Journeyman Electrical Exam Prep
When sizing grounded conductors for parallel raceways installed for a separately derived ac system and the system bonding jumper is not located at the source, they shall also be installed in parallel and not smaller than _____. 1 AWG 1/0 AWG 3/0 AWG 250 kcmil
1/0 AWG 250.30(A)(3)(b)
Grounding electrodes of bare or electrically conductive coated iron or steel plates shall be at least _______ in thick. 1/8 1/4 1/2 3/4
1/4 250(A)(7)
In installations within or behind noncombustible walls or ceilings, the front edge of a box, plaster ring, extension ring, or listed extender employing a flush type cover shall be set back not more than _________ from the finished surface. 1/8in 1/4in 3/8in 1/2in
1/4 in 314.20
Where nonmetallic sheathed cable or multi-conductor Type UF cable is used with a single box not larger than 2 1/4" X 4" mounted in walls or ceilings, the cable shall be fastened within _________ inches. 1/4in 3/8in 1/2in 3/4in
1/4in 314.17 (B)(2)
In order for a metal underground water pipe to be used as a grounding electrode, it shall be in direct contact with the earth for _____. 5' 10' or more Less than 10' 20' or more
10' or more 250.52(A)(1)
Overhead service conductors shall have a minimum clearance from final grade of _____ above areas or sidewalks accessible only to pedestrians, measured from final grade or other accessible surfaces where the voltage does not exceed 150 volts to ground 8ft 10ft 12ft 15ft
10ft 230.24(B)(1)
Overhead service conductors shall have a minimum vertical clearance of _____ft from final grade over residential property and driveways, as well as over commercial areas not subject to truck traffic where the voltage does not exceed 300 volts-to-ground. 10 12 15 18
12 230.24(B)(2)
Type AC cable shall be secured at intervals not exceeding 4 1/2ft and within _____ of every outlet box, cabinet, conduit body, or fitting. 6in 8in 10in 12in
12in 320.30
A buried iron or steel plate used as a grounding electrode shall expose not less than _____sq ft of surface area to exterior soil. 2 4 9 10
2 250.52(A)(7)
Service conductors shall be considered outside of a building or other structure where installed under not less than _______ of concrete beneath a building or other structure 2" 4" 5" 6"
2" 230.6(1)
Bends in Type TC cable shall be made so as not to damage the cable. For Type TC cable larger than 1 in. and up to 2 in. in diameter, without metal shielding, the minimum bending radius shall be at least _____ times the overall diameter of the cable. 2 times 3 times 5 times 7 times
5 times 336.24
Grounding electrode conductors smaller than _____ AWG shall be protected in rigid metal conduit, IMC, PVC, conduit, electrical metallic tubing or cable armor 10 8 6 4
6 250.64(B)(3)
Where splices or U pulls are made and the conductor enters and leaves from the same wall and row of the box, the distance to the opposite wall may not be less than _______ the trade size of the largest raceway in the row plus the sum of the remaining trade sizes in the same row. Twice 3 times 6 times 8 times
6 times 314.28
Where splices, or, angle or U pulls are made, the distance between each raceway entry inside the box and the opposite wall of the box may not be less than _____ the trade size of the largest raceway in a row. Twice 3 times 6 times 8 times
6 times 314.28
Circuit breakers and switches containing fuses shall be readily accessible and installed so the center of the grip of the operating handle of the switch or circuit breaker, when in its highest position, is not more than _____ above the floor or working platform 2' 4' 6" 5' 6' 7"
6' 7" 240.24(A)
Pull boxes or junction boxes with any dimension over _____ ft shall have all conductors cabled or racked in an approved manner. 3ft 6ft 9ft 12ft
6ft 314.28
When Type AC cable is run across the top of a floor joist in an attic without permanent ladders or stairs, guard strips within _______of the scuttle hole or attic entrance shall protect the cable. 3ft 4ft 5ft 6ft
6ft 320.23
Type MC cable shall be secured at intervals not exceeding _____. 3ft 4ft 6ft 8ft
6ft 330.30
________is an unthreaded thin wall metallic raceway of circular cross section designed for the routing and physical protection of electrical conductors and cables when joined together with listed fittings. LFNC EMT NUCC RTRC
EMT 358.2
Metal braces used for the support of boxes shall be protected against corrosion. True False
