Electrical Wiring Residential
19th Edition
ISBN: 9781337101837
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 32, Problem 11R
The NEC requires that a ____________ means be provided for standby power systems. In the case of portable gen sets, this might be as simple as pulling out the plug on the extension cord that is plugged into the receptacle on the gen set. For permanently installed standby power generators, this might be on the gen set and/or separately provided inside or outside of the home.
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5. An automatic switch or cutout is allowed in the equipment grounding conductor circuit when
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Chapter 32 Solutions
Electrical Wiring Residential
Ch. 32 - Prob. 1RCh. 32 - Where would the logical location be for running a...Ch. 32 - Prob. 3RCh. 32 - Prob. 4RCh. 32 - Prob. 5RCh. 32 - Is it permitted to ground the neutral conductor of...Ch. 32 - Briefly explain the function of a transfer switch....Ch. 32 - When a transfer switch transfers to standby power,...Ch. 32 - A typical transfer switch for residential...Ch. 32 - Prob. 10R
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- 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_forwardGenerators can be connected to the electrical system of the residence in several ways (Select all answers that apply) Group of answer choices A. permanent generator where the neutral is not switched by the transfer switch B. portable generator that has the neutral bonded to the frame and is connected to the dwelling electrical system transfer equipment by a flexible cord C. permanent generator where the neutral is switched by the transfer switch D. portable generator that has the neutral isolated or floated from the frame and is connected to the dwelling electrical system transfer equipment by a flexible cordarrow_forwardQUESTION 4 a) State three each: “ DOs “ and “ DON'Ts “ associated with electrical equipment operation on board ship. b) Differentiate between open circuit fault, earth fault and short circuit fault. Which of these has the most devastating effect and why?arrow_forward
- 6. According to the NEC, allowance for the future expansion of installations isA. an exception.B. in everyone's best interest.C. defined.D. a requirement.arrow_forwardExplain the concept of load shedding and the criteria used to determine which loads should be shed during a system emergency.arrow_forwardRefer to the National Electrical Code or the working drawings when necessary. Whereapplicable, responses should be written in complete sentences.A 300-kilovolt-ampere transformer bank consisting of three 100-kilovolt-amperetransformers has a 3-phase, 480-volt delta primary and a 120/240-volt, 3-phase, 4-wiredelta-connected secondary.For problems 1 through 4 show calculations and/or source of information. 1. Sketch the secondary connections, and indicate where a 120-volt load couldbe connected.arrow_forward
- The term "____" is defined in NEC® Article 100 as "connected to establish electrical continuity and conductivity." Select one: A. BENDED (BENDING) B. BONDED (BONDING) C. SHUNTED (SHUNTING) D. GROUNDED (GROUNDING)arrow_forwardAn emergency system of feeders and branch circuits that provides adequate power to patients and personnel. It must automatically connect to an alternate power source such as a generator when the normal power source is interrupted. CHOICES: A. Multiwire Branch Circuit B. Live Safety Branch Circuit C. Critical Branch Circuit D. multiple purpose Branch Circuit E. General Purpose Branch Circuit F. individual Branch Circuit G. Life Safety Branch Circuit CHOICES: A. Multiwire Branch Circuit B. Live Safety Branch Circuit C. Critical Branch Circuit D. multiple purpose Branch Circuit E. General Purpose Branch Circuit F. individual Branch Circuit G. Life Safety Branch Circuitarrow_forwardKindly choose the correct answer. Please answer it ASAP if you can, thanksarrow_forward
- 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.…arrow_forwardWhat is the reason why the cable trays must be connected to the grounding sytem and all metal parts in power plant operation. Can you please expalain why it is cable trays ,ust be electrically and mechanically connected to the grounding system.arrow_forwardschedules are typically provided to detail the circuits and overcurrent protection required for listribution equipment. Branch-circuit - Outlet C. d. ore distribution points for electrical in .... Switch Panelboardarrow_forward
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