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242 True/False questions

  1. (240) Overcurrent protection devices are not permitted to be located where exposed to physical damage; near easily ignitable materials, such as clothes closets; in bathrooms of dwelling units.(True/False)False

          

  2. (210)In dwelling units, when determining the spacing of general use receptacles, ____ on exterior walls are not considered wall space.Sliding panels

          

  3. When determining the number of conductors in a box fill two No. 18 fixture wires, one 14/3 nonmetallic sheathed cable with ground, one duplex switch, and two cable clamps would count as ______ conductors.22 cubic inches

          

  4. (230) When ground-fault protection is provided for the ____ disconnecting means and interconnection is made with another supply system by a transfer device, means or devices may be needed to ensure proper ground-fault sensing by the ground-fault protection equipment.Fuse

          

  5. The necessary equipment, usually a circuit breaker or switch and fuse and their accessories, intended to constitute the main control and cutoff of the supply is referred to as _____.Service equipment

          

  6. (210)The total rating of utilization equipment fastened in place shall not exceed _____ percent of the branch circuit ampere rating, where the circuit supplies receptacles for cord-and-plug connected equipment.50

          

  7. (250) Currents that introduce noise or data errors in electronic equipment shall be considered objectionable currents.(True/False)True

          

  8. (250) What size copper grounding electrode conductor is required for a service that has three sets of 500 Kcmil copper per phase?True

          

  9. How many No. 1/0 XHHW can be installed in 2" flexible metal conduit?.0243

          

  10. Box Fill Requirements: One or more fixture studs or hickeys within the box are considered as ____ conductors based on the _____ conductor that enters the box.1, largest

          

  11. (225) Outside branch circuits and feeder conductors shall have a vertical clearance of _____ feet from the surface of a roof.Beneath

          

  12. What size square box is required for 6 No. 14 THHN and 3 No. 14 THW?1 ½ inch

          

  13. Spare Space Area: An existing one inch liquidtight flexible metal conduit contains two No. 12 THW conductors, two No. 10 THW conductors, and one No. 12 bare (stranded). What is the area remaining for additional conductors?7

          

  14. A single panel or group of panel units designed for assembly in the form of a single panel is called a _______panelboard

          

  15. A junction box contains two 2 inch raceways on the left side and two 2 inch raceways on the top. What is the distance between the 2 inch raceways that contain the same conductors?24 inches

          

  16. Equipment enclosed in a case or cabinet that is provided with a means of sealing or locking so that live parts cannot be made accessible without opening the enclosure is said to be _______.Sealable

          

  17. Raceway and Nipple Calculations: Tables are not useful to determine raceway sizing if conductors are of different sizes. What are the three steps for determining raceway and nipple size.Step 1) cross sectional area of each conductor. Step 2) Cross sectional area for all conductors. Step 3) Size the raceway according to percent fill.

          

  18. How many No. 14 THHN conductors can be pulled through a 4 x 1 ½ square box with a plaster ring of 3.6 cubic inches? The box contains two duplex receptacles, five No. 14 THHN and two grounding conductors.2

          

  19. If a 250kcmil wire is run through a 3 inch raceway entry in the wall opposite to a removable cover, the distance from that cover must not be less than _______.4 ½ inches

          

  20. How many #12 RHH (with outer cover) can be installed in 1" IMC raceway?11

          

  21. Box Fill Requirements: Fixture wires smaller than NO. 14 from a domed fixture or similar canopy are considered as ______ conductor0

          

  22. (Article 100) Acceptable to the authority having jurisdiction means that the equipment has been _____.Approved

          

  23. Equipment approved for use in dry locations shall be protected against permanent damage from the weather during _____.Building construction

          

  24. A junction box contains two 2 ½ inch raceways on the left side and one 2 ½ inch raceway on the right side. The conductors from one 2 ½ inch raceway are pulled through the raceway on the righ wall. The other 2 ½ inch raceway conductors (on the side) are pulled through a 2 ½ inch raceway at the bottom of the pull box. What is the distance from the bottom wall to the top wall?18

          

  25. Conductors larger than No. 4/0 are measured in _____.Circular mils

          

  26. Determine the minimum cubic inches required for two No. 10 TW passing through a box, four No. 14 THHN terminating, two No. 12 TW terminating to a receptacle, and one No. 12 equipment bonding jumper from the receptacle to the box.True

          

  27. For a circuit to be considered a multiwire branch circuit, it must have two or more ungrounded conductors with a potential difference between them, a grounded conductor having equal potential difference between it and each ungrounded conductor of the circuit, and a grounded conductor connected to the neutral (grounded) conductor of the system.(True/False)True

          

  28. A junction box contains two 2 ½ inch raceways on the left side and one 2 ½ inch raceway on the right side. The conductors from one 2 ½ inch raceway are pulled through the raceway on the righ wall. The other 2 ½ inch raceway conductors (on the side) are pulled through a 2 ½ inch raceway at the bottom of the pull box. What is the distance from the left wall to the right wall?14 inches

          

