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229 True/False questions

  1. Where does NEC list the types of insulation material deemed acceptable in wet locations?NEC 310.8

          

  2. Explain the proper way to ground a subpanel in the same building.To ground a subpanel in the same building, run a four-wire system from main panel to subpanel.

          

  3. Which NEC Article covers grounding?NEC Article 250

          

  4. NEC maintains no ampacity requirements for fixture wiring because all fixtures undergo the UL approval process. (True or False)Receptacles must be installed on a peninsula when the peninsula's long edge is at least 24in. and its short edge is at least 12in.

          

  5. NEC Article 426 recognizes which three kinds of heating systems?Resistive, impedance, and skin effect.

          

  6. A 12-foot hallway requires one receptacle to meet code. (True or False)True, One is required, Two are suggested.

          

  7. Give guidelines for using sheet metal screws as bonding agents.sledge hammer, hammer drill, and ground rod pounders

          

  8. What is the service drop distance, in feet, of a 200-amp service crossing residential property?12ft.

          

  9. A transformer has a voltage ratio of 8:1 and an input of 120V. What is the output Voltage?1. Branch circuit in which the initial run is encased in AC up to the first receptacle, which is mounted in a plastic box.
    2. Branch circuit in which the initial run is encased in AC up to the first receptacle, which is mounted in a metal box.
    3. clothes closet measuring more than 10 sq ft.

          

  10. NEC Article _____ addresses bonding requirements in healthcare facilities.NEC Article 358 covers EMT.

          

  11. A circuit has a source of 10V and a resistance of 2hm. A fuse in this circuit should have what value?Using ohms law, the fuse value would be 10V/2ohms or 5 amperes. However, if the voltage increased slightly and harmlessly, the fuse would blow. Therefore the fuse should be based on the nature of the load.

          

  12. What factor determines circuit size?NEC Article 392

          

  13. The process of equipment _____ exposes current-carrying parts to a grounding system.A Direct burial clamp is needed to properly connect number 4 copper to a ground rod.

          

  14. A garage door opener is considered an appliance for NEC purpose. (True or False)True, Per NEC 422.31

          

  15. A circuit that cannont cause a fire in a hazardous condition is called a(n) _____ system.An Intrinsically Safe System.

          

  16. Which NEC Section covers equipment grounding conductors.NEC Section 250-118

          

  17. In NEC terms, what does the phrase in sight mean?Visible and within 50 ft.

          

  18. A whirlpool tub requires GFCI protection. (True or False)Per NEC 680.90(A), GFCI protection Must reside on whirlpool tubs.

          

  19. According to NEC, trees are approved service conductors. (True or False)Per NEC 100, Property owners can act as their own "Authority Having Jurisdiction" (AHJ)

          

  20. In the standard U.S. system of wire sizes, from No.50 through No.4/0, the lower the number the _____ the wire.The thicker the wire. Gauge was designed to reflect the number of wires that can fit through an opening.

          

  21. Current always flows from negative to positive. (True or False)True, Per NEC Article 400, only when rated for wet areas.

          

  22. The maximum operating temperature of type FFH-2 fixture wiring is?Per NEC 402.3, FFH-2 fixture wiring is useable up to 75 degrees C

          

  23. All metallic boxes and components must be grounded unless a grounding conductor is absent. (True or False)A grounding conductor is a conductor or circuit of a wiring system to a grounding electrode (ground rod).

          

  24. Name 3 situations AFCI protection is required.1. Branch circuit in which the initial run is encased in AC up to the first receptacle, which is mounted in a plastic box.
    2. Branch circuit in which the initial run is encased in AC up to the first receptacle, which is mounted in a metal box.
    3. clothes closet measuring more than 10 sq ft.

          

  25. When bonding a plumbing system to the electrical system, it is not necessary to jump the water meter as this connection is built into the meter. (True or False)A gounding system is connected to the ground or to a conductive body that extends the ground connection.

