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National Standard Residential Electrician

ICC Exam Workbook Sample Questions

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59. A 125-volt, single-phase, ____________ rated receptacle outlet must be installed at an accessible location for the servicing of heating, air-conditioning and refrigeration equipment.

A. 15 ampere
B. 20 ampere
C. 15 ampere or 20 ampere
D. any of the above



60. Service disconnects must be _______________________ as a service disconnect

A. marked by engraving or embossing
B. permanently marked
C. tagged with metal or plastic tags
D. labeled



61. Each disconnecting means must be legibly marked to indicate its purpose, _______________________________________________________.

A. except where is not subject to operation by the general public.
B. except where located and arranged so that the purpose is evident
C. except where located in sight of the equipment being disconnected.
D. none of the above.



62. Ground clamps or other fittings must be approved for applications without protection or must be protected from physical damage by installing them where they are not likely to be damaged or by enclosing them in ________________ .

A. metal
B. wood
C. equivalent protective coverings
D. none of these


63. The voltage rating of branch circuits that supply luminaries, receptacles for cord and plug connected loads of up to ___________ , or of less than _____________ must be limited to a maximum rating of 120 volts, nominal, between conductors.

A. 1,440 volt-amperes, 0.5 horsepower
B. 1000 volt-amperes, .125 horsepower
C. 2000 volt-amperes, 0.25 horsepower
D. 1,440 volt-amperes, 0.25 horsepower


64. The connection of the grounding electrode conductor or bonding jumper must be made in a manner that will ________________ and effective grounding path.

A. create an accessible connection
B. ensure an insulated connection
C. ensure a permanent
D. none of the above


65. What is the ambient temperature correction factor for Type THHW Copper 90C rated conductors, in an ambient temperature of 23C?

A. 0.41
B. 0.58
C. 0.75
D. 1.04


66. A UF cable is supplying power to a detached garage. The total maximum load in the garage is 4500 Watts. What would be the minimum conductor size for copper conductors that could be used if the supply voltage to be supplied is for a three wire 240V panel?

A. AWG 14
B. AWG 12
C. AWG 10
D. AWG 8


67. When calculating the required service size, the minimum total load in amperes is the volt-ampere sum divided by __________ volts.

A. 120
B. 208
C. 240
D. 277


68. On overhead service installations, the point of attachment of the service drop conductors to a building or other structure must in no case be less than ____ feet above finished grade.

A. 8
B. 10
C. 12
D. 14


69. A ________ AWG grounding conductor that is free from exposure to physical damage will be permitted to be run along the surface of the building construction without metal covering or protection where it is and securely fastened to the construction.

A. 2
B. 4
C. 6
D. 8


70. What is the maximum number of No. 10 AWG conductors allowed in a 4 in. round trade size metal box that is 2-1/8 inches deep?

A. 5 cubic inches
B. 7 cubic inches
C. 8 cubic inches
D. 10 cubic inches



71. While doing a feeder load calculation for a heat pump, you see that the nameplate rating on the heat pump is 3200 VA. Which value will you use in your calculations?

A. 3200 VA
B. 3520 VA
C. 5000 VA
D. 7320 VA



72. This wiring method requires a maximum support distance from box or other terminations of 36 inches.

A. EMT
B. RNC
C. NM
D. A and B
E. all of the above



73. What is the minimum burial depth in inches for rigid metal conduit or intermediate metal conduit in underground wiring in a trench below 2-inch-thick concrete or equivalent?

A. 4 Inches
B. 6 Inches
C. 12 Inches
D. 18 Inches



74. What is the minimum service load per square foot of floor area for general lighting and convenience receptacle outlets required in a dwelling?

A. 1 volt-amperes
B. 3 volt-amperes
C. 6 volt-amperes
D. 10 volt-amperes


75. Where direct buried conductors, raceways, or cables are ____________________________, direct buried conductors, raceways, or cables must be arranged to _______________ to the enclosed conductors or to equipment connected to the raceways.

A. enclosed in rigid metal raceways, reduce the difficulty of placing future conductors
B. connected to high voltage transformers, reduce the difficulty of placing future conductors
C. contained in number greater than three, reduce confusion in identifying damage
D. subject to movement by settlement or frost, prevent damage



76. Where a portion of the basement is finished into one or more habitable rooms, each _______________________ must have a receptacle outlet installed in accordance with the code.

A. bedroom
B. bathroom
C. separate unfinished portion
D. laundry room
E. All of these



77. A grounding connection must not be made to any ________________________ on the load side of the service disconnecting means. Exceptions ignored.

A. neutral wire conductor
B. grounding conduit
C. grounded circuit conductor
D. none of the above







78. Where exposed to the weather, raceways enclosing service entrance conductors must be _________ and arranged to drain.

A. listed or approved use in wet locations
B. suitable for use in wet locations
C. waterproof
D. rainproof



79. A No. 18 AWG type SOO flexible cord has what maximum ampere load rating if there are two current carrying conductors in the cord.

