EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN: 9781337516549
Author: Simmons
Publisher: CENGAGE LEARNING - CONSIGNMENT
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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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➤ 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
EBK 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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