Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Chapter 28, Problem 19R
To determine
Fill in the blank with appropriate word that defines when the overcurrent protective are inserted into a circuit.
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Show that the input impedance of a lossy transmission line of length L connected to a load
impedance of Z is given by
Z₁Cosh(yL) + ZoSinh(yL)
Zin = Zo ZoCosh(YL) + Z₁Sihh(YL)
ex
Where Cosh(x) =
and Sinh(x) =
are the hyperbolic cosine and sine, respectively.
2
2
A sinusoidal source of V = 10 and Z = 50 - j40 is connected to a 60 lossless
transmission line of length 100 m with ẞ = 0.25. What is the Thevenin's equivalent of this
system seen looking into the load end of the transmission line?
2. On a distortionless transmission line, the voltage wave is given by
v(L,t) = 110e0.005L Cos(10³t + 2L) +55e-0.005L Cos(108t-2L)
where L is the length of the transmission line as measured from the load. If Z = 30002, find
a,ẞ, vp, and Zo.
Chapter 28 Solutions
Electrical Wiring Residential
Ch. 28 - What is the minimum size service for a one-family...Ch. 28 - Prob. 2RCh. 28 - Prob. 3RCh. 28 - Prob. 4RCh. 28 - Prob. 5RCh. 28 - Prob. 6RCh. 28 - Prob. 7RCh. 28 - List the standard sizes of fuses and circuit...Ch. 28 - Prob. 9RCh. 28 - Using the method shown in this unit, what is the...
Ch. 28 - State four possible combinations of service...Ch. 28 - Which Code section states that all overcurrent...Ch. 28 - All electrical components have some sort of...Ch. 28 - Arc-fault damage is closely related to the value...Ch. 28 - The utility company has provided a letter to the...Ch. 28 - While working on the main panelboard that is...Ch. 28 - Repeat problem 16 for a main service panel that...Ch. 28 - NEC ______________________________ generally...Ch. 28 - Prob. 19RCh. 28 - Prob. 20RCh. 28 - Overcurrent devices must be accessible. (True)...
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