          

  26. The required clearance for a 400-amp service drop across a major roadway is?18ft.

          

  27. What three areas of a residence require 20-amp circuits?A device designed to trip when an overcurrent is detected.

          

  28. In electric circuits, a load usually converts electrical energy to _____, _____, or _____.Heat, Magnetism, and Light

          

  29. How would demand be calculated in a commercial environment in which a branch circuit could effectively handle 20 KW?Per NEC 220.13, use 100% of the first 10KW and 50% of the demand above 10KW. In this case, the demand factor would be 10,000 plus half the remaining 10,000 or 15,000W

          

  30. It is possible to violate the NEC by tightening a bolt or fastener too tight. (True or False)True, all equipment must be installed per manufacturer's instructions and specifications, The apparatus is void and violates NEC if this is not done.

          

  31. A lighting circuit in more than one room is acceptable electrical practice. (True or False)True

          

  32. What new code is needed for protection in all habitable spaces?According to new codes, ARC fault protection is needed many additional parts of the house.

          

  33. Which of the following is considered a service ground?
    1. water pipe
    2. ground rod(s)
    3. ceramic well housing
    4. chain link fence post
    NEC 250.114

          

  34. What is meant by the phrase shall be?A mandatory act or condition

          

  35. What determines the severity of an electrical shock?A device designed to trip when an overcurrent is detected.

          

  36. According to NEC 230.9(A), an unsheathed service conductor must be _____ft. from a window that opens.3ft.

          

  37. What NEC table would you go to to find trade size of conduit and raceway size?Chapter 9, Table 4 outlines trade size of conduit as well as raceway size.

          

  38. A tree over 50 ft. high may be used as an overhead service support for a single-story residence only. (True or False)NEC requires a minimum of 3 watts per residential sq ft. The kitchen may require more for better lighting.

          

  39. The requirements for liquid-filled transformers are the same regardless of the liquid used in the transformer. (True or False)True, motors convert electricity to rotational motion, while generators convert rotary motion to electricity.

          

  40. A grounding conductor is what color?A bonding screw is green.

          

  41. Annex _____ of NEC covers conduit fill.Annex C of NEC covers conduit and tubing fill for conductors and fixture wire fill.

          

  42. NEC Article _____ outlines the restrictions for using plastic junction or device boxes.NEC Section 250.118(5)

          

  43. NEC Article ______ defines breakers and fuses.According to NEC Article 100, a device that opens and closes a circuit by nonautomatic means automatically closes for a predetermined overcurrent.

          

  44. On a 400-amp services, how many ground rods are required?2 ground rods 6 ft apart.

          

  45. NEC Tables 310-10 through 310-21 provide information on.Definitions

          

  46. What are NEC requirements for a receptacle on a peninsula?Receptacles must be installed on a peninsula when the peninsula's long edge is at least 24in. and its short edge is at least 12in.

          

  47. NEC requires a panelboard circuit directory. (True or False)True, although there are exceptions.

          

  48. What is the NEC definition of a circuit breaker?A device designed to trip when an overcurrent is detected.

          

  49. NEC section 250-28A provides information on what material can be used for a main bonding jumper. (True or False)Equipment fastened or connection between metal parts.

          

  50. Which NEC reference identifies wire sizing and the temperature a wire can handle in amps?The size of the largest conductor determines what size ground wire used on a service.

          

  51. In a given NEC section, Subsection (2) contains _____.Terms and Definitions

          

  52. The larger the diameter of a piece of wire, the _____ its AWG value.Is dedicated to the sizes of the grounding conductor

          

  53. NEC Table 250.66 applies to the derived conductors of separately derived AC systems. (True or False)Resistive, impedance, and skin effect.

          

  54. NEC Chapter 9, Table 4, states,For a raceway to be used. Find a value for area larger than the raceway area calculated previously.

          

  55. Electricians should put grounded conductors on yellow reciprocal screws? (True or False)True, An attic with a furnace requires a receptacle to honor safety and sound wiring requirements.