A. 10 amperes
B. 15 amperes
C. 20 amperes
D. 25 amperes



80. Hallways of __________ or more in length must have at least one receptacle outlet.

A. 6 feet
B. 8 feet
C. 10 feet
D. 12 feet



81. General use and motor circuit switches and circuit breakers must clearly indicate whether they are in the open ___ or closed ____ position.

A. ON, OFF
B. OFF, ON







82. A 30-ampere branch circuit is permitted to supply fixed utilization equipment. The rating of any one cord and plug connected utilization equipment must not exceed _______________ of the branch-circuit ampere rating.

A. 50 percent
B. 80 percent
C. 100 percent
D. 125 percent


83. Which of the following are not required having GFI protected 125-volt, single-phase, 15 and 20 amp circuits?

A. outdoor receptacles
B. bathroom receptacles
C. bedroom receptacles
D. none of the above


84. Ungrounded service conductors for one family dwelling must have an ampacity of not less than the load served and the rating of the ungrounded conductors must be not less than _______ amperes, 3 wires. For all other installations, the rating of the ungrounded conductors must be not less than _______ amperes.

A. 100, 60
B. 60, 100
C. 60, 60
D. 100, 100


85. Which of the following is an allowable wiring method for wet niche and no niche luminaries from deck or junction box to the forming shell?

A. EMT
B. RMC
C. UF
D. MC


86. Electric equipment must be firmly secured to the surface on which it is mounted, wooden plugs driven into masonry, concrete, plaster, or similar materials ___________________.

A. may be used to provide and insulated anchor
B. may be used wherever possible.
C. may not be used
D. none of the above



87. Bathtub and shower space. A receptacle may not be installed within or directly over a bathtub or shower stall unless ____________________.

A. It is double insulated and GFI protected
B. it is grounded, bonded, insulated and double GFI protected
C. it is grounded, bonded, insulated and double GFI protected, AFI protected and Child Proof
D. None of the above.



88. Where practicable, rod, pipe and plate grounding electrodes must be embedded below _______________.

A. the meter housing
B. finished grade
C. frost level
D. permanent moisture level



89. A small appliance branch circuit must not serve more than _______________.

A. one room
B. two rooms
C. one kitchen
D. two kitchens



90. A metal underground gas piping system being used as a grounding electrode _________________.

A. must be a minimum of 48 inches below grade
B. must be a minimum of 1 inch trade size black pipe and uncoated
C. is not allowed
D. none of the above



91. Which of the following is not listed as and allowable wiring method in a one or two family dwelling?

A. NM
B. EMT
C. SE
D. FMC
E. none of the above



92. The minimum size of conductors for feeders and branch circuits used in dwellings must be _______ AWG copper and _______ AWG aluminum.

A. 14, 14
B. 14, 16
C. 14, 12
D. 12, 12



93. A grounded conductor may not be connected to normally noncurrent-carrying metal parts of equipment, to equipment grounding conductor's), or be reconnected to ground _____________ of the service disconnecting means.

A. on the line side
B. on the load side
C. on the neutral side
D. electrode



94. Combustible wall or ceiling finish exposed between the edge of a fixture canopy or pan and the outlet box must be ______________________________.

A. caulked
B. covered with noncombustible material
C. coated with cement
D. grounded


95. What is the maximum number of No. 14 AWG, Type TW conductors allowed in FMC 1/2 inch trade size?

A. 4 conductors
B. 6 conductors
C. 9 conductors
D. 12 conductors


96. In the kitchen, pantry, breakfast room, dining room, or similar area of a dwelling unit, the __________ or more 20-ampere small-appliance branch circuits must serve all receptacle outlets and those receptacle outlets provided for refrigeration appliances.

A. one
B. two
C. three
D. four



97. What is the minimum burial depth in inches for nonmetallic raceways listed for direct burial without concrete encasement or other approved raceways in underground wiring under a minimum of 4-inch thick concrete exterior slab with no vehicular traffic and the slab extending not less than 6 inches beyond the underground installation?

A. 4 Inches
B. 6 Inches
C. 12 Inches
D. 18 Inches


98. How many services may a two-family dwelling unit be supplied by?

A. one
B. two


99. Raceways may be used as a means of support for other raceways, cables or nonelectric equipment only under the all but which of the following conditions. Where the raceway is used to support boxes or conduit bodies in accordance with Sections E3806.8.4 and E3806.8.5.

A. Where the raceway or means of support is identified for the purpose
B. Where the weight of the equipment is less than 10 lbs.
C. Where the raceway contains power supply conductors for electrically controlled equipment and is used to support Class 2 circuit conductors or cables that are solely for the purpose of connection to the control circuits of the equipment served by such raceway
D. Where the raceway is used to support boxes or conduit bodies in accordance with Sections E3806.8.4 and E3806.8.5.



100. A box or ________________ must be installed at each conductor splice point, outlet, switch point, junction point and pull point. Exceptions ignored.

