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231 True/False questions

  1. (Table 430-52)(Table 430-248-250)The branch-circuit short-circuit protection (dual element fuse) for a 5 horsepower Design E, 230 Volt motor, single phase, shall not exceed ______ ampere.50

          

  2. (514-11(A)) Single pole breakers utilizing approved handle ties cannot be used for the cicuit disconnect for gasoline dispensing equipment.(True/False)True

          

  3. (410-36 314-27(A)(2)) Where the outlet box provides adequate support, a fixture weighting up to _____ pounds may be supported by the outlet box.6

          

  4. Motor Calculations: Should be done in the order of 1) Motor full load current; 2) Overload protection; 3) Branch circuits conductor; 4) Branch circuit protection ( next size up); 5) Feeder conductor 6) Feeder Protection ( Next size down) (True/False)True

          

  5. (430-36) The minimum number of overload unit(s) required for a 3-phase alternating current motor shall be _____.3

          

  6. When sizing conductors and overcurrent protection for motors, we must comply with Article _____.430

          

  7. (366-22(A)) If an auxiliary gutter contains more than ______ current carrying conductors at any cross-section, adujustment factors outlined in 310-15(B)(3)(a) apply.30 current-carrying

          

  8. (550-2) A _____ is a factory-assembled transportable structure that bears a label identifying it as a manufactured home built on a permanent chassis and designed to be used as a dwelling with or without a permanent foundation.Manufactured home

          

  9. (400-22) One conductor of flexible cords intended to be used as a _____ circuit conductor shall have a continuous marker readily distinguishing it from the other conductor or conductors.25

          

  10. (430-32(A)(1)) An overload device used to protect continuous duty motors (rated more than 1 horsepower) shall be selected to trip or rated at no more than ______ percent of the motor nameplate full-load current rating for motors with marked service factor not less than 1.15.115

          

  11. (480-2) The nominal battery voltage of a cell is _____ volts for the lead acid type and _____ volts for the alkaline type.Fixed

          

  12. (430-32(1))Motors that do not have a service factor rating of 1.15 and up, or a temperature rise rating of 40 C or less, must have the overload protection device sized at not more than _____ percent of the motor nameplate ampere rating.125

          

  13. (410-151(C)(2)) Track lighting shall not be installed within the zone measured 3 feet horizontally and ____ vertically from the top of the bathtub rim.8

          

  14. (500-8(B)(1)) Equipment is required to be approved for the "Class" and for the explosive, combustible or ignitable properties of the specific gas or vapor, dust or fiber or flyings that will be present.(True/False)12

          

  15. (516-3(F)) The authority having jurisdiction may judge a location utilized for _____ as a "non-hazardous location" providing the conditions of the code are met.True

          

  16. (410-151(A)) Lighting track fittings shall be permitted to be equipped with general purpose receptacles.(True/False)Multiwire

          

  17. (430-32(A)(1)) Motors with a nameplate temperature rise rating not over 40 degrees C must have the overload protection device sized at no more than _____ percent of motor name plate current rating.125

          

  18. (430-102(B)(2)) The motor disconnecting means is not required to be within sight of the motor, if the required controller disconnect is capable of being individually locked in the open position.(True/False)Load

          

  19. (440-14) The disconnecting means of an air conditioner is required to be within sight of the unit, can be mounted directly in front of it, but can be inside of the unit.(True/False)True

          

  20. (402-3) The maximum operating temperature of asbestos-covered type AF heat resistant wire is _____ C.140, 25

          

  21. (Table 430-12(c)(1)) A motor terminal housing with rigidly mounted motor terminals shall have a minimum of _____ inch between line terminals for a 230 volt motor.¼

          

  22. (520-73) All receptacles in dressing rooms of theaters shall be controlled by wall switches with pilot lights or controlled by wall switches located within the room.(True/False)48

          

  23. (517-2) The patient care area is any portion of a health care facility such as business offices corridors, lounges, day rooms or similar area.(True/False)False

          

  24. (430-44) If ____ shutdown is necessary to reduce hazards to persons, the overload sensing devises shall be permitted to be connected to a supervised alarm instead of causing the motors to shut down.Orderly

          

  25. (450-46) Where practicable, transformer vaults containing more than ____ kVA transformer capacity shall be provided with a drain or other means that will carry off any accumulation of oil or water in the vault unless local conditions make this impracticable.3

          

  26. (500-6(A)(4)) Electrical equipment installed in hazardous (classified) locations must be constructed for the class, division, and group. A Group "D" atmosphere contains gasoline, methane, and propane.(True/False)20 ampere

          

  27. (430-87) Each motor shall be provided with an individual controller.(True/False)True

          

  28. (410-16(C)(3)) In clothes closets recessed incandescent lighting fixtures with a completely enclosed lamp shall be permitted to be installed in the wall or on the ceiling, provided there is a minimum clearance of ______ inches between the fixture and the nearest point of storage space.18

          

  29. (430-52)Short circuit and ground fault protection (except torque motors) must be sized no greater than the percentages listed in Table ________430-52

          

  30. (514-11(A)) Each circuit leading to or through a dispensing pump shall be provided with a switch or other acceptable means to disconnect simultaneously from the source of supply of all conductors of the circuit, including the _____ conductor, if any.Grounded

          

  31. (430-52(C)(1)(ex 2b)) If the branch circuit short-circuit ground-fault protection dual-element fuse selected (sized not greater than the percentages listed in Table 430-152) , is not capable of carrying the load, the next larger size dual element fuse can be used. The next size dual element fuse cannot exceed _____ of the motor full-load current rating.Full-load current, horsepower