          

  56. Where a main bonding jumper or a system bonding jumper is a screw only, the screw shall be identified with a _____ finish that shall be visible with the screw installed.Green finish

          

  57. NEC Section 250-118 states that a grounded conduct must run _____ flexible conduit.inside

          

  58. Current is measured in _____.amperes, named after the French scientist, Andre Marie Ampere

          

  59. Per NEC Article 410, luminaires may mount on drop-ceiling tiles. (True or False)False, ceiling tiles are never appropriate device support.

          

  60. Discuss the proper way to ground a subpanel in another building.A grounded conductor is a system or circuit that is intentionally grounded.

          

  61. Branch circuits must be loaded equally in terms of wattage per unit area. (True or False)True, Per NEC 210.11

          

  62. NEC Table _____ covers grounding electrode conductor sizing.NEC Table 250.66

          

  63. The smaller kitchen counter requiring a receptacle is _____ inches.True, An attic with a furnace requires a receptacle to honor safety and sound wiring requirements.

          

  64. Along a wall space, a first outlet should be no more than _____ feet from a door.6ft

          

  65. Describe a grounding conductor.In a parallel circuit, each load is connected in a separate path. In a circuit schematic, the branch lines are parallel.

          

  66. What is the proper way to test conduit for proper grounding?To test conduit for proper grounding, check ohms or use 120V receptacle and touch to ground to check for voltage.

          

  67. A voltage of 1V applied across a 1ohm resistance produces a 1amp current. If the voltage is doubled and the resistance is halved, the current does what?The current stays the same cause the doubling is offset by the halving.

          

  68. A _____-amp breaker goes on a 12 AWG wire.Although a 15amp breaker is above code, it is preferable when considering expansion.

          

  69. Why do stoves require a four-wire system?Two outside ground wire are needed on a 400 amp.

          

  70. When installing a cable tray, only the sections nearest the terminations must be grounded. (True or False)Per NEC 225.34, a maximum of six disconnects are allowed per service entrance.

          

  71. Outdoor lighting installations exceeding _____ are subject to the clearance requirements outlined in NEC 225.7Covers clearances on buildings.

          

  72. In a multiphase system in which one phase is used as a single-phase source, which conductor serves as ground?Per NEC 250.26, The Neutral conductor serves as ground.

          

  73. An electrician can safely recess a panel board into a flammable wall. (True or False)False, NEC 312.3, disallows recessing panels in flammable walls.

          

  74. NEC Section 300-13 provides information on?Mechanical and Electrical continuity conductors.

          

  75. NEC Table 220.42 can be used to calculate lighting loads in a restaurant dining area. (True or False)NEC Table 250.66

          

  76. According to good engineering practice, a sump pump requires a dedicated circuit.True, like a refrigerator the appliance should continue running when another component fails, the grounding system must be able to support the service on its own.

          

  77. If you have 750 watts total in bulbs, how many amps is it at 120V?6.25amps, 750 watts divided by 120V is 6.25amps

          

  78. An attic with a furnace requires a receptacle. (True or False)True, An attic with a furnace requires a receptacle to honor safety and sound wiring requirements.

          

  79. The requirements for burying 240V conductors are found in NEC _____.Equipment Bonding Jumpers

          

  80. All new wiring receptacles must be grounded to a neutral bar in the panel box. (True or False)True, Receptacles fed from subpanels must have their equipment grounding bar that is electrically isolated from the neutral bar.

          

  81. NEC Section 250-134 provides information on what topic?Equipment fastened or connection between metal parts.

          

  82. What does NEC Section 250-28A require?A main bonding jumper and a system bonding jumper.

          

  83. How does an NEC violation affect the occupancy of an existing installation?Per NEC 90.4, 510.2, and various local codes, occupancy is permitted in the event of a code violation as long as the occupancy remains unchanged and no hazardous condition exists.

