Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Chapter 2.1, Problem 20R
a.
To determine
Find the maximum possible number of 12 AWG conductors permitted in the
b.
To determine
Find the maximum possible number of 12 AWG conductors permitted in the
c.
To determine
Find the maximum possible number of 12 AWG conductors permitted in the
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Assuming all terminals are rated 75°C and you have Seven #10 AWG THHN/THWN conductors in a conduit and the conduit is run inside an office building, the largest size circuit breaker or fuse permitted to protect these wires is?
Assuming all terminals are rated 75 degrees Celsius, and you have six (6) #10 AWG THHN/THWN conductors in a conduit and the conduit is run inside an office building, What is the largest size circuit breaker or fuse permitted to protect this wire?
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…
Chapter 2 Solutions
Electrical Wiring Residential
Ch. 2.1 - What does a plan show about electrical outlets?...Ch. 2.1 - Prob. 2RCh. 2.1 - Prob. 3RCh. 2.1 - Prob. 4RCh. 2.1 - Prob. 5RCh. 2.1 - Prob. 6RCh. 2.1 - Prob. 7RCh. 2.1 - Prob. 8RCh. 2.1 - What methods may be used to mount luminaries to an...Ch. 2.1 - What advantage does a 4 in. octagon box have over...
Ch. 2.1 - What is the size of the opening of a switch...Ch. 2.1 - Prob. 12RCh. 2.1 - Prob. 13RCh. 2.1 - Prob. 14RCh. 2.1 - Prob. 15RCh. 2.1 - Prob. 16RCh. 2.1 - Prob. 17RCh. 2.1 - Prob. 18RCh. 2.1 - Prob. 19RCh. 2.1 - Prob. 20RCh. 2.1 - Prob. 21RCh. 2.1 - Prob. 22RCh. 2.1 - Prob. 24RCh. 2.1 - Prob. 26RCh. 2.1 - Prob. 27RCh. 2.1 - Prob. 28RCh. 2.1 - Prob. 29RCh. 2.1 - Prob. 31RCh. 2.1 - Does the NEC allow metal raceways to be used with...Ch. 2.2 - Prob. 1RCh. 2.2 - What is the size of the footing for the steel...Ch. 2.2 - Prob. 3RCh. 2.2 - Prob. 4RCh. 2.2 - Prob. 5RCh. 2.2 - Prob. 6RCh. 2.2 - How far is the front garage wall from the curb?...Ch. 2.2 - How far is the side garage wall from the property...Ch. 2.2 - Prob. 9RCh. 2.2 - What is the purpose of the I-beams that rest on...Ch. 2.2 - Where is access to the attic provided?...Ch. 2.2 - Prob. 13RCh. 2.2 - Prob. 14RCh. 2.2 - Prob. 15RCh. 2.2 - Prob. 16RCh. 2.2 - What is the stud size for the partitions between...Ch. 2.2 - Who is to furnish the range hood?...Ch. 2.2 - Who is to install the range hood?...
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- The recessed fluorescent luminaires installed in the ceiling of the recreation room of this residence are connected with trade size flexible metal conduit. These flexible connections are commonly referred to as fixture whips. Does the flexible metal conduit provide adequate grounding for the luminaires, or must a separate equipment grounding conductor be installed? ________________arrow_forwarda. The Code requires a minimum of two small-appliance circuits in a kitchen. Is it permitted to connect a receptacle in a dining room to one of the kitchen small-appliance circuits? _______________ What Code section applies to this situation? _______________ b. Are outdoor weatherproof receptacles permitted to be connected to a 20-ampere small-appliance circuit? _______________ c. Receptacles located above the countertops in the kitchen must be supplied by at least _______________ 20-ampere small-appliance circuits.arrow_forwardRefer to the specifications in the back of this text following Chapter 33. a. What electrical codes must be conformed to? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ b. What is the wiring method to be used in the workshop? ________________________________________________________________________ c. What size conductors are to be used for the lighting branch circuits? ______________________ AWG the small-appliance branch circuits? ______________________ AWG d. What section of the specifications tells us the size of the service entrance to be installed for this residence?arrow_forward
- QUESTION 25 Type TC cable shall not be _____. a. installed where it will be exposed to physical damage b. all of these c. installed outside of a race-way or cable tray system, unless permitted in 336.10(4), 336.10(7), 336.10(9), and 336.10(10) d. used where exposed to direct rays of the sun, unless identified as sunlight resistantarrow_forwardFlexible metal conduit (FMC) shall be securely fastened in place by an approved means within ____ of each box, cabinet, conduit body, or other conduit termination and shall be supported and secured at intervals not to exceed ____. Select one: a. 6 in., 2 ft, b. 6 in., 3 ft, c. 8 in., 4 1/2 ft, d. 12 in., 4 1/2 ft,arrow_forwardWhat section of the Code prohibits supporting telephone wires from raceways that contain light or power conductors? NEC _____arrow_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_forwardConstruction sites can be dangerous because of the manner in which extension cords, portable electrical tools, and other electrical equipment are used and abused. To reduce this hazard, 590.6(A) of the NEC requires that all 125-volt, single-phase, 15-, 20-, and 30-ampere receptacle outlets used for temporary wiring during construction must be _________________ protected.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_forward
- A ______ is a raceway containing the service entrance conductors that is run through the roof of a building to a height sufficient to obtain the necessary clearances for the service-drop conductors. a. service lateralb. mast-type service entrancec. service pointarrow_forwardThe following is a layout of the lighting circuit for the Laundry, Powder Room, Rear Entry Hall, and Attic. Complete the wiring diagram using colored pens or pencils to indicate conductor insulation color. The GFCI receptacle in the Powder Room is not shown in the diagram because it is connected to a separate circuit, B21.arrow_forwardWhich 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.arrow_forward
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