05 NEC quiz 150                                                                                                   www.garyklinka.com



1.  Print these pages.

2.  Circle the correct answers

3.  Use the 2005 NEC Code book.

4.  Page down to the last page for the verification forms and mailing instructions.


1. When an underground metal water-piping system is used as a grounding electrode, effective bonding must be provided around insulated joints and around any equipment that is likely to be disconnected for repairs or replacement. Bonding conductors must be of ______ to permit removal of such equipment while retaining the integrity of the bond.

             a) stranded wire                                                        

 b) flexible conduit

             c) sufficient length                                        

 d) none of these

                        250.68 (B)

2. Cases or frames of instrument transformers are not required to be grounded ______.

a)      when accessible to qualified persons only

b)      for current transformers where the primary is not over 150 volts-to-ground and that are used exclusively to supply current to meters.

c)      For potential transformers where the primary is less than 150 volts-to-ground

d)     A or B

                        250.172 and Ex

3.  Circuit conductors or that operate at 277v (with 600v insulation) may occupy the same enclosure or raceway with 48V dc conductors that have an insulation rating of 300v.

a) True                                                

b) False

                        300.3 (C)(1)

4.  What is the minimum cover requirement in inches for UF cable supplying power to a 120V, 15A GFCI-protected circuit outdoors under a driveway of a one family dwelling?

a) 12 in.          

b) 24 in.          

c) 16 in.          

d) 6 in.

                        Table 300.5, Column 4

5.  Where circuit conductors are spliced within a box, or terminated on equipment within or supported by a box, any equipment grounding conductors associated with those circuit conductors must be spliced or joined in the box or to the box with the devices suitable for the use. This does not apply to insulated equipment grounding conductors for isolated equipment grounding conductors for isolated ground receptacles for electronic equipment.

a) True                                                                        

b) False

                        250.148 Ex

6.  Wiring methods permitted in the hung ceiling area used for environmental air include ______.

a) electrical metallic tubing                                        

b) flexible metal conduit of any length

c) rigid metal conduit without an overall nonmetallic covering

d) all of these

                        300.22 (C)(1)

7.  A 100 ft. vertical run of 4/0 AWG copper requires the conductors to be supported at ______ locations.

a) 4                 

b) 5                 

c) 2                 

d) none of these

                        Table 300.19(A)          

8.         A grounding-type receptacle can replace a nongrounding-type receptacle at an outlet box that does not contain an equipment grounding conductor if the equipment grounding conductor is connected to the ______.

a) grounding electrode system as described in 250.50

b) grounding electrode conductor

c) equipment grounding terminal bar within the enclosure where the branch circuit for the receptacle originates

d) any of these

                        250.130 (C) (1)

9.  A TVSS device must be listed.

a) True                                                            

b) False


10.  An equipment bonding jumper for a grounding-type receptacle must be installed between the receptacle and a flush-mounted outlet box, even when the contact device is listed as self-grounding.

a) True                                                            

b) False

                        250.146 (B)

11.  Backfill used for underground wiring must not ______.

a) damage the wiring method                                    

b) prevent compaction of the fill

c) contribute to the corrosion of the raceway            

d) all of these


12. Bonding jumpers must be used around ______ knockouts that are punched or otherwise formed so as to impair the electrical connection to ground. Standard locknuts or bushings cannot be the sole means for this bonding.

a) concentric                                                               

b) eccentric

c) field-punched                                                         

d) a or b

                        250.92 (B)

13.  Ceiling- support wires used for the support of electrical raceways and cables within nonfire  rated assemblies are required to be distinguishable from the suspended-ceiling framing support wires.

a) True                                                                        

b) False

                        300.11 (A)(2)  

14.  Conductors in raceways must be ____ between outlets, boxes, devices, and so forth.

a) continuous                                                  

b) installed


d) in conduit


15.   Direct buried conductors, cables, or raceways, which are subject to movement by settlement or frost, must be arranged to prevent damage to the ______ or to equipment.

a) siding of the building mounted on            

b) landscaping around the cable or raceway

c) the enclosed conductors                            

d) expansion fitting


16. Each current-carrying conductor of a paralleled set of conductors must be counted as a current-carrying conductor for the purpose of applying the adjustment factors of 310.15(B)(2)(a).

a) True                                                            

b) False

                        310.15(B)(2) (a)

17. Electrical installations in hollow spaces, vertical shafts, and ventilation or air-handling ducts must be made so that the possible spread of fire or products of combustion will not be ______.