True 314.23
Type NM cable shall closely follow the surface of the building finish or running boards when run exposed. True False
True 334.15
Type SE cable can be used for interior wiring as long as it complies with the installation requirements of Part II of Article 334, excluding 334.80 True False
True 338.10
The general requirements for overcurrent protection and overcurrent protective devices not more than 1000 volts, nominal are provided in Article _____. 230 240 242 250
240 240.1
When a ground ring is used as a grounding electrode, it shall be installed at a depth below the earth's surface of not less than________. 18" 24" 30" 8'
30" 250.53(F)
A bare 4 AWG copper conductor installed horizontally near the bottom or vertically, and within that portion of a concrete foundation or footing that is in direct contact with the earth, can be used as a grounding electrode when the conductor is at least _____ ft in length. 10 15 20 25
20 250.52(A)(3)(2)
The grounded conductor brought to service equipment shall be routed with the phase conductors and shall not be smaller than specified in Table______ when the service-entrance conductors are 1,100 kcmil copper and smaller. 250.102(C)(1) 250.122 310.16 430.52
250.102(C)(1) 250.24(C)(1)
Service conductors installed as unjacketed multiconductor cable shall have minimum clearance of ________ ft from windows that are designed to be opened, doors, porches, balconies, ladders, stairs, fire escapes, or similar locations. 3 4 6 10
3 230.9 (A)
For installations consisting of not more than two 2-wire branch circuits, the service disconnecting means shall have a rating of not less than___. 15A 20A 25A 30A
30A 230.79(B)
Plug fuses of the Edison-base type shall have a maximum rating of _____. 20A 30A 40A 50A
30A 240.51
Article______ covers the use, installation, and construction specifications for armored cable, Type AC. 300 310 320 334
320
The use, installation, and construction specifications of metal-clad cable, Type MC are covered within Article _____. 300 310 320 330
330
The use, installation, and construction specifications of nonmetallic-sheathed cable are covered within Article ______ 300 334 400 410
334
Article _____ covers the use, installation, and construction specifications for power and control tray cable, Type TC. 326 330 334 336
336
Article _____ covers the use, installation, and construction specification for liquidtight flexible nonmetallic conduit and associated fittings 300 334 350 356
356
EMT run between termination pints shall be securely fastened within ________ of each outlet box, junction box, device box, cabinet, conduit body. or other tubing termination. 12in 18in 2ft 3ft
3ft 358.30
Where Type LFNC conduit is installed in lengths exceeding _____ft the conduit shall be securely fastened at intervals not exceeding 3ft with 12in on each side of every outlet box, junction box, cabinet, or fitting. 2ft 3ft 6ft 10ft
6ft 356.30
When Type NM cable is used with nonmetallic boxes not larger than 2 1/4 x 4 in., securing the cable to the box shall not be required if the cable is fastened within _____ in. of that box. 6 8 10 12
8 314.17
Overhead service conductors installed over roofs shall have a vertical clearance of not less than _____ft above the roof surface, unless a lesser distance is permitted by an exception. 3 8 12 15
8ft 230.24(A)
Service heads on raceways or service-entrance cables and goosenecks in service-entrance cables shall be located _____ the point of attachment, unless impracticable. Above Below Even with Any of these
Above 230.54(C)
Cartridge fuses in circuits of _______, and all fuses in circuits over 150 volts to ground, shall be provided with a disconnecting means on their supply side so that each circuit containing fuses can be independently disconnected from the source of power. Any Voltage Over 250V to ground Over 600 V Over 1000V
Any Voltage 240.40
In a dwelling unit, illumination for outdoor entrances that have grade-level access can be controlled by ____ control. Remote Central Automatic Any of these
Any of these 210.70(A)(2)(3) Ex
________ is a raceway of circular cross section having an outer liquid tight, nonmetallic, sunlight resistant jacket over an inner flexible metal core FMC LFNMC LFMC Vinyl clad Type MC
LFMC 350.2
Where used to secure or support LFNC, cable ties shall be _____ for the application. Listed Labeled Marked Approved
Listed 356.30
