EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN: 9781337516549
Author: Simmons
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Textbook Question
Chapter 31, Problem 7R
When selecting cables for a structured wiring system or computer hookups, the best choice is to select a cable that has
- a. untwisted pairs of conductors.
- b. twisted pairs of conductors.
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- D.1-. Which of the following names is commonly used for armored cable on commercial and industrial jobsites?A. RomexB. BXC. ECGD. MCD.2. Which of the following is the most common type of conductor termination used in commercial andindustrial wiring applications?A. A pressure connectionB. A wire nutC. A wire spliceD. A crimped connection D.3. Which of the following terms correctly describes a ventilated metal enclosure that supports powerdistribution conductors of up to 8000 A and 69 kV, and that allows for proper phase arrangement of theconductors?A. A trolley busB. A channel racewayC. A cablebusD. A feeder busarrow_forwardWhat is the different b/w solid type cables and pressure cables (oil and gas)... The course is power transmission system and the topic is under ground cables...arrow_forwardc.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.arrow_forward
- A set of conductors is used to supply residential unit with a total load current of 60 A at a single-phase supply voltage of 230 V. What would be the minimum size of the conductor to be used to achieve at least 5% voltage drop? The total conductor length is 300 ft. ..arrow_forwardWhat are the colors of the conductors in nonmetallic-sheathed cable for a. 2-wire cable? _______________, _______________ b. 3-wire cable? _______________, _______________, _______________arrow_forwardWhat is the super tension cable and application,ratingarrow_forward
- 9. Which grounding method is typically required of higher-voltage systems? A. Grounding through inductorsB. Grounding through a low amount of resistanceC. Grounding through a high-impedance device D. Grounding through surge arresters 10. Which term relates to the conductors connected to the output side of a separately derived system? A. Neutral conductorB. Transformer secondary conductorC. System conductor D. Derived phased conductor 11. If there's no service disconnect at a remotely supplied building, then the grounding electrode conductor and the equipment grounding conductor can be bonded together at a A. junction box.B. structural steel location. C. grounding electrode rod. D. water line. 12. In a DC system, the bonding jumper between the negative of the supply and ground is normally made at the source or at the A. first disconnecting means. B. first device on the supply. C. end of the DC line.D. entrance to the building. 13. Which of the following is a common raceway…arrow_forwardDefine. What happens when you use cables longer than the prescribed length in a network?.arrow_forwardA DC is supplied through a solid conductor cable. The fault in the cable can be determined by using Murray Loop Test. The healthy cable has the insulation resistance of 1 kilo Ohms per meter. No fault occurred till the first 10 km. The core of healthy cable has the circumference of 7.86cm. If the resistivity of insulation is 900 G Ohm-mm, what is the diameter of the cable.arrow_forward
- What are two advantages of using twisted pair cabling over coaxial cabling on a network? a. Twisted pair cable is more reliable. b. Twisted pair cable is less expensive. c. Twisted pair cable is more resistant to noise. d. Twisted pair cable is more resistant to physical damage. e. Twisted pair cable is required for modern transmission standards.arrow_forward3. 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]arrow_forwardThe Aluminum Electrical Conductor Handbook lists a dc resistance of 0.01558 ohm per 1000 ft at 20C and a 60-Hz resistance of 0.0956 ohm per mile at 50C for the all-aluminum Marigold conductor, which has 61 strands and whose size is 1113 kcmil. Assuming an increase in resistance of 2 for spiraling, calculate and verify the dc resistance. Then calculate the dc resistance at 50C, and determine the percentage increase due to skin effect.arrow_forward
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