  29. (Article 90)Installations of communications equipment under the exclusive control of communications utilities located outdoors or in building spaces used exclusively for such installations ______ covered by the Code.Are not

          

  30. An outlet intended for the direct connection of a lampholder, a lighting fixture, or a pendant cord terminating in a lampholder is a(n) _____.Lighting outlet

          

  31. U-Pull Calculations: The distance from were the raceways enter to the opposite wall must not be less than _____ times the trade diameter of the largest raceway plus the sum of te diameters of the remaining raceways on the same wall.6

          

  32. A system intended to provide protection of equipment from damaging line-to-ground-fault currents by operating to cause a disconnecting means to open all ungrounded conductors of the faulted circuit is defined as _____.Are not

          

  33. (250) Supplementary grounding electrocces can supplement the equipment grounding conductor, but they cannot be used as the sole equipment grounding conductor.(True/False)True

          

  34. (Article 90) Plans and specification that provide ample space in raceways, spare raceways, and additional spaces will allow for future increases in the use of electricity. Distribution centers located in readily accessible locations will provide convenience and safety of operation. (True/False)True

          

  35. An apparatus enclosed in a case that is capable of withstanding an explosion of specified gas or vapor that may occur within it, and of preventing the ignition of a specified gas or vapor surrounding the enclosure by sparks, flashes, or explosion of the gas or vapor within, and that operates at such an external temperature that a surrounding flammable atmosphere will not be ignited is defined as _____.Explosion-proof

          

  36. (220) The demand factors listed in Table 220-42 shall not be applied in determining the number of _____ for general illumination.Branch circuits

          

  37. (250) A grounding electrode is required if a building or structure is supplied y a feeder, or by more than one branch circuit.(true/False)Service

          

  38. How many NO. 6 RHH (without outer cover) can be installed in a 1 " nonmetallic tubing?8

          

  39. (210)Each system _____ conductor, wherever accessible, shall be identified by a separate color coding, marking tape, tagging, or other equally effective means. This applies to multiwire branch circuits when there Is more than one system voltage in a building.Ungrounded

          

  40. A junction box contains two 2 inch raceways on the left side and two 2 inch raceways on the top. What is the distance from the left to the right wall?15 inches

          

  41. Raceway Size: A 400 amp feeder is installed in schedule 40 rigid nonmetallic conduit. This raceway contains three 500 kcmil THHN conductors, one 250 THHN conductor and one No. 3 THHN conductor. What size raceway is required for these three conductors?3 inch

          

  42. (210)At least _____ wall switch-controlled lighting outlet(s) shall be installed in every dwelling unit habitable room and bathroom.One

          

  43. It is permitted to omit one equipment grounding conductor and not more than ______ that enter a box from a fixture canopy.4

          

  44. What is the area in square inches for a No. 12 RHH (with outer cover)?.013

          

  45. A 200 ampere feeder installed in rigid nonmetallic conduit schedule 80, has three No. 3/0 THHN, one No. 2 THHN, and one No. 6 THHN. What size raceway is required?True

          

  46. What size square outlet box is required for: one 12/2 NM cable that terminates on a switch, one 12/3 NM cable that terminates on a receptacle, and the box has manufactured cable clamps.4 x 1 ¼

          

  47. Pull Box Sizing, Horizontal Dimension: A pull box contains two 4 inch raceways on the left and two 2 inch raceways on the top. What is the horizontal dimension of the box?18

          

  48. (230) Circuits used only for the operation of fire alarm, other protective signaling systems, or the supply to fire pump equipment shall be permitted to be connected on the _____ of the service overcurrent protection device where separately provided with overcurrent protection.Fuse

          

  49. What size rigid metal nipple is required for three No. 4/0 THHN, one No. 1/0 THHN and one No. 4 THHN?1 ½ inch

          

  50. (230) To supply power to a single-phase water heater, the size of the underground service lateral conductors shall not be smaller than _____.No. 10 aluminum

          

  51. What is the cross-sectional area for one No. 10 RHH without an outer cover?.0243

          

  52. (Article 90)Explanatory material, such as references to other standards, references to related Sections of the Code or information related to a Code rule is included in the NEC in the form of informational notes. (True/False).013

          

  53. When conductors enter an eclosure opposite a removable cover, the distance from where the conductors enter to the removable cover determined using Table _____ (1 terminal column)8

          

  54. (210)A single receptacle installed on an individual branch circuit must be rated at least _____ percent of the rating of the circuit.True

          

  55. (240) Cartridge fuses and fuseholders shall be classified according to _____ranges.Voltage and amperage

          

  56. (230) In a multiple-occupancy building, each occupant shall have access to its own service_____.Disconnecting means

          

  57. Ventilated heating or cooling equipment (including ducts) that service the electrical room or space cannot be installed in the dedicated space above a panelboard or switchboard. (True/False)50

          

  58. Three or more conductors can take up to ____% of the cross-sectional area of a raceway.40%

          

  59. (220) The maximum unbalanced feeder load for household electric dryers shall be calculated at ____ percent of the demad load as determined by Table 220-54.70