a) substantially increased                               

b) allowed

c) inherent                                                      

d) possible


18. Equipment bonding jumpers must be of copper or other corrosion-resistant material. A bonding jumper must be a _____ or similar suitable conductor.

a) wire                        

b) bus                         

c) screw                      

d) any of these


19. Fittings and connectors must be used only with the specific wiring methods for which they are designed and listed.

a) True                                                                        

b) False


20.  In both exposed and concealed locations, where a cable or nonmetallic raceway-type wiring method is installed parallel to framing members such as joists, rafters, or studs or furring strips, the nearest outside surface of the cable or raceway must be ______ the nearest edge of the framing member where nails or screws are likely to penetrate.

a) not less than 1 ¼ in. from                                      

b)immediately adjacent to

c) not less than 1 1/16 in from                                   

d) 90º away from


21. Liquidtight flexible metal conduit (LFMC) up to ½ in. trade size can be used as the equipment grounding conductor if the length in any ground return path does not exceed 6 ft. and the circuit conductors contained in the conduit are protected by overcurrent devices rated at ______ or less when the conduit is not installed for flexibility.


b) 20A                        




22. Metal enclosures and raceways for other than service conductors must be grounded except as permitted by 250.112(I).

a) true                         

b) false


23. Metal gas piping can be considered bonded by the circuit’s equipment grounding conductor that is likely to energize the piping.

a) true                         

b) false


24. Metal raceways, enclosures, frames, and other noncurrent-carrying metal parts of electric equipment installed on a building equipped with a lightning protection system may require spacing from the lightning protection conductors, typically 6 ft. through air or ____ through dense materials, such as concrete, brick, wood, etc.

a)  2 ft.                                   

b) 3 ft.                        

c) 4 ft.                        

d) 6 ft.


25.  Metric designators and trade sizes for conduit, tubing, and associated fittings and accessories are designated in Table ____.

a) 250.66                    

b) 250.122                  

c) 300.1                      

d) 310.16


26. Nonmetallic raceways, cable trays, cablebus, auxiliary gutters, boxes, and cables with a  nonmetallic outer jacket must be made of material approved for the condition and where exposed to sunlight, the materials must be ____.

a) listed as sunlight resistant                          

b) identified as sunlight resistant

c) both a and b                                                           

d) either a or b


27. Raceways must be ____  between outlet, junction, or splicing points prior to the installation of conductors.

a) installed complete                                                  

b) tested for ground faults     

c) a minimum of 80 percent completed                     

d) none of these


28.  Raceways, cable assemblies, boxes, cabinets, and fittings must be securely fastened in place. Support wires and associated fittings that provide secure support and that and that are installed in addition to the ceiling grid support wires are permitted as the sole support.

a) true                                                 

b) false


29.  Solid dielectric insulated conductors operated above 2,000V in permanent installations must have ____ insulation and must be shielded.

a) ozone-resistant       

b) asbestos      

c) high-temperature    

d) perfluoro-alkoxy


30.  The ____ is defined as the area between the top of direct-burial cable and the finished grade

a) notch                                  

b) cover                      

c) gap             

d) none of these

                        Table 300.5, Note 1

31.  The ____ rating of a conductor is the maximum temperature, at any location along its length, which conductor can withstand over a prolonged period of time without serious degradation.

a) ambient                  

b) temperature            

c) maximum withstand          


                        310.10 FPN No. 1

32. The conductor between a surge arrester and the line and the grounding connection must not be smaller that ____ AWG copper for installations operating at 1kV or more.

a) 4                             

b) 6                             

c) 8                 

d) 2


33. The equipment bonding jumper on the supply side of services (service raceway) must be sized according to the ____.

a) calculated load                                                       

b) service-entrance conductor size

c) service-drop size                                                    

d) load to be served


34. The general rule for equipment bonding jumpers installed on the outside of a raceway or enclosure is that they are not permitted to be longer that 6ft., but an equipment bonding jumper can be longer that 6ft/ at outside pole locations for the purpose of bonding or grounding isolated sections of metal raceways or elbows installed in exposed risers of metal conduit or other metal raceways.

             a) true                                                                        

             b) false   

                        250.102(E) Ex

35. The grounded circuit conductor is permitted to ground non-current-carrying metal parts of equipment, raceways, and other enclosures at the supply side or within the enclosure of the ac service-disconnecting means.