A. conduit body
B. conduit
C. mechanical connection device
D. Y-fitting
E. any of the above


101. Overcurrent devices must not be connected in series with a grounded service conductor except where a circuit breaker is used that ________________________ of the circuit.

A. protects the circuit referred to
B. does not open the grounded conductor
C. simultaneously opens all conductors
D. none of the above


102. On overhead service installations, where a roof has a slope of ____ inches in 12 inches, or greater, the minimum clearance for overhead service conductors is ____ feet.

A. 6, 3
B. 12, 8
C. 6, 3
D. 4, 3



103. A ______________ branch circuit must be permitted to supply lighting units, or other utilization equipment, or a combination of both.

A. 15 ampere
B. 20 ampere
C. 15 ampere or 20 ampere
D. all of the above



104. Nonconductive coatings on equipment to be grounded must be removed from threads and other contact surfaces to ________________________________ or must be connected by fittings that make such removal unnecessary.

A. ensure good electrical continuity
B. make assembly easier
C. ensure good electrical resistance for grounding
D. none of the above



105. Connection to terminals for conductor sizes of ________ AWG and smaller, may be made by means of wire binding screws or studs and nuts having upturned lugs or the equivalent.

A. 6
B. 8
C. 10
D. 12

106. Outlet boxes that do not enclose devices or utilization equipment must have an internal depth of not less than _____________ .

A. 0.5 inches
B. 1.0 inch
C. 1.125 inches
D. 1.5 inches



107. On overhead service installations, open conductors and multiconductor cables without an overall outer jacket must have a clearance of not less than _____ feet from the sides of doors, porches, decks, stairs, ladders, fire escapes, and balconies, and from the sides and bottom of windows that open.

A. 3
B. 5
C. 8
D. 10


108. All branch circuits that supply 120-volt, single-phase, _______________ outlets installed in family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreations rooms, closets, hallways and similar rooms or areas must be protected by a combination type arc-fault circuit interrupter installed to provide protection of the branch circuit. Exceptions ignored.

A. 15, 20 and 30-ampere
B. 15-ampere
C. 15- and 20-ampere
D. 20-ampere



109. What is the maximum number of No. 14 AWG conductors allowed in a 3 X 2 x 2 device metal box?

A. 5 conductors
B. 9 conductors
C. 12 conductors
D. 14 conductors

110. ____________________ boxes must be used only with cabled wiring methods with entirely nonmetallic sheaths, flexible cords and nonmetallic raceways. Exceptions ignored.

A. Metallic
B. Galvanized
C. Steel
D. Nonmetallic


111. Insulated grounded conductors of sizes ____ AWG or smaller must be identified by a continuous white or gray outer finish or by three continuous white or gray stripes on other than green insulation along the entire length of the conductors.

A. 1
B. 3
C. 6
D. 10


112. Recessed incandescent luminaries do not require thermal protection if they are listed for the purpose and installed in poured concrete.

A. This is True
B. This is False




113. Receptacle outlets rendered not readily accessible by appliances fastened in place, appliance garages or appliances occupying dedicated space _______________________ as these required outlets. Exception ignored.

A. may be considered
B. will be considered
C. will not be considered
D. must be considered




114. A unit load of not less than ____ shall constitute the minimum lighting and convenience receptacle load for each square foot of floor area.

A. 3 volt-amperes
B. 6 volt-amperes
C. 9 volt-amperes
D. 12 volt-amperes


115. Receptacles that provide power for water-pump motors or other loads directly related to the circulation and sanitation the system must be of the grounding type, located not less than ____________ from the inside walls of pools and outdoor spas and hot tubs and GFI protected.

A. 5
B. 6 feet
C. 20
D. 25


116. All conductors of a circuit, including _______________________________________________, must be contained in the same raceway, trench, cable or cord.

A. equipment grounding conductors
B. bonding conductors
C. control circuit conductors
D. A & B
E. All of the above



117. The connection made between the one or more equipment grounding conductors and a metal box by means of a grounding screw that must be used for no other purpose, or by ______________________.

A. means of a sheet metal screw
B. means of a solder connection
C. no connection is required
D. means of a listed grounding device


118. Where one or more equipment grounding conductors or equipment bonding jumpers enters a box, a __________ allowance in accordance with the appropriate table must be made based on the largest equipment grounding conductor or equipment bonding jumper present in the box.

A. zero volume
B. single volume
C. double volume
D. triple volume


119. On overhead service installations, conductors that pass over or near roofs must have a vertical clearance of not less than _________ feet above the roof surface. The vertical clearance above the roof level must be maintained for a distance of not less than ________ feet in all directions from the edge of the roof. Exceptions ignored.

A. 3, 8
B. 8, 3
C. 10, 4
D. 4, 10


120. Where fuses are used as the service overcurrent device, the disconnecting means shall be located on the ___________ of the fuses.

A. load side
B. supply side
C. within the same panel as that
D. in parallel with the load


121. What is the lighting load calculated for a 6500 sq ft single family home? Consider the demand factor.

A. 19,500 VA
B. 12,750 VA
C. 10,225 VA
D. 8775 VA


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