          

  60. (210)A permanently installed cord connector on a cord pendant shall be considered a receptacle outlet.(True/False)True

          

  61. One conductor can take upt o _____% of the cross sectional area of a raceway53%

          

  62. Box Fill Requirements: Wirenuts, cable connectors, raceway fittings and conductors that originate and terminate within the outlet box (such as equipment bonding jumpers and pigtails) are considered _____ conductor .0

          

  63. Nipple Size: What size rigid metal nipple is required for three NO. 3/0 THHN conductors, one No. 1 THHN conductor, and one No. 6 THHN conductor?1 ½ inch

          

  64. If we have a 2 inch rigid metal conduit and we want to install three THHN aluminum compact conductors, what is the largest aluminum compact conductor permitted to be installed?300kcmil

          

  65. (210)A branch circuit rated 20 amps serves four receptacles. The rating of the receptacles must not be less than _____ amperes.Ground-fault circuit interrupter protection

          

  66. A qualifying term indicating that there is a purposely introduced delay in the tripping action of the circuit breaker, which delay decreases as the magnitude of the current increases, is defined by the Code as a _____ circuit breaker.Inverse time

          

  67. The NEC required series-related installations to be field-marked to indicate the maximum level of fault-current for which the system has been installed.0

          

  68. (230) Branch circuit and feeder conductors shall not be installed in the same raceway or cable with service conductors.(True/False)True

          

  69. (240) Plug fuses of 15 amperes and lower ratings shall be identified by a _____ configuration of the window, cap, or other prominent part to distinguish them from fuses of higher ampere ratings.Beneath

          

  70. A system or circuit conductor that is intentionally grounded is a(n)_____ This conductor is often called a neutral conductor in the field, and is identified with the color white or gray.Grounded conductor

          

  71. (210)All 125 volt, single phase 15 and 20 ampere receptacles installed in bathrooms of guest rooms in hotels/motels, dwelling units, and office buildings shall have ____________for personel.15

          

  72. Box Fill Requirements: Each yoke or strap containing one or more devices or equipment is considered as ____ conductors, based on the ______ conductor that terminates on the yoke.1, largest

          

  73. The temperature rating associated with the ampacity of a _____ shall be so selected and coordinated so as to not exceed the lowest temperature rating of any connected termination, conductor, or device.Conductor

          

  74. Pull Box Sizing, Distance between Raceways: A junction box contains two 3 inch raceways on the left side and one 3 inch raceway on the right side. The conductors from one of the 3 inch raceways on the left are pulled through the 3 inch raceway on the right wall. The other 3 inch raceways conductors are pulled through ta raceway at the bottom of the pull box. What is the minimum distance between the two three inch raceways that contain the same conductors (314-28a-2)?18

          

  75. (240) Unless specifically permitted in 240-3(e) through 240-3(g), the overcurrent protection shall not exceed 15 amperes for No. 14 copper; 20 amperes for No. 12 copper; and 30 amperes for No. 10 copper.(True/False)Secondary

          

  76. Depth of Pull or Junction Box: A 24" x 24" pull box has two 2 inch conduits that enter the back of the box with No. 4/0 conductors. What is the minimum depth of the box?Accessible

          

  77. (230) Where the service overcurrent devices are locked or sealed, or not readily accessible to the _____, the branch circuit overcurrent devices shall be located in a readily accessible location.Occupant

          

  78. Can a round 4 x ½ box marked as 8 cubic inches with manufactured cable clamps supplied with 14/2 NM be used with a fixture that has two No. 18 TFN and a canopy cover?Yes

          

  79. Box Fill Requirements: Each conductor that originates outside the box and terminates or is spliced within the box is considered as ____ conductor.0

          

  80. (250) _____on equipment to be grounded shall be removed from contact surfaces to ensure good electrical continuity.Secondary

          

  81. ____ branch circuits supply energy to one or more outlets to which appliances are to be connected.Annex C

          

  82. When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be suitably _____.Grounded.

          

  83. Box Fill Requirements: One or more internal cable clamps are considered as _____ conductors based on the ____ conductor that enters the box1, largest

          

  84. (240) Breakers and fuses can be used in parallel when factory assembled in parallel or listed as a unit.(True/False)True

          

  85. (225) If festoon lighting exceeds a span of ____ feet, messenger wires shall support the conductors.40

          

  86. (Article 100) According to the Code, automatic is self-acting, operating by its own mechanism when actuated by some impersonal influence such as change in current strength, mechanical configuration, temperature. (True/False)True

          

  87. (220) The feeder demand load for four 6 kw cooktops is _____ kW.12

          

  88. A 3 inch schedule 40 PVC raceway contains seven No. 1 RHW conductors without outer cover. How many No. 2 THW conductors may be installed in this raceway with the existing conductors?.0353 sq. inch

          

  89. Two conductors can take up to _____% of the cross sectional area of a racewayDevices, cable clamps, fixture studs or hickeys.

