Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 25.3, Problem 15R
Why is it recommended that the low-voltage secondary of the transformer be run to the front hall chime location and separate 2-wire cables be installed to each push button? ____
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Students have asked these similar questions
➤ 1. What is the role of the current transformer and voltage transformer?
➤ 2. Draw a CT and PT connections to a bus with a feeder and a feeder
circuit breaker using the standard symbol diagram.
➤ 3. Why the secondary side of the CT is never allowed to open the circuit
during operation?
QUESTION 3
Pair up the correct descriptions with the codes written in Sketch for Arduino
: void setup ()
A. Run setup and set pin 13 to be an output
B. Run loop repetitively
C. Set pin 13 to high (LED on)
D. Delay for half a second, and then Set pin 13 to low (LED off)
pinMode (13, OUTPUT):
E, Delay for a full second
: Void loop 0
F. Complete one iteration of the loop, and run it again
G. Delay for 500 seconds, and then Set pin 13 to low (LED of)
H. Run loop once
: digitalWrite (13, HIGH):
edelay (500):
digitalWrite (13, LOW):
delay (1000);
If the transformer section of the unit substation is to be given a megohmmeter test, the line connection to the_must be disconnected during the test to prevent a false ground reading
A. Pothead b. Lighting arrester c. High- voltage fuse d. High - voltage winding.
Chapter 25 Solutions
Electrical Wiring Residential
Ch. 25.1 - How many television outlets are installed in this...Ch. 25.1 - Which type of television cable is commonly used...Ch. 25.1 - What determines the design of the faceplates used?...Ch. 25.1 - Prob. 4RCh. 25.1 - From a cost standpoint, which system is more...Ch. 25.1 - Prob. 6RCh. 25.1 - Prob. 7RCh. 25.1 - Prob. 8RCh. 25.1 - Which article of the Code references the...Ch. 25.1 - It is generally understood that grounding and...
Ch. 25.1 - Prob. 11RCh. 25.1 - Prob. 12RCh. 25.1 - Which section of the Code prohibits supporting...Ch. 25.1 - When hooking up one CATV cable and another cable...Ch. 25.1 - Prob. 15RCh. 25.1 - Prob. 16RCh. 25.2 - How many locations are provided for telephones in...Ch. 25.2 - At what height are the telephone outlets in this...Ch. 25.2 - Sketch the symbol for a telephone outlet.Ch. 25.2 - Is the telephone system regulated by the NEC?...Ch. 25.2 - a. Who is to furnish the outlet boxes required at...Ch. 25.2 - Who is to furnish the telephones? _____Ch. 25.2 - Who does the actual installation of the telephone...Ch. 25.2 - How are the telephone cables concealed in this...Ch. 25.2 - Prob. 9RCh. 25.2 - What are the colors contained in a four-conductor...Ch. 25.2 - Itemize the code rule for the installation of...Ch. 25.2 - If finger contact were made between the red...Ch. 25.2 - What section of the Code prohibits supporting...Ch. 25.2 - The term cross-talk is used to define the hearing...Ch. 25.2 - Which section of the Code prohibits telephone...Ch. 25.3 - Prob. 1RCh. 25.3 - What style of chime is used in this residence?...Ch. 25.3 - a. How many solenoids are contained in a 2-tone...Ch. 25.3 - Explain briefly how two notes are sounded by...Ch. 25.3 - a. Sketch the symbol for a push button....Ch. 25.3 - Prob. 6RCh. 25.3 - What is the maximum volt-ampere rating of...Ch. 25.3 - What two types of chime transformers for Class 2...Ch. 25.3 - Is the extension chime connected with the front...Ch. 25.3 - a. What change in equipment may be necessary when...Ch. 25.3 - What type of insulation is usually found on...Ch. 25.3 - Prob. 13RCh. 25.3 - a. How many wires are run between the front hall...Ch. 25.3 - Why is it recommended that the low-voltage...Ch. 25.3 - a. Is it permissible to install low-voltage Class...Ch. 25.3 - a. Where is the transformer in the residence...Ch. 25.3 - a. How many feet of 2-conductor bell wire cable...Ch. 25.3 - Prob. 19RCh. 25.3 - Prob. 20RCh. 25.3 - What section of the Code prohibits supporting fire...Ch. 25.3 - Prob. 22RCh. 25.3 - What does the term Wi-Fi stand for? _____Ch. 25.3 - A Wi-Fi system is (required) (optional). (Circle...
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- Activity 9: What's My Function Directions: Write on the space provided before each item the name of the parts of the electric power transmission based on the given function. GENERATOR POWER PLANT STEP-UP TRANSFORMER DISTRIBUTION STATION TRANSMISSION SUB-STATION STEP-DOWN TRANSFORMER 1. It reduces the voltage further into a more manageable 2,300 volts. 2. Brings down the voltage to about one-fifth of the incoming voltage. 3. The generating plant that produces power and voltage at 6,600v. 4. The 2,300v are finally brought down to 220v to 230v for household consumption 5. Increases the voltage to as high as 132,000 volt which necessary due to the resistance of the conducting wires.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_forwardQOD Is it allowed by code to run 120 volt circuits in the same raceway as 480 volt circuits?arrow_forward
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