Delmar's Standard Textbook of Electricity (MindTap Course List)
6th Edition
ISBN: 9781285852706
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 9, Problem 6RQ
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Value of Current I1
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Equipment Grounding
13. A metal elbow is a part of a nonmetallic, underground raceway. The elbow won't need to be grounded as long as it's encased in at least _______ inches of concrete.
A. 4 B. 5 C. 2 D. 6
13 A. Which of the following can be in the form of a wire and is required to be installed with feeders and branch circuits?
A. Phased neutral conductorB. Equipment grounding conductor C. Grounded neutral conductorD. Grounding electrode conductor
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Delmar's Standard Textbook of Electricity (MindTap Course List)
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- What are the minimum distances or clearances for the following? a. Overhead service conductor clearance over private driveway _____________ b. Overhead service conductor clearance over private sidewalks _____________ c. Overhead service conductor clearance over alleys ______________________________ d. Overhead service conductor clearance over a roof having a roof pitch of not less than 4/12. (Voltage between conductors does not exceed 300 volts.) _______________ e. Overhead service conductor horizontal clearance from a porch _______________ f. Overhead service conductor clearance from a fence that can be climbed on _________arrow_forwardCalculate the watts loss and voltage drop in each conductor in the following circuit. Show calculations. Obtain resistance data from Table 8, Chapter 9, of the NEC.arrow_forwardEquipment 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.arrow_forward
- please create a venn diagram using words given in the box to contrast and compare electric motor and electric generatorarrow_forwarda system or circuit conductor (one that carries current), that is intentially grounded is referred to as _____arrow_forwardAre double locknuts an acceptable bonding method for Class 1, Division 1 Hazardous locations? If not, list an acceptable method, backing up your answer with a code citation.arrow_forward
- Draw two types of counterpoises for transmission towers. Mention the condition that you use each of these two methods.arrow_forwardcorrect and detailed answerarrow_forwardExposed non-current-carrying metallic parts of electrical equipment must be grounded if installed within _______________ ft (______________ m) vertically or ____________ ft (______________ m) horizontally of bathtubs, plumbing fixtures, pipes, or other grounded metal work or grounded surfaces.arrow_forward
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