EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN: 9781337516549
Author: Simmons
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Chapter 12, Problem 16R
Complete the wiring diagram, connecting feed-through GFCI 2 to also protect receptacle 1, both to be supplied by Circuit A1. Connect feed-through GFCI 3 to also protect receptacle 4, both to be supplied by Circuit A2. Use colored pencils or markers to show proper color. Assume that the wiring method is EMT, where more freedom in the choice of insulation colors is possible.
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Most residential general lighting circuits are wired with 14-AWG copper conductors and are protected by 15-amp circuit breakers. However, there are many electricians who install 12-AWG copper conductors and protect them with 20-amp circuit breakers. How will you know which conductor size and which circuit breaker size will be used for the general lighting branch circuits in the house you are wiring?
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.
Grounding Lighting Fixtures. There are specific requirements for grounding lighting fixtures. How must they be grounded and with what size conductors? Be sure and cite the code in your answers.
Chapter 12 Solutions
EBK ELECTRICAL WIRING RESIDENTIAL
Ch. 12 - If everything on Circuit B7 were turned on, what...Ch. 12 - From what panelboard does the kitchen lighting...Ch. 12 - How many luminaires are connected to the kitchen...Ch. 12 - What color fluorescent lamps are recommended for...Ch. 12 - a. What is the minimum number of 20-ampere...Ch. 12 - Prob. 6RCh. 12 - Prob. 7RCh. 12 - Duplex receptacles connected to the 20-ampere...Ch. 12 - Prob. 9RCh. 12 - A fundamental rule regarding the grounding of...
Ch. 12 - How many circuit conductors enter the box a. where...Ch. 12 - Prob. 12RCh. 12 - Where is the speed control for the range hood fan...Ch. 12 - Who is to furnish the range hood? _____Ch. 12 - Prob. 15RCh. 12 - Complete the wiring diagram, connecting...Ch. 12 - Each 20-ampere small-appliance branch-circuit load...Ch. 12 - a. The Code requires a minimum of two...Ch. 12 - According to 210.52, no point along the floor line...Ch. 12 - Prob. 21RCh. 12 - Electric fans produce a certain amount of noise....Ch. 12 - Prob. 23RCh. 12 - Prob. 24RCh. 12 - Prob. 25RCh. 12 - Prob. 26RCh. 12 - Prob. 27RCh. 12 - The following is a layout for the lighting circuit...
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- Who has the responsibility for Code interpretations? When are rules in the PEC mandatory and when are they advisory? What color-coding is required on multiwire branch circuits? What is the basis for figuring the general lighting loads in occupancies?arrow_forwardDefine cable rating in a built environmentarrow_forwarda. Does the circuit for the Master Bedroom have a grounded circuit conductor? ____________________ b. Does it have an equipment grounding conductor? ____________________ c. Explain the difference between a grounded conductor and an equipment grounding conductor. ____________________ ____________________arrow_forward
- 11. Which of the following statements about the use of structural steel as an equipment grounding conductor (EGC) in an AC system is correct? A. Structural steel can be used as an EGC when it's bonded at both ends.B. Structural steel isn't allowed for use as an EGC.C. Structural steel must have an EGC bonding jumper every three feet of structure. D. Structural steel can be used as an EGC bonding jumper between panelboards. 12. Which of the following statements about equipment grounding conductors is true? A. They increase voltages above ground potential on conductors and equipment enclosures during normal operation. B. Unacceptable equipment grounding conductors include conduit, tubing, and cable armor. C. They must be capable of withstanding the higher level of ground-fault current to perform their safety function. D. When they're far from their associated circuit conductors, impedance values are kept as low as possible during ground-fault conditions. 13. Imagine that…arrow_forwardwrite down the slection of wiring accessories used in electrical installationarrow_forwardWhat assumptions can you make regarding the following receptacle wiring? Check all that apply. White neutral wire Grounding screw Brass screw terminal Silver screw terminal Black hot wire Red hot wire Grounding wires Grounding screw terminal O device is at end-of-run device box does not need a ground connection this is a split-circuit receptacle neutral side receptacle tab must be removedarrow_forward
- 1. _______ is not considered an effective ground-fault current path. a) Ground b) Equipment grounding conductors c) Equipment bonding jumpers d) Grounded conductors 2.Which of the following is not a conductor in the grounding and bonding scheme for an ungrounded system? a) Grounding electrode conductor for grounding equipment enclosures and conductive parts b) Equipment grounding conductor c) Bonding conductors or jumper d) System grounded conductorarrow_forwardLoad in Figure 1 needs to be connected to Mains Switch Board (MSB) using multicore PVC cable. As a maintenance engineer, you need to proposed cable size for the load, Determine the following issues. 1) Calculate current demand for the circuit. 1) Detemine suitable MCCB (Model and nominal current rating) should be used to protect the load against over-current. im Propose suitable cable size for the load in Figure 1. iv) Calculate voltage drop of the proposed cable WITHOUT consider the cable reactance and voltage drop correction due to higher cable operating temperature v) Calculate voltage drop of the proposed cable BY consider the cable reactance and voltage drop correction due to higher cable operatıng temperature vi) If the multicore PVC eable is change into 3 single core PVC cables, what the suitable cable size. All other multicore cables not available. (25 + variable x) m (A) 30 m (B) (15 + variable b) m (C) Multicore PVC cable MCCB 95 kW. (400 + variable y) V. 0.85 p.f. Load MSB…arrow_forwardPlease use the per-Square-Foot Method to answer the following question: If we figure at one 15-ampere branch circuit for every 600 ft2, a 3000 ft2 house would have a minimum of how many 15-ampere general purpose lighting branch circuits? Group of answer choices A. Four 15-ampere general purpose lighting branch circuits. B. Five 15-ampere general purpose lighting branch circuits. C. Six 15-ampere general purpose lighting branch circuits. D. Seven 15-ampere general purpose lighting branch circuits.arrow_forward
- 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.arrow_forwardh.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.arrow_forwardList the basic concepts involved in house wiring?arrow_forward
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