Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 6, Problem 9R
If a person comes in contact with the “hot” and grounded conductors of a 2-wire branch circuit that is protected by a GFCI, will the GFCI trip OFF? Why? _________
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12. a. 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.
13. Approximately how many feet (meters) of 2-wire cable and 3-wire cable are needed to
ft
complete the circuit supplying the Master Bedroom? Two-wire cable:
ft (-
m).
m). Three-wire cable:
14. If the cable is laid in notches in the corner studs, what protection for the cable must be
provided?
15. How high are the receptacles mounted above the finished floor in this bedroom?
16. Approximately how far from the bedroom door is the first receptacle mounted? (See
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17. What is the distance from the finished floor to…
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.
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.
Chapter 6 Solutions
Electrical Wiring Residential
Ch. 6 - Explain the operation of a ground-fault circuit...Ch. 6 - Prob. 2RCh. 6 - Where must GFCI receptacles be installed in...Ch. 6 - Prob. 4RCh. 6 - Prob. 5RCh. 6 - A homeowner calls in an electrical contractor to...Ch. 6 - Prob. 7RCh. 6 - Extremely long circuit runs connected to a GFCI...Ch. 6 - If a person comes in contact with the hot and...Ch. 6 - What might happen if the line and load connections...
Ch. 6 - Is a GFCI receptacle permitted be installed as a...Ch. 6 - Prob. 12RCh. 6 - Prob. 13RCh. 6 - Prob. 14RCh. 6 - Prob. 15RCh. 6 - Construction sites can be dangerous because of the...Ch. 6 - Prob. 17RCh. 6 - Prob. 18RCh. 6 - The term SPD is becoming quite common. What do the...Ch. 6 - Transients (surges) on a line can cause spikes or...Ch. 6 - Prob. 21RCh. 6 - Prob. 22RCh. 6 - Some line transients are not damaging to...Ch. 6 - Briefly explain the operation of an immersion...Ch. 6 - What range of leakage current must trip an IDCI?Ch. 6 - Prob. 26RCh. 6 - Other than for a few exceptions, the NEC requires...Ch. 6 - In an old house, an existing nongrounding...Ch. 6 - Prob. 29RCh. 6 - NEC 210.12(A) requires AFCI protection for the...Ch. 6 - When installing GFCI and AFCI circuit breakers in...Ch. 6 - Prob. 32RCh. 6 - Prob. 33RCh. 6 - A switch that is located inside a bedroom for an...Ch. 6 - Which of the following installations for a kitchen...Ch. 6 - The receptacle outlets in the garage are required...Ch. 6 - Two 125-volt receptacles on a 20-ampere, 120-volt...Ch. 6 - Prob. 38R
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- 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_forwardEquipment 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_forwardTo testing installation of grounds, the usual procedure is to connect one lead of the megohmmeter to one of the conductors, then the other lead is___. A, connected to another conductor b, connected to the conduit or raceway c. Connected to a special grounding electrode on the megohmmeter d. Left unconnectedarrow_forward
- 11. Which of the following statements about the use of structural steel as an equipment grounding conductor (EGC) in an AC system is correct? A. Structural steel can be used as an EGC when it's bonded at both ends.B. Structural steel isn't allowed for use as an EGC.C. Structural steel must have an EGC bonding jumper every three feet of structure. D. Structural steel can be used as an EGC bonding jumper between panelboards. 12. Which of the following statements about equipment grounding conductors is true? A. They increase voltages above ground potential on conductors and equipment enclosures during normal operation. B. Unacceptable equipment grounding conductors include conduit, tubing, and cable armor. C. They must be capable of withstanding the higher level of ground-fault current to perform their safety function. D. When they're far from their associated circuit conductors, impedance values are kept as low as possible during ground-fault conditions. 13. Imagine that…arrow_forwardA(n) _________ is a reliable conductor used to ensure the required electrical conductivity between metal parts required to be electrically connected. a) Equipment bonding jumper b) Bonding conductor of jumper c) Main bonding jumper d) Equipment grounding conductorarrow_forward1. A14/2 type copper used for a general lighting branch circuit. Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 2.Three 8 AWG copper conductors with THHN insulation Installed in garage in electrical metallic tubing (EMT). The ambient temperature in the garage can reach as high as 110'F. All termination points for this circuit are rated 60'C. Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 3.Four 4 AWG copper conductor with THWN insulation imstalled in EMT in a basement. All termination points are rated at 60'C. Ampacity:______________ Maximum Fuse or Circuit Breakers Sizes:________________ 4. An 8/3 Type UF copper cable installed underground from a house to a detached garage to feed a 120/240-volt subpanel. All termination points are rated at 60'C.…arrow_forward
- b) Differentiate between Insulated-Neutral and Earthed-Neutral systems as applied to electrical distribution on board ship. c) Explain with sketches why it is necessary that a single ground fault in an insulated-earth distribution system must be located and cleared immediatelyarrow_forwardQUESTION 3 We are running 3 wires and a ground in a RMC to a control panel with a 60 amp circuit breaker disconnect in the control panel. The conduit is run along the ceiling where the ambient air temperature is 100 degrees. The control panel feeds our secondary cooling pump. What size are the ungrounded conductors? All conductors have typeTHHN insulation.arrow_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_forward
- If a grounding electrode conductor is connected at the first system disconnecting means or overcurrent device, the bonding jumper is sized the same as the ____. Select one: A. EQUIPMENT BONDING JUMPER B. POSITIVE CONDUCTOR C. SUPPLY-SIDE BONDING JUMPER D. NEUTRAL CONDUCTORarrow_forward5. How many system bonding jumpers normally are there for a separately derived system that's grounded? A. ThreeB. TwoC. One D. Zero 6. How many grounded neutral conductors are in a 208Y/120 volt, 3-phase, 4-wire system? A. ThreeB. TwoC. One D. Four 7. Which of the following are sometimes installed as an emergency system, legally required standby system, or optional standby power system for a building or structure? A. GeneratorsB. Surge protection devices C. Surge arrestersD. Transformers 8. If the system bonding jumper in a DC system is a screw, what color must the screw be? A. WhiteB. RedC. Orange D. Green 9. If overcurrent protection is provided in the transformer of a separately derived system, which of the following statements is correct? A. An equipment grounding conductor must be run with the conductors between the transformer and the building's disconnect. B. There's no need for service equipment or a panelboard in the separate building.C. A ground electrode must…arrow_forward1.1 PV modules can be wired together in an array using ______ connections to increase voltage. a. Terminating b. Series c. Parallel d. AC 1.2 A PV module, also called a solar panel, is comprised of individual photovoltaic _______ wired and mounted together as an integrated unit. a. Capsules b. Compartments c. Chips d. Cells 1.3 A __________ system uses a storage system that stores the generated electricity so it can provide during times when the system’s panels are not receiving solar energy. a. Direct coupled b. Self regulating c. Charge controlled d. Indirectly connected 1. 4 __________ energy may have the potential to supply all of the world's energy needs, but at this time, it provides a very small percentage. a. Coal b. Natural Gas c. Diesel d. Solararrow_forward
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