          

  32. (520-42) On fixed stage equipment, portable or strip light fixtures and connector strips shall be wired with conductors having insulation rated _____ C or suitable for the conditions.125

          

  33. (314-40(C)) Metal boxes over _____ cubic inches in size shall be constructed so as to be of ample strength and rigidity.100

          

  34. (501-10(B)(2)) Where provision must be made for limited flexibility, such as at motor terminals, in a Class I Division 2 location, flexible conduit with approved fittings may be used.(True/False)True

          

  35. (501-15(C)(6)) The cross-sectional area of the conductors permitted in a seal shall not exceed _____ percent of the cross-sectional area of rigid metal conduit, unless the seal is specifically listed for a higher percentage of conductor fill.True

          

  36. (500-5(A)) Through the exercise of ingenuity in the layout of the electrical installation for hazardous (classified) locations, it is frequently possible to locate much of the equipment in less hazardous or in nonhazardous locations and thus to reduce the amount of special equipment required (True/False).115

          

  37. (408-19)An Insulated conductor used within a switchboard shall be listed, flame retarden, and rated for the highest voltage it may contact.(True/False)True

          

  38. (427-4) The ampacity of branch circuit conductors and the rating or setting of overcurrent protective devices supplying fixed electric heating equipment for pipelines and vessels shall not be less than ______ percent of the total load of the heaters.125

          

  39. (430-32(A)(1))Motors and their associated equipment must be protected against overcurrent (overload, short circuit or ground-fault), but because of the special characteristics of induction motors, overcurrent protection is generally accomplished by having the overload protection separate from the short-circuit and ground-fault protections.(True/False)True

          

  40. (366-2) An auxiliary gutter is permitted to contain conductors or busways.(True/False)Not hard

          

  41. (Table 450-3(B)) A transformer not over 600 volts requires overcurrent protection in the form of an individual overcurrent device on the primary side rated or set at not more than 125 percent of the rated primary current of the transformer, or a secondary overcurrent device set at not more than 125 percent of the rated secondary transformer, if the primary overcurrent device is set at not more than 250 percent of the rated primary current of the transformer (True/False)110

          

  42. (430-52(C)(1)(ex.))If a short circuit ground fault protection device value does not correspond with the standard rating or setting of overcurrent protection devices, the next ______ protection device may be used.Short-circuits and ground-faults

          

  43. (555-19, 555-2) In locating receptacles in a marina, consideration should be given to the maximum tide level and wave action.(True/False)Damp

          

  44. (511-3(C)(1)(b)) For each floor area inside a commercial garage, the entire area up to a level of _____ above the floor shall be considered to be a Class I Division 2.18

          

  45. (430-111)(B)(3)An oil switch used for both a controller and disconnect is permitted on a circuit whose rating _____volts or 100 amperesSimultaneously disconnects all conductors of the circuit.

          

  46. (430-75(B))If the control circuit transformer is located in the controller enclosure, the transformer must be connected to the _____ side of the control circuit disconnect.Load

          

  47. (600-21(A)-(D)) Ballasts, transformers, and electronic power supplies shall be located where accessible and shall be securely fastened in place an a working space at least _____ shall be provided.35,000 volts

          

  48. (604-7(B))Each section of a manufactured wiring system shall be marked to identify _____.Its type of cable or conduit.

          

  49. (422-16(B)(1)(2)) A disposal can be cord and plug connected. The cord must not be less than 18 iches or more than____ inches and must be protected from physical damage.12

          

  50. (400-10) Flexible cords shall be connected to devices and to fittings so that tension will not be transmitted to joints or terminal screws. This shall be accomplished by knotting the cord, winding with tape, or using fittings designed for the purpose (True/False)True

          

  51. (430-28(2)) Motor tap conductors shall not exceed _____ feet.Not hard

          

  52. (430-32(A)(1)) Motors that have a service factor of 1.10 must have the overload protection device sized at not more than ____ percent of the motor nameplate ampere rating.125

          

  53. (430-24 )One branch circuit serves 3 15 HP 208 Volt 3-phase motors, 3 3 horsepower 208 volts 1 phase motors, and 3 1 horsepower 120 volt single phase motors. This requires a No. _____ THHN for the feeder, if the motor terminals are rated for 75 C.4/0

          

  54. (518-4(A)) The following wiring methods can be installed in a place of assembly... metal raceways, MC cable, and type AC cable containing an insulated equipment grounding conductor.(True/False)True

          

  55. (410-136(B)) Surface mounted lighting fixtures with ballast must have a minimum clearance of _____ inches from combustible low density fiberboard, unless the fixture is marked "suitable for surface mounting on Combustible low-density cellulose fiberboard."If of sheet steel be at least .016 inches thick.

