Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 23.1, Problem 1R
- a. What is the allowance in watts made for electric heat in this residence? ________
- b. What is the value in amperes of this load? _______________________________
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What follows is a numeric fill in the blank question with 3 blanks.
Figure 1 shows the three phases V-t graph in Turkey. Please write the indicated values with their units in boxes and Voltage - time function of each phase in table below. Please write the units in the second box.
1= _______________ V
2= ________________ms
3= _______________ms
Encircle the letter of the correct answer
1.One kW-Hr is equivalent to _______.
(a) 1,414.14 BTU per hour (b) 3,600,000 N.m(c) 1,414.14 Cal. per sec (d) 3,600,000 kJ
2. The voltage across any part of a circuit is equal to the _______ of the current in amperes and the resistance in Ohms.(a) difference (b) product(c) sum (d) quotient
3. In a series circuit the current is the _______ in any part of the circuit and the total emf (source) is equal to the _______ of the voltages across each resistor(a) same, sum (b) same, difference(c) same, total (d) sum, same
4. System efficiency when maximum power is transferred or delivered is ______.(a) 60%. (b) 150%.(c) 50%. (d) 200%.
5. In parallel circuit the emf across each resistor is the _____ and the total current is equal to the _____ of all branch currents(a) sum, same (b) same, product(c) same, difference (d) same, sum
6. 1,200 BTU is equivalent to _______ Joules.(a) 302,500 (b) 1,265,554(c) 302,400 (d) 3,600,000
7. Ohm’s Law states that, for…
___________ is an Area on a device characteristic where the ratio between applied voltage and resulting current is constant.
Chapter 23 Solutions
Electrical Wiring Residential
Ch. 23.1 - a. What is the allowance in watts made for...Ch. 23.1 - What are some of the advantages of electric...Ch. 23.1 - List the different types of electric heating...Ch. 23.1 - There are two basic voltage classifications for...Ch. 23.1 - What device is required when the total connected...Ch. 23.1 - Prob. 6RCh. 23.1 - Prob. 7RCh. 23.1 - A certain type of control connects electric...Ch. 23.1 - What advantages does a 240-volt heating unit have...Ch. 23.1 - The white wire of a cable may be used to connect...
Ch. 23.1 - Receptacle outlets furnished as part of a...Ch. 23.1 - The branch circuit supplying a fixed electric...Ch. 23.1 - Prob. 13RCh. 23.1 - For ballpark calculations, the wattage output of a...Ch. 23.1 - A central electric furnace heating system is...Ch. 23.1 - What section of the Code provides the correct...Ch. 23.1 - Electric heating cable embedded in plaster, or...Ch. 23.2 - Prob. 1RCh. 23.2 - Prob. 2RCh. 23.2 - Prob. 3RCh. 23.2 - a. Must an air conditioner installed in a window...Ch. 23.2 - Prob. 5RCh. 23.2 - What is the Code requirement for receptacles...Ch. 23.2 - Prob. 7RCh. 23.2 - When the nameplate on an air-conditioning unit...Ch. 23.2 - Prob. 9RCh. 23.2 - Match the following terms with the statement that...Ch. 23.2 - The disconnect for an air conditioner or heat pump...
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- answer all please i will give positive rate please allarrow_forwardYou are an electrician working in an industrial plant. The company is constructing a maintenance shop located 225 feet from the main plant electrical system. You are to install a 400-ampere three-phase wire system in the new maintenance shop. The service is supplied by the existing plant service. The voltage is 480 volts and the voltage drop is to be kept at 3% or below at full load. The conductors are to be aluminum. What size conductors should be installed for the new service? Express your answer to the nearest standard wire size. (Note: Determine the wire size by calculating length, resistance, and voltage drop as opposed to using the National Electrical Code.)arrow_forwardFill in the blank The resistance of a wire is 126.48 ohms at 1000C and 100 ohms at 300C. The temperature coefficient of this wire at 00C is ____________ per C0.arrow_forward
- the voltage applied across the resistor was reduced by 50%. the power consumed by the resistor will be reduced by _____% a. 25 b. 50 c. 75 d. 100arrow_forward6.a. Extreme _______ may cause some nonmetallic conduits to become brittle and therefore moresusceptible to damage from physical contact.A. coldB. corrosionC. voltageD. heat6.b. Snap switches are permitted to be grouped or ganged in an enclosure provided the voltage between theadjacent snap switches does not exceed ___ V.A. 400B. 300C. 200D. 100arrow_forwardWhen calculating a dwelling lighting load on the "volt-ampere per ft" basis, the receptacle load used for floor lamps, table lamps, and so forth arearrow_forward
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