          

  84. Using NEC Section 250-8, identify five methods of making connections.1. Listed Pressures Connectors
    2. Terminal Bars
    3. Pressure Connectors Listed As Ground and Bonding Equipment
    4. Exothermic Welding
    5. Machine screw-type fasteners that engage not less than two threads or are screwed with nuts

          

  85. What does it mean when a receptacle has "NEMA 5-20R" on it?A receptacle with NEMA 5-20R on it has an amperes rating of 20, will take a NEMA-5-15P or NEMA-5-20P plug, and has a voltage rating of 125.

          

  86. Name some tools for installing ground rods.A grounding conductor is a conductor or circuit of a wiring system to a grounding electrode (ground rod).

          

  87. Define the term grounding conductor.A grounding conductor is a conductor or circuit of a wiring system to a grounding electrode (ground rod).

          

  88. Extension cords are acceptable in wet areas. (True or False)True, Per NEC Article 400, only when rated for wet areas.

          

  89. NEC Chapters 1-4 governs basic practices in effect in hazardous areas, except as modified by specific requirements outlined in NEC Chapter _____.Chapter 5

          

  90. The most important aspect of becoming an electrician is learning about _____.Safety is the most important aspect of an electrician's job.

          

  91. The negative terminal of a battery has a surplus of protons.(True or False)True, Electricians may use rebar as a grounding means.

          

  92. Appliances with motors over 0.125 hp must have a separate means of disconnect. (True or False)False, No disconnect is required.

          

  93. When running new work over old, hanging a second support from a primary support is acceptable practice. (True or False)True, Per NEC 300.11 hanging a second support when running new over old is acceptable and a common practice.

          

  94. Which NEC articles cover the installation requirements for RMC, IMC, and EMT?NEC Section 250-119 1-14

          

  95. It is proper procedure to install an exhaust fan and light in a shower area. (True or False)False, unless it is 8ft above the rim of the shower zone and listed for wet environments.

          

  96. How many cubic inches does each wire take for:
    14 gauge ________.

    12 gauge ________.

    10 gauge ________.
    14 gauge; 2

    12 gauge; 2.25

    10 gauge; 3

          

  97. When establishing ground clearance in new construction. It is best to make the ground clearance slightly more than the NEC-stated requirement to provide a margin for error. (True or False)Per NEC 392.7(B) Bonding of all cable tray sections is required.

          

  98. Which of the following lacks insulation properties? Rubber, Air, Water, Mica, PaperAir, does not conduct electricity.

          

  99. What is proper phase arrangement when wiring a three-phase panelboard?Per NEC 450.3, phases must arrange in a particular order: A, B, C, from left to right or from top to bottom as seen from the front.

          

  100. When an ammeter is connected in parallel with a load, ______.Damage may occur in the meter and or personal injury.

          

  101. ampere"the current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating"

          

  102. ______ are the subject of NEC Section 680-20.Bonding jumpers

          

  103. Insulators like air, paper or rubber prevent arcing. (True or False)False, Arcing is the phenomenon in which electrons jump across insulators to positive terminals, which can occur through air, paper, rubber, or any other insulator.

          

  104. What demand factor applies when calculating loading requirements for an apartment building with 21 units? A building with over 100 units?Per NEC 220.84, A 21 unit building would be rated at 32% and any occupancy over 62 units rated at 23%

          

  105. NEC Articles _____ and _____ covers metallic and non-metallic raceways in buildings.NEC Table 250.66

          

  106. On a 200-amp service, the electrician should use _____ or _____ size grounded conductor in the service cable.2/0 or 4/0

          

  107. FMT conductors are appropriate for battery storage areas. (True or False)False, Per 360.12, FMT is disallowed from battery storage areas

          

  108. Name the methods of sizing bonding jumpers outlined in NEC Section 250-28D.1. Bonding jumper is sized not less than 12.5% of the largest phase conductor.

