NEC 2017
What is the smallest conductor size allowed to be ran in parallel?
1/0 AWG 310.10(H)(1)
Floor receptacles in or on floors shall not be counted as part of the required number of receptacle outlets unless they are within _____ inches of the wall.
18 210.52(A)(3)
In Class 1, Division 1 locations conduit seals shall be placed a minimum of ____ inches from enclosures containing arc producing equipment. A) 12 B) 18 C) 24 D) 30
B) 18 501.15(A)(1)(2)
When intermediate members (such as balusters or additional rails) are used on scaffolding, they shall NOT be more than how many inches apart? A) 16 in B) 19 in C) 22 in or D) 26 in
B) 19 in
Type SE or USE cable containing ______ or more conductors shall be permitted to have one conductor uninsulated. A) 1 B) 2 C) 3 D) any
B) 2 338.100
Snap switches directly connected to aluminum conductors shall be listed and marked CO/ALR if rated at _______. A) 15A or less B) 20A or less C) 30A or less or D) 40A or less
B) 20A or less 404.14(C)
In an auxiliary metal gutter, how many current carrying conductors are allowed before derating? A) 20 B) 30 C) 40 D) 50
B) 30 366.23(A)
MI-Cable shall be supported at intervals not exceeding ______ft? A) 5 B) 6 C) 7 or D) 8
B) 6 332.30
Loop wiring _______ in a cellular metal raceway. A) is considered a splice or tap when used B) is not considered a splice or tap C) is not permitted D) none of the above
B) is not considered a splice or tap 374.56
Outdoor service disconnects for a mobile home must be at least _____ in from the bottom of the equipment, to ground level. A) 10 B) 18 C) 24 D) 36
C) 24 550.11(A)
the derating factors for sheet metal auxiliary gutters shall be applied only where the number of current-carrying conductors exceeds _____. A) 15 B) 25 C) 30 ) no limit
C) 30 366.22(A)
GFCI protected receptacles are required for all 125v single-phase, 15 and 20 amp receptacles within ______ft of dwelling unit sinks. A) 4ft B) 5ft C) 6ft or D) 8ft
C) 6ft 210.18(A)(7)
Bends made in interlocked or corrugated sheath metal clad cable must maintain a bending radius of at least ______ the external diameter of the metallic sheath. A) 5 times B) 6 times C) 7 times or D) 8 times
C) 7 times 330.24(B)
A 10ft section of ______ is not considered a grounding conductor. A) AC Cable B) Cable tray C) FMC D) Auxiliary gutter
C) FMC 250.118(5)(C)
Electrical floor boxes must be? A) Metal B) PVC C) Listed for the application, or D) Dust tight.
C) Listed for the application 314.27(C)
Conduit using lock-nut fittings shall NOT be attached to the _____ of round boxes. A) Conduit hub B) Back C) Round or D) All of the above.
C) Round side 314.2
No horizontal point along the wall of a kitchen counter top may be more than ______in. from a receptacle outlet. A) 8 B) 10 C 16 or D) 24
D) 24" 210.52(B)(1)
In an unfinished basement the smallest NM cable that can be attached to the bottom edge of a floor joist is? A) 2-#6 B) 3-#6, C)3-#8, or D) A and C
D) A & C 334.15(C)
For a dwelling, what type of door location does NOT require an exterior light circuit? A) Back of house B) garage personal C) Side of house, or D) garage vehicle
D) Garage vehicle 210.70(2)(B)
Thread-less couplings and connectors used with RMC and installed in wet locations must be ______. A) approved for damp locations B) listed for damp locations. C) approved for wet locations D) listed for wet locations.
D) listed for wet locations. 344.42(A) 314.15
What is the minimum size grounding equipment conductor required for a PV system? A) 14AWG B) 12AWG C) 10AWG or D) 8AWG
A) 14 AWG 690.45
AC systems 50-1000v shall be grounded where voltage to unground do not exceed? A) 150v B) 300v C) 600v or D) 1,000v.
