Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 1, Problem 1R
What is the purpose of specifications?
Expert Solution & Answer
To determine
Explain the purpose of specifications.
Explanation of Solution
Discussion:
In an architect plan, a standard practice to include a set of detailed specification with each set of plans to prevent confusing details in working drawings.
In the electrical specifications, the size, type, and rating of all electrical parts will be listed, which will be useful for an electrical contractor to estimate the cost of a residential wiring.
Conclusion:
Thus, the purpose of specifications is explained.
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5) The normalized radiation intensity of an antenna is represented by:
U(6)=cos²(0) cos2 (30), w/s Half-power beamwidth HPBW is......
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2- Displacement current is taken to be negligible (compared to the conduction current) if
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3- The transmission line act as inductor when it terminated by:
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4- The scattering aperture equals to the effective aperture when the antenna is:
a) Complex conjugate matching b) short circuit c) open circuit d) none of the above
5- The isotropic point source has directivity of:
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I selected a DC-DC converter capable of delivering 120 VDC from a 600 VDC input. When I reached out to the manufacturer, they asked for the total power consumption the converter would need to handle.To estimate this, I calculated the power requirements for the components that will use the 120 VDC supply: interior lighting, end lights, and buzzers. The breakdown is as follows:- Light Bulbs: 16 bulbs at 10 W each = 160 W- Buzzers: 2 buzzers at 5 W each = 10 W- End Lights: 2 lights at 15 W each = 30 W
This results in a total estimated power demand of 200 W.My concern is whether I should request a higher wattage rating for the converter to provide sufficient tolerance and ensure the system operates efficiently without risking an overload.
Note: The DC power system is designed specifically for a trolley
Chapter 1 Solutions
Electrical Wiring Residential
Ch. 1 - What is the purpose of specifications?Ch. 1 - Refer to the specifications in the back of this...Ch. 1 - What is done to prevent a plan from becoming...Ch. 1 - Name three requirements contained in the...Ch. 1 - Prob. 5RCh. 1 - What phrase is used when a substitution is...Ch. 1 - What is the purpose of an electrical symbol?...Ch. 1 - Prob. 8RCh. 1 - Prob. 9RCh. 1 - What three parties must be satisfied with the...
Ch. 1 - Prob. 12RCh. 1 - Prob. 13RCh. 1 - Does the NEC provide minimum or maximum standards?...Ch. 1 - What do the letters UL signify?Ch. 1 - What section of the NEC states that all listed or...Ch. 1 - Prob. 17RCh. 1 - Prob. 18RCh. 1 - Does compliance with the NEC always result in an...Ch. 1 - Name two nationally recognized testing...Ch. 1 - Prob. 21RCh. 1 - Prob. 23RCh. 1 - A junction box on a piece of European equipment is...Ch. 1 - Prob. 25RCh. 1 - You will learn in Chapter 3 that residential...Ch. 1 - Prob. 27RCh. 1 - What can you do to reduce or eliminate the...Ch. 1 - What is the NEC definition of a qualified person?Ch. 1 - Are low-voltage systems totally safe? Explain.Ch. 1 - Prob. 32RCh. 1 - What do the letters PPE stand for?...Ch. 1 - Prob. 34RCh. 1 - Where might you obtain information about...Ch. 1 - Prob. 36R
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