Where the circuit breaker handles are operated vertically, the up position of the handle shall be the______ position. On Off Tripped Any of these
On 240.81
EMT couplings and connection shall be made up ______ Of metal In accordance with industry standards Tight To be readily accessible
Tight 358.42
Solar photovoltaic systems, fuel cell systems, wind electric systems, energy storage systems, or interconnected electric power production sources are permitted to be connected to the supply side of the service disconnecting means. True False
True 230..82(6)
Where dwelling unit service equipment is replaced, a surge protective device (SPD) shall be installed. True or False
True 230.67(A) and (D)
Service conductors shall not be installed beneath openings through which materials may be moved and shall not be installed where they will obstruct entrance to these buildings openings. True False
True 230.9(C)
Feeder taps are permitted to be located at any point on the load side of the feeder overcurrent protective device. True or False
True 240.21(B)
Plug fuses of the Edison base type shall be used only ______. Where over fusing is necessary As a replacement in existing installations As a replacement for type S fuses If rated 50A and above
As a replacement in existing installations 240.51(B)
Type SE cable shall be permitted to be used as _____ Branch circuits Feeders Underground service entrance conductors if in a raceway Branch circuits or feeders
Branch circuits or feeders 338.10, 338.12
Type ______ cable is a single conductor or multiconductor cable identified for use as underground service-entrance cable. Branch circuits Feeders Underground service entrance conductors if in a raceway Branch circuits or feeders
Branch circuits or feeders 338.2
Extreme cold can cause some types of nonmetallic conduits to become _____ and therefore more susceptible to damage from physical contact Stiff Larger Weak Brittle
Brittle 356.10
Where IMC enters a box, fitting, or other enclosure, _____ shall be provided to protect the wire from abrasion unless the design of the box, fitting, or enclosure affords equivalent protection. A Bushing Duct seal Electrical tape Seal fittings
Bushing 342.46
Extreme ____ may cause PVC conduit to become brittle, and therefore more susceptible to damage from physical contact. Sunlight Corrosive conditions Heat Cold
Cold 352.10
Unbroken lengths of electric nonmetallic tubing shall not be required to be secured where fished between access points for ______work in finished buildings or structures and securing is impractical Concealed Exposed Hazardous Completed
Concealed 362.30
Threadless couplings and connectors used with RMC buried in masonry or concrete shall be the _____ type. Raintight Wet and damp location Nonabsorbent Concrete tight
Concrete tight 344.42
Galvanized steel, stainless steel, and red brass RMC elbows, couplings, and fittings shall be permitted to be installed in concrete in direct contact with the earth or in areas subject to severe corrosive influences when protected by _____ approved for the condition Ceramic Corrosion protection Backfill A natural barrier
Corrosion Protection 344.10
The 120V, 20A branch circuit required for a garage is not permitted to supply readily accessible outdoor receptacle outlets. True False
False 210.11(C)(4) EX
Service entrance conductors shall be continuous and are not permitted to be spliced or tapped. True False
False 230.46
Where bonding jumper(s) are used to connect the grounding electrodes together to form the grounding electrode system, rebar is permitted to be used as a conductor to interconnect the electrodes. True False
False 250.53(C)
The radius of the curve of the inner edge of any bend, during or after installation, shall not be less than ______ times the diameter of Types USE or SE cable. Five Seven Ten Twelve
Five 338.24
The upper end of the electrode shall be _____ unless the aboveground end and the grounding electrode conductor attachment are protected against physical damage as specified in 250.10. No more than 1 in above ground level No more than 2 in above ground level No more than 3 in above ground level Flush with or below ground level
Flush with or below ground level 250.53(A)(4)
Where practicable, contact of dissimilar metals shall be avoided in an IMC raceway installation to prevent the possibility of _______ Corrosion Galvanic action Short circuits Ground faults
Galvanic Action 342.14