    2. Based on the largest ungrounded service conductor.

    3. Based on the largest sum of the service conductors.

          

  109. What is the approach for determining the number of receptacles on a 20-amp circuit?Is dedicated to the sizes of the grounding conductor

          

  110. A finished basement should have GFCI protection.Although not required by NEC, in general any receptacles below grade, including those in finished basements, should be GFCI protected. Receptacles in dwelling accessory building with floors at or below grade level require GFCI protection. unfinished basements require GFCI-protected receptacles.

          

  111. Voltages of _____ or more are considered high.120V

          

  112. In front of a panel from floor to ceiling, how much clearance depth is needed?6.25amps, 750 watts divided by 120V is 6.25amps

          

  113. A bonding screw is what color?A bonding screw is green.

          

  114. NEC 90.1(A) states that the purpose of NEC is the "practical safeguarding of _____ from hazards arising from the use of electricity".people and property

          

  115. Define a grounding system according to NEC.A gounding system is connected to the ground or to a conductive body that extends the ground connection.

          

  116. Which NEC article covers service drops?"the current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating"

          

  117. When local ordinance superseded or administers NEC, NEC uses what phrase?"Authority Having Jurisdiction (AHJ)"

          

  118. In terms of AWG, what is the minimum grounding conductor size permitted?NEC Section 250-118

          

  119. NEC Chapter _____ specifies conduit fill requirements for fiber-optic cabling.Chapter 9

          

  120. The calculations for protecting motor circuits are the same as those for non motor circuits. (True or False)Per NEC 402.3, FFH-2 fixture wiring is useable up to 75 degrees C

          

  121. What is the maximum number of sets of service conductors a service drop or lateral may supply?A device designed to trip when an overcurrent is detected.

          

  122. Which of the following NEC sections outlines which air-conditioning systems requires no grounding?Terms and Definitions

          

  123. Which NEC sections covers identification of equipment grounding conductors?A grounding conductor is a conductor or circuit of a wiring system to a grounding electrode (ground rod).

          

  124. Which NEC tables(s) cover(s) the fill of metal boxes?The fill of metal boxes appears in NEC Tables 314.6 A and B.

          

  125. NEMA stands for National Electrical Manufacturers AssociationTrue - NEMA is the acronym for National Electrical Manufacturers Association.

          

  126. A(n) _____ circuit is designed and created for one load.Dedicated

          

  127. All voltages in a circuit are referenced to Earth ground via a black wire. (True or False)False, via a green wire

          

  128. Service drops must be installed so as to be "readily accessible." (True or False)False, Per NEC 230.24, Service drop connectors shall not be readily accessible.

          

  129. Overcurrent insufficient to trip a breaker can prove hazardous under the right conditions. (True or False)1. Air-borne Particulate
    2. Sawdust

          

  130. The organization that sponsors the NEC, is the _____.The National Fire Protection Association (NFPA) sponsors the NEC

          

  131. NEC Section 250-102 is devoted to equipment _____.Mechanical and Electrical continuity conductors.

          

  132. A receptacle or a switch with 14-2 entering it counts as _____ cubic inches.Each receptacle or switch counts as 2 conductors, and 14 AWG wire conductors require 2 cu.in. each. Therefore, 2 conductors x 2 cu.in. = 4 cu. in. Add to this 2 for the yoke and 2 for the ground for a total 0f 8 cu.in.

          

  133. What is the topic of NEC Section 250-122?Exothermic welding involves the fusion of metal materials or copper to rebar.

          

  134. NEC Chapter 9, Table 5, states,To locate wire type and size to be installed. Repeat for each conductor, keeping a running total. Derate by 40% to ge the total raceway area.

