Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 4, Problem 25R
Liquidtight flexible metal conduit may serve as a grounding means in sizes up to and including _______ in. where used with listed fittings.
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Wiring methods permitted for service conductors include.
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a. 6in b. 12in. c. 18in. d. 22in.
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a. 6 in. b. 12in. c. 18 in. d. 24 in.
Chapter 4 Solutions
Electrical Wiring Residential
Ch. 4 - The largest size solid conductor generally...Ch. 4 - What is the minimum branch-circuit wire size that...Ch. 4 - What exceptions, if any, are there to the answer...Ch. 4 - What determines the ampacity of a wire?Ch. 4 - What unit of measurement is used for the diameter...Ch. 4 - What unit of measurement is used for the...Ch. 4 - What is the voltage rating of the conductors in...Ch. 4 - Indicate the allowable ampacity of the following...Ch. 4 - Prob. 9RCh. 4 - What are the colors of the conductors in...
Ch. 4 - For nonmetallic-sheathed cable, may the...Ch. 4 - Prob. 12RCh. 4 - Under what condition may nonmetallic-sheathed...Ch. 4 - a. What is the maximum distance permitted between...Ch. 4 - Prob. 15RCh. 4 - Prob. 16RCh. 4 - Prob. 17RCh. 4 - Prob. 18RCh. 4 - Prob. 19RCh. 4 - Circle the correct answer to the following...Ch. 4 - When running Type NM cable through a bored hole in...Ch. 4 - Where is the main service-entrance panel located...Ch. 4 - Is it permitted to use flexible metal conduit over...Ch. 4 - Liquidtight flexible metal conduit may serve as a...Ch. 4 - It is permissible for an electrician to connect...Ch. 4 - Terminals of switches and receptacles marked...Ch. 4 - Wire connectors marked AL/CU are suitable for use...Ch. 4 - A wire connector bearing no marking or reference...Ch. 4 - When Type NM cable is run through a floor, it must...Ch. 4 - When nonmetallic-sheathed cables are bunched or...Ch. 4 - In diagrams A and B, nonmetallic-sheathed cable is...Ch. 4 - The marking on the outer jacket of a...Ch. 4 - A 120-volt branch circuit supplies a resistive...Ch. 4 - In problem 35, it is desired to keep the voltage...Ch. 4 - Prob. 37RCh. 4 - The allowable ampacity of a 4 AWG THHN from Table...Ch. 4 - If, because of some obstruction in a wall space,...Ch. 4 - The recessed fluorescent luminaires installed in...Ch. 4 - Prob. 41RCh. 4 - What size overcurrent device protects the...Ch. 4 - May the 20-ampere small-appliance branch circuits...Ch. 4 - A 30-ampere branch circuit is installed for an...Ch. 4 - In many areas, metal framing members are being...Ch. 4 - Are set screwtype connectors permitted to be used...Ch. 4 - Most armored cable today has 90C conductors. What...Ch. 4 - If you saw two different types of SE cables, how...Ch. 4 - Circle the correct answer defining the type of...
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- Is it permitted to use flexible metal conduit over 6 ft (1.8 m) in length as a grounding means? (Yes) (No) (Circle the correct answer.)arrow_forwardwhat is grading of cables, explain proper in details with block diagramarrow_forwardIf 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_forward
- NEC identifies ____ types of rigid PVC conduit. Select one: A. FIVE B. TEN C. THREE D. TWOarrow_forward1.a. Which of the following is suitable as an equipment grounding conductor so long as it does so under morerestrictive conditions?A. Electrical metallic tubingB. Flexible metal conduitC. Rigid metal conduitD. Armored cable1.b. When rigid or intermediate metal conduit is installed in a hazardous location, it must be engaged by_______ threads into each connection.A. 4B. 3C. 2D. 5arrow_forward6. 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…arrow_forward
- 6. Ferrous metal raceways or enclosures are made with _______ content.A. brass or aluminumB. steel or brassC. aluminum or ironD. iron or steelarrow_forwardWhat is grading of cables.Explain?arrow_forwardService-lateral conductors are required to be insulated except for the grounded neutral conductor when it is___. A. Bare copper used in a raceway B. Bare copper & part of a cable assembly that is identified for ground use C. copper-clad Aluminum D. A or Barrow_forward
- L1. Boxes are classified by type, construction, andA. installation location.B. luminaire support capability.C. number of knockouts.D. power rating L2. Which of the following devices must be placed at each end of an armored cable to prevent damage tothe conductors?A. An insulating sliderB. An insertion couplingC. An antishort bushingD. A metal loop fitting L3. Which of the following is the maximum cross-sectional conductor fill area for underfloor raceways?A. 50%B. 60%C. 40%D. 30%arrow_forwarda. How is EMT fastened to masonry? _______________ _______________ b. The cut ends of rigid and electrical metallic tubing must be ______________ to prevent the insulation on conductors from being damaged.arrow_forward14. A grounded circuit conductor and the equipment grounding conductor should always be joined at theservice by aA. steel raceway.B. main bonding jumper.C. bus bar.D. short length of aluminum conductor.arrow_forward
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