The building or structure grounding electrode system shall be used as the ______ electrode for the separately derived system. Grounding Bonding Grounded Bonded
Grounding 250.30(A)(4)
Where an AC system operating over 1,000 volts is grounded at any point and is provided with a grounded conductor at the service point, a grounded conductor is required to be installed and routed to each service disconnecting means grounded conductor(s) terminal bar or bus in the service equipment. System Bonding Jumper Supply-side bonding jumper Main bonding jumper Equipment bonding jumper
Main bonding jumper 250.24(C)
Service conductors supplying a building or other structure shall not _______of another building or other structure. Be installed on the exterior walls Pass through the interior Be installed underneath Span the roof
Pass through the interior 230.3
If a single rod, pipe, or _____ grounding electrode has a resistance to earth of 25 ohms or less, the supplemental electrode shall not be required. Plate Ring type Grid type Structural
Plate 250.53(A)(2) EX
Galvanized steel and stainless steel EMT, elbows, couplings, and fittings can be installed in concrete, in direct contact with the earth, or in areas subject to sever corrosive influences where _____ Protected by corrosion protection Made of aluminum Made of stainless steel Listed for wet locations
Protected by corrosion protection 358.10
Additional services shall be permitted for a single building or other structure sufficiently large to make two or more services necessary if permitted by _____. The registered design professional Special permission The engineer of record Master Electrician
Special permission 230.2(C)(3)
Type NM cable on a wall of an unfinished basement installed in a listed raceway shall have a _____ installed at the point where the cable enters the raceway. Suitable insulating bushing or adapter Sealing fitting Bonding bushing Junction box
Suitable insulating bushing or adapter 334.15
ENT shall not be used where exposed to the direct rays of the sun, unless identified as _____ High temperature rated Sunlight resistant Schedule 80 Suitable
Sunlight resistant 362.12
Reinforcing bars for use as a concrete-encased electrode can be bonded together by the usual steel tie wires or other effective means. True False
True 250.52(A)(3)(1)
Grounding electrode conductors that are not subject to physical damage can be run exposed along the surface of the building construction if securely fastened to the surface of which they are carried. True False
True 250.64(B)
Type USE cable used for service laterals shall be permitted to emerge from the ground if terminated in an enclosure at an outside location and protected in accordance with 300.5(D) True False
True 338.12
Type UF cable is permitted to be used for inside wiring. True False
True 340.10
Where approved, rigid metal conduit shall not be required to be securely fastened within 3ft of the service head for above-the-roof termination of a mast True False
True 344.30
The use of LFMC shall be permitted for direct burial where listed and marked for the purpose. True False
True 350.10
At Type AC cable terminations, a(n) ______shall be provided to protect wires from abrasion. Fitting Connector Electrical tape wrapped between the armor and the conductors Adapter
fitting 320.40
The ampacity of Type UF cable shall be that of ______ conductors in accordance with 310.15 60 C 70 C 90 C 105 C
60C 340.80
Tap conductors not over 25 ft in length shall be permitted, proving the _____. A. Ampacity of the tap conductor is not less than one third the rating of the overcurrent device protecting the feeder conductors being tapped. B. Tap conductors terminate in a single circuit breaker or set of fuses that limits the load to the ampacity of the tap conductors C. Tap conductors are suitable protected from physical damage D. All of these
All of these 240.21(B)(2)(1) and (2)
The standard ampere rating for fuses include(s) _______ 1A 6A 601A All of these
All of these 240.6(A)
Type TC cable can be used ______ For power lighting, control, and signal circuits In cable trays including those with mechanically discontinuous segments up to 1 ft For Class 1 control circuits as permitted in Parts II and III of Article 725 All of these
All of these 336.10
Type TC cable shall not be used where _____ It will be exposed to physical damage Installed outside of a raceway or cable tray system, unless permitted in 336 Exposed to direct rays of the sun, unless identified as sunlight resistant All of these
