20.a. What's the primary disadvantage of using copper conductors? A. Durability B. Cost C. Availability D. Weight 20.b. The NEC requires that each service-disconnecting means be suitable for A. hazardous locations. B. disconnecting the meter. C. wet conditions. D. the prevailing conditions 20.c. As a general rule, each building or structure is limited to a single service. What's an automatic exception to this rule? A. A second service deemed suitable for use B. A second service having the proper markings C. Emergency systems or fire pumps D. Higher building occupancy

20.a. What's the primary disadvantage of using copper conductors? A. Durability B. Cost C. Availability D. Weight 20.b. The NEC requires that each service-disconnecting means be suitable for A. hazardous locations. B. disconnecting the meter. C. wet conditions. D. the prevailing conditions 20.c. As a general rule, each building or structure is limited to a single service. What's an automatic exception to this rule? A. A second service deemed suitable for use B. A second service having the proper markings C. Emergency systems or fire pumps D. Higher building occupancy

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter5: Conductor Identification, Switch Control Of Lighting Circuits, Bonding/grounding Of Wiring Devices, And Induction Heating

Section: Chapter Questions

Problem 23R: Define an equipment grounding conductor.

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Similar questions

c.1. Which of the following is one of the three essential functions of an equipment grounding conductor?A. Provide an arc-fault current pathB. Establish groundingC. Establish bondingD. Ensure the system is groundedc.2. What's another name for the three-point method of Earth resistance testing?A. Fall-of-potentialB. Line surgeC. Spatial shieldingD. Leakage current c.3. If the National Electrical Code provides a requirement to ground equipment, it generally implies thatthere will be a direct connection to the Earth of a connection through a/anA. grounding electrode conductor.B. equipment grounding conductor.C. equipotential bonding conductor.D. bonding conductor.
h.1. In an alternating-current system, the maximum size for a copper grounding electrode conductor isA. 250 kcmil.B. 3/0.C. 500 kcmil.D. 4/0. h.2. The figure shows a fault condition in an ungrounded electrical system. Which of the following will occurbecause of the fault in this system?A. Only the overcurrent protector at Point A will trip open.B. The ground fault will heavily damage the service.C. Nothing will happen until a second ground fault occurs.D. The overcurrent protection will trip, shutting off all the line side power.
7.B. The size of a grounding electrode conductor for a service or separately derived system is generally basedon the size of the largestA. ungrounded supply conductor.B. equipment grounding conductor.C. grounded electrode.D. bonding jumper.7.C. Which of the following statements about bonding is true?A. The joint or termination must offer opposition in the circuit for effective electrical connections.B. Effective bonding keeps impedance high if a fault should occur.C. The entire electrical safety circuit is only as good as its strongest bonded link.D. Bonding connections must endure high levels of fault current until overcurrent protective devices can operate.
3. The three bus-bar conductors in an outdoor sub-station are supplied by units ofpost insulators. Each unit consists of a stack of 3-pin insulators fixed one on the top of the other. The voltage across the lowest insulator is 8-45 kV and that across the next is 7-25 kV. Find the bus-bar voltage of the station. [38-8 kV]
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