A) 150v 250.20(B)(1)
How many receptacle outlets are required above a show window that is 18ft wide? A) 2 B) 3 C)4 or D) none of the above
A) 2 210.62
Service entrance conductors in a raceway beneath a building, under at least _____ inches of concrete is considered to be "outside" the building. A) 2 B) 4 C) 8 D) 12
A) 2 230.6(1)
Disregarding all exceptions, the sum of the cross-sectional area of all the conductors in a metal wire way shall not exceed -----% of the interior cross sectional area of the wireway. A) 20 B) 30 C) 40 D) 60
A) 20% 376.22(A)
General lighting loads by occupancy dwelling units require a minimum of ______ volt-amperes per sq. ft. A) 3 B) 4 C) 5 or D) 8
A) 3 volt amperes Table 220.12
A multi-wire branch circuit shall be provided with a means _______. A) To disconnect ungrounded conductors independently. B) That will simultaneously disconnect all ungrounded conductors at the point where the branch circuit begins. or C) To open the neutral and ungrounded conductor.
B) B) That will simultaneously disconnect all ungrounded conductors at the point where the branch circuit begins. 210.4(B)
What is the minimum distance combustible material, such as insulation, can be to a non-type IC recessed luminaire? A) 1/4" B) 1/2" C) 3/4" D)1"
B) 1/2" 410.116(A)(1)
True or False: A duplex receptacle box reduces the number of allowed conductors by two.
A) True 314.16(B)(4)
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 the ______. A) largest two kitchen equipment loads B) heat and air conditioning loads C) rating of the appliance loads D) total receptacle load
A) largest two kitchen equipment loads 220.56
Where outside, aluminum or copper-clad aluminum ground electrode conductors shall NOT be terminated within _____ in of Earth. A) 12 in B) 18 in C) 24 in D) 36 in
B) 18 in 250.64(A)
What is the volume allowance for a No. 12 conductor when calculating box fill? A) 2.00 in B) 2.25 in C) 2.50 in, or D) 3.00in
B) 2.25 Table 314.16(B)
The maximum trade size EMT permitted to be installed is? A) 2.5 B) 3 C) 4 D) 5 or E) 6
C) 4 358.20(B)
Type MV cable is defined as a single or multiconductor solid dielectric insulated cable rated at ______volts or higher. A) 300 B) 601 C) 1,000 D) 2,001
D) 2,001 328.2
For pool equipment, the disconnecting means for all ungrounded conductors shall be readily accessible and within sight from its equipment and shall be located a minimum of how many feet horizontally from the inside walls of a pool? A) 5 feet B) 6 feet C) 8 feet D) 10 feet
A) 5 feet 680.13
Overhead service drops shall NOT have conductors smaller than? A) #8 Copper B) #4 Aluminium C) #6 Copper, or D) #4 Copper
A) 8AWG copper 230.23(B)
Type AC cable must provide _______for equipment grounding. A) An adequate path B) A green terminal on all fittings C) a solid green copper conductor in all cables or D) all of the above
A) An adequate path. 320.108
Lamp tie wires, mounting screws, clips, and decorative bands on glass shall NOT be required to be grounded if spaced at least how far from the lamp terminals? A) 1" B) 1 1/2" C) 2" or D) 2 1/2"
B) 1 1/2" 410.42
A written emergency action plan is required for all employers with how many employees? A) 8+ B) 9+ C) 10+ or D) 11+
D) 11+ OSHA 1910.38 (c)
What are the four vertical clearances for services, and what are in each group?
10ft- Service entrances to buildings. Sidewalks. 12ft- Driveways, commercial areas not subject to truck traffic where voltage is below 300v to ground. 15ft- Those listed in 12ft above 300v to ground. 18ft- Public streets, alleys, roads, parking areas subject to truck traffic. 230.24(B)
What is the maximum combined length of FMC, FMT, and LFMC in the same ground-fault current path. A) 4ft B) 5ft C) 6ft D) 10ft
250.118(5)(C)
The maximum size of FMT that may be used in any construction or installation is? A) 3/8" B) 1/2" C) 3/4" or D) 1"
3/4" 360.20(B)
Type NM cable is required to be supported at intervals NOT exceeding lengths of ______ft.