          

  90. (230) Service heads for service raceways shall be ______.Listed for use in wet locations

          

  91. Identification of the grounded conductor terminal on a device shall be by a metal or metal coating substantially white in color or the word ______ located adjacent to the identified terminal.White

          

  92. How many compact No. 6 XHHW conductors can be installed in a 1 ¼ inch nonmetallic tubing?No. 1/0

          

  93. (225) Overhead branch circuit and feeder conductors shall not be installed _____ openings through which materials may be moved, such as openings in farm and commercial buildings, and hall not be installed where they will obstruct entrance to these building openings.Beneath

          

  94. How many 4/0 RHH conductors (without outer cover) can be installed in 2 inch intermediate metal conduit?3

          

  95. Chapter 9, Table ____ can be used when calculating the cross-sectional area of bare conductors..013

          

  96. Article 200 contains the requirements for the identification of terminals, grounded conductors in premises wiring systems, identification of grounded conductors. (True/False)True

          

  97. (240) Markings on circuit breakers required by the Code shall be permitted to be made visible by removal of a _____ or cover.Raising of ladders

          

  98. (230) Service conductors shall be connected to the disconnecting means by pressure connectors, clamps, or other approved means(True/False)True

          

  99. (230) Each ______ service conductor shall have overload protection.Ungrounded

          

  100. Nipple: One or more conductors can take upt o _____% of the cross sectional area of a nipple.60%

          

  101. (210)Indwelling units, outdoor receptacles can be connected to the 20 ampere small appliance branch circuit.(True/False)False

          

  102. Annex C does not have a table for liquid tight flexible nonmetallic conduit of the _____ typeTwo

          

  103. (250) An additional electrode shall suppleent a metal underground water pipe. Where the supplemental electrode is a made electrode as in Section 250-83(c) or (d), that portion of the bonding jumper that is the sole connections to the supplemental grounding electrode shall not be required to be larger than _____ wire.One

          

  104. Chapter 9, Table ____ can be used when calculating the cross-sectional area of insulated conductors.013

          

  105. (210)In a dwelling unit, every habitable room, including hallways and stairways and bathrooms shall have a switch-controlled lighting outlet.(True/False)True

          

  106. Straight Pull Calculation (length of raceway): The minimum distance from where the raceway enters to the opposite wall must not be less than _____ times the trade size of the largest raceway.60%

          

  107. Existing Raceway Calculations: What are the three steps to determine raceway cross-sectional spare space area?Controller

          

  108. (230) Service-lateral conductors are required to be insulated (except the grounded conductor) when it is _______.Glass or porcelain

          

  109. A two-family dwelling unit, such as a duplex apartment, is considered a single family dwelling. (True/False)False

          

  110. (240) Fuseholders for cartridge fuses shall be so esigned that it is difficult to put a fuse of any given class into a fuseholder that is designed for a _____lower, or _____ higher, than that of the class to which the fuse belongs.Current, voltage

          

  111. (230) Service entrance conductors can be spliced or tapped by clamped or bolted connections at any time as long as the free ends of conductors are covered with an insulation that is equivalent to that of the conductors or with an insulating device identified for the purpose (Sections 110-14); wire connectors or other splicing means installed on conductors that are buried in the earth shall be listed for direct burial [section 300-5e]; or No splice is made in the raceway [Section 300-13](True/False)No. 1/0

          

  112. Design B, C, D, or E motors shall be wired with conductors having an insulation rating of at least _____ degrees C, and the conductor shall be sized based on the 75 degree C ampacity as listed in Table 310-15(B)(16) (formerly 310-16)75 degrees C

          

  113. (210)Receptacles installed behind a bed in the guest rooms in hotels and motels shall be located so as to prevent the bed from contacting an attachment plug, or the receptacle shall be provided with a suitable guard.(True/False)No. 18 and larger

          

  114. When all conductors are the same size, Table _______ can be used to determine the number of conductors permitted in the outlet box, or determine the size outlet box required for the given number of conductors312.6(A)

          

  115. Conductors Added to Existing Box: How many No. 14 THHN conductors can be pulled through a 4 x 2 ½ square box that has a plaster ring 3.6 cubic inches? The box already contains two receptacles, five No. 12 THHN conductors, and one No. 12 bare grounding conductor..0353 sq. inch

          

  116. (230) Service heads must be located _____.Above the point of attachment

          

  117. Circuit protective devices are used to clear a fault without the occurrence of extensive damage to te electrical components of the circuit. This fault shall be assumed to be either between two or more of the _____ or between any circuit conductor and the grounding conductor or enclosing metal raceway.Circuit conductors

          

  118. (210)A dedicated 20-ampere circuit is permitted to supply power to a dwelling unit bathroom for receptacle outlet(s) and other equipment within the same bathroom.(True/False)True

          

  119. How many #10 THHN are permitted in a 4 x 1 ½ square box?2

          

  120. (230) Where individual open conductors are not exposed to the weather, the conductors shall be mounted on _____knobs.Vertical

          

  121. What is the alternating current resistance of No. 1/0 copper installed in a metal conduit? Conductor length 1000 feet..0353 sq. inch

