Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 18, Problem 11R
Adjustment factors for conductor ampacities must always be taken into consideration when (a) _____________ are contained in one raceway.
Correction factors are applied when (b) ___________________
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- Loads, Service, and Overcurrent Protection
6.a. The general lighting load is based on a _______ per square foot basis.A. kilowattB. number of circuitsC. volt-ampereD. general illumination6.b. What's the primary disadvantage of using copper conductors?A. AvailabilityB. WeightC. CostD. Durability
When installing raceways underground in rigid nonmetallic conduit and other approved raceways, there must be a minimum of ___ of cover.
a. 6in b. 12in. c. 18in. d. 22in.
Raceways shall not be used as a means of support for Class 2 conductors except under the provisions of _____.
A. NEC 300.16(A)B. NEC 300.13(A)C. NEC 300.11(C)(2)D. NEC 300.15(B)
Chapter 18 Solutions
Electrical Wiring Residential
Ch. 18 - a. What circuit supplies the workshop lighting?...Ch. 18 - Prob. 2RCh. 18 - a. How is EMT fastened to masonry? _______________...Ch. 18 - What type of luminaires are installed on the...Ch. 18 - Prob. 5RCh. 18 - To what circuit are the smoke detectors connected?...Ch. 18 - Is it a Code requirement to connect smoke...Ch. 18 - Prob. 8RCh. 18 - Prob. 9RCh. 18 - Prob. 10R
Ch. 18 - Adjustment factors for conductor ampacities must...Ch. 18 - Prob. 12RCh. 18 - Prob. 13RCh. 18 - Calculate the total current draw of Circuit A17 if...Ch. 18 - Prob. 15RCh. 18 - A conduit body may contain splices if marked with...Ch. 18 - What size box would you use where Circuit A17...Ch. 18 - List the proper trade size of electrical metallic...Ch. 18 - According to the Code, what trade size EMT is...Ch. 18 - a. When more than three current-carrying...Ch. 18 - Prob. 21RCh. 18 - For laundry equipment in basements, what sort of...Ch. 18 - Prob. 23RCh. 18 - A Type NM cable carries a branch circuit to the...Ch. 18 - Prob. 25RCh. 18 - The following is a layout of the lighting circuits...Ch. 18 - Prob. 27RCh. 18 - Prob. 28R
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- When connecting a multiwire (3-wire) circuit to a single phase panel, one ungrounded conductor must be connected to the ____ phase and the other ungrounded conductor must be connected to the ____ phase. Select one: a. A, A b. B, B c. A, B d. doesn’t matterarrow_forwardService-lateral conductors are required to be insulated except for the grounded neutral conductor when it is___. A. Bare copper used in a raceway B. Bare copper & part of a cable assembly that is identified for ground use C. copper-clad Aluminum D. A or Barrow_forwardMotor-circuit conductor ampacity values are in accordance with __________. A. Table 310.15(B)(16)B. Table 310.19C. NEC 430.6(A)D. Chapter 9, Table 8arrow_forward
- Equipment Grounding 10. Which of the following statements about ground faults is true?A. They usually occur between any grounded circuit conductor and the equipment grounding conductor. B. They're often normal and typically intentional.C. They can't result from human error.D. They can happen if a conductive tool is dropped in an energized equipment's electrical enclosure.arrow_forward4.) Conductors that supply a single motor used in a continous duty application sall have an ampacity of __________________ of the motor's full load current rating. a.) Not less than 300%b.) Not less than 125%C.) Not less than 250%d.) None of the above 5.) The _________ on the nameplate of motor is an indication of the overload capacity of the motor a.) Code letterb.) Design Letterc) Insulation classd.) None of the above 6.) The __________ describes motor's ability to withstand temperature overtime a.) Code letterb.) Design letterc.) insulation classd.) None of the abovearrow_forward2. Conductors in concealed raceways, even though they may become accessible by withdrawing them, are still considered ____. Select one: A. DISTRIBUTED B. GROUNDED C. CONCEALED D. INACCESSIBLEarrow_forward
- equipment grounding 1. The only exception to the need for all information technology equipment to be satisfactorily grounded is where the equipment is A. DC powered.B. backup generator powered. C. double-insulated.D. isolated equipment. 2. Which section of the National Electrical Code lists sizing requirements for wire-type equipment grounding conductors? A. 250.66 B. 250.118 C. 250.4 D. 250.122arrow_forward10. Main bonding jumpers are required to be made of _______ or other corrosion-resistant material.A. copperB. aluminumC. copper-clad aluminumarrow_forward12. Which of the following statements about ground faults is true?A. They can happen if a conductive tool is dropped in an energized equipment's electrical enclosure.B. They usually occur between any grounded circuit conductor and the equipment grounding conductor.C. They can't result from human error.D. They're often normal and typically intentional.arrow_forward
- Expansion fittings and telescoping sections of metal raceways shall be made electrically continuous by _____ or other means. Select one: A. GROUNDING ELECTRODE B. GROUNDED CURRENT CARRYING CONDUCTOR C. EQUIPMENT BONDING JUMPERarrow_forward11. Specific rules apply for the installation of _______, but no identification requirements for them exists.A. grounding electrode conductorsB. grounding electrodes.C. main bonding jumpers.D. equipment grounding conductors.arrow_forwardThree separate neutral conductors are installed to reduce the possibility of a conductor overheating from ____ currents.arrow_forward
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