Electrical Wiring Residential
19th Edition
ISBN: 9781337101837
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Chapter 30, Problem 12R
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Choose the correct option from the given statement for the enclosures of transformers and GFCIs and junction boxes having one thing in common.
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In the conduit layout shown in picture attached, determine how many wires are contained in each conduit between each piece of equipment. Identify each wire with a proper terminal marking, as shown in the example, above the disconnect switch.
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wiring diagram for a single pole switch controlling the top half of a duplex receptacle that when energized, is indicated by a pilot light at the single pole switch location plus an isolated ground duplex receptacle that is always hot
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- A Type NM cable carries a branch circuit to the outside of a building, where it terminates in a metal weatherproof junction box. From this box, a short length of EMT is installed upward to another metal weatherproof junction box on which is attached a cluster of outdoor floodlights. The first box is located approximately 24 in. (600 mm) above the ground. To Meet Code, do the metal boxes and metal raceway have to be grounded? Yes _______________ No _______________ NEC _______________.arrow_forward18. Which of the following would help avoid the choke effect in grounding electrode conductors?A. Installing a main bonding jumperB. Using an approved polyvinyl chloride conduitC. Applying solder to the connectionD. Using bonding bushes on the ends of the racewayarrow_forwardA homeowner wants to add 12 general-purpose receptacle outlets to the electrical drawings before the house is built, what additional load, in volt-amperes will they add to the service load calculation?arrow_forward
- When used as service equipment, a panelboard (load center) must be ______________________ that is suitable for use as service equipment, 230.66. If the panelboard (load center) contains the main service disconnect, it must be clearly marked ____________________________________, 230.70(B).arrow_forwardIt is generally understood that grounding and bonding together all metal parts of an electrical system and the metal shield of the cable television cable to the same grounding reference point in a residence will keep both systems at the same voltage level should a surge, such as lightning, occur. Therefore, if the incoming cable that has been installed by the CATV cable company installer has the metal shield grounded to a driven ground rod, does this installation conform to the NEC? ___________arrow_forwardDetermine the minimum number of cubic inches required for two 10 AWG conductors passing through a box, four 14 AWG conductors spliced in the box, two 12 AWG conductors terminating to a receptacle, and one 12 AWG equipment bonding jumper from the receptacle to the box.arrow_forward
- A residential air-conditioning unit is installed in the attic. a. Is a lighting outlet required? __________ b. What Code section applies? __________ c. If a lighting outlet is required, how shall it be controlled? __________ d. What Code section applies? __________ e. Is a receptacle outlet required? __________ f. What Code section applies? __________arrow_forwardWhich of the following is a term missing from the National Electrical Code but used by manufacturers of equipment that's suitable for use as service equipment? Micro-grid Selective coordination Neutral disconnect link Grounding triad The _______ is required to be connected to the grounded conductor of the sensitive electronic system on the line side of the separately derived system disconnecting means. main bonding jumper equipment grounding terminal bus neutral ground strap neutral disconnect linkarrow_forwardTrue False Bonding must be accomplished around conduit connections whenever the fault current return path is suspect as well as when specifically required by the NECarrow_forward
- NEC 590.6(A)(3) requires that all 125-volt and 125/250-volt, single-phase, 15-, 20-, and 30-ampere receptacle outlets used on a construction site that are a part of a portable generator have listed: (Circle the correct answer.) a. ground-fault circuit interrupter protection for personnel. b. grounding-type receptacles. c. twist-lock receptacles.arrow_forwardWhat color are the faceplates in the bathrooms? Refer to the specifications. ________________arrow_forward_______ type receptacles must be installed on all 15- and 20-ampere branch circuits except for replacement receptacles as permitted by 406.4(D). Select one: a. AFCI b. GFCI c. Duplex d. Groundingarrow_forward
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