          

  122. Number of Conductors in an Outlet Box: Using Table 314-16a, how many No. 14 THHN conductors are permitted in a 4 x 1 ½ round box?1 ½ inch

          

  123. A _____ switch is a manually operated device used in conjunction with a transfer switch to provide a means of directly connecting load conductors to a power source and of disconnecting the transfer switch.Bypass isolation

          

  124. Equipment intended to break current at other than fault levels shall have an interrupting rating at system voltage sufficient for the current that must be interrupted.(True/False)Sealable

          

  125. Pull Box Sizing, Horizontal Dimension: A junction box contains two 3 inch raceways on the left side and one 3 inch raceway on the right side. The conductors from one of the 3 inch raceways on the left are pulled through the 3 inch raceway on the right wall. The other 3 inch raceways conductors are pulled through ta raceway at the bottom of the pull box. What is the horizontal dimension of this box?24

          

  126. (230) The requirement for maintaining a 3 foot vertical clearance from the edge of the oof shall not apply to the final conductor span where the service drop is attached to ______.The side of a building

          

  127. (230) The service disconnecting means shall plainly indicate whether it is in the _______ position.Open or closed

          

  128. (220) For each farm building or load supplied by _____ or more branch circuits, the load for feeders, service-entrance conductors, and service equipment shall be computed in accordance with demand factors not less than indicated in Table 220-102.True

          

  129. (220) The connected load to which the demand factors of Table 220-84 apply shall include 3 volt-amperes per _____ for general lighting and general-use receptacles.Square foot

          

  130. (230) A building or structure shall be supplied by a maximum of _____ services.neutral

          

  131. (250) Conductive materials enclosing electrical conductors or equipment are grounded to limit the voltage to ground and are bonded to facilitate the operation of overcurrent protection devices under ground-fault conditions.(True/False)Copper-clad aluminum with individual insulation

          

  132. (225) Where buildings exceed three stories, overhead lines shall be arranged so that a clear space at least 6 feet wide will be left either adjacent to the buildings or beginning not over 8 feet from them to facilitate the _____ when necessary for fire fighting.Raising of ladders

          

  133. (215)The feeder conductor ampacity shall not be less than that of the service-entrance conductors where the feeder conductors carry the total load supplied by service-entrance conductors with an ampacity of ____ amperes or less.10

          

  134. (210)At least one lighting outlet controlled by a wall switch, or containing a switch, located at the point of entry to the attic, under floor space, utility room, and basement shall be installed where these spaces are used for storage or contain equipment requiring servicing.(True/False)True

          

  135. (240) Fuseholders of the Edison-base type shall be installed only where they are made to accept _____ fuses by the use of adapters.Current, voltage

          

  136. (240) A current transformer and overcurrent relay shall be considered equivalent to an overcurrent trip unit(True/False)True

          

  137. The number of conductors permitted in a raceway is dependent on _____(3 things)8

          

  138. A thermal protector may consist of one or more heat-sensing element integral with the motor or motor-compressor and an external control device.(True/False)True

          

  139. (Article 100) A junction box above a suspended ceiling that has removable panels is considered to be _______.Accessible

          

  140. Warning signs for over 600 volts shall read "Warning - High Voltage - Keep Out". (True/False)False

          

  141. At least one entrance not less than 24 inches wide and 6 ½ feet high shall be provided to give access to the working space about electrical equipment that operates at over 600 volts, nominal. On switchboard and control panels exceeding 6 feet in width, there shall be one entrance at each end of such equipment, except where the work space required in Section 110.34(a) is doubled (True/False)Conductor

          

  142. A junction box contains two 2 inch raceways on the left side and two 2 inch raceways on the top. What is the distance from the bottom to the top wall?24 inches

          

  143. Cable treated as 1 conductor can take up to _____% of the cross sectional area of a raceway.3

          

  144. A separate portion of a conduit or tubing system that provides access through a removable cover(s) to the interior of the system at a junction of two or more sections of the system or at a terminal point of the system is defined as a(n)Conduit body

          

  145. (250) The grounding electrode conductor shall be made of copper, aluminum, or copper-clad aluminum.(True/False)True

          

  146. (230) Underground Service-entrance conductors are required to be insulated except when they are bare copper installed in a raceway, or bare copper and part of the cable assembly identified for underground use.(True/False)Copper-clad aluminum with individual insulation

          

  147. The cross sectional areas of conduit and tubing can be found in Table _____ of Chapter 9.4

          

  148. (225) Communications conductors shall be mounted not less than ____ inches below power conductors rated over 300 volts supported on poles.30

          

  149. (250) When a building has two or more elecrodes for different services, the separate electrodes must be ______. This shall be considered as a single electrode in this sense.Raising of ladders

          

  150. Pull Box Sizing, Vertical Dimension: A pull box contains two 4 inch raceways on the left and two 2 inch raceways on the top. What is the vertical dimension of the box?28 inches

          

  151. (230) Where the service disconnecting means is mounted on a switchboard having exposed busbars on the back, a raceway shall be permitted to terminate with a _____.Open or closed

          

  152. Conductors in Spare Space Area: An existing 1 inch EMT contains two No. 12 THHN conductors, two No. 10 THHN conductors, and one No. 12 bare stranded conductors. How many additional No. 8 THHN conductors can be added to this raceway?7 if raceway is more than 24 inches long, 12 if raceway is 24 inches long or less.