          

  135. Leads to an unused current transformer should be.NEC Article 358 covers EMT.

          

  136. Using aluminum wire with receptacles must be _____.Marked CO/ALR

          

  137. What Section discusses "clearance(s) from ground.Breaker Rating determines ampacity, or size, of a circuit.

          

  138. NEC _____ outlines the requirements fo AC type (armored) cable.NEC 320

          

  139. A switch should be _____ high off the floor?Two outside ground wire are needed on a 400 amp.

          

  140. Voltage can be fatal to a person. (True or False)False, Current is fatal to people not Voltage

          

  141. NEC Section _____ oversees bonding of flexible type conduit.Equipment fastened or connection between metal parts.

          

  142. Differentiate between AC and DC.NEC Article 358 covers EMT.

          

  143. Which NEC article covers cable trays?NEC Article 392

          

  144. Identify four parties who should be satisfied with the electrical work in a new residence.1. The Builder
    2. Homeowner
    3. Inspector
    4. Boss

          

  145. IN NEC 2008, what does Table 370.6A cover?Shows in two columns (milimeters and inches), how many wires in trade size you can place in a box.

          

  146. Explain the process of cad welding?In a parallel circuit, each load is connected in a separate path. In a circuit schematic, the branch lines are parallel.

          

  147. Underground service is simpler to troubleshoot and repair than overhead service? (True or False)To ground a subpanel in the same building, run a four-wire system from main panel to subpanel.

          

  148. The "3-ft. rule" for clearances around things like control panels is adequate. (True or False)NEC Section 250-126

          

  149. All electrical equipment and supplies should be considered _____ until determined otherwise.active or live

          

  150. Property owners can act as their own AHJs. (True or False)True, motors convert electricity to rotational motion, while generators convert rotary motion to electricity.

          

  151. The NEC defines ampacity as,"the current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating"

          

  152. Air-conditioning units, hot water heaters, and baseboard heat require a four-wire system? (True or False)Deicing systems

          

  153. When installing an autotransformer, it is important to remember to insert an OCPD in series with the shunt winding. (True or False)An isolated grounded reciprocal is a separate ground from a device directly to a panel.

          

  154. A ground ring encircling a building or structure, in direct with the earth consisting of at least _____ft. of bare copper not smaller than _____ AWG, shall be permitted as an electrode.A grounding conductor is green.

          

  155. Name a common application for high impedance grounding.High impedance grounding is used for grounding radio towers. NEC 250.20(E)

          

  156. NEC Article _____ address EMT.Is a measure of the amount of electric charge passing a point in an electric circuit per unit time.

          

  157. A subpanel requires a bonding screw? (True or False)False, A bonding screw is unneeded in a subpanel.

          

  158. Disconnects and switches used with appliances must indicate, on their switches, the on- and off-positions. (True or False)Each receptacle or switch counts as 2 conductors, and 14 AWG wire conductors require 2 cu.in. each. Therefore, 2 conductors x 2 cu.in. = 4 cu. in. Add to this 2 for the yoke and 2 for the ground for a total 0f 8 cu.in.

          

  159. Which NEC chapter discusses fixture wiring and fixture wires.A main bonding jumper and a system bonding jumper.

          

  160. Name two hazards found in a Class III hazardous environments.A gounding system is connected to the ground or to a conductive body that extends the ground connection.

          

  161. NEC allows electricians to ground gas pipes to existing, grounded water pipes. (True or False)True, Receptacles fed from subpanels must have their equipment grounding bar that is electrically isolated from the neutral bar.

          

  162. The standard length for IMC is?In a parallel circuit, each load is connected in a separate path. In a circuit schematic, the branch lines are parallel.

          

  163. The main ground on a service is a(n) _____.Ground Rod

          

  164. When a service entrance wire is under at least 2 in. of concrete, a disconnect is required between meter base and panel. (True or False)Chapter 9, Table 4 outlines trade size of conduit as well as raceway size.

          

  165. Open conductors belonging to separate circuits must be separated by?Per NEC 225.14, separated by 4in.

          

  166. _____ and ______ are two types of electrical faults.Ground and Arc are two types of electrical faults.

