Electrical Wiring Residential
19th Edition
ISBN: 9781337101837
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 18, Problem 3R
- a. 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.
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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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- Flexible 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_forward16. The _______ point is where the facilities of the serving utility and the premises wiring connect.A. groundedB. neutralC. serviceD. bondingarrow_forwardWhat is the minimum branch circuit wire size that may be installed in a dwelling?arrow_forward
- How many circuit wires enter the entry ceiling box? How many equipment grounding conductors enter the entry ceiling box?arrow_forwardWhat section of the Code prohibits supporting fire alarm conductors from raceways that contain light or power conductors? NEC ______.arrow_forwardIn the conduit layout shown in picture attached, determine how many wires are contained in each conduit between each piece of equipment. Identify each wire with a proper terminal marking, as shown in the example, above the disconnect switch.arrow_forward
- For residential wiring, not less than one 15-ampere lighting branch circuit should be provided for every ____________ ft2 of floor area. If 20-ampere lighting branch circuits are used, provide one 20-ampere lighting branch circuit for every ____________ ft2 of floor areaarrow_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_forwardWhat are Diagram,Construction, Operation, Advantages and Disadvantages of Air Circuit Breaker Please include the reference link for all parts.arrow_forward
- 19. 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_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_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
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