          

  56. (Table 430-248-250) What is the VA input of a dual voltage 5 horsepower 3-phase motor rated 460/230 volts?6055VA

          

  57. (408-40) When equipment grounding conductors are installed in panelboards, a _____ is required for the proper termination of the equipment grounding conductors.True

          

  58. (430-62(a)) The feeder protection for a 25 horsepower 208 volt 3 phase and thre 3 horsepower 120-volt motors would be _____, after balancing. Note: Use Inverse time breakers (ITB)225 ampere

          

  59. (410-30(B)) Metal poles used for the support of lighting fixtures must be bonded to an _____.6

          

  60. (410-30(A)) The maximum weight of a light fixture that may be mounted by the screw shell of a brass socket is _____ pounds.6

          

  61. (430-51) The branch-circuit short-circuit and ground-fault protection device is intended to protect the motor, the motor control apparatus and the conductors against overcurrent due to _______.Short-circuits and ground-faults

          

  62. (430)Article 430 Part ____ contains the requirements for motor overload protection, and Article 430 Part ____ contains the requirements for short-circuit and ground-fault protection.3,4

          

  63. (430-32(A)(1)) Motors with a nameplate service factor (SF) rating of 1.15 or more must have the overload protection device sized at no more than _____ percent of motor nameplate current rating.125

          

  64. (430-36)If overload protection is to be accomplished by the use of fuses, a fuse must be installed to protect each ______ conductor.Ungrounded

          

  65. (430-31)Overload is the condition in which current exceeds the ______ , which can result in equipment damage due to dangerous overheating.FLC

          

  66. (430-17)When selecting the feeder conductors or feeder short-circuit ground-fault protection device, the highest rated motor shall be the highest rated motor _______, not the highest rated _______.175 ampere

          

  67. (314-23(D)(1)) Outlet boxes can be secured to suspended ceiling framing members by mechanical means such as bolts, screws or rivets or other means identified for the suspended ceiling framing member(s).(True/False)Weatherproof

          

  68. (430-52(C)(1) When selecting the feeder conductors and short circuit ground-fault protection device, the highest rated motor shall be the highest rated ______.4

          

  69. (408-20) Switchboards that have any exposed live parts shall be located in permanently _____ locations and then only where under competent supervision and accessible only to qualified persons.Busbars

          

  70. (620-22(A)) A separate _____ is required for the elevator car lights, receptacle(s) auxiliary lighting power source, and ventilation.Branch circuit

          

  71. (Table 430-22(e) ) The branch circuit conductors of a 5 horsepower 230 volt motor with a nameplate rating of 25 ampere shall have an ampacity of not less than _____. Note: the motor is used for intermittent duty and cannot run for more than 5 minutes at any one tie due to the nature of the apparatus it drives.21 amperes

          

  72. (410-56(D)) No _____ splices or taps shall be made within or on a fixture.Unnecessary

          

  73. (440)Article 440 applies to electric driven air-conditioning and refrigeration equipment that has a hermetic refrigerant motor compressor (True/False)1

          

  74. (Table 430-248-250) What is the input VA of a 3 horsepower 208-volt single phase motor?6055VA

          

  75. (430-62(a)) There are three motors: one 5 horsepower 230-volt motor with service factor of 1.2 and two 1 ½ horsepower 120-volt motors. The three motors are fed with a 3-wire cable. Using an inverse time breaker, the feeder conductor protection device after balancing all three motors would be _____.21 amperes

          

  76. (Table 400-4) Type HPD cord is permitted for _____ usage.Not hard

          

  77. (430-52(C)(1) Motor feeder conductors (sized according to 430-24) must have a feeder protection device to protect against short-circuits and ground-faults (not overloads) sized greater than the ____ branch circuit short-circuit and ground-fault protection device [Section 430-52] of any motor of the group plus the sum of full load currents of the other motors on the same______.125, sum

          

  78. (422-46) Electrically heated smoothing irons shall be equipped with an identified _____ means.Temperature limiting

          

  79. (400-8) Flexible cords shall not be used as a substitute for _____ wiring.Weatherproof

          

  80. (430-32(a) (1)) The standard overload protection device for a 2 horsepower 115 volt motor that has a full-load current rating of 24 ampere, and a nameplate rating of 21.5 ampere shall not exceed _____.24.7 amperes

          

  81. (550-10(A)(ex)) A mobile home that is factory-equipped with gas or oil-fired heating and cooking appliances shall be permitted to be supplied with a listed mobile home supply cord rated ______ amperes.40

          

  82. (312-5(C)) Cables entering a cutout box shall have a maximum of two cables per connector.(True/False)True

          

  83. (600-8(C)) Sign and outline lighting enclosures for live parts other than lamps and neon tubing shall _____.1000

          

  84. (514-9) In a gas station, an approved seal shall be provided in each conduit run entering or leaving a dispenser and in the first fitting after the conduit emerges from the ground or concrete.(True/False)25

          

  85. (620-11(A)) The conductors to the hoistway door interlocks from the hoistway riser shall be suitable for a temperature of hot less than _____ C and shall be type SF or equivalent.200

          

  86. (424-19) The branch cicuit conductor and overcurrent protection device for fixed electric space heating equipment loads shall not be smaller than _____ percent of the total load.True

          

  87. (450-42) The walls and roofs of transformer vaults shall have a minimum fire resistance of _____ hours.3

          

  88. (430-24)Feeder conductor size: Conductors that supply several motors must have an ampacity of not less than _____ percent of the highest rated motor full-load current (Table 248-250) plus the _____ of the full load currents of the other motors on the same phase.125, sum

          

  89. (501-15(A)(ex)) Conduits of 1 ½ inches and smaller entering an explosion-proof enclosure for switches intended to interrupt current n the normal performance of the function shall not be required to be sealed if the current-interrupting contacts are within a chamber hermetically sealed against the entrance of gases and vapors(True/False)125

          

  90. (500-6(B)(2)) A Group "F" atmosphere contains carbon black, charcoal, coal, or coke dusts that have been sensitized by other materials so that they present an explosive hazard.(True/False)True

          

