EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN: 9781337516549
Author: Simmons
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Textbook Question
Chapter 28, Problem 1R
What is the minimum size service for a one-family dwelling? ____________________
Expert Solution & Answer
To determine
Find the minimum rating of service size for a one-family dwelling.
Answer to Problem 1R
The minimum rating of service size for a one-family dwelling is
Explanation of Solution
Discussion:
The National Electrical Code committee develops NEC – the standard electrical code, and the main objective for the origin of the code is to protect and safeguard people and elements from electrical hazards. The codes that explain the rating of service disconnecting means are defined in an article NEC 230.79.
According to an article NEC 230.79 (C), for a one-family dwelling, the rating of the service disconnecting means should not be less than
Conclusion:
Thus, the minimum rating of service size for a one-family dwelling is
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Students have asked these similar questions
Medium 1 is a lossless dielectric (ε₁, μ₁ = μo, σ₁ = 0)
Medium 2 is a perfect electric conductor (PEC) ( 2 = 0, μ2 = μo, σ₂ = ∞)
[ Moσ = 0] [ε0 μ₁ σ₂ = ∞ ] (J=σE is finite, E = 0)
E(z) Exe² +Пe₁²]
1. For the case εr] =
λι =
=
E2(z)-0
-
1 (vacuum), E₁x 1 V/m and a frequency f = 500 MHz determine:
n₁ =
12=
2. Determine:
r =
T=
3. Using this I show that the total electric field E₁0(z) in region 1 can be written as:
E(z) = -2jE, sin(2лz/λ)✰
4. The magnitude E10(z) will show an interference pattern. The SWR (standing wave ratio) is the
Emax/Emin ratio of the magnitude of the total electric field in region 1. What is the SWR?
E (z) = 2|E|sin(2лz/2₁)|
E" (z)
SWR A
Imax
E(z)
Imin
1+r
1-||
tot
5. Roughly SKETCH the magnitude of E10(z) and E20(z) on the graph below.
E₁tot(z)
tot
E20(z)
-0.40
-0.30
-0.ło
z=0
+0.1b +0.20
would anyone be able to tell me the amount of wire needed for this electrical plan in this house? and if possible would anyone be able to tell me the amount of any other materials needed (wire sizes, box sizes/styles)
Please show all steps
Chapter 28 Solutions
EBK 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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