          

  153. (230) Overhead service conductors to a building shall maintain a vertical clearance of 10 feet above platforms, projections, or surfaces from which they might be reached. This vertical clearance shall extend _____ feet measured horizontally from the platform, projections, or surfaces from which they might be reached.3

          

  154. (210)The recommended maximum total voltage drop on both the feeders and banch circuits is _____ percent.5

          

  155. (250) Where service-entrance conductors are installed in parallel, the grounded conductor in each raceway can be sized, based on the size of the ungrounded service-entrance (phase) conductor in the raceway, but not smaller than _____.Ungrounded

          

  156. (210)For a one-family dwelling at least one receptacle outlet is required in each basement, attached garage, or detached garage with electric power.(True/False)False

          

  157. (220) When sizing a feeder, the appliance loads in dwelling units can apply a demand factor of 75 percent of nameplate ratings for ____ or more appliances fastened in place on the same feeder.No. 1/0

          

  158. Angle Pull Calculation (90 degrees, diameter of raceway) must not be less than ___ times the trade diameter of the largest raceway plus the sum of the diameters of the remaining raceways on the same wall of the box.6

          

  159. The Code prohibits damage to the internal parts of electrical equipment by foreign material such as paint, plaster, cleaners, etc. Precautions must be taken to provide protection from the detrimental effects of paint, plaster, cleaners, etc. on the internal parts of ______ and ______.Panelboards, receptacles

          

  160. (Article 90) The Code applies to the installation of electrical conductors and equipment within or on public and private buildings, of outside conductors and equipment on the premises, and of optical fiber cable. (True,False)True

          

  161. (240) Conductors supplying a transformer shall be permitted to be tapped without overcurrent protection at the tap where the conductors supplying the _____ of the transformer have an ampacity at least 1/3 the rating of the overcurrent device protecting the feeder conductors.Type S

          

  162. Existing Raceway Calculations, Part 2: What are the two steps to determine the number of conductors permitted in spare space area?Step 1) cross sectional area of each conductor. Step 2) Cross sectional area for all conductors. Step 3) Size the raceway according to percent fill.

          

  163. (225) Conductors for ____ lighting shall be of the rubber-covered or thermoplastic type.Festoon

          

  164. A ______ location may be temporarily subject to dampness and wetness.Circular mils

          

  165. Pull Boxes, Junction Boxes and Conduit Bodies must be sized according to Section _____14 inches

          

  166. (240) Where an orderly shut down is required to minimize hazard() to personnel and equipment, a system of coordination based on two conditions shall be permitted. Those two conditions are (10______short-circuit protection, and (2) ______ indication based on monitoring systems or devices.Coordinated, overload

          

  167. Concrete, brick, or tile walls shall be considered as _____, as it applies to working space requirements.Grounded.

          

  168. (210)Grade-level portions of ________and _______ accessory buildings used for storage or work areas shall have ground-fault ciruit interrupter protection for all 15 and 20 ampere, 125 volt receptacles.Finished, unfinished

          

  169. (210)Multiwire branch circuits shall supply only line to _____ loadsneutral

          

  170. When conduit or tubing does not exceed _____ inches in length, it is called a nipple..013

          

  171. A device or group of devices that serves to govern in some predetermined manner the electric power delivered to the apparatus to which it is connected is a ________Controller

          

  172. (240) Flexible cords approved for use with listed appliances or portable lamps shall be considered as protected by a 20 ampere circuit breaker if they are ____.False

          

  173. A junction box contains two 2 ½ inch raceways on the left side and one 2 ½ inch raceway on the right side. The conductors from one 2 ½ inch raceway are pulled through the raceway on the righ wall. The other 2 ½ inch raceway conductors (on the side) are pulled through a 2 ½ inch raceway at the bottom of the pull box. What is the distance from between the raceways that contain the same conductors?14 inches

          

  174. (220) Feeder and service-entrance conductors with demand load determined by the use of 220.80 shall be permitted to have the ____ load determined by Section 220-61.Neutral

          

  175. (230) As used in Section 230-95, the rating of the service disconnecting means is considered to be the rating of the largest _____ that can be installed or the highest continuous current trip setting for the actual overcurrent protection device installed in a circuit breaker is rated or can be adjusted.Hexagonal

          

  176. (240) No overcurrent protection device shall be connected in series with any conductor that is intentionally grounded, except where the overcurrent protection device opens all conductors of the circuit including the _____ conductor, and is so designed that no pole can operate independently.Grounded

          

  177. Depth of Box and Conduit body sizing: When conductors enter an enclosure opposite a removable cover, such as the back of a pull box or conduit body, the distance from where the conductors enter to the removable cover should be calculated according to Table _____, one wire per terminal.4 ½ inches

          

  178. The minimum headroom of working spaces about motor control centers shall be _____.Devices, cable clamps, fixture studs or hickeys.

