Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 15, Problem 19R
The Code states that a means must be provided to disconnect an appliance. In the case of an electric clothes dryer, the disconnecting means can be (Circle the correct statemen(s).)
- a. a separate disconnect switch located within sight of the appliance.
- b. a separate disconnect switch located out of sight from the appliance. The switch is capable of being locked in the OFF position.
- c. a cord-and-plug-connected arrangement.
- d. a circuit breaker in a panel that is within sight of the dryer or capable of being locked in the OFF position.
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Students have asked these similar questions
Lockout is required:
During servicing and maintenance where unexpected ener-
gization or start-up of equipment could harm employees.
During repair and replacement work, and during renovation
work.
a.
b.
C.
During modifications or other adjustments to powered
equipment.
d.
All of the above.
Lockout may involve:
Opening a disconnect switch.
b.
a.
Closing a valve.
Placing a block in the equipment.
d. All of the above.
C.
Lockout is the process ci
Shutting off a machine at the end of a shift.
Warning equipment operators about the risks involved in
bypassing a machine guard.
Preventing the flow of energy from a power source to a
piece of equipment, and keeping it from operating.
a.
b.
C.
d.
Preventing mechanics from starting repairs without the
machine operators' knowledge.
Tagout:
Serves as a warning.
b. Physically restrains a person from operating a power source.
Must be applied using specialized tagout tools.
a.
C.
d.
Must be worn like a badge by the employee who is doing
the repairs.…
18. A suitable disconnecting means for a fixed appliance is a
A. pigtail cord.
B.light switch that interrupts the hot wire.
C. circuit breaker.
D. two-pole switch that interrupts the common wire.
7. Which statement is true for the process-control relay ladder diagram shown in the figure?
A. The pressure switch, temperature switch, and push button must be closed for the motor to start.
B. With the temperature switch closed, the motor will start once the push button is pressed.
C. With the pressure switch closed and the push button released, the motor will start.
D. Only the temperature switch has to close for the motor to start.
Chapter 15 Solutions
Electrical Wiring Residential
Ch. 15 - Prob. 1RCh. 15 - Prob. 2RCh. 15 - What special type of switch is controlling the...Ch. 15 - Prob. 4RCh. 15 - The total estimated volt-amperes for Circuit B10...Ch. 15 - If an attic is accessible through a scuttle hole,...Ch. 15 - Prob. 7RCh. 15 - Prob. 8RCh. 15 - The following is a layout of the lighting circuit...Ch. 15 - Prob. 10R
Ch. 15 - Prob. 11RCh. 15 - a. What is the minimum power demand allowed by the...Ch. 15 - What is the maximum permitted current rating of a...Ch. 15 - Prob. 14RCh. 15 - a. Must the metal frame of an electric clothes...Ch. 15 - An electric dryer is rated at 7.5 kW and 120/240...Ch. 15 - When a metal junction box is installed as part of...Ch. 15 - A residential air-conditioning unit is installed...Ch. 15 - The Code states that a means must be provided to...
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