the minimum winter and maximum summer temperatures a cable tray system may be subject to must be considered to account for thermal expansion and contraction. All of the conductors are current-carrying conductors. Your email address is only used to allow you to reset your password. 430.32A. Versus demand load. When sizing OCPD for motors, if adjustable, what should they be set at? TF, Branch-circuit conductors supplying information technology equipment shall have an ampacity of not less than ? Under no condition shall the service entrance conductors for a manufactured building be installed before the erection of the building at the building site. If the equipment is not marked, it is 60 Celsius rated for 100 amps and less. Mike Holt's Understanding the National Electrical Code, Vol. Prep for a quiz or learn for fun! The conductors are 10 AWG THHN copper. table 430.52 does this. Using Table 310.19, identify the correct ampacity for these insulated conductors. Study Code, Standards, and Practices 1, Based on the 2020 NEC Online Materials: Lesson 6 Understanding Conductor Insulation and NEC Specifications flashcards from Jesus Felix's class online, or in Brainscape's iPhone or Android app. this is the same formula for both KW and KVA. . True Electricity & Electrical Technology Practice all cards When branch-circuit and feeder loads are calculated, which of the following nominal system voltages is not used unless specified? Three 8 AWG THW copper conductors are installed in the same raceway for use as equipment grounding conductors. This is an acceptable installation according to the Code. 1. and ground fault protection by the use of OCPD's such as fuses or circuit breakers. The NEC 210.62 requires one outlet per 12 linear feet. The true power (watts) of a single-phase circuit or load that contains inductance or capacitance can be calculated by the use of the following formula: Rememember that P/E=I. What size RHW aluminum conductors are needed? 2nd Year Core Curriculum. A 3-conductor 8 AWG copper Type MC cable is installed in an area with an ambient temperature of 96F. The installation consists of three single insulated conductors in electrical metallic tubing, Type EMT. clothes dryer at 5kVA or nameplate, whichever is bigger. Apprenticeship Training Program Orientation. 300.5(B) classifies the interior of underground raceways as a wet location. When a recreational vehicle has only one 20-ampere branch circuit, it shall be GFCI protected. Remember: 4 or more requires temperature derate as well as number of conductors requires derate. AC Theory, Level III - 3rd Ed. The multiwire branch circuits are supplied by a 4-wire, 3-phase, wye-connected system. The NJATC, or National Joint Apprenticeship and Training Committee, is the former name of the Electrical Alliance, a nonprofit organization created by the International Brotherhood of Electrical Workers and the National Electrical Contractors Association. In this type of building when the number of general purpose outlets are not yet determined, you must add 1VA per square foot to the building calculation per 220.14K and fine print not B in the table. What is the calculated load for the general lighting of a 24,000-square-foot one-family dwelling? More than 3 current carrying conductors in the raceway or cable. in an elevated ambient temperature and a raceway OR CABLE longer than 24 inches uses what formula? The load for each laundry branch circuit required in a dwelling unit is calculated at ? Usually the AC unit. these cable clamps, support fittings, and devices are counted how? Call Today and Save! The recommended voltage drop for a branch circuit is what percent? what is the formula for KW in a 3 phase circuit when the voltage and current is known? (Note: The term "basic rule," as used here, indicates that exceptions or other conditions do not apply.). PP68. watts= HP/746; whereas, output watts accounts for losses.. When determining the maximum number of conductors allowed in a standard trade size conduit or tubing all the same size, we use what table? A(n) ? Arbitration and Conciliation (Amendment) Ordinance, 2020. physical agent modalities & process of applying a modality, Electrician Apprentice - Level 4 - Canadian, 1st Year Apprenticeship Final (Cumulative), ARE 5.0 PDD - Project Development & Documentation. . The power supply to a mobile home shall generally be a feeder assembly consisting of not more than one listed ? (Hint: The Code refers to these loads as noncoincidental loads.). Three 1/0 AWG XHHW-2 aluminum conductors are installed in a rigid metal conduit, Type RMC, in an ambient temperature of 105F. 5000VA or the nameplate, whichever is larger. All of the conductors are current-carrying conductors. The neutral is permitted to be used as the equipment grounding conductor for an electric range in a mobile home. The maximum number of 10 AWG THHN aluminum conductors permitted in a four-inch by 11/2-inch octagonal box by Table 314.16(A) is ? 