Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Question
Chapter 27, Problem 17R
a.
To determine
Find the size of conductors that supplies Panelboard B.
b.
To determine
Find the size of raceway.
c.
To determine
Find whether the raceway is in the form of electrical metallic tubing or rigid conduit.
d.
To determine
Find the size of overcurrent device that protects the feeder conductors to Panelboard B.
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what section of the code prohibits supporting telephone wires from raceways that contain light or power conductors.
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…
In 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.
Chapter 27 Solutions
Electrical Wiring Residential
Ch. 27 - Define the Service Point. ______________Ch. 27 - Define service-drop conductors.Ch. 27 - Prob. 3RCh. 27 - a. The service head must be located (above)...Ch. 27 - Prob. 5RCh. 27 - When a conduit is extended through a roof, must it...Ch. 27 - a. What size and type of conductors are installed...Ch. 27 - How and where is the grounding electrode conductor...Ch. 27 - What are the minimum distances or clearances for...Ch. 27 - What are the minimum size ungrounded conductors...
Ch. 27 - What is the minimum size copper grounding...Ch. 27 - What is the recommended height of a meter socket...Ch. 27 - Prob. 13RCh. 27 - Prob. 14RCh. 27 - Prob. 15RCh. 27 - Prob. 16RCh. 27 - Prob. 17RCh. 27 - Prob. 18RCh. 27 - Prob. 19RCh. 27 - Prob. 20RCh. 27 - Prob. 21RCh. 27 - Prob. 22RCh. 27 - Prob. 23RCh. 27 - Prob. 24RCh. 27 - Prob. 25RCh. 27 - Prob. 26RCh. 27 - Prob. 27RCh. 27 - Prob. 28RCh. 27 - Prob. 29RCh. 27 - Prob. 30RCh. 27 - Prob. 31RCh. 27 - Prob. 32RCh. 27 - Prob. 33RCh. 27 - Prob. 34RCh. 27 - Prob. 35RCh. 27 - Prob. 36RCh. 27 - Prob. 37RCh. 27 - Prob. 38RCh. 27 - Prob. 39RCh. 27 - Prob. 40RCh. 27 - Prob. 42RCh. 27 - Prob. 43RCh. 27 - Prob. 44RCh. 27 - Prob. 45RCh. 27 - Prob. 46RCh. 27 - Prob. 47RCh. 27 - Prob. 48R
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- What section of the Code prohibits supporting fire alarm conductors from raceways that contain light or power conductors? NEC ______.arrow_forwardIs 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_forwardHow and where is the grounding electrode conductor attached to the water pipe?arrow_forward
- List the methods by which an equipment grounding conductor is connected to a device box.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_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_forward
- In the conduit diagram shown in attached picture, determine how many wires are in each conduit between each piece of equipment. Identify each wire terminal connection and the quantity of wires, as shown in the example, above the disconnectarrow_forwardWhat is the largest size solid conductor that is generally permitted to be installed in a raceway?arrow_forward16. The _______ point is where the facilities of the serving utility and the premises wiring connect.A. groundedB. neutralC. serviceD. bondingarrow_forward
- a. What size and type of conductors are installed for the service in this text? _____________ b. What size conduit is installed? _____________ c. What size grounding electrode conductor is installed? (not neutral) _____________ d. Is the grounding electrode conductor insulated, armored, or bare? _____________arrow_forwardThe 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 ______ 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_forward
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