  91. (513-3) In what Class and Division are the following areas of an aircraft hangar classified? Any pit or depression below the level of the hangar floor; areas adjacent to and not suitably cut off from the hangar; and areas within the vicinity of the aircraft?I

          

  92. (410-103) A 1000 watt incandescent lamp requires a _____ base.Mogul

          

  93. (424-13) Fixed electric space heating equipment shall be installed to provide the _____ spacing between the equipment and adjacent combustible material, unless it has been found to be acceptable where installed in direct contact with combustible material.Overload

          

  94. (430-109(B)) The branch circuit overcurrent protection device such as a plug fuse may serve as the disconnecting means for a stationary motor of 1/8 horsepower or less.(True/False)True

          

  95. (600-5(A))Each commercial building and occupancy with ground floor access for pedestrians shall have at least one outside sign outlet supplied by a ____ ampere branch circuit that supplies no other load.20

          

  96. (424-72(A)) A boiler employing resistance-type immersion heating elements contained in an ASME rated and stamped vessel and rated more than 120 amperes shall have the heating elements subdivided into loads not exceeding ____ amperes.120

          

  97. (430-52(C)(1)(ex. 2)) The NEC requires motor branch circuit short-circuit and ground-fault protection to be sized not greater than the percentages listed in Table 430-52. When the short-circuit ground-fault protection device value determined from Table 430-52 does not correspond with the standard rating of overcurrent devices as listed in Section 240-6(A), the next ______ size must be used.Larger

          

  98. (312-2) Cabinets or cutout boxes installed in wet locations shall be _____.Not hard

          

  99. (408-36(ex 2) A lighting and appliance branch circuit panelboard contains six 3-pole breakers and eight 2-pole breakers. The maximum allowable number of single-pole breakers that can be added to this panelboard is ______.8

          

  100. (430-22) For a 1 horsepower 120-volt motor, nameplate current rating of 14 amperes, The branch circuit conductors can be No. 14 THHN.(True/False)40 ampere

          

  101. (410-82(A)) Portable lamps shall be wired with _____ , recognized by Section 400-4, and have an attachment plug of the polarized or grounding type.True

          

  102. (Table 430-248, 430-22)What size THHN conductor is required for a 2 horsepower 230-volt, single phase motor?24.7 amperes

          

  103. (430-480) The attachment plug and receptacle shall not exceed _____ amperes at 250 volts for a cord-and-plug connected air-conditioning motor compressor.Mogul

          

  104. (410-16(B)) The NEC requires a lighting outlet in clothes closets.(True/False)Unnecessary

          

  105. (430-24) When selecting the conductors according to Section 430-24, the motor with the highest _____ shall be the highest-rated motor.125, 430.238-250

          

  106. (Table 430-52) The branch circuit short-circuit protection device for a 10 horsepower 230 volt single-phase wound rotor motor shall not exceed _____. Note: Use an inverse time breaker for protection.Short-circuits and ground-faults

          

  107. Motor feeder conductors must have protection against short-circuits and ground faults, but not ______.Overloads

          

  108. (400-5(A)(1)) A three conductor No. 16 SJE cable (one conductor is used for grounding) shall have a maximum ampacity of _____ amperes for each conductor.13

          

  109. (517-25) The essential electrical systems in a health care facility shall have sources of power from a normal source generally supplying the entire electrical system, and one or more alternate sources for use when the normal source is interrupted.(True/False)½ inch

          

  110. (501-15(B)(2)(ex)) No seal is required if a conduit (with no unions, couplings, boxes or fittings) passes through a Class I Division 2 location if the termination points of the unbroken conduit are in at least ____ inches within the unclassified location.12

          

  111. (430-62(a)) If an inverse-time breaker is used for the feeder short-circuit protection, what size protection is required for the following -phase motors? 1) 40 horsepower 52 FLC; 2) 20 horsepower 27 FLC; 3) 10 horsepower, 14 FLC; 4) 5 horsepower, 7.6 FLC.175 ampere

          

  112. (314-29) Outlet boxes, junction boxes, and pull boxes are required to be accessible.(True/False)Mogul

          

  113. (430-72(B)(2) Table 430-72(B))) Motor control circuit conductors that extend beyond the motor control equipment enclosure shall be required to have short-circuit and ground-fault protection sized not greater than ____percent of the conductor ampacity as listed in Table 310-16 for 60 C conductors.False

          

  114. (500-5(B)) Class I Division I locations are those that are hazardous because of the presence of _____.Combustible gases or vapors

          

  115. (430-32(1) If a dual element fuse is used for overload protection, what size fuse is required for a 5 horsepower 230 volt motor, single phase motor, service factor 1.16, if the motor nameplate current rating is 28 ampere?35

          

  116. (314-23(F)) Enclosures not over 100 cubic inches that have threaded entries that support lighting fixtures or contain devices shall be considered adequately supported where two or more conduits are threaded wrenchtight into the enclosure where each conduit is supported within _____ inches.6

          

  117. (518-2(A)) Examples of places of assembly could include (but are not limited to) restaurants, conference rooms, and pool rooms.(True/False)True

          

  118. (545-2) The plans specifications and other building details for construction of manufactured buildings are included in the ______ details.Building system

          

  119. (500-5(C)(1)(1)) Locations in which combustible dust is in the air under normal operating conditions in quantities sufficient to produce explosive or ignitable mixtures are classified as _____.Class II Division I

          

  120. (455-8(A)) The phase converter disconnecting means shall be _____ and located in sight from the phase converter.True