2HP and 300 volts or less in this situation allow the disconnecting means to be this. Table 310.16 lists the ampacity of a 10 AWG THHN copper conductor at ? What is the formula for VD in a 3 phase circuit? LEFT ARROW - move card to the Don't know pile. 2017 Master Electrician Exam Questions and Study Guide- Ray Holder. 8 times the trade diameter of the LARGEST raceway entering the box. 2017 Master Electrician Exam Questions and Study Guide- Ray Holder. . The appendix renders proper resolution of solutions to problems contained within the book using the "ElectricCalc Pro" calculator--also sold on Amazon.com. Three single insulated conductors are installed in a conduit that is run through an area with an ambient temperature of 110F to supply a calculated load of 65 amperes. The three most common insulated conductor temperature ratings associated with Table 310.16 are ? the OCP can be determined using the 125% of the continuous (over 3 hours run time) and 100% of the non-continuous. receptacles. TF. Questions and Study Guide- Ray Holder.PP11. The ampacities listed in Table 310.16 are based upon an ambient air temperature of ? The demand factors in table_______ shall be permitted when sizing feeders and service entrance conductors for electric clothes dryers in residences. 2017 Master Electrician Exam Questions and Study Guide- Ray Holder. table 314.16A does not account for devices or fittings for fill in the box. ratio of maximum demand of a system/ total connected load. , and 240.4(D)(5) limits the overcurrent protection to ? THWN aluminum at 92F ambient, TW copper at 25C ambient 1.08 Six 4 AWG THW copper conductors are installed in the same raceway in an ambient temperature of 30C. Pre-galvanizing is the most widely used coating for steel cable tray. PP66. F. 2017 Master Electrician Exam Questions and Study Guide- Ray Holder. The calculated load for a 3-phase, 480-volt circuit is 98 amperes. All of the conductors are current-carrying conductors. For other than motor starting service, insulated conductors installed between a resistive element and a controller shall have an insulation with an operating temperature of not less than ? . Two "A" phase conductors, two "B" phase conductors, and two neutrals are installed as two 3-wire multiwire branch circuits of a 120/208-volt system. What is the formula used for a commercial building when the number of receptacles are known? The ampacities of Table 310.17 are for an ambient temperature of ? Ampacity Tables 310.18 and 310.19 apply to conductors that have an insulation rating ranging from 150C to ? A box five inches square and two inches deep has a total volume of ? What must be remembered for the nuetral? The temperature rating of Type THWN insulation is ? 2 AWG Z copper-clad aluminum What is the ampacity of this conductor now that it is connected to this circuit breaker? 4 GND in a 2-in. Calculate each load and determine which single load will be used for the feeder demand. Chapter 9 table 1 is used for this type of conductor and conduit fill calc. it has more recently been found in ___, utility distribution and transmission field. NJATC workbook answer keys are found online at TriciaJoy.com and WPraceTech.com as of 2015. Each patient bed location in a critical care area of a hospital shall be equipped with a minimum of ? current, in amperes, that a conductor can carry continuously under conditions of use without exceeding its temperature rating. CHAPTER 02 - Preparing for Promotion, Fire Officer NFPA 1021 - Jones & Bartlett (Third Edition), CHAPTER 03 - Fire Fighters and the Fire Officer, Fire Officer NFPA 1021 - Jones & Bartlett (Third Edition). b. The feeder demand (line) load for a 5.5 kW, 120/240-volt electric dryer in a dwelling unit is 5,500 volt-amperes. BS: Lesson 2 - Water Supply & Drainage Systems. What is the ampacity of this conductor now that it is connected to this circuit breaker? 2 AWG TFE nickel, 1 AWG Z copper 186 A This exceptoinin 210.20(A) allow a load to have the OCP rated at 100% if the load is rated for continuous operation. regarding feeders and barnch circuits for motors, what happens with OCPD sizing? Capacitors shall be enclosed in vaults or outdoor fenced enclosures in compliance with the applicable provisions of Article 110 when they contain more than ? If a conductor does not leave the box they are counted as how many conductors? PVC conduit? Note: Transformer vaults are required to have personnel doors which swing out and are equipped with devices which are normally latched, but open under simple pressure such as panic bars.. Considering all various conductor insulation types, the minimum size AWG copper conductor permitted to serve the load is ? A nursing home providing 24-hour care for four patients or fewer is not considered a health care facility. . THHN copper at 120F ambient 0.82 Then tap the card to flip it. 2017 Master Electrician Exam Questions and Study Guide- Ray Holder. Calculate to the nearest ampere. Many conductors are rated how? ConceptualPhysics-Heat,Temperature,andEnergy, Language Art-PSSA Review: The Grammar Games-Word Wars. Each conductor of a 3-conductor (3/C) armored cable (Type AC) assembly using 10 AWG insulated copper conductors with 75C insulation has an ampacity of ? 