ELECTRICAL WIRING:RESIDENTAL-6 PLANS
18th Edition
ISBN: 9781305098329
Author: MULLIN
Publisher: CENGAGE L
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Chapter 27, Problem 19R
a.
To determine
Find whether it is allowed to ground a residential rural electrical device to driven ground rods only when a metallic water system is available.
b.
To determine
Find the section of the codes that applies to the statement described in part (a).
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Equipment Grounding
10. Which of the following statements about ground faults is true?A. They usually occur between any grounded circuit conductor and the equipment grounding conductor. B. They're often normal and typically intentional.C. They can't result from human error.D. They can happen if a conductive tool is dropped in an energized equipment's electrical enclosure.
12. Which of the following statements about ground faults is true?A. They can happen if a conductive tool is dropped in an energized equipment's electrical enclosure.B. They usually occur between any grounded circuit conductor and the equipment grounding conductor.C. They can't result from human error.D. They're often normal and typically intentional.
2. Imagine that you're asked to install an auxiliary grounding electrode at the base of a lighting pole in aparking lot. This auxiliary grounding electrode will be connected to theA. lighting pole's electrical service equipment grounding conductor.B. electrical service's grounding electrode conductor.C. next lighting pole's auxiliary grounding electrode.D. lighting pole's neutral conductor.
Chapter 27 Solutions
ELECTRICAL WIRING:RESIDENTAL-6 PLANS
Ch. 27 - Define the Service Point. ______________Ch. 27 - Define service-drop conductors.Ch. 27 - Prob. 3RCh. 27 - a. The service head must be located (above)...Ch. 27 - Prob. 5RCh. 27 - When a conduit is extended through a roof, must it...Ch. 27 - a. What size and type of conductors are installed...Ch. 27 - How and where is the grounding electrode conductor...Ch. 27 - What are the minimum distances or clearances for...Ch. 27 - What are the minimum size ungrounded conductors...
Ch. 27 - What is the minimum size copper grounding...Ch. 27 - What is the recommended height of a meter socket...Ch. 27 - Prob. 13RCh. 27 - Prob. 14RCh. 27 - Prob. 15RCh. 27 - Prob. 16RCh. 27 - Prob. 17RCh. 27 - Prob. 18RCh. 27 - Prob. 19RCh. 27 - Prob. 20RCh. 27 - Prob. 21RCh. 27 - Prob. 22RCh. 27 - Prob. 23RCh. 27 - Prob. 24RCh. 27 - Prob. 25RCh. 27 - Prob. 26RCh. 27 - Prob. 27RCh. 27 - Prob. 28RCh. 27 - Prob. 29RCh. 27 - Prob. 30RCh. 27 - Prob. 31RCh. 27 - Prob. 32RCh. 27 - Prob. 33RCh. 27 - Prob. 34RCh. 27 - Prob. 35RCh. 27 - Prob. 36RCh. 27 - Prob. 37RCh. 27 - Prob. 38RCh. 27 - Prob. 39RCh. 27 - Prob. 40RCh. 27 - Prob. 42RCh. 27 - Prob. 43RCh. 27 - Prob. 44RCh. 27 - Prob. 45RCh. 27 - Prob. 46RCh. 27 - Prob. 47RCh. 27 - Prob. 48R
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- 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_forwardGrounding Lighting Fixtures. There are specific requirements for grounding lighting fixtures. How must they be grounded and with what size conductors? Be sure and cite the code in your answers.arrow_forward6. 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_forward
- 8.a. A _______ conductor does not carry current during normal operation.A. neutralB. groundingC. phaseD. grounded8.b. "The complete path of an electric current" describes an electric(al)A. fault.B. circuit.C. source.D. component.arrow_forwardElectrical plants Define the terms "Main column ." " Line ." " Protection earth " and " Operating eartharrow_forwardNEC identifies ____ types of rigid PVC conduit. Select one: A. FIVE B. TEN C. THREE D. TWOarrow_forward
- Raceway fill calculations are a prerequisite in ____ needed for particular circuits. Select one: A. MATERIAL REQUIREMENTS B. SCHEMATIC REQUIREMENTS C. DETERMINING THE SIZE OF RACEWAY D. CIRCUIT LOADSarrow_forward- Loads, Service, and Overcurrent Protection 6.a. The general lighting load is based on a _______ per square foot basis.A. kilowattB. number of circuitsC. volt-ampereD. general illumination6.b. What's the primary disadvantage of using copper conductors?A. AvailabilityB. WeightC. CostD. Durabilityarrow_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
- 24. The National Electrical Code® _____ contains tables dealing with conductors for general wiring. Select one: A. 100 B. 110 C. 310 D. 300arrow_forwardTo testing installation of grounds, the usual procedure is to connect one lead of the megohmmeter to one of the conductors, then the other lead is___. A, connected to another conductor b, connected to the conduit or raceway c. Connected to a special grounding electrode on the megohmmeter d. Left unconnectedarrow_forward45. A switch or circuit breaker can be used as both the controller and disconnecting means if it a. opens all ungrounded conductors as required by NEC 430.103 b. is protected by an overcurrent device in each ungrounded conductor c. is manually operable, or both power and manually operable d. All of these answersarrow_forward
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