          

  121. (314-16(B)(1) Equipment grounding conductors and not more than ____ fixture wires (smaller than No. 14 shall be permitted to be omitted from the calculations where they enter the box from a domed fixture or similar canopy.4

          

  122. (430-51)Branch short-circuit and ground-fault protection is intended to protect the motor, the motor control apparatus, and the conductors against short circuit or ground faults, but are not intended to protect against _____.False

          

  123. (404-9(C)) A faceplate for a flush-mounted snap switch shall not be less than _____ inches thick when made of a nonferrous metal..04

          

  124. (366-100(a)) Auxiliary gutters shall be constructed and installed to maintain mechanical and _____ continuity.Bending or twisting

          

  125. (404-2(b)(ex)) Switches or circuit breakers shall not disconnect the grounded conductor of a circuit unless the switch or circuit breaker _____.600

          

  126. (410-64) Lighting fixtures shall not be used as a raceway for circuit conductors, except lighting fixtures designed for end to end assembly to form a continuous raceway, or lighting fixtures connected together by recognized wiring methods shall be permitted to carry through conductors of 2-wire or ______ branch circuit supplying the lighting fixtures.Multiwire

          

  127. (430-31) Overload is the condition where current is greater than the equipment ampacity rating resulting in equipment damage due to dangerous overheating [Article 100] Overload protection devices, sometimes called heaters, are intended to protect the motor, motor-control equipment and branch circuit conductors from dangerous overheating.(True/False)125, sum

          

  128. When sizing conductors and overcurrent protection for motors, you must comply with th requirements of NEC Article 430, not Article 240.(True/False)Overloads

          

  129. (517-64(A)) In anesthetic areas, low-voltage equipment that is frequently in contact with the bodies of persons or has exposed current-carrying elements shall operate on electrical potential of 10 volts or less, be moisture resistant, and be intrinsically safe or double insulated.(True/False)120

          

  130. (422-31(B)) For permanently connected appliances rated over ____ volts, amperes, or horsepower, the branch circuit switch or circuit breaker shall be permitted to serve as the disconnecting means where the switch or cidrcuit breaker is within sight from the appliance or is capable of being locked in the open position.35,000 volts

          

  131. (426-50(A)) All fixed outdoor de-icing and snow-melting equipment shall be provided with a means for disconnection from all _____ conductors.Grounded

          

  132. (410-36(G)) Trees can be used to support lighting fixtures(True/False)True

          

  133. (410-117(C)) The minimum distance an outlet box containing fixture tap supply conductors can be placed from a recessed fixture is _____ feet1

          

  134. (511-7(B)(1)(b)) A permanently mounted lighting fixture in a commercial garage and located over lanes on which vehicles ar commonly driven shall be located not less than ____ feet above floor level.18

          

  135. (406-9(2)(b)) An enclosure that is weatherproof only when the receptacle cover is closed can be used for receptacles in a wet location when the receptacle is used for portable equipment or portable tools while attended (True/False).True

          

  136. (551-739(A)) Electrical service and feeders of a recreational vehicle park shall be calculated at a minimum of ______ VA per site (not including tent sites).True

          

  137. (Table 515-3) An above ground tank in a bulk storage plant is a Class I Group Division 1 location within ______ feet of open end of vent, extending in all directions.True

          

  138. (404-14(a)) Alternating current general use snap switches can control resistive loads that do not exceed the amperage and voltage rating of the switch; inductive and tungsten filament (120 volt) loads that do not exceed the ampere and voltage rating of the switch; or motor loads (2 horsepower or less) that do not exceed 80 percent of the ampere rating of the switch.(True/False)90

          

  139. (525-13(D)) Cord connectors for carnival circuses, and fairs can be laid on the ground when the connectors are _____ for a wet location, but they must not be placed in audience traffic paths or within areas accessible to the public, unless guarded.Listed

          

  140. (Table 555-12) The demand percentage used to calculate 45 receptacles on a boat yard feeder is _____ percent.True

          

  141. (517-18(A)) In health care facilities, patient bed receptacles located in general care areas shall be supplied by at least two branch circuits. The branch circuits for these receptacles can originate from two separate transfer switches on the emergency system.(True/False)Electrical

          

  142. (430-24)What size feeder conductor (in ampere) is required for two motors. Motor 1) 7 ½ horsepower single phase, 230 volts (40 ampere) ; Motor 2) 5 horsepower single phase 230 volts (28 ampere) Terminals rated for 75 C.No. 4

          

  143. (517-19(B)) In critical care areas of health care centers, each patient bed location shall be provided with a minimum of ____ duplex receptacles.True

          

  144. (406-5(A) Receptacles mounted in boxes that are set back of the wall surface shall be installed so that the mounting _____ of the receptacle is held rigidly at the surface of the wall.Weatherproof

          

  145. Motors and their associated equipment must be protected against overcurrent. Due to the special characteristics of induction motors, overcurrent protection is generally accomplished by having the overload protection separated from the _____.Short circuit and ground fault protection device.

