ELECTRICAL WIRING:RESIDENTAL-6 PLANS
18th Edition
ISBN: 9781305098329
Author: MULLIN
Publisher: CENGAGE L
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Chapter 28, Problem 6R
a.
To determine
Find the part of a circuit breaker that causes the breaker to trip on an overload.
b.
To determine
Find the part of a circuit breaker that causes the breaker to trip on a short circuit.
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For motor Branch circuits, the maximum setting of a conventional inverse - time circuit breaker must not exceed____of the full- load current of the motor. a.100% b.125% c.200% d.250%
25) What is the type of electrical fault shown in the diagram :
XA) Phase to phase to ground.
(B) Phase to ground.
(C) Three phase short circuit.
(D) Single Phase to phase.
In its simplest form, ____ completes a path through which fault current can flow.
Select one:
A. GROUNDING
B. SHUNTING
C. BONDING
D. BENDING
Chapter 28 Solutions
ELECTRICAL WIRING:RESIDENTAL-6 PLANS
Ch. 28 - What is the minimum size service for a one-family...Ch. 28 - Prob. 2RCh. 28 - Prob. 3RCh. 28 - Prob. 4RCh. 28 - Prob. 5RCh. 28 - Prob. 6RCh. 28 - Prob. 7RCh. 28 - List the standard sizes of fuses and circuit...Ch. 28 - Prob. 9RCh. 28 - Using the method shown in this unit, what is the...
Ch. 28 - State four possible combinations of service...Ch. 28 - Which Code section states that all overcurrent...Ch. 28 - All electrical components have some sort of...Ch. 28 - Arc-fault damage is closely related to the value...Ch. 28 - The utility company has provided a letter to the...Ch. 28 - While working on the main panelboard that is...Ch. 28 - Repeat problem 16 for a main service panel that...Ch. 28 - NEC ______________________________ generally...Ch. 28 - Prob. 19RCh. 28 - Prob. 20RCh. 28 - Overcurrent devices must be accessible. (True)...
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- More amount of power is consumed in _________ fault.arrow_forward[Fill-in-the-blank] in dwelling units shall supply only loads within that dwelling unit or no loads associated only with that dwelling unit. Select one: a. None of these b. Ground-fault protection c. Service-entrance conductors d. Branch circuitsarrow_forward13. A junction point of current paths is often called a _____. Select one: A. CIRCUIT B. COMBINATION C. NODEarrow_forward
- 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.arrow_forwarda) Classify the four categories of 3 phase power system faults we experience in our electrical power industry. b) Explain the emergence of such power systems fault as required in (question 1a)? c) Point out each type of fault specified under (a). d) Produce the (1D) design of the three-phase star connected faults stated under(b)arrow_forwardWhy is it necessary to carry out fault calculations? Compare between the p.u. system method and the referred Ohmic impedance method for fault calculations.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_forwarda) Given the concept of Circuit Breakers discuss five types of circuit breakers and their principle of operation. b) the (1 Dimensional) design of the delta connected three phase Produce faults stated under (question 2ii). c) Using the (question 1.iv) parameters solve for the reactance in per unit(pu) quantity. CR d) Show the three criteria for the selection of a cable for power system distribution network.arrow_forwardWhich fault can cause unacceptable circulating current?arrow_forward
- i. Given the concept of Circuit Breakers discuss five types of circuit breakers and their principle of operation.ii. Produce the (1 Dimensional) design of the delta connected three phase faults .iii. Show the three criteria for the selection of a cable for power system distribution network.arrow_forwardThe magnetic circuit breaker has ______ trip action. a. Instantaneous b. Short c. Delayedarrow_forwardFunction of circuit breaker!arrow_forward
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