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 16R
What is the maximum ampere setting permitted for running overload protection of the 1-horsepower, 240-volt pump motor? ____________________
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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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- The disconnecting means for a motor controller shall be designed so that it does not _______ automatically per NEC 430.103 A. Open B. Close C. Restart D. Shutdownarrow_forwardAll answers should be written in complete sentences. Calculations should be shown in detail, and Codereferences should be cited when appropriate. Unless otherwise stated, all conductors are copper type THHN, and the supply is AC. 1. What is the rated full-load current of a ¾-horsepower, 208-volt single-phase motor?arrow_forwardBranch-circuit conductors supplying a single continuous-duty motor shall have an ampacity not less than _____ rating A. 125% of the motor’s nameplate current B. 125% of the motors full-load current as determined by 430.6(a)(1) C. 125% of the motor’s full locked-rotor D. 80% of the motors full-load current.arrow_forward
- Manual Motor Starters: Manual motor starters are available for motors up to 10 hp, 3 phase, 600 volts. Will provide overload protection. Must be rated in hp equal to that of the motor served. Location of this switch must be such that the operator can easily determine that it is safe to start the motor. May also serve as disconnect, BUT MUST THEN BE LOCATED WITHIN 9m (30 ft.) AND WITHIN SIGHT OF THE MOTOR. L1 L2 L3 ON Ot o· Drum Switch O- OM O5 (МОTOR FIGURE 2 Manually draw in, and label, the connections you will use to connect the motor. Draw this circuit, fully labeledarrow_forwardText pleasearrow_forwardAll answers should be written in complete sentences. Calculations should be shown in detail, and Codereferences should be cited when appropriate. Unless otherwise stated, all conductors are copper type THHN, and the supply is AC. 1. What size conductor would be required to supply three motors connected to a 440-volt, 3-phase branch circuit? Motor #1 is a 50-horsepower, code B induction motor;motor #2 is a 40-horsepower, code H induction motor; and motor #3 is a 50-horsepower, code J induction motor.arrow_forward
- 1. The starting current of an AC motor is _____________ the rated current.arrow_forwardRead the instructions carefully and do accordinglyarrow_forwardAll answers should be written in complete sentences. Calculations should be shown in detail, and Codereferences should be cited when appropriate. Unless otherwise stated, all conductors are copper type THHN, and the supply is AC. 1. What is the full-load current of a 500-volt, DC, 20-horsepower motor?arrow_forward
- True or False 1. The point of connection of a motor for its electrical supply is called junction box. 2. The bearing placed in the shaft of the generator is included as stator part. 3. Basically, not all generators are AC generator at first, even DC generator 4. DC generator can be used as an emergency generator. 5. Circuit breakers are used in a motor circuit protection rather than fuses (safety switch).arrow_forwardGRADES: Three-phase system 208 volts All conductors at 75 degrees Celsius Use the maximum standard protections All motors are squirrel cage. 1. System main switch (inverse time switch) 2. Main conductors plus their grounding (ambient temperature is 30 Celsius degrees) 3. Grounding of the grounding electrode and its electrodes (use a delta landing) 4. The main system pipe 5. For 4 motors with nameplate data, see images (they make up a branch of the system) calculate for each:arrow_forwardthe largest overload heater is ____ amperes.arrow_forward
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