          

  146. (430-22 430-32 430-52) Conductors are sized at _____ percent of the motor full-load currents [Section 430-6 and 430-22], overloads from _____ percent, and the motor short-circuit ground-fault protection device (inverse time circuit breaker) is sized up to _____. (There is no relationship between the branch circuit conductor ampacity and the short-circuit ground-fault protection device!)125, 430.238-250

          

  147. (408-3(2)) Barriers shall be placed in all service switchboards to isolate the service _____ and terminals from the remainder of the switchboard.True

          

  148. (550-31) A small mobile home park has six mobile homes. What is the total park electrical wiring system load after applying the demand factors permitted in Article 550?Unnecessary

          

  149. (430-107) Where more than one motor disconnecting means is provided in the same motor branch circuit, only one of the disconnecting means is required to be readily accessible.(True/False)True

          

  150. (426-2) Examples of snow melting resistance heaters could be tubular heaters and strip heaters, immersion heaters and heating blankets, or heating cables or heating tape.(True/False)125

          

  151. (430-32(A)(1),430-32(C))Motors rated more than 1 horsepower without integral thermal protections, and motors 1 horsepower or less (automatically started) must have an overload device sized in response to the __________.Motor nameplate rating

          

  152. (422-18) Ceiling fans that do not exceed _____ pounds in weight, with or without accessories, must be supported by outlet boxes identified for such use and supported in accordance with Sections 370-23 and 370-27.Multiwire

          

  153. (430-52(C)(1) A 30 horsepower 460 volt 3 phase synchronous motor and a 10 horsepower 460 volt 3 phase motor, on the same circuit... The 30 horsepower motor has No 8 THHN with a 80 ampere breaker, the 10 horsepower motor has a No. 14 THHN with a 35 ampere breaker, and the feeder conductors must be No. 6 THHN and be on a 90 ampere breaker (True/False).True

          

  154. (540-2) A professional-type projector employs 35 or 70 mm film.(True/False)True

          

  155. (430-52 Table 430-250) A 2 horsepower 120 volt wound rotor motor requires a _____ branch circuit protection device.False

          

  156. (430-62(a)) If dual-element fuses are used to protect a three-wire 110/230 volt feeder conductor for twenty two ½ horsepower single phase 115 volt motors, the fuse size selected should not be greater than ______.110 ampere

          

  157. (Table 430-52)(Table 430-248-250)To determine the size of the motor branch circuit, short circuit and ground fault protection device, one should (1) Locate the motor type on Table 430-52 (2) Select the percentage according to the type of protection device.(True/False)True

          

  158. (630-12(A)Each arc welder shall have overcurrent protection rated or set at not more than _____ percent of the rated primary current of the welder.200

          

  159. (424-39) The minimum clearance between an electric space heating cable and an outlet box used for surface lighting fixtures shall not be less than _____ inches.150 (not in 2011 code)

          

  160. (550-13(B)) Ground-fault circuit-interrupter (GFCI) protection in a mobile home is required for outlets installed outdoors, receptacles in a lavatory, and a receptacle within a bathroom light fixture.(True/False)True

          

  161. (430-22)Branch circuit conductors to a single motor must have an ampacity of not less than _____ percent of the motors full load current as listed in Tables ______ .125, 430.238-250

          

  162. (Table 430-52)(Table 430-248-250)For a 1 horsepower 120-volt motor, nameplate current rating of 14 amperes, short circuit and ground fault protection is permitted to be a ______ circuit breaker.3890 VA

          

  163. (430-31) Feeder conductors that supply motor and other loads must have overcurrent protection against short-circuit, ground-fault and overload.(True/False)125, 430.238-250

          

  164. (410-115(A)) Lighting fixtures shall be so constructed that adjacent combustible material will not be subjected to temperature in excess of _____ C.True

          

  165. (501-105) Meters, instruments, and relays, including kilowatt-hour meters, instrument transformers, resistors, rectifiers, and thermionic tubes, in Class I Division I locations must be installed in explosion-proof enclosures or purged and pressurized enclosures.(True/False)20

          

  166. (430-32(A)) The NEC requires motor overload protection devices to be sized according to the motor full-load current rating as listed in Tables 430-147, 148, or 150. (True/False)False

          

  167. (450-11) A transformer rated____ kVA and larger shall be provided with a nameplate giving the ame of the manufacturer, rated kVA, frequency, primary and secondary voltage, and the impedance of the transformers.25

          

  168. (110-14(C)(1)The actual conductor size for a motor feed must be selected from Table 310-15(A)(16) using the column that complies to the_____ of the equipment.Terminal temperature rating

          

  169. (210-5(C)) All panelboard circuit breaker _____ shall be legibly identified as to purpose or use on a circuit directory located on the face or inside of the panel doors.Load

          

  170. (Table 430-52)(Table 430-248-250)The branch-circuit short-circuit protection (inverse time breaker) for a 25 horsepower synchronous 460 volt motor, 3-phase, shall not exceed ____ ampere.70

          

  171. (424-91) A heating panel is complete assembly provided with a junction box or a length of flexible conduit for connection to a ______.Branch circuit

          

  172. (430-32(A)(1)) If a dual-element fuse is used for overload protection, what size fuse is required for a 5 horsepower208-volt, 3 phase motor, service factor 1.16, motor nameplate current rating of 16 ampere (FLA)?20 ampere

          

  173. (430-53(C)(4))The Feeder overload protection (circuit breaker in panel) must be sized not greater than The largest branch circuit short circuit ground fault protection device of any motor in the group, plus the sum of the full load currents of the other motors(on the same time and phase).(True/False)24.7 amperes

          

  174. (430-32(A)(1)) If a dual-element fuse is used for the overload protection, what size fuse is required for a 30 horsepower 460 volt 3-phase synchronous motor, temperature rise 39 C?20 ampere

          

