Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Question
Chapter 18, Problem 28R
To determine
Choose the correct option from the given options for the given statement.
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Ground fault protection of
-
equipment shall be provided for
solidly grounded wye electrical
services of more than 150 volts
to ground, but not exceeding
1000V phase - to - phase for each
service disconnecting means
rated
A. 1000
B. 1500
C. 2000
D. 2500
amperes or more.
15. What does a grounding symbol on a construction drawing convey?A. A single ground rodB. A grounding electrode systemC. A ground-fault current pathD. An equipment grounding conductor
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.
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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- - 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. Durabilityarrow_forwardadvanced grounding applications 16. Duct banks for medium- and high-voltage feeders are identified with _______ on top before final grading processes. A. a red dieB. a green stripe C. an orange wire D. the initials "DB"arrow_forward19. What size copper bonding jumper must be used in an AC electrical system that has 500 kcmil copper phase conductors? A. 4/0 B. 1/0 C. 2/0 D. 3/0 20. A neutral disconnect link is usually in the form of a _______ in larger service equipment. A. screwB. wireC. clamp D. busbararrow_forward
- 3.a. When feeders or branch circuits are installed to supply a separate building or structure, a/an _______must also be installed.A. snap switchB. junction boxC. equipment grounding conductorD. supply conductor3.b. How many system bonding jumpers normally are there for a separately derived system that's grounded?A. TwoB. OneC. ZeroD. Threearrow_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_forwardThe term "____" is defined in NEC® Article 100 as "connected to establish electrical continuity and conductivity." Select one: A. BENDED (BENDING) B. BONDED (BONDING) C. SHUNTED (SHUNTING) D. GROUNDED (GROUNDING)arrow_forward
- 1.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_forwardWhen installing a surge arrester at the service of less than 1000 volts, the grounding conductor shall be connected to ______. the grounded service conductor the grounding electrode conductor III. the grounding electrode for the service the equipment grounding terminal in the service equipment (a.) I & II only (c.) III & IV only (b.) I & III only (d.) I, II, III or IVarrow_forward[Fill-in-the-blank] in dwelling units shall supply only loads within that dwelling unit or no loads associated only with that dwelling unit. Select one: a. None of these b. Ground-fault protection c. Service-entrance conductors d. Branch circuitsarrow_forward
- #14,#17arrow_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_forwardQUESTION 1 The required terminal wiring space for 4/0 AWG THHN copper conductors entering a 480-volt transformer housing and bent 90 degrees to enter the terminal is _____. a 3 inches b 4 inches c 5 inches d 6 inchesarrow_forward
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