          

  167. How many watts should be allocated per square foot in a residence?NEC requires a minimum of 3 watts per residential sq ft. The kitchen may require more for better lighting.

          

  168. Motors and generators work the same way. (True or False)Per NEC 680.90(A), GFCI protection Must reside on whirlpool tubs.

          

  169. Bonding is the establishment of ______ connection between metal parts.120V

          

  170. Electricians may use rebar as a grounding means. (True or False)True, An attic with a furnace requires a receptacle to honor safety and sound wiring requirements.

          

  171. Which NEC Section covers ground terminal identification.Chapter 3

          

  172. The major cause of death from electrical shock is _____.Heart fibrillation is the major cause of death from electrical shock. The shock disrupts the normal electrical brain to heart signals.

          

  173. A(n) _____ acts as a fuse, but is usually resettable.Circuit Breaker

          

  174. In a three-phase delta system, the leg with the highest voltage must be _____.Identified as the "B" leg

          

  175. What kind of information does NEC Section 250-66 cover?Covers the sizes of alternating current grounding electrode conductors.

          

  176. Threaded pipe can be used for bonding purposes? (True or False)True (NEC 250.92B)

          

  177. Electricians must use a(n) _____ to properly connect number 4 copper to a ground rod.To test conduit for proper grounding, check ohms or use 120V receptacle and touch to ground to check for voltage.

          

  178. When is building steel permitted in an electro grounding system?A device designed to trip when an overcurrent is detected.

          

  179. The Panel Board requirements for Application in Construction appear in NEC Article?Safety is the most important aspect of an electrician's job.

          

  180. When using 500 MCM, _____ or ______ size ground wire is appropriate on a 400-amp service.350MCM or 400MCM

          

  181. In NEC, Table _____ provides the sizing of grounding electrode conductors.NEC Table 250.66

          

  182. Small power tools are protected in what two ways?A bonding screw is green.

          

  183. A circuit using 2 amps of current with 12V applied dissipates how much current?Given that power equals voltage times resistance, power in this example is 24 watts (2amp x 12V)

          

  184. Typically, transformers are available in one of two types: _____ and _____.True, Per NEC Article 400, only when rated for wet areas.

          

  185. Something that is ______ is connected to ground or to a conductive body that extends the grounding connection.NEC Table 250.66

          

  186. A TVSS provides adequate protection against lighting strikes. (True or False)False, a TVSS is only for protecting against predictable anomalies, and short-duration spikes of high-voltage.

          

  187. What is meant by the term isolated grounded reciprocal?An isolated grounded reciprocal is a separate ground from a device directly to a panel.

          

  188. Describe the process for bonding three 200-amp disconnects to make a proper grounding system.To make a proper grounding system using three 200-amp disconnects, use a ground wire of sufficient size to go from panel to panel with a lug, screw, or ground bar, if provided.

          

  189. _____ determines what size ground wire used on a service.The size of the largest conductor determines what size ground wire used on a service.

          

  190. Resistance is generally used to convert energy from one form to another. (True or False)True

          

  191. Per NEC 450.3, when a transformer is enclosed, install _____ fuses at the transformer's primary.OCPD

          

  192. What is the subject of NEC Section 250-2D?Is dedicated to the sizes of the grounding conductor

          

  193. The way to ground a transformer in a commercial building is to place a grounding rod inside the building? (True or False)False, The way to ground a transformer in a commercial building is to place a grounding rod outside or beneath the building.

          

  194. Nameplates that rate protective devices describe which of the following?16 in.

          

  195. NEC allows how many disconnects per service entrance?Per NEC 225.34, a maximum of six disconnects are allowed per service entrance.

          

  196. Which NEC guidelines guarantee the best workmanship and safest installations possible.According to new codes, ARC fault protection is needed many additional parts of the house.