          

  179. What size outlet box is required for 14/3 type NM cable (with ground) that terminates on a switch, with 14/2 NM cable that terminates on a receptacle, if the box has internal cable clamps factory installed?Type S

          

  180. Where switches, cutouts or other equipment operating at 600 volts nominal, or less are installed in a room or enclosure where there are exposed live parts or exposed wiring operating at over 600 volts, nominal, the high-voltage equipment shall be effectively separated from the space occupied by _____ by a suitable partition, fence, or screen.1.526 inches

          

  181. (240) Single-pole breakers with approved handle ties can be used for the protection for each ungrounded conductor for line to nuetral connected loads.(True/False)No. 3/0

          

  182. (220) Feeder conductors for new restaurants shall not be required to be of ______ ampacity than the service-entrance conductors.Circular mils

          

  183. Understanding Chapter 9 Tables: When equipment grounding conductors are installed in a raceway, the actual area of the conductor must be used when calculating raceway fill. T/F60%

          

  184. Outlet Box Size: What size outlet box is required for six No. 12 THHN conductors, and three No. 12 THW conductors?9

          

  185. What is the area in square inches of a No. 8 bare solid?.008 sq. inch

          

  186. (230) There shall be no more than _____ disconnects installed for each service, or for each set of service-entrance conductors as permitted in Section 230-2 and 230-40.Vertical

          

  187. (220) When a calculation results in a fraction of ampere of ____ or more, we "round up" to the next ampere..50

          

  188. What is the cross -sectional area for one No. 12 RHW conductor with outer cover?.0243

          

  189. The highest current at rated voltage that a device is intended to interrupt under standard test conditions is the ______.True

          

  190. A value assigned to a circuit or system for the purpose of conveniently designating its voltage class such as 120/240 volts is called ______voltage.Nominal

          

  191. The working space in front of the electric equipment shall not be less tha _____ inches wide or the width of the equipment, whichever is greater.True

          

  192. If 1 ¼ inch flexible metal conduit has three THHN conductors (not compact) what is the largest conductor permitted to be installed.1

          

  193. (220) For other than dwelling units, the feeder and service load calculation for track lighting is to be determined at 150 volt-amperes for every ____ feet of track installed.Two

          

  194. (210)The 24 inch dimension required in a dwelling unit countertop is measured along the wall line or center line, and the intent is that there be a receptacle outlet for every _____linear feet or fraction thereof of counter length.True

          

  195. (220) Receptacle outlets in dwelling units are part of the ____ VA per square foot general lighting load.3

          

  196. Table 314-16 does not take in to consideration the volume of _____.Devices, cable clamps, fixture studs or hickeys.

          

  197. Box Fill Requirements: Each conductor that runs through the box is considered as _____ conductor.1, largest

          

  198. Openings in ventilated dry-type _____ or similar openings in other equipment over 600 volts shall be designated so that foreign objects inserted through these openings will be deflected from energized parts.Transformers

          

  199. What is the area in square inches for a No. 10 THW?.0243

          

  200. An enclosure or device so constructed that a beating rain will not enter is _______.Raintight

          

  201. Connection of conductors to terminal parts shall ensure a thoroughly good connection without damaging the conductors and shall be made by means of solder lugs, pressure connectors, splices to flexible leads. (True/False)15 inches

          

  202. (210)Receptacle outlets in a dwelling unit must be installed within _____ inches of the outside edge of each basin and the receptacle must be located on a wall that is adjacent to the basin location.Six

          

  203. (240) Type S fuses, fuse holders, and adapters are required to be designed so that tampering and shunting would be difficult (True/False)Raising of ladders

          

  204. (250) If none of the electrodes specified in Section 250-50 are available, then local metal underground systems or structures (not gas); ground rods or pipes; or plate electrodes canbe used as the required grounding electrode.(True/False)True

          

  205. The 2011 NEC defined ______ as all conductors between a source of power from a battery, a solar voltaic system, generator, transformer, or converter windings, and the final branch circuit overcurrent protections device(s).Feeder

          

  206. (215)Where a feeder supplies _____ in which equipment grounding conductors are required, the feeder shall include or provide a grounding means to which the equipment grounding conductors of branch circuits shall be connected.Branch circuits

          

  207. When different wiring systems are in the same raceway or enclosure, the grounded conductor of one system can be white and the grounded conductor of the other system can be gray (True/False)False

          

  208. A unit of an electrical system, which is intended to carry, but not utilize electrical energy. Is a______.Device

          

  209. Understanding Chapter 9 Tables: When a raceway does not exceed 24 inches, the raceway is permitted to be filled to _____ of its cross-sectional area.60%

          