a) true                                                                         

b) false


36. The noncurrent-carrying metal parts of service equipment, such as ____, must be effectively bonded together.

a) service raceways, cable trays, or service cable armor

b) service equipment enclosures containing service conductors, including meter fittings, boxes, or the like, interposed in the service raceway or armor.

c) the metallic raceway or armor enclosing a grounding electrode conductor

d) all of these

                        250.92(A)(1),(2), and (3)

37. THW insulation has a ____ rating when installed within electric discharge lighting equipment, such as through fluorescent luminaires.

a) 60°              

b) 75°          

c) 90°           

d) none of these

                        Table 310.13

38. Type AC cable can be installed in ducts or plenums that are used for environmental air.

a) True                     

b) False


39. When ungrounded conductors are increased in size, the equipment grounding conductor is not required to be increased because it is not a current-carrying conductor.

a) True                     

b) False


40. Where ______________ conductors are run in separate raceways or cables, the same number of conductors must be used in each raceway or cable.

a) parallel          

b) control                

c) communication        

d) aluminum


41. Where a metal box is surface-mounted, direct metal-to-metal contact between the device yoke and the box is permitted to ground the receptacle to the box.  Unless the receptacle is listed as _____, at least one of the insulating retaining washers must be removed from the receptacle to ensure direct metal-to-metal contact between the device yoke and metal outlet box.

a) self-grounding      


c) metal contact sufficient 

d) isolated grounding


42. Where accessible only to qualified persons, a box or conduit body is not required for conductors in ______when installed in accordance with applicable Code provisions.

a) manholes             

b)handhole enclosures   

c) a or b   

d) elevator pits  


43. Where an equipment grounding conductor consists of a raceway, cable tray, cable armor, cablebus framework, or cable sheath, it must be installed _________.  

 a) in accordance with applicable Code provisions

 b) using fittings for joints and terminations approved for the use

 c) with all connections, joints, and fittings made tight using suitable tools

 d) all of these


44. Where corrosion protection is necessary and the conduit is threaded in the field, the threads must be coated with a(n) _____, electrically conductive, corrosion-resistance compound.

a) marked         

b) listed     

c) labeled         

d) approved


45. Where installed in raceways, conductors _____AWG and larger must be stranded.

a) 10          

b) 6        

c) 8            

d) 4


46. Where NM Cables pass through cut or drilled slots or holes in metal members, the cable needs to be protected by ____securely covering all metal edges fastened in the opening prior to installation of the cable.

a) listed bushings       

b) listed grommets     

c) plates          

d) a or b


47. Where portions of a cable raceway or sleeve are subjected to different temperatures and where condensation is known to be a problem, as in cold storage areas of buildings or where passing from the interior to the exterior of a building, the _____ must be filled with an approved material to prevent the circulation of warm air to a colder section of the raceway or sleeve.

            a) raceways      

b) sleeve               

c) a or b            

d) none of these                  


48. Where required to reduce electric noise for the electronic equipment, electrical continuity of the metal raceway is not required and the metal raceway can terminate to a(n)_______________ nonmetallic fitting(s) or spacer on the electronic equipment.

a) listed         

b) labeled        

c) identified                 

d) marked

                        250.96(B) and 300.10 Ex 2

49. Which conductor has an insulation temperature rating of 90° C?


b) RHW         

c) THHN          


                        Table 310.13

50. Which of the following appliances installed in residential occupancies need not be grounded?

a) toaster       

b) aquarium    

c) dishwasher         

d) refrigerator

                        250.114(3)(a) and (b)

 Necquiz150 part 2

1.   A permanently-mounted luminaire (fixture) in a commercial garage and located over lanes on which vehicles are commonly drive must be located not less than _____ above floor level.

a) 10 ft.                      

b) 12 ft.                      

c) 14 ft.                      

d) none of these


2.  A pool capable of holding water to a maximum depth of _____ is a storable pool.

a) 18 in.                      

b) 36 in.                      

c) 42 in.                      

d) none of these


3.  A pool light junction box that has a raceway that extends directly to underwater pool light forming shells must be located not less than _____ from the outdoor pool or spa.

a) 2 ft.                        

b) 3 ft.                        

c) 4 ft.                        

d) 6 ft.

