Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 19.2, Problem 19R
A condominium owner complains of not getting enough hot water. The serviceman checks the voltage at the water heater and finds the voltage to be 208 volts. The serviceman checks further and finds the electrical service on the building to be a 120/208-volt, three-phase, 4-wire system. The main electrical panelboard for each condominium unit is fed with a 3-wire supply. The nameplate on the electric water heater is marked 4500 watts, 240 volts. What is the wattage output of the heating element in this water heater when connected to a 208-volt supply? _____________________
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
You just moved into a new house and notice that the bathroom light and hall light will not
turn on unless the switch for both lights is in the on position. What can you conclude
about the lights?
a.
The hall light and bathroom light are wired in parallel.
b. The light switch for the bathroom resets a breaker for both lights
C.
The hall light and bathroom light are wired in series.
d.
The hall light and bathroom light must have two separate power sources.
e. Two of the above.
2. A facility manager replaces all the TS lights in an office when they have reached 80% of their
rated life of 20,000 hours. The lights operate for 12 hours each day, 5 days per week for 52
weeks of the year. What is the group re-lamping interval for these lights?
a.
3.7 years
b.
4.6 years
c. 5.1 years
d. 6.4 years
The load current in a system is 100 A. the short-circuit current for the smallest fault is 100 A. An overcurrent capable of carrying a current of 5 A continuously is to be used. (a) Suggest a suitable C.T. ratio (b) What will be the current for the smallest fault? (c) Will the protective C.T be able to faithfully reproduce the fault current?
Chapter 19 Solutions
Electrical Wiring Residential
Ch. 19.1 - Does a jet pump have any electrical moving parts...Ch. 19.1 - Prob. 2RCh. 19.1 - Where is the jet of the pump located?...Ch. 19.1 - Prob. 4RCh. 19.1 - Prob. 5RCh. 19.1 - Prob. 6RCh. 19.1 - Prob. 7RCh. 19.1 - What is compressed in the water storage tank?...Ch. 19.1 - Explain the difference between a 2-wire...Ch. 19.1 - Prob. 10R
Ch. 19.1 - Why is a 240-volt motor preferable to a 120-volt...Ch. 19.1 - How many amperes does a 1-horsepower, 240-volt,...Ch. 19.1 - What size are the conductors used for this branch...Ch. 19.1 - Prob. 14RCh. 19.1 - What provides the running overload protection for...Ch. 19.1 - What is the maximum ampere setting permitted for...Ch. 19.1 - Prob. 17RCh. 19.1 - Because the controller contains the motor starting...Ch. 19.1 - Prob. 19RCh. 19.1 - Proper pressure of the submersible pump system is...Ch. 19.1 - Fill in the data for a 16-ampere electric motor,...Ch. 19.1 - The NEC is very specific in its requirement that...Ch. 19.1 - Does the NEC allow submersible pump cable to be...Ch. 19.1 - Must the disconnect switch for a submersible pump...Ch. 19.1 - A metal well casing (shall) (shall not) be bonded...Ch. 19.2 - Prob. 1RCh. 19.2 - A major hazard involved with water heaters is that...Ch. 19.2 - Prob. 3RCh. 19.2 - The heating elements in electric water heaters are...Ch. 19.2 - An 80-gallon electric water heater is energized...Ch. 19.2 - Prob. 6RCh. 19.2 - For residential water heaters, the Consumer...Ch. 19.2 - An 80-gallon electric water heater has 60F...Ch. 19.2 - Approximately how long would it take to produce...Ch. 19.2 - Two thermostats are generally used in an electric...Ch. 19.2 - a. How many heating elements are provided in the...Ch. 19.2 - When does the lower heating element operate?...Ch. 19.2 - Prob. 14RCh. 19.2 - Prob. 15RCh. 19.2 - Prob. 16RCh. 19.2 - a. If both elements of the water heater in this...Ch. 19.2 - a. How much power in watts would the two elements...Ch. 19.2 - A condominium owner complains of not getting...Ch. 19.2 - For a single, nonmotor-operated electrical...Ch. 19.2 - A 7000-watt resistance-type heating appliance is...Ch. 19.2 - Prob. 22R
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 10 - What is the figure below? A) Vavien switch installation B) Plug-socket installation C) Commutator switch installation D) Dimmer installation E) One-way switch installationarrow_forwardIf the per unit reactance of a power system up to the fault point is 0.2pu and base power (VAb) is 10 MVA, then the fault level (VAsc) is O 2 MVA O 100 MVA 50 MVA O 500 MVAarrow_forwardi need the answer quicklyarrow_forward
