Electrical Wiring: Residental - With Plans (Paperback) Package
18th Edition
ISBN: 9781305416376
Author: MULLIN
Publisher: Cengage
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Textbook Question
Chapter 26, Problem 8R
Circle the correct answer from the following statements:
- a. Smoke alarms installed in new one- and two-family homes must be interconnected so that if any one of them is triggered, all other alarms will also sound off.
- b. Smoke alarms installed in new one- and two-family homes are not permitted to be interconnected so that each alarm will operate independently of all other alarms in the home.
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1- What is done to prevent a plan from becoming confusing because of too much detail?
2. Does compliance with the NEC always result in an electrical installation that is adequate, safe, and efficient? Why?
3. Name two nationally recognized testing laboratories.
4- Are low-voltage systems totally safe? Explain
5- Explain briefly what an arc flash is
6- Where might you obtain information about on-the-job safety and safety training?
Question 3:
Suppose an engineer designed a fire alarm system for a large warehouse, with multiple
pushbutton switches connected to a single alarm siren:
Siren
Actuating any of the normally-open switches results in the alarm sounding. So far, so good.
Now, suppose that one of the wires connecting one side of several switches to the rest of
the circuit breaks open. What will the result of this failure be?
Siren
break!
2. When working on a high - voltage system , it is best to keep anyone who is not part of the ser vice away from you and the car by creating a buffer zone around the car . Technician A makes sure the outside edges of the zone are at least one foot away from the car . Technician B places B orange cones to define the outer boundaries of the zone. Who is correct ?
Chapter 26 Solutions
Electrical Wiring: Residental - With Plans (Paperback) Package
Ch. 26 - In your own words, explain the terms alarm and...Ch. 26 - The requirements for household fire alarm systems...Ch. 26 - Do heat alarms and carbon monoxide alarms take the...Ch. 26 - Name two basic ways that smoke alarms are powered.Ch. 26 - Name the two types of smoke alarms.Ch. 26 - List the absolute minimum level of smoke alarm...Ch. 26 - Circle the correct answer from the following...Ch. 26 - Circle the correct answer from the following...Ch. 26 - Circle the correct answer from the following...Ch. 26 - Prob. 10R
Ch. 26 - Prob. 11RCh. 26 - An important but often overlooked requirement in...Ch. 26 - Carbon monoxide is ____________, and is...Ch. 26 - Circle the correct answer from the following...Ch. 26 - The wiring of more complex household fire alarm...Ch. 26 - Circle the correct answer from the following...Ch. 26 - Circle the correct answer from the following...Ch. 26 - Fire alarm cable generally used in more complex...Ch. 26 - When installing a fire alarm system or a complete...Ch. 26 - Residential sprinkler fire protection systems are...
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- Circle the correct answer from the following statements: a. Always connect a fire alarm circuit or system to a power supply that has ground-fault circuit interrupter (GFCI) protection. b. Never connect a fire alarm circuit or system to a power supply that has ground-fault circuit interrupter (GFCI) protection. c. It makes no difference whether the branch circuit is GFCI or AFCI protected because the alarms are required to have battery backup power. In the event of a loss of power for whatever reason, the alarms would still be operative.arrow_forwardList the rooms and/or areas in a newly constructed single-family residence where arc-fault circuit-interrupter (AFCI) protection is required by the NEC.arrow_forwardThe requirements for household fire alarm systems are found in what NFPA Code and in what chapter of this Code?arrow_forward
- The following problems pertain to luminaires in clothes closets. a. Does the Code permit bare incandescent lamps to be installed in porcelain key-less or porcelain pull-chain lampholders? ________________ b. Does the Code permit bare fluorescent lamp luminaires to be installed? ________________ c. Does the Code permit pendant lampholders to be installed? ________________ d. What is the minimum clearance from the storage area to surface-mounted incandescent luminaires? ________________ e. What is the minimum clearance from the storage area to surface-mounted fluorescent luminaires? ________________ f. What is the minimum distance between recessed incandescent or recessed fluorescent luminaires and the storage area? ________________ g. Define the storage area. ______________________________________ ______________________________________ ______________________________________ ______________________________________ ______________________________________ ______________________________________ h. If a clothes hanging rod is installed where there is access from both sides, such as might be found in a large walk-in clothes closet, define the storage area under that rod. ___________________________________ ___________________________________arrow_forwardThe easiest place to install an ammeter into a stepper motor driver/motor circuit for system diagnostics is to attach the meter in series with the driver’s power supply lead. remove a fuse and place the meter leads across the fuse clips. disconnect a motor lead and attach the meter in series with that lead. connect the meter across the center tap and phase leads of the motor.arrow_forwardGive me about ten examples of electrical code violations in maintenance and repair. Hopefully the explanation is detailed and better if there is a picture with references.arrow_forward
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- (b) An employee is working on a ladder and the ladder seems to collapse. The employee falls off the ladder and breaks arm. The investigation reveals the following details: • Employee had worked seven 12-hour shifts in a row. • Accident happened at end of shift. • Employee was standing on the top step of the ladder (an unsafe action). The employee was approximately 10 feet above floor level. No fall arrest or restraint system was used. • A ladder inspection policy is in place, but there is no evidence that the ladder has ever been inspected. Investigation reveals the ladder was damaged and did not provide a stable working platform in any environment. • Interview with the facility manager reveals that he did not inspect the ladder when it was due for inspection. He was aware that the ladder needed to be inspected. (i) Examine either accident investigation is required or not. (ii) Discover SIX (6) factors and possible causes affecting the incidences. (iii) Explain the root cause of the…arrow_forwardDo heat alarms and carbon monoxide alarms take the place of smoke alarms? Explain.arrow_forwardladder diagram for three circuits, circuit A is one lampholder and one duplex receptacle controlled by a single pole switch, circuit B is a single pole switch controlling the top half of a duplex receptacle that when energized, is indicated by a pilot light at the single pole switch location plus an isolated ground duplex receptacle that is always hot, circuit C is the bottom half of the switched receptacle on circuit B is to be always hot plus another duplex receptacle that is controlled from two locations using coast 3-way wiring system two circuits are 3-wire multiwire branch circuitarrow_forward
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