                        680.24(A)(2)(b) and 680.24(B)

4.   A sealing fitting must be installed within _____ of either side of the boundary where a conduit leaves a Class 1, Division 1 location. The sealing fitting must be designed and installed so as to minimize the amount of gas or vapor within the Division 1 portion of the conduit being communicated beyond the seal.

a) 5 ft.                        

b) 6 ft.                        

c) 8 ft.                        

d)10 ft.


5.  A single receptacle is a single contact device with no other contact device on the same ______.

a) circuit                     

b) yoke                       

c) run                          

d) equipment

                        100 Receptacle

6.  A Solderless pressure connector is a device that ______ between two or more conductors or between one or more conductors and a terminal by means of pressure and without the use of solder.

a) provides access    

b) protects wiring   

c) is never needed    

d)establishes a connection

                        100 Connector, Pressure (Solderless)

7.  A standard circuit breaker mounted in a Class 1, Division 2 location with make-and-break contacts, and not hermetically sealed or oil-immersed, must be installed in a Class 1, Division 1 rated enclosure.

a) true                                                 

b) false


8.  A strut-type channel raceway is a metallic raceway intended to be mounted to the surface of, or suspended from, a structure with associated accessories for the installation of electrical conductors.

a) true                                                 

b) false


9.  A surface mount strut-type channel raceway must be secured to the mounting surface with retention straps external to the channel as intervals not exceeding _____ and within 3 ft. of each outlet box, cabinet, junction box, or other channel raceway termination.

a) 3 ft.                        

b) 5 ft.                        

c) 6 ft.                        

d) derating


10.  A surge arrester is a protective device for limiting surge voltages by _____ or bypassing surge current.

a) decreasing              

b) discharging            

c) limiting                   

d) derating


11.  A transfer switch is required for all fixed or portable optional standby power systems for building or structures for which an electric-utility supply is either the normal or standby source.

a) true                                                 

b) false


12.  A value assigned to a circuit or system for the purpose of conveniently designating its voltage class such as 120/240V is called _____ voltage.

a) root-mean square    

b) circuit                     


d) source

                        100 Voltage, Nominal

13.  A wall-mounted luminaire weighting not more than _____ can be supported to a device box with no fewer than two No. 6 or larger screws.

a) 4 lbs.                       

b) 6 lbs.                      

c) 8 lbs.                       

d) 10 lbs.

                        314.27(A) Ex

14. A(n) _____ I intended to provide limited overcurrent protection for specific applications and utilization equipment, such as luminaires and appliances. This limited protection is in addition to the protection provided by the required branch circuit overcurrent protective device.

a) supplementary overcurrent protective device        

b) transient voltage surge suppressor

c) arc-fault circuit interrupter                                     

d) Class A GFCI

                        100 Supplementary Overcurrent Protective Device

15.  AC circuit of less than 50V must be grounded if supplied by a transformer whose supply system exceeds 150 volts-to-ground.

a) true                                                 

b) false


16.  Additional services are permitted for different voltages, frequencies, or phases, or for different uses such as for _______.

a) gymnasiums                                   

b) different rate schedules

c) flea markets                                    

d) special entertainment events


17. Agricultural building where excessive dust and dust with water may accumulate, are defined as including all areas of _____ confinement systems, where litter dust or feed dust, including mineral feed particles may accumulate.

a) poultry                    

b) livestock                 

c) fish                         

d) all of these


18. All 125-vol, single-phase, 15 and 20 ampere receptacles installed in airecraft hangers in areas where ______ is (are) used must have ground fault circuit interrupter protection for personnel.

a) electrical diagnostic equipment      

b) electrical hand tools

c) portable lighting equipment           

d) any of these


19.  All 15 and 20A, 125 single-phase receptacles _____ of commercial occupancies must have GFCI protection for personnel. (answers on next page)

a) in bathrooms          

b) on rooftops            

c) in kitchens              

d) all of these

                        210.2(B)(1),(2), and (3)

20.  All 15 and 20A, 125V single-phase receptacles installed in pits, in hoistways, on elevator car tops, and in escalator and moving walk wellways must be _______.

a) on a GFCI-protected circuit   

b) of the GFCI type       

c) a or b          

d) none of these


21. All 15 and 20A, 125V single-phase general-purpose receptacles installed _____ of agricultural buildings must have ground-fault circuit-interrupter protection for personnel.

a) in areas having a equipotential plane         

b) outdoors

c) in dirt confinement areas for livestock      

d) any of these           


22. All 15, 20, and 30A, 125V, single-phase receptacle outlets used by personnel for temporary power must have ground-fault circuit-interrupter protection for personnel. GFCI protection can be incorporated into a ________ or other devices incorporating listed GFCI protection for personnel identified for portable use.

