Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 19.1, Problem 20R
Proper pressure of the submersible pump system is maintained by a ______________
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_______________ is possible because of the residual magnetism in the stator pole pieces.
2.
Conductors in concealed raceways, even though they may become accessible by withdrawing them, are still considered ____.
Select one:
A. DISTRIBUTED
B. GROUNDED
C. CONCEALED
D. INACCESSIBLE
Electricity, Magnetism, and Waves Activity
Explain the science behind the scenario.
SCENARIO #5: In the science department, we have a set of magnets that we set up to show you ‘levitating magnets’. This is the same process that is used (only at a much grander scale) with magnetic levitating trains. Explain how the magnets must be oriented to get the trains to ‘float’ above the tracks.
Answer: ___________________________________________________________________________________________________________________________________________________
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
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- With no electrical load connected to the generator, no current flows and only a voltage appears at the ___________.arrow_forwardMost conduit and tubing type raceways have a maximum equivalent of four ______ bends between pull points, for example, conduit bodies and boxes. Select one: A. 45 DEGREE B. 180 DEGREE C. 90 DEGREE D. 360 DEGREEarrow_forwardA _____ is a type of surface, flush, or freestanding raceway designed to hold conductors and receptacles, assembled in the field or at the factory. Select one: A. SURFACE NONMETAL RACEWAY B. MULTIOUTLET ASSEMBLY C. SURFACE METAL RACEWAY D. INTERMEDIATE METAL TUBINGarrow_forward
- The control circuit is used to detect and count the number of products being carried on an assembly line. When it counts five products, the circuit energizes a solenoid. The solenoid is energized for a period of two seconds and is then shunts off, causing it to retract? Note: Correct and detailed answer will be Upvoted else downvoted. Thank you!arrow_forward4.) Conductors that supply a single motor used in a continous duty application sall have an ampacity of __________________ of the motor's full load current rating. a.) Not less than 300%b.) Not less than 125%C.) Not less than 250%d.) None of the above 5.) The _________ on the nameplate of motor is an indication of the overload capacity of the motor a.) Code letterb.) Design Letterc) Insulation classd.) None of the above 6.) The __________ describes motor's ability to withstand temperature overtime a.) Code letterb.) Design letterc.) insulation classd.) None of the abovearrow_forward6. Ferrous metal raceways or enclosures are made with _______ content.A. brass or aluminumB. steel or brassC. aluminum or ironD. iron or steelarrow_forward
- Critical clearing time depends on _____________________ of the power system. a. Clearing time b. Critical Clearing angle c. Electrical Output Power d. Moment of Inertiaarrow_forwardIf a raceway contains five conductors, they allowable ampacity of the conductors must be derated by___%. A. 60 b. 70 c. 80 d. 90arrow_forward10. When working on __ feet or more, a safety harness is required. 11. True or False: The ratio for a straight ladder is 1’ to 4’ (1:4) 12. What does GFCI stand for? 13. At what amperage differences will a GFCI trip? 14. What do DC and AC stand for? 15. True or False: An electron holds a positive charge 16. The grounded conductor is known as? _____________ 17. If a circuit has no resistance bet live and neutral it is a? ____________ 18. What does electricity produce? 19. 550 foot pounds per seconds are equal to? ______________ 20. What is the formula to calculate Wattage, when Voltage and current are know? 21. What is wattage, if 3amps are on 120V? 22. What is wattage, if 10amps are on 240V? 23. What is wattage, if 5amps are on 240V? 24. What is wattage, if 30amps are on 240V? 25. What is wattage, if 16amps are on 120V?arrow_forward
- Does the NEC allow submersible pump cable to be buried directly in the ground? _____________________________________________________________________ _____________________________________________________________________arrow_forward#10 When selecting conductors, from where is the motor full - load ampere rating to be takenarrow_forward____ current occurs when the system neutral is grounded improperly downstream from the service equipment. Select one: A. PHASED B. OBJECTIONABLE C. POSITIVE D. NEGATIVEarrow_forward
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