4 1/2 feet 332.30
What is the minimum required number of branch circuits in a dwelling, and where are they located?
4. 2 small appliance, 1 laundry, and 1 bathroom. 210.11(C)
Festoon lighting over ______Ft in length shall be supported by a _______ wire.
40 feet, messenger 225.6(B)
A ceiling light fixture weighing over _____lbs. may NOT be supported by a standard outlet box.
50 314.27(A)(2)
Electrical equipment within _____ ft of pools or spas shall be grounded. A) 3ft B) 5Ft C) 8ft or D) 10ft
5ft 680.6(2)
Around a pool, what is the smallest solid copper wire that can be used a as a common grid?
8 AWG 680.26(B)(1)(b)
A grounding electrode shall be installed so ______ft in contact with soil. (Earth) A) 6 B) 8 C) 10 or D) 15
8 ft 250.53(G)
What is the maximum clearance (vertically) required above a roof surface? Also how long shall it be maintained in all directions of a roof edge?
8 ft high, and 3 ft from edge. 230.24(A)
What is the maximum ampacity of a 1 inch square bare copper bar in a sheet metal auxiliary gutter? A) 10A B) 100A C) 1,000A or D) 10,000A
C) 1,000A 366.23(A)
The two small appliance branch circuits in dwellings need to be calculated at _______volt amperes. (Watts) A) 750 B) 1,000 C) 1 ,500 or D) 2,000
C) 1,500 220.52(A)
What is the minimum distance a concealed or visible bored holed can be from the edge of a wood member? A) 3/4" B) 1" C) 1.25" D) 1.50"
C) 1.25" 300.4(A)(1)
Where a feeder supplies continuous loads or any combination of continuous and non-continuous loads, the minimum feeder conductor size shall have an allowable ampacity not less than the non-continuous load plus what percentage of the continuous load? A) 100% B) 115% C) 125% or D) 150%
C) 125% 215.3
Luminaries containing a metal halide lamp, other than a thick-glass parabolic reflector lamp (PAR), must be provided with a containment barrier that encloses the lamp, or the luminaire must be provided with a physical means that only allows use of a(n) ______. A) Type PAR lamp B) incandescent lamp C) Type "O" lamp D) None of the above
C) Type "O" 410.130(F)(5)
Class II locations are those that are hazardous because of the presence of ______? A) ignitable vapors B) ignitable fibers C) combustible dust or D) combustible liquids
C) combustible dust 500.5(C)
The maximum number of conductors permitted in any surface race way must be _______. A) no more than 40% of the inside diameter B) no more than 70% of the csa C) that which is permitted in Table 4 D) no greater than the number it was designed for
D) no greater than the number it was designed for 388.22
True or False: Flexible metal conduit may NOT be used in lengths over 6 ft.
True 360.12(6)
True or False: Receptacles located within 20 feet of the inside walls of a swimming pool require GFCI protection.