  175. (551-45(B)) The working clearance for a distribution panel board located in a recreational vehicle shall be no less than 24 inches wide and 30 inches deep.(True/False)8

          

  176. (314-24(A)) The internal depth of outlet boxes intended to enclose flush devices shall be at least _____ inch.60 amperes

          

  177. (Table 430-248-250) Which is the highest rated motor for the following? Motor 1) 10 horsepower, 3 phase 208 volts; 2) 5 horsepower, single-phase, 208 volts; 3) 3 horsepower, single phase, 120 volts.No. 10

          

  178. (406-9) A receptacle shall be considered to be in a location protected fro the weather where located under roofed open porches, canopies, marquees, and the like and will not be subjected to ______.Beating rain or water run-off

          

  179. (404-17) A fused switch shall not have fuses _____.A flame arrester

          

  180. (430-22, 430-32(A)(1), 430-52(C)(2)) For a 10 horsepower 208-volt, 3-phase motor, nameplate current 29 ampere, a) the branch circuit conductors can be No. 8 THHN; b) Overload protection is from 33 ampere to 38 ampere; and c) Short-circuit and ground-fault protection is an 80 ampere circuit breaker.(True/False)225 ampere

          

  181. (410-10(D)) Not part of cord-connected lighting fixtures, hanging lighting fixtures, lighting track, pendants, or suspended ceiling fans shall be located within a zone measured 3 feet horizontally and ____ feet vertically from the top of the bathtub rim or shower stall threshold.True

          

  182. (430-52(C)(1) ) To determine the percentage of the motor FLC from Table 430-152 that is to be used to size the motor branch circuit short-circuit ground-fault protection device, a) Locate the motor type on Table 430-152, such as direct current, wound rotor, high reactance, autotransformer start, or all other motors; b) Locate the motor starting conditions, such as Code letter or no Code letter; and c) Select the percentage from Table 430-152 according to the type of protection device, such as one-time fuse, dal element fuse, or circuit breaker.(True/False)True

          

  183. (366-23) The continuous current-carrying capacity of 1 square inch copper busbar mounted in an unventilated enclosure is _____ amperes.1000

          

  184. (445-11) Each generator shall be provided with a ____ giving the maker's name, the rated frequency, power factor, number of phases if of alternating current, and the rating in kilowatts or kilovolt-amperes.True

          

  185. (410-140(B)) Electric discharge lighting fixtures having an open circuit voltage exceeding _____ volts shall not be installed in or on dwelling occupancies.1000

          

  186. Generally, the motor overload device is part of the ____, however, a separate overload device like a _______ may be used.25

          

  187. (406-9) Interior locations protected from weather but subject to moderate degrees of moisture such as some basements, some barns, some cold-storage warehouses and the like, the partially protected locations under canopies, marquees, roofed open porches and the like shall be considered to be _____ locations.Damp

          

  188. (Table 430-52)(Table 430-248-250)(430-53(C)(4))What size feeder protection (inverse time breaker) is required for a 5 horsepower, 230 volt, single phase motor and a 3 horsepower, 230 volt, single phase motor?True

          

  189. (430-52 Table 430-152) The branch circuit protection for a 125 horsepower 240-volt direct current motor is _____.125 ampere

          

  190. (600-6) Each sign and outline lighting system, or feeder circuit or branch circuit supplying a sign or outline lighting system shall be controlled by an externally operable switch or circuit breaker that opens all _____ conductors.Ungrounded

          

  191. (501-115(A)) Switches, circuit breakers, motor controllers, and fuses, including push buttons, relays, and similar devices installed in Class I Division 1 locations shall be provided with approved explosion-proof enclosures, and they shall be approved as a complete assembly for Class I locations.(True/False)True

          

  192. (Table 430-52) In addition to overload protection, each motor and its accessories requires short-circuit and ground-fault protection according to the requirements of Section 430-52. When sizing the branch circuit protection device, we must consider the motor type, such as induction, synchronous, wound-rotor, etc.; the motor Code letter starting characteristics; and the type of protection device to be used, fuse of breaker.(True/False)Ungrounded conductor

          

  193. (314-16(B)(5)) A box has three equipment grounding conductors. When determining the number of conductors in a box for box fill calculations the three grounding conductors are counted as ______ conductor(s).½ inch

          

  194. (620-85) All 125 volt, 15 and 20 ampere receptacles installed in machine rooms and spaces for elevators and escalators shall be GFCI protected by a GFCI receptacle or a GFCI circuit breaker.(True/False)Electrical

          

  195. (480-10(A)) Each vented cell of a battery shall be equipped with _____.A flame arrester

          

  196. (430-9(B)) Conductors for motors, controllers and terminals of control circuit devices are required to be of copper wire unless identified with different conductors.True

          

  197. (422-12) A(n) _____ branch circuit must supply central heating equipment, other than fixed electrical space heating equipment.120

          

  198. (525-18(A)) GFCI protection is required for all ____ ampere 125 volt receptacle outlets used by personnel at carnivals, circuses and fairs (not used for cooking or refrigeration equipment). The GFCI protection can be by circuit breaker, receptacle, an integral part of the attachment plug, or a listed cord set incorporating GFCI protection.15,20 and 30

          

  199. (Figure 430-1)Which parts of Article 430 contain the requirements for motor overcurrent protection?No. 14

          

  200. (430-32(a)(2) The ultimate trip overload device of a thermally protected 1 ½ horsepower 120 volt motor would be rated no more than ______.31.2 ampere

          