a) circuit breaker        

b) receptacle               

c) cord set                  

d) any of these


23. All accessible portions of abandoned CATV cable must be removed.

a) true                                                 

b) false


24. All accessible portions of abandoned communications cable must be removed.

a) true                                                 

b) false


25. All accessible portions of abandoned fire alarm cable must be removed.

a) true                                                 

b) false


26.  All applicable articles of the Code apply to intrinsically safe systems except where specifically modified by article 504.

a) true                                                 

b) false


27. All areas designated as hazardous (classified) must be properly ______ and the documentation must be available to those authorized to design, install, inspect, maintain, or operate electrical equipment at these locations.

a) cleaned                   

b) documented                       

c) maintained             

d) all of these


28.  All branch circuits that supply 15 and 20A, 125V single-phase outlets installed in dwelling unit bedrooms must be protected by a(n) _____ listed to provide protection of the entire branch circuit.

a) AFCI                      

b) GFCI                     

c) a and b                   

d) none of these


29.  All cut ends of rigid metal conduit must be _____ or otherwise finished to remove rough edges.

a) threaded                 

b) reamed                   

c) painted                   

d) galvanized


30.  All electric equipment, including power-supply cords, used with storable pools must be protected by _____.

a) fuses                       

b) circuit breakers       

c) double-insulation   



31.  All electrical connections in marinas and boatyards must be located _____.

a) at least 12 in. above the deck of a floating pier     

b) not less than 12 in. above the deck of a fixed pier

c) not below the electrical datum plane

d) all of these


32.  All joints between lengths of rigid nonmetallic conduit, and between conduit and couplings, fittings, and boxes must be made by _____.

a) the authority having jurisdiction    

b) set screw fittings

c) an approved method                      

d) expansion fittings


33.  All receptacles for temporary branch circuits are required to be electrically connected to the _____ conductor.

a) grounded    

b) grounding  

c) equipment grounding         

d) grounding electrode


34.  All threaded conduit or fittings referred to in hazardous (classified) locations must be made wrench tight in order to _____.

a) prevent sparking when a fault current flows

b) ensure the explosion proof or flameproof integrity of the conduit system

c) a and b

d) none of these


35.  All wiring for Class 1 circuits must be installed in accordance with Article 300 and the other appropriate articles in Chapter 4.

a) true                                                 

b) false


36.  All wiring must be installed so that the completed system will be free from ______, other than required or permitted in Article 250.

a) short circuits           

b) grounds                  

c) a and b                   

d) none of these


37.  Aluminum cable trays must not be used as an equipment grounding conductor for circuits with ground-fault protection above _____.

a) 2,000A                   

b) 300A                      

c) 500A                      

d) 1,200A

                        Table 392.7(B)(2),  Note b

38.  Aluminum conductors, and copper-clad aluminum conductors are permitted only for branch-circuit wiring in mobile homes.

a) true                                                 

b) false


39.  An 8 AWG or larger solid copper equipotential bonding conductor, measured from the pint in the box where the conductors enters the enclosure to eliminate voltage gradients in the pool area.

a) true                                                 

b) false


40. An 8 x 8 x 4 in. deep junction/ splice box requires 6 in. of free conductor, measured from the point in the box where the conductors enter the enclosure. The 3 in. of conductor outside-the-box rule _____.

a) does apply              

b) does not apply       

c) sometimes applies  

d) none of these


41.  An alternate ac power source such as an onsite generator is not a separately derived system if the ______ is solidly interconnected to a service-supplied system neutral.

a) ignition system       

b) fuel cell                  

c) neutral                    

d) line conductor

                        250.20(D) FPN No. 1

42. An electric connector is a device that, by insertion into an electric vehicle inlet, establishes an electrical connection to the electric vehicle for the purpose of charging and information exchange.

a) true                                                 

b) false

                        625.2 Electric Vehicle Connector

43. An equipment grounding conductor must be identified by _____.

a) a continuous outer finish that is green

b) being bare

c) a continuous outer finish that is green with one or more yellow stripes

d) any of these


44. An equipotential plane is an area where wire mesh or other conductive elements are embedded in or placed under concrete bonded to ______.

