EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN: 9781337516549
Author: Simmons
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Textbook Question
Chapter 29, Problem 9R
On what basis is the neutral conductor of a service entrance determined? _____
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___________ is an Area on a device characteristic where the ratio between applied voltage and resulting current is constant.
A means shall be provided in each metal box over 100 cubic inches for the connection of an equipment grounding conductor. The means shall be permitted to be ______.
a tapped hole
the cover screw
III. a screw used to mount the box
(a.) I only (c.) I & II only (b.) II only (d.) I, II or III
4.a. The ___ calculated load is rarely placed on an electrical system.A. optionalB. standardC. total
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4.c. You're evaluating the components of a multioccupancy building that won't have an on-site employee. Tobe compliant with the NEC, each occupant will need to have access to their ownA. service-disconnecting means.B. service conductor.C. cable attachment point.D. emergency fire water-pump disconnect.
Chapter 29 Solutions
EBK ELECTRICAL WIRING RESIDENTIAL
Ch. 29 - Prob. 1RCh. 29 - a. What is the unit load per ft2 for the general...Ch. 29 - a. What is the ampere rating of the circuits that...Ch. 29 - Why is the air-conditioning load for this...Ch. 29 - What demand factor may be applied when four or...Ch. 29 - What load may be used for an electric range rated...Ch. 29 - What is the calculated load for an electric range...Ch. 29 - What is the calculated load when fixed electric...Ch. 29 - On what basis is the neutral conductor of a...Ch. 29 - Why is it permissible to omit an electric space...
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- Conductors other than service conductors must not be installed in the same____. A. Service raceway B. Service cable C. Enclosure D. A or Barrow_forward____ current occurs when the system neutral is grounded improperly downstream from the service equipment. Select one: A. PHASED B. OBJECTIONABLE C. POSITIVE D. NEGATIVEarrow_forwardElectric metal tubing (EMT) provides protection from ____. Select one: A. INADVERTENT GROUNDING B. LIGHTENING C. WATER DAMAGE D. ALL BUT SEVERE PHYSICAL DAMAGEarrow_forward
- 1._____ must not be installed beneath openings through which materials may be moved, such as openings in farm and commercial buildings, and must not be installed where they will obstruct entrance to these buildings. A. Overcurrent protection devices. B. Overhead-service conductors C. Grounding conductors D. Wiring systemsarrow_forward____ must not be installed beneath openings through which materials may be moved, such as openings in farm and commercial buildings, and must not be installed where they will bstruct entrance to these building openings. A. Overcurrent protectio devices B. Overhead-service conductors C. Grounding conductors D. Wiring systemsarrow_forwardQUESTION 87 Unless otherwise specified, the applicable product standards evaluate the fill markings covered in 314.28(A)(3), based on conductors with Type _____ insulation. a. RHW b. THHN c. XHHW d. THHWarrow_forward
- QUESTION 9 When a ground wire is connected to an interior gas piping system and the underground portion of the gas pipe into the building is plastic, which of the following is (or are) true? a A.This would be approved by code as the gas pipe is only being bonded to the electrical system. b B.This installation would be approved by code, as the gas pipe is not a grounding electrode. c C.Both A and B d D.Neither A nor Barrow_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_forwarda system or circuit conductor (one that carries current), that is intentially grounded is referred to as _____arrow_forward
- b) Differentiate between Insulated-Neutral and Earthed-Neutral systems as applied to electrical distribution on board ship. c) Explain with sketches why it is necessary that a single ground fault in an insulated-earth distribution system must be located and cleared immediatelyarrow_forward1)The NEC Style Manual indicates that if a term in the NEC appears in more than two articles, it qualifies for a definition in which of the following. a) The articles where the term appears b) Article 90 c) Article 100 d) Table of Contents 2)Definitions of terms related to grounding and bonding and used only in Article 250 are located in ________.a) Article 100 b) Article 200 c) Chapter 9 d) Section 250.2 3)As a general rule, when installing ground rod electrodes, two must be installed always unless a single ground rod provides not more than 25 ohms’ resistance to ground. a) True b) Falsearrow_forward______ protection of equipment shall be provided for solidly grounded wye electrical services of more than 150 volts to ground, but not exceeding 600 volts phase-to-phase for each service disconnecting means rated 1000 amperes or more. Select one: a. arc-fault b. short circuit c ground-fault d. doublearrow_forward
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