EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN: 9781337516549
Author: Simmons
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Chapter 30, Problem 8R
To determine
Explain whether the conductors are allowed to run overhead the swimming pool.
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To 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 unconnected
2.
Conductors in concealed raceways, even though they may become accessible by withdrawing them, are still considered ____.
Select one:
A. DISTRIBUTED
B. GROUNDED
C. CONCEALED
D. INACCESSIBLE
4.a. The ___ calculated load is rarely placed on an electrical system.A. optionalB. standardC. total
4.b. What's the primary disadvantage of using copper conductors?A. CostB. AvailabilityC. Weight
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.
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EBK ELECTRICAL WIRING RESIDENTIAL
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- 6. Ferrous metal raceways or enclosures are made with _______ content.A. brass or aluminumB. steel or brassC. aluminum or ironD. iron or steelarrow_forwardConductors other than service conductors must not be installed in the same____. A. Service raceway B. Service cable C. Enclosure D. A or Barrow_forwardequipment grounding 1. The only exception to the need for all information technology equipment to be satisfactorily grounded is where the equipment is A. DC powered.B. backup generator powered. C. double-insulated.D. isolated equipment. 2. Which section of the National Electrical Code lists sizing requirements for wire-type equipment grounding conductors? A. 250.66 B. 250.118 C. 250.4 D. 250.122arrow_forward
- 7. What can you conclude about the sum of potential differences in a circuit loop? 8. What is the current in the loop? ____A?arrow_forwardConductors shall be arranged so the power distribution block terminals are _____ following installation. Select one: A. INSIGHT B. AVAILABLE C. ACCESSIBLE D. UNOBSTRUCTEDarrow_forwardElectricity, Magnetism, and Waves Activity Explain the science behind the scenario. SCENARIO #5: In the science department, we have a set of magnets that we set up to show you ‘levitating magnets’. This is the same process that is used (only at a much grander scale) with magnetic levitating trains. Explain how the magnets must be oriented to get the trains to ‘float’ above the tracks. Answer: ___________________________________________________________________________________________________________________________________________________arrow_forward
- 7.A. Ferrous metal raceways or enclosures are made with _______ content.A. steel or brassB. aluminum or ironC. brass or aluminumD. iron or steel7.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.arrow_forwardA 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 IIIarrow_forward1.a. Section 300.15(C) requires a fitting to be installed on each end of a conduit or tubing being used toprovide support or protection to protect the cable fromA. hazardous vapors.B. direct sunlight.C. abrasion.D. extreme heat or cold.1.b. Typically, a/an _______ is a better electrode than a ground rod because it provides a greater surface areafrom which the electrons can be dissipated.A. continuous grounding conductorB. clamp-on ground resistance meterC. rebarD. OCPDarrow_forward
- Overhead service-drop conductors must have a horizontal clearance of __ from a pool. A. 6 ft B. 10 ft C. 8 ft D. 4 ftarrow_forwardWhat follows is a numeric fill in the blank question with 3 blanks. Figure 1 shows the three phases V-t graph in Turkey. Please write the indicated values with their units in boxes and Voltage - time function of each phase in table below. Please write the units in the second box. 1= _______________ V 2= ________________ms 3= _______________msarrow_forwardA cable wire maybe coaxial or twisted. Coaxial costs 25 centavos per meter while twisted wire costs only 18 centavos. The soldering cost for coaxial wire is P1.30 per connection, for twisted wire P1.70. What length of cable run will make the cost of installing coaxial equal to that of the twisted wire. Assume that the number of soldered connection is 350. ANSWER_____________marrow_forward
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