Electrical Wiring Residential
19th Edition
ISBN: 9781337101837
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 26, Problem 17R
Circle the correct answer from the following statements:
- a. Conductors for fire alarm systems are not permitted to be installed in the same raceways, cables, or electrical boxes as the light and power conductors.
- b. It is permissible to install fire alarm conductors in the same raceways, cables, or electrical boxes as the light and power conductors because the conductors for fire alarm systems covered in Article 760 are small and would easily fit into other electrical raceways and boxes.
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Which of the following statements about equipment grounding conductors (EGCs) is true?A. The National Electrical Code permits the EGC to also perform as a grounding electrode conductor.B. More than one EGC must be used if multiple circuits are installed in a single raceway, cable, or cable tray.C. No current should be present in the EGC during normal operation.D. EGCs are required to be decreased in size to address voltage drop.
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10.a. Which of the following is a condition of the exception that allows the grounded conductor of feeders tobe used for grounding at separate buildings or structures?A. There are common electrically continuous metallic paths between the feeder source and the destination at the structure served.B. There are common electrically continuous nonmetallic paths between the equipment grounding conductor and the destinationat the structure served.C. An equipment grounding conductor isn't included with the supply circuit to the separate structure.D. Ground-fault protection of equipment is provided on the supply side of the feeder.10.b. A service disconnection means must be installed adjacent to, within sight of, and no more than_______ feet from a mobile home.A. 20B. 30C. 10D. 50
Chapter 26 Solutions
Electrical Wiring Residential
Ch. 26 - In your own words, explain the terms alarm and...Ch. 26 - The requirements for household fire alarm systems...Ch. 26 - Do heat alarms and carbon monoxide alarms take the...Ch. 26 - Name two basic ways that smoke alarms are powered.Ch. 26 - Name the two types of smoke alarms.Ch. 26 - List the absolute minimum level of smoke alarm...Ch. 26 - Circle the correct answer from the following...Ch. 26 - Circle the correct answer from the following...Ch. 26 - Circle the correct answer from the following...Ch. 26 - Prob. 10R
Ch. 26 - Prob. 11RCh. 26 - An important but often overlooked requirement in...Ch. 26 - Carbon monoxide is ____________, and is...Ch. 26 - Circle the correct answer from the following...Ch. 26 - The wiring of more complex household fire alarm...Ch. 26 - Circle the correct answer from the following...Ch. 26 - Circle the correct answer from the following...Ch. 26 - Fire alarm cable generally used in more complex...Ch. 26 - When installing a fire alarm system or a complete...Ch. 26 - Residential sprinkler fire protection systems are...
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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
- Using the above example, determine the wire size needed for the 400-ampere service in accordance with the National electrical Code. Assume that the conductors have type THWH insulation. (Note: As a general rule, for each 100 feet of conductor length the wire size is increased one standard size because of voltage drop.)arrow_forwardIdentify the type of cable that is permitted in single- and multifamily dwelling units but that cannot be used underground, nor in buildings that are more than three stories above grade, nor in commercial garages, motion picture studios, theaters, places of assembly, elevator hoist ways, and other corrosive or hazardous locations, and what electrical code is universally used in the United States?arrow_forward1. Which of the following statements about equipment grounding conductors is true?A. Unacceptable equipment grounding conductors include conduit, tubing, and cable armor.B. They must be capable of withstanding the higher level of ground-fault current to perform their safety function.C. They increase voltages above ground potential on conductors and equipment enclosures during normal operation.D. When they're far from their associated circuit conductors, impedance values are kept as low as possible during ground-faultconditions.arrow_forward
- Where insulated conductors are deflected within a wireway, either at the ends or where conduits, fittings, or other raceways or cables enter or leave the wireway, or where the direction of the wireway is deflected greater than ____, dimensions corresponding to one wire per terminal in Table 312.6(A) shall apply.arrow_forward4.a. The installation of motor controllers and combination load equipment is not permitted if the short-circuitcurrent rating of the equipment isA. equal to the available short-circuit current at the site of installation.B. not found on either of the nameplates.C. more than the available short-circuit current at the site of installation.D. less than the available short-circuit current at the site of installation. 4.b. In a(n) ___ bend, the conductor does not enter or leave an enclosure through the wall opposite itsterminals.a. Vb. Sc. Larrow_forward5. If a separate, wire-type equipment grounding conductor (EGC) is used for any reason, the EGC of a grounding-type receptacle must be connected to which of the following?A. The grounding terminal bar outside the service equipment enclosure in a grounded systemB. An EGC that's part of another branch circuit that originates from where the branch circuit for the receptacle originatesC. Any accessible point on the grounding electrode conductorD. The service conductor outside the service equipment enclosure in an ungrounded systemarrow_forward
- 16. Flexible metal conduit will be installed between a raceway and a transformer in a system. If it's to serve as an equipment grounding conductor, the flexible conduit and its fittings must be less than _______ feet. A. 2 B. 6 C. 10 D. 4 17. In which of the following situations can an equipment ground conductor be run separately from the circuit conductors? A. When you install a GFCI and are connecting additional receptaclesB. When the connection is to be made to a nearby water pipeC. When you're replacing an ungrounded two-wire receptacle with a grounded receptacle D. When there are no spare conductors in the cable 18. A 400-amp circuit breaker protects a feeder that's installed in a nonmetallic raceway that requires an equipment grounding conductor. Which of the following is the minimum size of aluminum equipment grounding conductor that should be used in this situation? A. No. 4B. No. 1C. No. 6 D. No. 2 19. Which of the following is bonded to the grounding electrode system…arrow_forwardA ____shall be used to connect the equipment grounding conductors, the service equipment enclosures, and where the system is grounded, the grounded service conductor to the grounding electrode. (a.) bus bar ( b.) 5/8” ground rod (c.) neutral conductor (d.) grounding electrode cond. For equipment rated 1200 amperes or more 600 volts or less, and over 6 feet wide, containing overcurrent devices, switching devices, or control devices, there shall be one entrance not less than ____inches wide and 6 ½ feet high at each end. (a.) 24 (b.) 36 (c.) 30 (d.) 48 When calculating the conductor fill for strut-type channel raceway with internal joiners, the raceway shall be permitted to be filled to _____% of the cross-sectional area. (a.) 20 ( c.) 30 (b.) 25 (d.) 40arrow_forwardWhat section of the Code prohibits supporting telephone wires from raceways that contain light or power conductors? NEC _____arrow_forward
- 12. 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_forward3. Identify and explain the safety procedures and precautions that should be followed for fire prevention and safety during the installation of the cables? Note: Please do not handwritten.arrow_forwardExpansion 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_forward
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