- Which of these places has the highest voltage in a properly working truck electrical system with the engine running and the batteries charging? A. Across battery terminals B. Across cranking motor B+ and cranking motor ground C. Across the alternator plus output stud and alternator ground stud cranking motor ground D. All of the above would be the exact same voltagearrow_forwardAn uncharged condenser in series with a 120V voltmeter of 10,000 ohms resistance is suddenly connected to a 100V battery. One second later, the voltmeter reads 60 volt. Determine the capacitance of the condenser. *Round off the final answer to the nearest 4 decimal places with unit. Rounding off should only be done on final answer.arrow_forwardPlease answer quickly. 17. The filament of incandescent lamp is usually made of: a. copper b. silver c. aluminum d. tungsten 18. A current measuring instrument can be modified to measure voltages by: a. using thicker wire in the coil b. using a high resistance shunt c. adding resistance in series d. adding resistance in parallel 21. "When two power sources are connected in a series-aiding configuration, the output voltage equals the _____________" a. supply with the highest voltage b. supply with the lowest voltage c. difference of the two supplies d. sum of the two suppliesarrow_forward
- h.1. In an alternating-current system, the maximum size for a copper grounding electrode conductor isA. 250 kcmil.B. 3/0.C. 500 kcmil.D. 4/0. h.2. The figure shows a fault condition in an ungrounded electrical system. Which of the following will occurbecause of the fault in this system?A. Only the overcurrent protector at Point A will trip open.B. The ground fault will heavily damage the service.C. Nothing will happen until a second ground fault occurs.D. The overcurrent protection will trip, shutting off all the line side power.arrow_forwardWe are running 3 wires and a ground in a RMC to a control panel with a 60 amp circuit breaker disconnect in the control panel. The conduit is run along the ceiling where the ambient air temperature is 100 degrees. The control panel feeds our secondary cooling pump. What size are the ungrounded conductors? All conductors have typeTHHN insulation. A #6 AWG B 600 Kcmil C #8 AWG D #2 AWG What size RMC do we need? A 3" B 3/4" C 1" D 1 1/2"arrow_forwardThe tower is struck by lightning only a week after everything is finished. The wind generator, solar panel and battery are all unaffected, but the radio repeater has failed and become an open circuit. Calculate the night-time Thévenin equivalent circuit at the point where the failed radio repeater connects. Note: you should set the solar panel current to zero, but its shunt resistance should remain connectedarrow_forward
- if you are not sure Skip,Do not waste my Question.arrow_forwardFour electricians are discussing wiring under raised floors in information technology equipment rooms. Electrician A says that wiring under the raised floor requires fire-resistant walls, floors, and ceilings between other occupancies. Electrician B says that wiring under the raised floor requires fire resistant halfway up the walls and floors between other occupancies. Electrician C says that the room must employ a disconnecting means that removes half of the power to all equipment in the room. Electrician D says that a disconnecting means isn't necessary for the room. Which of the following statements is correct? A. Electrician B is correct. B. Electrician D is correct. C. Electrician A is correct. D. Electrician C is correct.arrow_forwardWrite a short essay about the difference between an indoor and an outdoor substation. Compare each substation in terms of operation, and setup. specifications,arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
EBK ELECTRICAL WIRING RESIDENTIALElectrical EngineeringISBN:9781337516549Author:SimmonsPublisher:CENGAGE LEARNING - CONSIGNMENT
Electricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning
EBK ELECTRICAL WIRING RESIDENTIAL
Electrical Engineering
ISBN:9781337516549
Author:Simmons
Publisher:CENGAGE LEARNING - CONSIGNMENT
Electricity for Refrigeration, Heating, and Air C...
Mechanical Engineering
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Cengage Learning
What is an electric furnace and how does it work?; Author: Fire & Ice Heating and Air Conditioning Inc;https://www.youtube.com/watch?v=wjAWecPGi0M;License: Standard Youtube License