Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Chapter 24, Problem 2R
To determine
Name the article of the NEC that is in compliance with the disconnecting means for the central heating equipment other than the fixed electric space heating equipment.
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A left-sided signal x(t)=-e¯bt u(-t):
0
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X(s) -e-bu(t)e-st dt
=-
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-(b+o+jw)t
dt =
=
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-∞
(a + b) + jw
1
s+b
For this integral to converge, it is necessary that b +σ <0; i.e., ROC: Re[s]=σ < −b.
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How ?
A left-sided signal x(t)=-ebt u(-t):
A right-sided signal x(t)=e¯at u(t)
Find Laplace transform of x(t)=u(t)
Find Laplace transform of x(t) = −e¯btu(−t) + e¯atu(t)
Find Laplace transform of x(t) = u(t)
Chapter 24 Solutions
Electrical Wiring Residential
Ch. 24 - Prob. 1RCh. 24 - Prob. 2RCh. 24 - Prob. 3RCh. 24 - In a home, the low-voltage wiring between the...Ch. 24 - Prob. 5RCh. 24 - The nameplate on a transformer will indicate...Ch. 24 - If Class 2 conductors are insulated for 150 volts,...Ch. 24 - If you use 600-volt rated conductors for Class 2...Ch. 24 - The NEC is very strict about securing anything to...Ch. 24 - Does the Code permit attaching the low-voltage...
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