Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Chapter 4, Problem 37R
To determine
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Isc = __________; MVAsc = __________
Enumerate and discuss the standard criteria to be considered when designing overhead pole lines to minimize the visual impact of the line to the public.
2.a. What's defined as an assembly consisting of a service raceway, guy wires or braces, service head, andany fittings necessary for the termination and support of overhead service conductors?A. Drip loopB. Service lateralC. Service dropD. Service mast
2.b. What's likely to happen when connected parallel conductors are different lengths?A. An NEC violationB. Misidentification of conductor cablesC. An uneven distribution of currentD. Conductor termination
Chapter 4 Solutions
Electrical Wiring Residential
Ch. 4 - The largest size solid conductor generally...Ch. 4 - What is the minimum branch-circuit wire size that...Ch. 4 - What exceptions, if any, are there to the answer...Ch. 4 - What determines the ampacity of a wire?Ch. 4 - What unit of measurement is used for the diameter...Ch. 4 - What unit of measurement is used for the...Ch. 4 - What is the voltage rating of the conductors in...Ch. 4 - Indicate the allowable ampacity of the following...Ch. 4 - Prob. 9RCh. 4 - What are the colors of the conductors in...
Ch. 4 - For nonmetallic-sheathed cable, may the...Ch. 4 - Prob. 12RCh. 4 - Under what condition may nonmetallic-sheathed...Ch. 4 - a. What is the maximum distance permitted between...Ch. 4 - Prob. 15RCh. 4 - Prob. 16RCh. 4 - Prob. 17RCh. 4 - Prob. 18RCh. 4 - Prob. 19RCh. 4 - Circle the correct answer to the following...Ch. 4 - When running Type NM cable through a bored hole in...Ch. 4 - Where is the main service-entrance panel located...Ch. 4 - Is it permitted to use flexible metal conduit over...Ch. 4 - Liquidtight flexible metal conduit may serve as a...Ch. 4 - It is permissible for an electrician to connect...Ch. 4 - Terminals of switches and receptacles marked...Ch. 4 - Wire connectors marked AL/CU are suitable for use...Ch. 4 - A wire connector bearing no marking or reference...Ch. 4 - When Type NM cable is run through a floor, it must...Ch. 4 - When nonmetallic-sheathed cables are bunched or...Ch. 4 - In diagrams A and B, nonmetallic-sheathed cable is...Ch. 4 - The marking on the outer jacket of a...Ch. 4 - A 120-volt branch circuit supplies a resistive...Ch. 4 - In problem 35, it is desired to keep the voltage...Ch. 4 - Prob. 37RCh. 4 - The allowable ampacity of a 4 AWG THHN from Table...Ch. 4 - If, because of some obstruction in a wall space,...Ch. 4 - The recessed fluorescent luminaires installed in...Ch. 4 - Prob. 41RCh. 4 - What size overcurrent device protects the...Ch. 4 - May the 20-ampere small-appliance branch circuits...Ch. 4 - A 30-ampere branch circuit is installed for an...Ch. 4 - In many areas, metal framing members are being...Ch. 4 - Are set screwtype connectors permitted to be used...Ch. 4 - Most armored cable today has 90C conductors. What...Ch. 4 - If you saw two different types of SE cables, how...Ch. 4 - Circle the correct answer defining the type of...
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- Some electricians do not bother to calculate the minimum size of neutral service conductor. They size the minimum ungrounded conductor size and then use this information to determine the minimum neutral conductor size. Explain how they determine the minimum neutral size using the minimum ungrounded conductor sizarrow_forwardQUESTION 3 The power system network is shown in Figure 3. The magnitude of voltage at bus 1 is adjusted to 12 0° per unit, buses 2 and 3 are the load buses. Line impedances are marked in per-unit on 100 MVA base and the charging susceptances are neglected. Determine the bus voltage at load 2 and 3 using the Gauss-Seidel iteration method (accurate to four decimal places). Perform calculation for two iterations. jo.033 P= 400 Mw HQu= 320 MVar Vi = 120° Figure 3 10.05 +P= 300 MW 70.0125 +QF 270 MVararrow_forwardCount the neutral conductor of a 4-wire, 3-phase, wye-connected circuit when the major portion of the load is electric discharge lighting (fluorescent, mercury vapor, high-pressure sodium, etc.), data processing, and other loads where the neutral conductor carries a. grounding b. traveler C. d. current. third harmonic unbalanced conductors to overheat but often overlooked is the possibility ofarrow_forward
- Overcurrent devices are generally not permitted on the ____ conductor. a. ungroundedb. phasec. groundedd. dual-ratedarrow_forwardwrite down the factors considered for selection of conductor for overhead LT distribution line. briefly in 65 wordsarrow_forwardplease help me all options is solved step by step thank youarrow_forward
- 2. What's the primary instrument for locating a break in a cable during emergency maintenance?A. OSAB. OTDRC. MultimeterD. Power meterarrow_forwardplease help me all option is step by step solve thank youarrow_forward1.A. When a grounding electrode conductor is connected to the grounded conductor within a serviceequipment enclosure, it's required to be connected to the _______ terminal bus.A. service bonding jumperB. equipment groundingC. grounded conductorD. main bonding jumper1.B. The grounding electrode conductor for a DC system will have that conductor sized no smaller than_______ AWG aluminum.A. 8B. 6C. 10D. 121.C. What are the two key aspects of the installation of the grounding electrode conductor?A. Sizing and protectionB. Bonding and accessibilityC. Materials and placementD. Location and safetyarrow_forward
- In an over head transmission line the conductor weight with ice loading is 1.85 kg. The total weight of the conductor is 2.95 kg. Calculate Weight due to wind per unit length. (All weights given are for unit length)arrow_forwardA three-phase double circuit line is composed of ACSR Drake conductors arranged as shown. Calculate: (a) the line-to-neutral capacitance per mile, (b) the line-to-neutral capacitive reactance per mile, (c) the per phase inductance per mile, and (d) the per phase inductive reactance per mile. - 18' 10' 21' 10' 18'arrow_forwardPlease provide Handwritten answerarrow_forward
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