ELECTRICAL WIRING:RESIDENT.-TEXT (PB)
19th Edition
ISBN: 9781337116213
Author: MULLIN
Publisher: CENGAGE L
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Chapter 4, Problem 42R
What size overcurrent device protects the air-conditioning unit?
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A three-phase transmission line supplies power to three loads at a voltage
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S₁ = 100+ j50 VA
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Load 3:
S3 = 10 + j0 VA
Find the magnitude of the line current | Line and the combined power factor of
the loads.
Hint:
Steral \= √3 | Vime |× | Ime |
line
line
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Chapter 4 Solutions
ELECTRICAL WIRING:RESIDENT.-TEXT (PB)
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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