220.61(B)1. For a residential calculation a minimum of how many small appliance branch circuits are required? If you've accidentally put the card in the wrong box, just tap on the card to take it out of the box. Or 5% total for branch and feeders, which proposes an assumed 2% for feeders. Insulated and bare refer to what tables? The following conductors are the same AWG size and have the same THW insulation, but are made up of different conductor materials. Chapter 9 table 8 is where this can be found. An EMT raceway contains two 3-phase, 480-volt branch circuits. What is the formula for KVA or VA when the current and voltage is known for 3 phase electrical systems? . The branch circuits consist of eight 10 AWG THWN copper conductors installed in EMT in an ambient temperature of 86F. A thermal barrier shall be installed between resistors and combustible material when the distance is less than ? The neutral conductor of a 2-wire, single-phase circuit supplying a household refrigerator is considered to be a current-carrying conductor according to the provisions of Table 310.15(C)(1). Do the equipment or grounding conductors get counted when calculating permitted conduit or raceway fill? Calculate to the nearest ampere. Using only Table 310.16, identify the correct ampacity for these insulated conductors. 2017 Master Electrician Exam Questions and Study Guide- Ray Holder. The two conduits are threaded wrench tight into the T, and each of these conduits is supported within 18 inches of the conduit body. Per this part of the NEC. 15-50 amps. How do you find amps when using 3 phase and you know the KVA? What is the minimum size THHN copper conductor (of at least equal ampacity) required to fulfill this replacement? Use these flashcards to help memorize information. Calculate to the nearest ampere. THW aluminum at 40C ambient 0.88 Generally lighting loads will be supplied by what size OCP? The square root of 3 represents what in a 3 phase circuit? Based on a 175-ampere residential single-phase, 3-wire service sized in accordance with 310.12, determine the minimum-size grounding electrode conductor for this service. TriciaJoy.com also features an instrumentation textbook and an orientation workbook. Full versions of the NJATC instrumentation workbook answers are available for download as PDF files, as is the basic electronic workbook. rating or less are included in the general unit load calculation of 220.14(J). for each dryer. Remember when you divide, you will get a larger number. Electrical Code Calculations, Level I, Based on the 2020 NEC Item Code:J227LM.L1 Core Curriculum Year: 5 Core Credits Advanced Credits 1.0 Course Prerequisite(s): Code, Standards, and Practices 2, Level II Other Prerequisites: None Required Material(s): . When sizing branch-circuit loads for a single branch circuit supplying a counter mounted cooking unit and not more than 2 wall mounted ovens, it is permissible to do what? What is the feeder (neutral) demand load in volt-amperes for this electric dryer? this is the temperatures of 30 deg. How many 14 AWG THWN conductors are permitted in a Type V500 surface metallic raceway? 1 (textbook), 2020 NEC, DEWALT Electrical Code Reference: Based on the 2020 NEC | 5th Edition, Illustrated Guide to the National Electrical Code 2020 8th Edition, Electrical Wiring Industrial 17th Edition Based on NEC 2020, Electrical Wiring Residential 2020 NEC Ray C. Mullin/Phil Simmons, Electrical Wiring Commercial, 17E Ray C. Mullin, Phil Simmons NEC 2020, Electrical Grounding And Bonding, 6th Edition, Journeyman Electricians Exam Preparation Based on the 2020 NEC, Master Electricians Exam Preparation Based on the 2020 NEC, Mike Holt's Changes to the National Electrical Code (textbook), 2020 NEC, Mike Holt's Understanding the 2020 National Electrical Code, Volume 1 Workbook, Mike Holt's 2020 NEC Requirements for Solar Photovoltaic Systems (textbook), Mike Holt's Journeyman Practice Exam, 2020 NEC, Applied Codeology Navigating the NEC 2020, heating ventilation and air conditioning (HVAC) contractors. 