          

  197. A 10 AWG wire carries how many amps? (What size breaker?)A bonding screw is green.

          

  198. NEC Article 100 is dedicated to?NEC Article 358 covers EMT.

          

  199. A metal fence should be attached to a ground rod?Per NEC 250.116 ground rods should attach to metal fences

          

  200. Installation of a floor drain in a vault intended for wet transformer(s) is ______.NEC 110.23 states that, "Unused current transformers associated with potentially energized circuits shall be short circuited."

          

  201. In what sections does NEC outline the requirements for appliance calculations?NEC Section 250-119 1-14

          

  202. Explain where and why isolated systems are used.Isolated systems are used in healthcare facilities due to explosive gases.

          

  203. Above sidewalks accessible by pedestrians, a service drop not over 600V must be at least _____ft. high.10ft.

          

  204. NEC Article 526 helps electricians determine requirements for _____.NEC Article 517

          

  205. A(n) _____ is the fundamental particle of electricity.Electron

          

  206. Which of the following is not a conductor? Gold, Silver, Copper Water, Air.Air, does not conduct electricity.

          

  207. Equipment grounding conductor _____ is (are) discussed in NEC Section 250-130.Electrical installations at permanently installed pools.

          

  208. Is a receptacle needed close to an air-conditioning unit? If so, how close must it be?Yes, a receptacle is required in close proximity to an air-conditioning unit. At most, it must be 25ft. distant.

          

  209. Voltage strengthens as a negative terminal becomes crowded with electrons. (True or False)False, via a green wire

          

  210. NEC defines "Bonding" as,To locate wire type and size to be installed. Repeat for each conductor, keeping a running total. Derate by 40% to ge the total raceway area.

          

  211. Fusing the load side of a transformer sufficiently protects the transformer. (True or False)False, Fuses on the load side do not protect the transformer.

          

  212. ampacityThe maximum amount of electrical current a conductor or device can carry before sustaining immediate or progressive deterioration.

          

  213. What is an outlet?Is a measure of the amount of electric charge passing a point in an electric circuit per unit time.

          

  214. Shoulder fittings with locknuts are allowable as bonding devices? (True or False)False, A bonding screw is unneeded in a subpanel.

          

  215. System and circuit grounding involves taking alternating current to ground? (True or False)True

          

  216. As the diameter of wire increases, resistance to flow increases. (True or False)False, the smaller the diameter increases resistance to flow.

          

  217. A receptacle should be how high off the floor?16 in.

          

  218. What is the proper procedure for bonding a motor conduit with metal flex?True (NEC 250.92B)

          

  219. Define a parallel circuit?In a parallel circuit, each load is connected in a separate path. In a circuit schematic, the branch lines are parallel.

          

  220. Describe the information covered in NEC Article 230.9 (A)A grounding conductor is a conductor or circuit of a wiring system to a grounding electrode (ground rod).

          

  221. In electrical work, electrons are always balanced between two points. (True or False)True (NEC 250.92B)

          

  222. A home has dimensions of 28 x 52 ft., which includes a 28 x 12 ft. garage. What is the home's total living area in square feet?Per NEC 250.116 ground rods should attach to metal fences

          

  223. Why do dryers require a four-wire system?Two hots are needed to operate the stove neutral. The timers and clocks can serve as ground for tripping mechanism.

          

  224. If you have 1,800 watts for baseboard heat, at 240V how many amps are there?7.5amps, 1,800 watts divided by 240V is 7.5amps

          

  225. When NEC Article 100 describes "Feeder" as.NEC Article 392

          

  226. What is the difference between NFPA 70 and NEC?Is dedicated to the sizes of the grounding conductor

          

  227. Grounding reduces the voltage that might cause a fatal electrical shock by allowing excess current to flow to the ground. (True or False)True

          

  228. Why is M/C cable required in a cupboard instead of Romex?A mandatory act or condition

          

  229. General-purpose enclosures are NEC approved for intrinsically safe apparatuses. (True or False)Receptacles must be installed on a peninsula when the peninsula's long edge is at least 24in. and its short edge is at least 12in.