True 680.22(A)(4)
It is permissible to extend busways vertically through dry floors if totally enclosed (unventilated) where passing through, and for a minimum distance of ______ ft above the floor to provide adequate protection from physical damage. A) 6 B) 8 C) 10 D) 12
A) 6 368.10(C)(2)(a)
All 125v, 15 and 20 amp receptacles in an unfinished basement must be _____ protected. A) GFCI B) Arc flash C) Physically or D) Permanently
A) GFCI 210.8
Where one or more equipment grounding conductors or equipment bonding jumpers enter a box a single volume allowance shall be made based on the ______ grounding conductor or bonding jumper. A) Largests B) Smallest C) Either
A) Largest 314.16(B)(5)
An outlet for servicing a rooftop electrical A/C unit shall be within ______ft from unit. A) 10 B) 15 C) 20 or D) 25
D) 25 210.63
What is the recommended maximum total voltage drop on both feeders and branch circuits to the farthest outlet? A) 2% B) 3% C) 4% or D) 5%
D) 5% 210.19(A) Information Note #4
Infrared lamp commercial and industrial heating appliances shall have overcurrent protection NOT exceeding which of the following? A) 20A B) 30A C) 40A or D) 50A
D) 50A 422.11(C)
The service disconnecting means, and main over current protection when located inside a building: A) is permitted to be located in a clothes closet, B) Not permitted in a kitchen, C) Required to be located within 6ft of point of the service entrance to the building, or D) As close as possible (practical) where the service entrance conductors enter the building.
D) As close as possible (practical) where the service entrance conductors enter the building. 230.70(A)(1)
Surge arresters are grounded at the arrester grounding terminal. If the arrester ground conductor is ran in a metal enclosure, the grounding conductor MUST be bonded at ______end(s) of the enclosure. A) one B) the supply C) the load D) both
D) Both 280.25
Underground rigid non-metallic raceways subject to damage must be _____? A) Schedule 20 B) Schedule 40 C) Schedule 60 or D) Schedule 80
D) Schedule 80 300.5(D)(4)
What part of a bulk storage plant is classified as Class 2, Zone 2? A) vents, discharging upwards B) below grade storage tank equipment C) pits and sumps w/o mechanical ventilation, or D) drainage ditches, separators, and impounding basins
D) drainage ditches, separators, and impounding basins Table 515.3
A single piece of equipment consisting of a multiple receptacle comprised of ______ or more receptacles must be computed at not less than 90va per receptacle. A) one B) two C) three D) four
D) four 220.14(I)
In which application is the installation of NM cable permitted? A) in Type III construction B) in motion picture studios C) as service entrance cables D) embedded in poured cement
A) in Type III construction 334.10(1)
When the disconnecting means of a transformer is located remotely it must be _______. A) lockable B) protected C) accessible D) enclosed in a vault
A) lockable 450.14 & 110.25
Metal enclosures for over current devices in damp or wet locations, shall be mounted so that there is at least a ________in. air gap between the wall and the other support surface. A) 1/8 B) 1/4 C) 3/8, or D) 1/2.
B) 1/4 240.32, 312.2
in a washdown area a metallic raceway shall be shaped not less that _____ of an inch from the walls. A) 1/8 B) 1/4 C) 1/2 D) 3/4
B) 1/4 300.6(D)
Cables with entirely nonmetallic sheaths are permitted to enter the top of a surface-mounted enclosure through one or more nonflexible raceways not less than 18" or more than ______ in length if all the requirements are met. A) 6' B) 10' C) 12' or D) 20'
B) 10' 312.5(C) Exception
Edison base or plug fuse circuits shall not exceed _____volts and not exceed ______amps. A) 120v and 15a B) 125v and 30a C) 240v and 40a or D) 480v and 45 a
B) 125v and 30a 240.51(A)
Where direct buried conductors or cables emerge from the ground, they shall be protected by enclosures or raceways. In no case shall the protection be required _______in. below unfinished grade. A) 12 B) 18 C) 24 D) 30
B) 18 300.5(D)(1)
Health care locations where flammable anesthetics are deployed, shall have the surrounding area considered to be Class 1 Division 1 that extends upward to a level of _____ft from floor level. A) 3 B) 5 C) 7 or D) 10
B) 5 517.60(A)(1)
A circuit-breaker is not marked with an interrupting rating. What is it assumed to be rated at? A) 15A B) 5,000A C) 100A, or D) 200A
B) 5,000A 240.83(C)
Appliance outlets (such as electric dryers) shall be installed within _____ft of intended appliance location. A) 2 B) 6 C) 8 or D)10
B) 6 210.50(C)
When installed in the same cable tray, cables operating at over 1000 volts shall be of which type? A) AC B) MC C) MV or D) TC
B) MC 392.20(B)(1)
Small appliance branch circuits shall NOT supply? A) Water pump B) Switched light circuit C) Gas ignitor, or D) Electric clock.