a) all metal structures             

b) fixed non electrical equipment that may be energized

c) the electrical grounding system     

d) all of these


45. An equipotential plane must be installed in all concrete floor confin3ement areas of livestock buildings and all outdoor confinement areas that contain metallic equipment that is accessible to animas and that may become energized.

a) true                                                 

b) false


46.  An exothermic or irreversible compression connection to fireproofed structural metal is required to be accessible.

a) true                                                 

b) false

                        250.68(A) Ex 2

47. An exposed wiring system for indoor wet location where walls are frequently washed must be mounted so that there is at least _______ between the mounting surface and the electrical equipment.

a) a ¼ in. airspace                                           

b) separation by insulated by bushings

c) separation by non combustible tubing       

d) none of these


48. Any current in excess of the rated current of equipment, or the ampacity of a conductor, is called _____.

a) trip current             

b) faulted                   

c) overcurrent             

d) none of these

                        100 Overcurrent

49. Any pit or depression below a garage floor level of a lubrication or service room where Class 1 liquids are not transferred is considered to be a Class 1, Division _____ location up to floor level and extending 18 in. above floor level and 3 ft. horizontally.

a) 1                             

b) 2                             

c) 3                             

d) not classified

                        511.3(B)(2)(1) and (2)

50. Any pit or depression below the level of aircraft hangar floor is classified as a _____ location that extends up to said floor level.

a) Class I, Division 1 or Zone 1                     

b) Class I, Division 2

c) Class II, Division 1                                    

d) Class III


Necquiz150 part 3

1. An insulated grounded conductor of ______ or smaller must be identified by a continuous white or gray outer finish, or by three continuous white stripes on other than green insulation along its entire length.

a) 3 AWG                  

b) 4 AWG                  

c) 6 AWG                  

d) 8 AWG


2.  ____ must not be installed beneath openings through which materials may be moved, such as openings in farm and commercial buildings, and must not be installed where they will obstruct entrance to these building openings.

a) Overcurrent protection devices      

b) Overhead branch-circuit and feeder conductors

c) Grounding Conductors                  

d) Wiring systems


3.  Service-entrance or feeder conductors whose  demand loud is determined by the optional calculation, as permitted in 220.88, are not permitted to have the neutral load determined by 220.61.

a) true                                                 

b) false


4. A building or structure must be supplied by a maximum of ______ service(s).

a) one                         

b) two                         

c) three                       

d) as many as desired


5. A receptacle connected to a small-appliance circuit can supply gas-fired ranges, ovens, or counter-mounted cooking units.

a) true                                                 

b) false

                        210.52(B)(2) Ex 1

6.  A receptacle outlet for the laundry is not required in a dwelling unit in a multifamily building when laundry facilities that are available to all building occupants are provided in the premises.

a) true                                                 

b) false

                        210.52(F) Ex 1

7.  A receptacle outlet must be installed in dwelling units for every kitchen and dinging area countertop space ______, and no point along the wall line can be more than 2 ft, measured horizontally, from a receptacle outlet in that space.

a) wider than 10 in.     b) wider than 3 ft.       c)18 in, or wider          d) 12 in. or wider


8. A single piece of equipment consisting of a multiple receptacle comprised of ______ or more receptacles must be computed as not less than 90 VA per receptacle.

a)  1                            

b) 2                             

c) 3                             

d) 4


9. All 15 and 20A, 125V single-phase receptacles installed in crawl spaces at or below grade level and in ______ of dwelling units must have GFCI protection for personnel.

a) unfinished attics                 

b) finished attics        

c) unfinished basements         

d) finished basements

                        210.8(A)(4) and (5)

10.  All ungrounded (hot) conductors from two or more branch circuits terminating on multiple devices or equipment on the same yoke must have a means to be disconnected simultaneously in _______ occupancies.

a) dwelling unit          

b) commercial             

c) industrial                

d) all of these


11. At least one receptacle outlet must be installed directly above a show-window for each _____, or major fraction thereof, of show-window area measured horizontally at its maximum width.

a) 10 ft.                      

b) 12 ft.                      

c) 18 ft.                      

d) 24 ft.