  210. Pull Box Sizing, Vertical Dimension: A junction box contains two 3 inch raceways on the left side and one 3 inch raceway on the right side. The conductors from one of the 3 inch raceways on the left are pulled through the 3 inch raceway on the right wall. The other 3 inch raceways conductors are pulled through ta raceway at the bottom of the pull box. What is the vertical dimension of this box?14 inches

          

  211. So constructed that dust will not enter the enclosing case under specified test conditions is known as _____.53%

          

  212. (250) A grounding connection shall not be made to any grounded circuit conductor on the ____ side of the service disconnecting means except as permitted for separately derived systems or separate buildings.Grounded

          

  213. To guard live parts over 50 volts but less than 600 volts, the equipment can be isolated in a room accessible to qualified persons only, located on a balcony, or elevated 8 feet or more above the floor (True/False)Panelboards, receptacles

          

  214. (210)Dwelling unit GFCI protection is required for all 125-volt, 15 and 20 ampere receptacles installed to supply countertop appliances in kitchens.(True/False)True

          

  215. Pull Box Sizing, Distance between Raceways: A pull box contains two 4 inch raceways on the left and two 2 inch raceways on the top. What is the minimum distance between the two 4 inch raceways that contain the same conductors?14 inches

          

  216. Understanding Chapter 9 Tables: When all the conductors are the same size and insulation, the number of conductors permitted in a raceway can be determined simply by looking at the Tables in ______.60%

          

  217. When all the conductors are the same size, the number of conductors in a raceway can be determined by looking at the tables located in ________Annex C

          

  218. The actual area of conductor fill is dependent on the raceway size and the number of conductors installed. If there are three or more conductors installed in a raceway, the total area of conductor fill is limited to _____ percent.15 inches

          

  219. Compliance with the provisions of the Code will result in _____. (Article 90)an electrical system free from hazard

          

  220. Service conductors only originate from the service point and terminate at the service equipment (disconnect). Conductors supplied from back-up generators, battery UPS systems, transformers, etc., are considered "feeders".True

          

  221. (210)When breaks occur in dwelling unit kitchen countertop spaces for ranges, refrigerators, sinks, etc., each countertop surface is considered a separate counter space for determining receptacle placement.(True/False)4

          

  222. (230) Overhead sevice drop conductors shall have a horizontal clearance of _____ feet from a pool.(680.8)10

          

  223. Box Fill Requirements: One or more grounding conductors are considered ____ conductor based on the ____ grounding conductor that enters the box.True

          

  224. In judging equipment, considerations such as mechanical strength and arcing effects should be evaluated(True/False)True

          

  225. (210)Receptacle and cord connectors having grounding terminals must have those terminals effectively _______.Grounded

          

  226. A round 3 x 1 ½ box has a volume of 6 cubic inches and has factory internal cable clamps. Can this pancake box be used with a lighting fixture that has a domed canopy? Thee branch circuit wiring is 14/2 NM sheath cable and a paddle fan has three fixture wires and one ground wire all smaller than No. 14.0243

          

  227. How many No. 18 TFFN conductors can be installed in a ¾ inch liquidtight flexible metallic conduit?39

          

  228. Entrances to rooms and other guarded locations containing exposed live parts shall be marked with conspicuous ____ forbidding unqualified persons to enter.No. 18 and larger

          

  229. What is the total cross-sectional area of 1 ¼ inch rigid metal conduit ?.0243

          

  230. A signaling circuit is any electric circuit that energizes signaling equipment. (True/False)neutral

          

  231. (230) The _____ clearances for all service drop conductors shall be based on a conductor temperature of 60 degrees F, no wind; with final unloaded sag in the wire, conductor, or cable.Vertical

          

  232. What is the cross-sectional area in square inches for one No. 10 bare solid conductor?False

          

  233. Existing Metal Raceways: An existing Rigid metal nipple contains four No. 10 THHN and one No. 10 (bare stranded) ground wire in a 1/2 inch metal conduit. How many additional No. 10 THHN can be installed?5

          

  234. (240) Overcurrent protection for conductors and equipment is provided to ______ the circuit if the current reaches a value that will cause an excessive or dangerous temperature in conductors or conductor insulation.Open

          

  235. (230) Individual open conductors and cables other than service-entrance cables shall not be installed within _____ feet of grade level or where exposed to physical damage.10

          

  236. How many no. 14 RHH conductors can be installed in 1 inch electrical metallic tubing?39

          

  237. Working space distances shall be measured from the _____ of equipment or apparatus if such are enclosedopening.

          

  238. A(n) ______ is a point on a wiring system where current is taken to supply equipment that uses electricity.Conduit body

          

  239. (250) Stainless steel ground rods shall not be less than _____ in diameter.5/8 inch

          

  240. (240) Where used as switches in 120-volt and 277-volt fluorescent lighting circuits, circuit breakers shall be marked ______.SWD

          

  241. An insulated grounded conductor of No. ____ or smaller shall be identified by a continuous white or natural gray outer finish along its entire length.6

          

  242. (225) Lamps for outdoor lighting shall be below all _____, transformers or other electrical utilization equipment.5/8 inch