2003-2023 Chegg Inc. All rights reserved. Determine the ampacity of the 3/0 AWG conductors for this application. solid fixed barrier of a material compatible with the cable tray. Job Info 1, lvl 2 lesson 1 Flashcards | Chegg.com Job Info 1, lvl 2 lesson 1. When determining the amount of VA for banks and office building when the number of general purpose outlets to be installed has not been determined, what must be done for the purpose of calculations? INPUT WATTS/EFFICIENCYis correct. The following conductors are installed open in free air, with an ambient temperature of 40C. How many receptacle are required for 14 linear feet of show window? All are counted as one device based on the largest wire size in the box, except devices, which count as two. Step 4 for a residential calculation is what? Table 310.17 applies to the single insulated conductor installed in free air where the heat generated within the conductor can be more easily dissipated than where the same insulated conductor is enclosed in a raceway or cable jacket. Calculate to the nearest ampere. PP139. fixed electric space heating is what type of load? What is step 5 in a residential calc? Receptacles rated at 50-amperes for recreational vehicle park site distribution shall be supplied from a ? Please try again. Calculate to the nearest ampere. These are considered a continuous load unless stated otherwise. The true power (watts) of a single phase circuit or load that contains inductance or capacitance can be calculated by the use of the following formula. volts to ground. . In general, the ampacity of the conductors from the generator terminals to the first overcurrent device shall not be less than ? PP48. listed hospital grade or be designed to prevent ? The most common nominal battery voltage for a lead-acid battery is ? the ampacity of a 3 wire single phase service and feeder conductors 100-400 amps must be rated how? must be installed to separate the cables, unless the cables operating at over 600 volts are Type MC. Print length 300 pages Publisher NJATC Publication date January 1, 2011 ISBN-10 193594102X ISBN-13 978-1935941026 from the mobile home it serves, when the service equipment is not located adjacent to the mobile home. 83% minimum size for these at this location. Does the 75% residential rule for 4 or more fastened in place appliances include space heaters, dryers, ranges, or air conditioning equipment? single insulated current-carrying conductors installed in a raceway. Control circuits are considered to be current-carrying conductors according to the provisions of Table 310.15(C)(1). The load for each small-appliance branch circuit required in a dwelling unit is calculated at ? A fitting is defined as an accessory, such as a locknut, bushing, or other part of a wiring system, that is intended primarily to perform a(n) ? . Using Table 310.17, identify the correct ampacity. branch circuits size up and feeders round down. . Training Bulletins, Memos and Training Index (74 Questions). Electrical Code Calculations, Level 1; Lesson 1-3 Ti 3rd year - Code, Standards and Practices 3, Level 1; Lesson 7-9 & test FRI FRI. Sun Mon Tue Wed Thu Fri . . when calculating the number of branch circuits for lighting needed in a commercial building like a mercantile, or showroom, what must be remembered? of the total connected load. we disregard the length of the wireway or gutter. Twelve 12 AWG THHN copper conductors are installed in a one-inch EMT in an ambient temperature of 32C. What NEC article has demand factors for household cooking appliances? The customer has decided to use the minimum size service. of the rated current of the capacitor. Calculate to the nearest ampere. All of the conductors are current-carrying conductors. All receptacles installed at the patient bed location in a general care area shall be ? You must use both columns A and B in table 220.55 and add them together if both columns apply. Click the card to flip Maximum Click the card to flip 1 / 34 Flashcards Learn Why might a higher temperature rating conductor be used on lower temperature rated terminations? What minimum size THHN branch circuit conductor is required for one of the circuits when it supplies a noncontinuous load of 27 kW? 8'. Identify the document that provides suggested support locations for cable tray fittings. PP67. What is the minimum number of 120-volt, 20-ampere lighting branch circuits needed for a 1,800-square-foot dwelling unit? P/E(1.732)=I is another way of viewing this formula. you must round up for this number of circuits calculation. 