ELECTRICAL WIRING:RESIDENTAL-6 PLANS
18th Edition
ISBN: 9781305098329
Author: MULLIN
Publisher: CENGAGE L
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Textbook Question
Chapter 19.1, Problem 18R
Because the controller contains the motor starting relay and the running and starting capacitors, the motor itself contains ______.
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The back emf in a dc motor is ___________________?.
1-opposes the applied voltage
2- aids the applied voltage
3- opposes the field current
4- aids the armature current
Draw the power circuit and control circuit of a Direct On Line Motor Starter fo a three-phase motor. Add 4 pilot lights (PL) in the control circuit; red PL for running forward, orange PL for running in reverse, green for not running and yellow for overload.1. List the components used.
2. Procedures.
In three-point starter, as a starting handle is rotated __________a) The resistance is added into armature circuitb) The resistance is removed from field circuitc) The resistance is added into field circuitd) Resistance is neither added nor removed
Chapter 19 Solutions
ELECTRICAL WIRING:RESIDENTAL-6 PLANS
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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- 1. Fill in blanks. (1) can be used to prevent short-circuit. (2)There are two kinds of commander apparatuses which are and is often used to prevent motors from long-term overload. (4)According to the type of current passing through the main contact, electromagnetic contactors are classified into and (5)In multi-position control circuit, the start buttons are connected in are connected in (6)The partial-voltage starting includes starting and , the stop buttons starting.arrow_forwardFor the Starting Up the Power Station Simulator Why are certain operations blocked by isolatorsarrow_forwardIf an electrical defect occurs in the electronic powersteering(EPS) system, __ .a. the system continues to operate normally, but theEPS warning light is illuminatedb. the system continues to operate with a slightlyreduced power-steering assistc. the EPS control unit shuts the system down byopening the fail-safe and power relaysd. the EPS control unit locks the armature in thesteering gear to prevent armature and screw shaftdamagearrow_forward
- The NEC is very specific in its requirement that submersible electric water pump motors be grounded. Where is this specific requirement found in the Code? _______________________________________________________________________ _______________________________________________________________________arrow_forward20.a. A capacitive sensor is used to detect the presence of _______ objects.A. ferrousB. nonmovingC. nonconductiveD. magnetic20.b. A three-phase motor can be made to run backwards byA. connecting a resistor in series with the armature.B. reversing the control voltage connections.C. reversing three of its power leads.D. reversing two of its power leads.arrow_forwardThe 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_forward
- Two point starter can be used to start the three phase shunt generator/motor. Select one: True Falsearrow_forwardWhile discussing armature testing: Technician A says to test for shorts, place the ohmmeter leads on a commutator segment and armature shaft. Technician B says that continuity should exist between the commutator and the armature shaft. Who is correct?arrow_forwardIdentify the system which has low stability. a. None of the above b. Open loop and Closed loop system c. Open loop System d. Closed loop systemarrow_forward
- Explain the working of induction cup relay with the help of diagram.Explain all the parts in detail with diagram.arrow_forwardDraw the simple Motor Start/Stop Control circuit we have been working with in class. Be sure to label all the components, lines, and voltages in the circuit. At the bottom of the drawing, list the 5 parts of Motor Control Circuits.arrow_forwardc) Draw the block diagram of a closed loop synchronous visalight aroust 1095 R$250 Volod bogge motor drive from VSI and explain.arrow_forward
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