  201. (511-3(E)(1)) Areas adjacent to defined locations in commercial garages where flammable vapors are not likely to be released shall not be classified when mechanically ventilated at a rate of _____ or more air changes per hour or when effectively cut off by walls or partitions.18

          

  202. (410-62(B)) Lighting fixtures that require adjustment or aiming can be cord-connected without an attachmet plug.True

          

  203. (430-32(1))If a dual element fuse is used for overload protection, what size fuse is required for a 50 horsepower 460 volt, 3 phase motor, temperature rise 39 C motor nameplate current rating of 60 ampere (FLA?)20 ampere

          

  204. (430-52(1) For general motor application, the motor branch circuit short-circuit ground-fault protection device must be sized based on the _____ amperesNEC Table

          

  205. (430-36)If a fuse is used for overload protection on a motor, one must be installed on each _______.20 ampere

          

  206. (402-10) Fixture wires shall be permitted (1) for installation in lighting fixtures and in similar equipment where enclosed or protected and not subject to _____ in use, or (2) for connecting lighting fixtures to the branch circuit conductors supplying the lighting fixtures.True

          

  207. (503-155(A)) The power supply to contact conductors of a crane in a Class III location shall be isolated from all the other systems; have an alarm in case of a ground-fault; and be equipped with an acceptable ground detector.(True/False)25

          

  208. (501-10(A)(1)) Wiring methods permitted in Class I Division I locations include threaded rigid metal or threaded steel intermediate metal conduit and explosion proof threaded boxes, fittings, and joints.(True/False)15,20 and 30

          

  209. (Table 430-52)(Table 430-248-250)The branch-circuit short-circuit protection (non-time delay fuse) for a 3 horsepower 115 volt motor shall not exceed _____ ampere.110

          

  210. (430-24) Feeder conductors that supply several motors must have an ampacity of not less than 125 percent of the highest rated motor FLC and the sum of the full load currents of the other motors on the same phase.(True/False)True

          

  211. (450-21(C)) Dry-type transformers installed indoors rated over _____ shall be installed in a vault.100

          

  212. (426-30) Exposed elements of impedance heating systems shall be physically guarded, isolated, or thermally insulated with a _____ jacket to protect against contact by personnel in the area.Weatherproof

          

  213. (406-9(E)) Grounding type attachment plugs shall be used only where an _____ ground is provided.Equipment

          

  214. (404-8) All switches and circuit breakers used as switches must be installed so that they can be operated from a readily accessible place.True

          

  215. (314-17) Metal plugs or plates used with nonmetallic boxes shall be recessed _____ inch.¼

          

  216. (410-52) Lighting fixtures shall be wired with conductors having insulation suitable for the environmental conditions and temperature, voltage, and current to which the conductors whill be subjected.(True/False)False

          

  217. (430-32(C)) Where an overload relay selected by Section 430-32(a)(1) and (c)(1) is not sufficient to start the motor or carry the load, the next higher size overload relay is permitted. Provided the trip current does not exceed ____ percent of the motor full-load current rating if the motor is marked with a service factor of 1.12.130

          

  218. (500-5(D)(1)) Class III Division _____ locations include areas where easily ignitable fibers or combustible flying material is handled, manufactured or used.I

          

  219. (430-22 ) (Table 310-15(B)(16) What is the size THHN conductor required for a 5 horsepower 230-volt, single phase motor? Terminals are rated 75 C.No. 10

          

  220. (430-32(1))For a 1 horsepower 120-volt motor, nameplate current rating of 14 amperes, Overload protection is from _____ampere.40 ampere

          

  221. (370-384) Outlet boxes which support paddle fans must be listed and marked by the manufacturer as suitable for this purpose.(True/False)True

          

  222. (430-32(c)) The maximum overload protective device relay for a 2 horsepower 115 volt motor with a nameplate rating of 22 ampere is _____ The service factor is 1.2.30.8 ampere

          

  223. (314-22(ex) Only a _____ wiring method can be used for a surface extension from a cover, and the wiring method must include an equipment grounding conductor.True

          

  224. (422-22(B)) Resistance type heating elements in electric space heating equipment shall be protected at not more than _____.60 amperes

          

  225. (430-32(1))Motors with a nameplate temperature rise rating not over _____ C shall have the overload protection devices sized no more than _____ percent of motor nameplate rating.115

          

  226. (430-32(C)) The standard size overload protection device must be sized according to the requirements of Section 430-32 of the NEC. If the overload protection relay sized according to Section 430-32 is not capable of carrying the motor starting and running current, the next size up overload can be used if sized according to the requirements of Section 430-32(C).(True/False)True

          

  227. (422-10(A)) Individual appliances that are continuously loaded shall have a branch circuit rating sized no less than _____percent of the appliance marked ampere rating.125

          

  228. (314-71(A)) For straight pulls, the length of the box shall be not less than ____ times the outside diameter, over sheath, of the largest conductor or cable entering the box on systems over 600 volts.48

          

  229. (460-8(A)) The ampacity of capacitor circuit conductors shall not be less than ____ per ent of the rated current of the capacitor..04

          

  230. (424-36) Conductors located above a heated ceiling shall be considered as operating in an ambient temperature of ____ C.Weatherproof

          

  231. (430-52(C)(1) Which is the highest rated motor of the following? A) 25 horsepower synchronous 3-phase 460 volts; b) 20 horsepower 3-phase 460 volts; c) 15 horsepower, 3-phase, 460 volts; or d)3 horsepower 120 volts?3 horsepower 120 volts