All of these 336.12
FMC shall not be installed ______ In wet locations Embedded in poured concrete Where subject to physical damage All of these
All of these 348.12
Where a premises wiring system contains feeders supplied from more than one nominal voltage system, each ungrounded conductor of a feeder shall be identified by phase or line and system by _______, or other approved means. Color coding Marking tape Tagging Any of these
Any of these 250.21(C)
The grounding electrode conductor shall be made at any accessible point from the load-end of the service conductors and connected to the ground service conductor at the ________ Load end of the service drop Load end of the service lateral Service disconnecting means Any of these
Any of these 250.24(A)(1)
Type NM cable can be supported and secured by ______ Staples Cable ties listed and identified for securement and support Straps Any of these
Any of these 334.30
For grounded systems, normally noncurrent carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment shall be connected together and to the _________to establish an effective ground fault current path. Ground Earth Electrical supply source Enclosure
Electrical Supply Source 250.4(A)(3)
When LFNC is used, and equipment grounding is required, a separate _____ shall be installed in the conduit. Equipment grounding conductor Expansion fitting Flexible nonmetallic connector grounded conductor
Equipment grounding conductor 356.60
In installations within walls or ceilings constructed of wood or other combustible surface material, boxes, plaster rings, extension rings, or listed extenders shall ________. Extended to the finished surface Not be permitted Be fire rated Be set back no more than 1/4in
Extended to the finished surface 314.20
An unspliced _____ that is sized based on the derived phase conductors shall be used to connect the grounded conductor and the supply-side bonding jumper, or the equipment grounding conductor, or both, at a separately derived system. System bonding jumper Equipment grounding conductor Grounded conductor Grounding electrode conductor
System bonding jumper 250.30(A)(1)
Barriers shall be placed in service equipment such that no uninsulated, ungrounded service busbar or service_______ is exposed to inadvertent contact by persons or maintenance equipment while servicing load terminations Phase conductor Neutral conductor Terminal Disconnect
Terminal 230.62(C)
Grounding electrode conductors and grounding electrode bonding jumpers in contact with ______ shall not be required to comply with 300.5 but shall be buried or otherwise protected if subject to physical damage. Water The Earth Metal All of these
The earth 250.64(B)(4)
If the source of a separately derived system and the first disconnecting means are located in separate enclosures, a supply-side bonding jumper of the wire type shall comply with 250.102(C), based on _____. The size of the primary conductors The size of the secondary overcurrent protection The size of the derived ungrounded conductors One third the size of the primary grounded conductor
The size of the derived ungrounded conductors 250.30(A)(2)(1)
Ungrounded alternating current systems from 50V to less than 1,000V must be legibly marked "Caution: Ungrounded System-Operating ______Volts Between Conductors" at _________of the system, with sufficient durability to withstand the environment involved. The Source The first disconnecting means Every junction box The source or the first disconnecting means
The source or the first disconnecting means 250.21(C)
When installing auxiliary electrodes, the earth shall not be used as an effective ground fault current path. True False
True 250.54
The grounding of electrical systems, circuit conductors, surge arresters, sure protective devices, and conductive normally noncurrent carrying metal parts of equipment shall be installed and arranged in a manner that will prevent objectionable current. True False
True 250.6(A)
ENT is not permitted in hazardous (classified) locations, unless permitted in other articles of the Code. True False
True 362.12
If a building or structure is supplied by a service or feeder with ________ or more disconnecting means in separate enclosures', the grounding electrode connections shall be made in accordance with 250.64(D)(1) One Two Three Four
Two 250.64(D)