4/0 AWG FEP copper 346 A regarding disconnecting means and OCP for continuous duty motors, what will be used? Twenty 10 AWG THWN aluminum current-carrying conductors are installed in the same conduit in an ambient temperature of 30C. where installed in accordance with Article 470. Total service or feeder demand for these three appliances after appliance demand factor is applied. What is the calculated line lighting feeder demand load for a 2,400-square-foot dwelling unit, including small-appliance and laundry loads? Introduction to Electric Distribution Grids. Using an ampere load of 165 amperes, determine the minimum-size 120/240-volt, single-phase, 3-wire service. The correct answer is: 550.16(A)(1), The neutral is permitted to be used as the equipment grounding conductor for an electric range in a mobile home, False Electrical Code Calculations lvl 1 Lesson 4 - Identifying Boxes and Fittings 5.0 (1 review) A fitting is defined as an accessory, such as a locknut, bushing, or other part of a wiring system, that is intended primarily to perform a (n) ? . Using only Table 310.16, identify the correct ampacity for these insulated conductors. This is similar to load VA/ circuit VA. What type of cord connected equipment is used to determine the number of branch circuits for multi-outlet assemblies installed in commercial, industrial, and educational locations? What is the minimum size THHN copper conductor (of at least equal ampacity) required to fulfill this replacement? A portion of the installation instructions is reprinted in the Information Sheet for this lesson. and the temperature rating of Type THWN-2 is ? Using Type THWN copper for the service conductors, determine the proper conductor size for a new 175-ampere dwelling unit with a single-phase service. The calculated load for a 3-phase, 240-volt load is 196 amperes. Total feeder demand for these four appliances after appliance demand factor is applied. a. The cable is installed in accordance with 300.11. And what would be the formula if you could. 4 AWG THHN copper 140 A Code Calculations, Level I, Based on the 2017 NEC Student: $21.51 Item Code: J227LM.K1_CC Course Credits:1 Course Level:1 Prerequisite Courses: Code and Practices 3, Level I, Based on the 2017 NEC Required Materials: Code Calculations Textbook - 2017 Electrical Systems Textbook National Electrical Code - 2017 demand load is the given demand at any given instance of a system or appliance. An outdoor mobile home service disconnecting means is located 12 inches above ground level. 1 AWG Z copper Identify and match the following conduit bodies to their correct term. versus demand factor where not all of the loads are used at the same time. b. EVJ Help others learn more about this product by uploading a video! How does this effect ampacity and derate. Where different temperature limitations of individual components are applied to a single circuit, the principle of the ? PP87. Type AC cable is used as a branch circuit to supply receptacles for information technology equipment. There are transformer designs which do not require a 12" separation from combustible materials of buildings. From the list below, select the three Celsius and Fahrenheit insulation temperature ratings listed in Table 310.16. When the rating of a cooking appliance falls under both column A an B, you must do what? Considering all various conductor insulation types, the minimum size AWG aluminum conductor permitted to serve the load is ? NEC Sec. The installation consists of three single insulated conductors in electrical metallic tubing, Type EMT. remember if they are not all the same size we use note 2 column C of T220.55. 2017 Master Electrician Exam Questions and Study Guide- Ray Holder. PP 48. if the OCPD is over 800 amps we round down per NEC240.4(c), 2017 Master Electrician Exam Questions and Study Guide- Ray Holder. If you knew the answer, tap the green Know box. Calculate to the nearest ampere. Click the card to flip mechanical 100 Click the card to flip 1 / 23 Conductor Material and Sizes - Section 4. Chapter 1 - Legislation & Codes for Power Engineering, Chapter 2 - Code Calculation (ASMSE Section I), Criminal Procedure and Investigations Act (CPIA) 1996. Hint: Check 334.80 before answering this question. TF, Article 450 covers the installation of all transformers. Ampacity Tables 310.18 and 310.19 apply to conductors that have an insulation rating ranging from 150C to ? a. current these temps are the ___ temp the conductor can experience over its entire length. We must add 3 zeros for this cross sectional number size. . The temperature correction factor portion of Table 310.15(B)(1) indicates that as the ambient temperature increases, the ampacity of the conductor increases. Calculate the line lighting feeder demand for a 16,000-square-foot dwelling unit, including small-appliance and laundry loads. for this method of calculating a residential service you simply add the nameplate values of the equipment together and apply one demand factor. . The plans for a one-family dwelling show that a five-horsepower, 240-volt, single-phase air conditioning unit and a 5 kW fixed electric space heater are to be installed using the same feeder circuit. Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them. 220.54. What is the ampacity of these conductors now that they are connected to this two-pole circuit breaker? Read the installation information for this situation and determine whether the installation is acceptable or a violation of Section 314.20. Single insulated 2 AWG THW copper conductors installed in a raceway in an ambient air temperature of 30C will have a lower ampacity than when installed as open conductors in free air at the same ambient temperature of 30C. what are the three classifications of conductors? for single phase. National Joint Apprenticeship and Training Committee, Code Calculations, Paperback. According to NEC314 an angle U pull, the proper size junction box shall be what? This table is used to size a box when all the conductors are the SAME SIZE. The 90C rating is for dry locations only. what letter designation indicates conductors listed for use in wet locations? The following conductors are installed open in free air, with an ambient temperature of 30C. ___ is the strongest but is difficult to bend, so its uses are limited, hard drawn, medium-hard drawn, soft drawn. Which annex in the NEC is used for conductors all of the same size in conduit and tubing? Calculate to the nearest ampere. A commercial parking garage used only for parking vehicles which operate on volatile flammable liquids is ? PP63, 12KW as a minimum if any one range is smaller than 12KW but greater than 8.75KW, 2017 Master Electrician Exam Questions and Study Guide- Ray Holder. The formula for determining the number of general lighting branch circuits in an office building is what? Determine the ampacity of six 8 AWG THW copper conductors installed in EMT in an ambient temperature of 30C. TF, False this is not the same as it is for commercial office buildings; such as, stores, banks, restaurants, etc. A useful formula that may be used to size conductors in a 3 phase circuit to prevent excessive voltage drop is? , and 240.4(D)(7) limits the overcurrent protection to 30 amperes. Ch3_PHYS 6001 - SI Units (Chp 3) Flashcards Preview, Ch1_CODE 6017 - Boiler and Pressure Vessels Act (Chp 1) Flashcards Preview, Station/Equipment Disinfection/Decontamination Procedures. The ohms law method for determing the voltage drop of the conductor works for what type of circuit? Illustrated Catastrophes: Questionable Wiring Methods, Code Quiz: GFCI Protection for a Receptacle Supplying a Fixed or Stationary Appliance, EC&M Tech Talk Video Medium-Voltage Conductors and Cable, Monthly Quiz: Grounding and Bonding Connections. Determine the ampacity of three 8 AWG THWN copper conductors installed in EMT in an ambient temperature of 40C. The ampacity of the capacitor circuit conductors for a capacitor bank shall not be less than ? d. SJO. Determine the ampacity of the copper circuit conductors. The calculated load for a 3-phase, 480-volt circuit is 98 amperes. If the termination's ampacity is not stated then we assume it is what temperature rating? dividing smaller by larger numbers always give the percentages. The multiwire branch circuits are supplied by a 4-wire, 3-phase, wye-connected system. 2 AWG TFE nickel 191 A, The following conductors are installed open in free air, with an ambient temperature of 40C. 450.22 PP101. Using Table 310.19, identify the correct ampacity for these insulated conductors. The following conductors are the same AWG size and are made up of the same copper conductor material, but have different types of insulation. Understanding The NEC 2020 Mike Holt V.1 V.2 Combo with Softbound Code, Colored Tabs & Quick Formula Guide 11% DISCOUNT! See the answer below. . These twelve conductors are comprised of three 4-wire multiwire branch circuits. TX Admin Code: TITLE 22, PART 23, TX REAL ESTATE COMM. A door knob operated by turning and pushing to open the door is not permitted on the personnel exit door of a transformer vault doorway. . However this requires the linear foot method calculation. When calculating demand facgors for ranges of unequal ratings of 8&3/4 through 27KW, when the nameplate rating of any range less than 12KW you are to use what? remember that in a 3 phase system we use 1.732 next to E. the formula for the number of circuits is what? 8 AWG PFAH nickel-coated copper 142 A QuickPass 2020 Journeyman Electrician Exam Study Guide Combo 15% Discount! THHN copper at 120F ambient Using Table 310.17, identify the correct ampacity. Each conductor of a 3-conductor (3/C) armored cable (Type AC) assembly using 10 AWG insulated copper conductors with 75C insulation has an ampacity of ?

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