At least one wall switch-controlled lighting outlet must be installed in every habitable room and bathroom of a guest room or guest suite of hotels, motels, and similar occupancies. A receptacle outlet controlled by a wall switch may be used to meet this requirement in other than _____.

a) bathrooms              

b) kitchens                  

c) sleeping areas         

d) both a and b

                        210.70(B) Ex 1

13. Dwelling unit or mobile home feeder conductors need not be larger than the service conductors and are permitted to be sized according to 310.15(B)(6).

a) true                                                 

b) false


14. For other than dwelling units or guest rooms of hotels or motels, the feeder an dservice lad calculation for track lighting is to be determined at 150VA for every _____ track installed.

a) 4 ft.                        

b) 6 ft.                        

c) 2 ft.                        

d) none of these


15. GFCI protection for personnel is required for all 15 and 20A, 125V single-phase receptacles installed _____ of commercial, industrial, n all other non dwelling occupancies.

a) in storage rooms     

b) in equipment rooms           

c)  in warehouse         

d) in bathrooms


16. GFCI protection for personnel is required for all 15 and 20A, 125V single-phase receptacles installed in a dwelling unit ______.

a) attic                        

b) garage                    

c) laundry                   

d) all of these


17.  Ground-fault protection of equipment is required of the feeder disconnect if _____.

a) the feeder is rated 1,000A or more

b) it is a solidly-grounded wye system

c) it is more than 150 volts-to-ground, but not exceeding 600V phase-to-phase

d) all of these


18. Guest rooms in hotels, motels, and similar occupancies without permanent provisions for cooking must have receptacle outlets installed in accordance with 210.52(A) and 210.52(D).

a) true                                                 

b) false


19.  If a dwelling unit is served by a single 1-phase, 3-wire, 120/240Vor 1220/208Vset of service-entrance or feeder conductors with an ampacity of _____ or greater, it is permissible to compute the feeder and service loads in accordance with 220.82 instead of the method specified in Part III of Article 220.

a) 100                         

b) 125                         

c) 150                         

d) 175


20. In a dwelling unit, the minimum required receptacle outlets must be in addition to receptacle outlets that are _____.

a) part of a luminaire or appliance      

b) located within cabinets or cupboards

c) located more than 5 ½ ft. above the floor 

d) all of these


21. In dwelling units, at least one wall receptacle outlet must be installed in bathrooms within _____ of the outside edge of each basin. The receptacle outlet must be located on a wall or partition that is adjacent to the basin or basin countertop.

a) 12 in.                      

b) 18 in.                      

c) 24 in.                      

d) 36 in.


22. In other than dwelling units, GFCI protection is required _____.

a) for outdoor 15 and 20A, 125V single-phase receptacles accessible to the public

b) at an accessible location for HVAC equipment

c) both a and b

d) neither a nor b

                        210.8(B)(4) & (5)

23. Loads that are computed for dwelling unit small-appliance branch circuits can be included with the _____ load and subject to the demand factors permitted in Table 220.42 for the general lighting load.

a) general lighting      

b) feeder                     

c) appliance                

d) receptacle


24. More than one feeder or branch circuit is permitted to supply a single building or other structure sufficiently large to require two or more supplies if permitted by _____.

a) architects    

b) special permission  

c) written authorization          

d) master electricians


25. Multioutlet circuits rated 15 or 20A can supply fixed appliances (utilization equipment fastened in place) as long as the fixed appliances do not exceed  _____ percent of the circuit rating.

a) 125                         

b) 100                         

c) 75                           

d) 50


26. Overhead conductors installed over roofs must have a vertical clearance of _____ above the roof surface.

a) 8 ft.                        

b) 12 ft.                      

c) 15 ft.                      

d) 3 ft.


27. Overhead-service conductors to a building must maintain a vertical clearance for final spans above, or within, _____ measured horizontally from the platforms, projections, or surfaces from which they might be reached.

a) 3 ft.                        

b) 6 ft.                        

c) 8 ft.                        

d) 10 ft.


28. Receptacle outlets in floors are not counted as part of the required number of receptacle outlets to service dwelling unit wall spaces unless they are located within ____ of the wall.

a) 6 in.                        

b) 12 in.                      

c) 18 in.                      

d) close to the wall


29. Service conductors supplying a building or other structure must not _____ of another building or other structure.

a) be installed on the exterior walls               

b) pass through the interior

c) a and b                                                       

d) none of these


30. Service-drop conductors must have a minimum of _____ vertical clearance from final grade over residential property and driveways, as well as those commercial areas not subject to truck traffic where the voltage is limited to 300 volts-to-ground.

a) 10 ft.                      

b) 12 ft.                      

c) 15 ft.                      

d) 18 ft.


