EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN: 9781337516549
Author: Simmons
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Textbook Question
Chapter 17, Problem 3R
Why is it important that the “hot” conductor in a 3-wire branch circuit be properly connected to opposite phases in a panelboard? __________________
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6. Which of the following is a condition that a liquidtight flexible metal conduit must meet in order to be suitable as an equipment grounding conductor?
A. The conduit is terminated in listed fittings.B. For trade sizes 3/4 through 1 1/4, the conduit conductors contained in the conduit are protected by overcurrent devices rated
at 20 amperes or less.C. The combined length of the conduit and other tubing and conduit in the same ground-fault path exceeds six feet.
D. For trade sides 3/8 through 1/2, the circuit conductors contained in the conduit are protected by overcurrent devices rated not more than 60 amperes.
7. You're going to connect a surge protection device to a separately derived electrical system. In this situation, the surge protection device should be connected at
A. the load side of the first overcurrent protection device. B. the input to the transformer's primary winding.C. the end of the shortest branch circuit.D. the first connected IT cabinet.
8. What is another term…
The frames of ranges, wall-mounted ovens, counter-mounted cooking units, and clothes dryers under the conditions permitted for existing installations, ___ permitted to be connected to the grounded circuit conductor.
Select one:
a. shall not be
b. can not
c. may be
d. shall be
The point of attatchment of the service drop conductors to a building must not be less than ______ ft above finish grade
Chapter 17 Solutions
EBK ELECTRICAL WIRING RESIDENTIAL
Ch. 17 - What is the total current draw when all six...Ch. 17 - The junction box that will be installed above the...Ch. 17 - Why is it important that the hot conductor in a...Ch. 17 - In the diagram, Load A is rated at 10 amperes, 120...Ch. 17 - Calculate the watts loss and voltage drop in each...Ch. 17 - Unless specifically designed, all recessed...Ch. 17 - Where in the NEC would you look for the...Ch. 17 - What is the current draw of the recessed...Ch. 17 - Prob. 9RCh. 17 - Calculate the total current draw for Circuit B9,...
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- Complete the wiring diagram for the Recreation Room. Follow the suggested cable layout. Use colored pencils or pens to identify the various colors of the conductor insulation.arrow_forwardIf you use 600-volt rated conductors for Class 2 wiring, does the Code permit pulling these conductors through the same raceway as the power conductors? (Yes) (No) (Circle the correct answer.) Give the NEC section number. ____________arrow_forwardIs it always necessary to attach the bare equipment grounding conductor of a nonmetallic-sheathed cable to the green hexagon-shaped grounding screw on a receptacle? Explain.arrow_forward
- How many circuit wires enter the entry ceiling box? How many equipment grounding conductors enter the entry ceiling box?arrow_forwardOn what basis is the neutral conductor of a service entrance determined? _____arrow_forwarda. Does the circuit for the Master Bedroom have a grounded circuit conductor? ____________________ b. Does it have an equipment grounding conductor? ____________________ c. Explain the difference between a grounded conductor and an equipment grounding conductor. ____________________ ____________________arrow_forward
- How many circuit conductors enter the box a. where the range hood will be installed? _________________ b. in the ceiling box over which the track will be installed? _________________ c. at the switch location to the right of the sliding door? _________________arrow_forwardWhat section of the Code prohibits supporting fire alarm conductors from raceways that contain light or power conductors? NEC ______.arrow_forwardWhen a three-conductor multi-wire circuit is used in place of two separate branch circuits to supply split-wired receptacles, the grounded (neutral) conductor is required to be ____. A. durably markedB. pigtailed so that its continuity does not depend on the presence of a wiring deviceC. connected to the white or silver-colored receptacle binding screwD. both b and carrow_forward
- 5. 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_forward10.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. 50arrow_forward19. Which of the following is an approved disconnecting means for a feeder or branch circuit supplying a separate building or structure? A. Bonding locknutB. PanelboardC. Circuit breakerD. Overcurrent devicearrow_forward
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