B) Switched light circuit. 220.52
Where are flat cable assemblies permitted to be installed? A) in hoist-ways B) in exposed locations C) on escalators and elevators D) in 35A branch circuits
B) exposed locations 322.10
How many additional volt-amperes need to be added per every two feet of track lighting? A) 50 B) 100 C) 150 D) 200
C) 150 220.43(B)
What is the maximum continuous current allowed on a 20a branch circuit? A) 12A B) 14A C)16A or D) 18A
C) 16A 210.19(A)(1)
What is the minimum and maximum allowed length for a garbage disposer whip? A) 12-24 inches B) 16-28 inches C) 18-36 inches or D) 24-48 inches?
C) 18-36 inches 422.16(B)(1)(2)
Concrete encased grounding electrodes shall have a minimum length of _______ft and minimum diameter of ________in. A) 10ft and 1/2 inch B) 15ft and 5/8 inch C) 20ft and 1/2 inch, or D) 25ft and 5/8 in.
C) 20 feet and 1/2 inch diameter. 250.52(A)(3)(1)
The minimum fire rating for electrical vaults housing electrical equipment over 600 volts, nominal is? A) 1 hour B) 2 hours C) 3 hours or D) 4 hours
C) 3 hours 110.31(A)(1)
Electrical loads for a structural addition over _____sq feet to an existing dwelling unit, requires a re-calculation of the electrical service load. A) 100 B) 200 C) 500 or D) 1,000
C) 500 sq feet 220.16(A)(1)
The disconnecting means for each supply permitted by 225.30 shall consist of not more than _____ switches or breaks. A) 4 B) 5 C) 6, or D) 7.
C) 6 225.33(A)
Exit signs, when required, shall have lettering that is a minimum of how many inches high? A) 2 inches B) 4 inches C) 6 inches or D) 8 inches
C) 6 inches NFPA 101 7.10
All grounding pipe and rod electrodes must have at least ________ft in contact with the soil. A) 7 B) 7 1/2 C) 8 or D) 10
C) 8 250.53(G)
Excluding exceptions, communications wires shall have a vertical clearance of not less than how many feet from all points of roofs above which they pass? A) 4 feet B) 6 feet C) 8 feet or D) 10 feet
C) 8 feet 800.44(B)
Which type of service-entrance conductors can be contained in a cable tray? A) MI cable B) FC cable C) AC cable or D) NM cable
C) AC Cable 321.10(2)
A lamp holder is supplied by a circuit over 20 amps. What type of lamp holder is permitted? A) Medium base B) Light duty C) Heavy duty, or D) Extra heavy duty.
C) Heavy duty 210.21(A)
When utilized as outside branch circuits and feeders, overhead conductors for 600v or less, for spans up to 50 feet, shall not be less than _____copper. A) No. 14 B) No. 12 C) No. 10 or D) No. 8.
C) No. 10 225.6(A)(1)
The number of conductors allowed in LFNC must NOT exceed that permitted in _____? A) Table 7 B) Appendix D C) Table 1 D) Table 4
C) Table 1 356.22
The ampacity of capacitor circuit conductors must not be less than _____ of capacitor current. A) 80% B) 100% C) 125% or D) 135%
D) 135% 460.8(A)
Alternating-current systems of less than 50 volts shall be grounded where supplied by transformers, if the transformer supply system exceeds which of the following? A) 75 volts to ground B) 100 volts to ground C) 125 volts to ground, or D) 150 volts to ground
D) 150 volts to ground 250.20(A)(1)
How many volt-amperes are calculated per 1ft of show window? A) 50 B) 100 C) 150, or D) 200
D) 200 220.14(G)(2)