31. The 3 VA per-square foot general lighting load for dwelling units does not include _______.

a) open porches                                                                                  

b) garages

c) unused or unfinished spaces not adaptable for future use             

d) all of these


32. The calculated load to which the demand factors of Table 220.84 apply must include 3 VA per _____ for general lighting and general use receptacles.

a) inch                        

b) foot                        

c) square inch             

d) square foot


33. The feeder demand load for nine 16 kw ranges is _______.

a) 15,000W                

b) 28,800W                

c) 20,000W                

d) 26,000W

                        Table 220.55, Note 1

34.       The grounded conductor of a 3-wire branch circuit supplying a household electric range is permitted to be smaller than the ungrounded conductors when the maximum demand of a range of 8.75 kW or more rating has been computed according to Column C of Table 220.19. However, the ampacity of the grounded conductor must not be less than ______  percent of the branch  circuit rating and not be smaller than _____ AWG.

a) 50, 6                       

b) 70, 6                       

c) 50, 10                     

d) 70, 10

                        210.19(A)(3) Ex 2

35. The identification of _____ to which a grounded conductor is to be connected must be substantially white in color.

a) wire conductors     

b) circuit breakers       

c) terminals                 

d) ground rods


36. The location of the arc-fault circuit interrupter can be at other than the origination of the branch circuit if _______.

a) the arc fault circuit interrupter is installed within 6 ft. of the branch circuit overcurrent device

b) the circuit conductors up to the arc-fault circuit interrupter are in a metal raceway or a cable with a metallic sheath

c) both a and b

d) none of these

                        210.12(B) Ex

37. The minimum point of attachment of overhead conductors to a building must in no case be less than _____ above finished grade.

a) 8 ft.                        

b) 10 ft.                      

c) 12 ft.                      

d) 15 ft.

225.16 and 230.26

38. The minimum size service-drop conductor permitted by the Code is ____ AWG copper or ______ AWG aluminum copper-clad aluminum.

a) 8, 6                         

b) 6, 8                         

c) 6, 6                         

d) 8, 8


39. The rating of a branch circuit is determined by the rating of the ______.

a) ampacity of the largest device connected to the circuit

b) average of the ampacity of all devices

c) branch-circuit overcurrent protection

d) ampacity of the branch circuit conductors according to Table 310.16


40. The two to six disconnects as permitted by 225.33 just be ____. Each disconnect must be marked to indicate to the load served.

a) the same size          

b) grouped      

c) in the same enclosure         

d)none of these


41. There must be a minimum of one ___ branch circuit for the laundry outlet(s) in a dwelling unit.

a) 15A                        

b) 20A                        

c) 30A                        

d) 24A


42. To determine the feeder demand load for ten 3 kW household cooking appliance, use _____ of Table 220.19.

a) Column A              

b) Column B              

c) Column C               

d) none of these

                        220.55 and Table 220.55

43. What is the maximum cord-and-plug connected load permitted on a 15A receptacle that is supplied by a 20A circuit supplying multiple outlets?

a) 12A                        

b) 16A                        

c) 20A                        

d) 24A

                        210.21(B)(2) and Table 210.21(B)(2)

44. When applying the demand factors of Table 220.56, in no case can the feeder or service demand load be less than the sum of _____.

a) the total number of receptacles at 180 VA per receptacle outlet

b) the VA rating of all of the small appliance circuits combined

c) the larges two kitchen equipment loads

d) the kitchen heating and air conditioning loads


45. 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.

a) true                                                 

b) false


46. When considering lighting outlets in dwelling units, a vehicle door in a garage is considered an outdoor entrance.

a) true                                                 

b) false


47. When the building disconnecting means is a power-operated switch or circuit breaker, it must be able to be opened by hand in the event of a ______.

a) ground fault                                   

b) short circuit            

c) power surge                        

d)power-supply failure


48. Where grounded conductors of different wiring systems are installed in the same raceway, cable, or enclosure, each grounded conductor must be identified by a different one of the acceptable methods in order to distinguish the grounded conductors of each system from the other.

a) true                                                 

b) false


49. Where more than one nominal voltage exists in a building, each ungrounded conductor of a branch circuit, where accessible, must be identified by system. The identification can be _____ and must be permanently posted at each branch-circuit panel board.

a) color-coding           

b) phase tape              

c) tagging                   

d) any of these


50.  Which rooms in a dwelling unit must have a switch-controlled lighting outlet?

a) Every habitable room         

b) bathrooms  

c) hallways and stairways      

d) all of these

                        210.70(A),(1) and (2)

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