NEC
Non metallic auxiliary gutters shall have expansion fitting installed where the expected length change due to expansion and contraction due to temperature change is more than ________ inches. 366.14
0.25
Wood braces shall have a cross section of not less than _______ inches. 314.23(2)
1
The voltage computed on the basis of 2 volts per cell for the lead-acid type and ____________ volts per cell for the alkali type. 480.2
1.2
Cellular concrete floor raceways shall have no conductor larger than _____ awg installed in the raceway. 372.10
1/0
Nail and screws, where used as a fastening means, shall be attached by using brackets on the outside of the enclosure, or they shall pass through the interior within __________ inches of the back or ends of the enclosure. 314.23(1)
1/4
Where flexible tubing is used to enclose the conductors, the tubing shall extend from the last insulating to not less than _________ inches. 314.18(c)
1/4
In dwelling units, hallways of _____ feet or more in length shall hace a least one receptacle outlet. 210.60(h)
10
In no case shall the point of attachment for overhead service- drop conductors be less than _______ feet above fenish grade. 230.26
10
Low voltage equipment that is frequently in contact with the bodies of person or has exposed current carrting elements shall operate on an electrical potential of ______ volts or less. 517.64
10
emergency syatem shall be automatically restored to operation within __________ seconds after interruption of normal source. 517.31
10
Operating at over _________ volts metal faceplates, shall be permitted to be grounded by means of metal mounting screws. 517.13 (B)
100
Arc equipment that is less _________ feet above the floor level and that may produce arcs, sparks, or particles of hot metal. 511.7 (b)(1)(a)
12
Lamps and lamp-holder for fixed lighting that is located over lanes through which vehicles are commonly driven shall not be less than ________ feet above the floor level. 511.7(b)(1)(b)
12
Type FMC shall be surely fastened in place by an approved means, within __________ inches of each box 348.30
12
Shielded conductors shall have _______ times the overall diameter of one of the individual conductors or _________ times the overall diameter of the multi-conductor cable, whichever is greater. 320.24(c)
12-7
Outlet boxes intended to enclose flush devices shall have internal depth of not less than _______ inch. 314.24
15/16
A load not less than _______ volt-amperes shall be included for each 2-wire laundry branch circuit installed as required. 220.52(b)
1500
In each dwelling unit, the load shall be computed at _______ volt-amperesfor each 2-wire small appliance branch circuit required. 220.52(a)
1500
Counduit seals shall be installed within __________ from the enclosure. 501.15 (1)
18
Receptale outlets in floors shall not be counted as part of the required number of receptacle outlet unless located within ______ inches of the wall. 210.52(4)
18
Type RMC shall be permitted to be installed in or under cinder fill not less than _________ inches. 344.13(c)
18
A required 125-volt, 15- and 20- amp receptacle in dwelling units shall be installed in any wall space ______ feet or more in width. 210.52.2.1
2
In Class I - Division 1 locations, the entry shall be metric designator trade size ___________ or larger and the enclosure contains terminals splices, ot taps. 501.15
2
Underground wiring shall be installed in threaded rigid metal conduit or threaded stell intermediate metal conduit or, where buried under not less than _______ feet. 515.8
2
An enclosure that contains a device (s) shall have a weight supported by a single conduit that does not exceed ________ lbs. 314.23(f)(e)
20
Emergency control shall be installed at a location acceptable by the authority having jurisdiction, by the control shall be more than ________ feet from the dispensers and emergency controls shall shut off all power to all dispensing equipment. 514.11 (C)
20
Plate electrodes shall be exposed not less than ______ inches below the surface of the earth. 250.53(7)
24
For equipment rated 1200 amperes or more and over 6 feet wide that contain over- current devices, there shall be one entrance not less than ______________ inches wide and _________ feet high at each end of the working space. 110.26(c)(2)
24 - 6 1/2
One receptacle outlet shall be installed at an accessible location for the servicing of heating, air conditioning, and refrigeration within ______ feet and on the same level as the equipment. 210.63
25
For spraying operations confined to an enclosed spray booth or room, the space within _________ feet in any direction from any opening shall be considered Class 1 or Class 2 516.3 (4)
3
The RMC shall be securely fastened within __________ feet of each outlet box, junction box, device box, and cabinet. 344.30(a)
3
To facilitate replacements, process control instruments shall be permitted to be connected through flexible cord, the power-supply cord shall not exceed __________. 501.105
3
When type IMC conduit is conduit is treaded in the field, a standard cutting die with a taper of 1 in 16 _________ per foot shall be used. 342.28
3/4
An auxiliary gutter shall not extend a greater distance than __________ beyond the equipment it supplement. 366.12
30 ft
Type MV cable shall be permitted for used on power systems rated up to _________ volts in raceway, wet and dry locations. 328.10
35,000
In class I Division 2 location where the enforcing agency determines that there is mechanical ventilation providing a minimum of ______________ air change per hour. 511.3 (c)(1)
4
Pull and junction boxes for raceways containing conductors and for cables containing conductors the minimum shall be a _________ awg. 314.28(a)
4
The maximum size of EMT tubing shall be metric trade size __________. 358.20
4
There shall be more than the equivalent of ____________ quarter bends 360 degrees total between pull point, for example, conduit bodies and boxes. 344.28
4
Type AC cable shall be secured by only staples, cable tie, hangers or fittings at intervals not exceeding _________ feet. 320.30(b)
4 1/2
The combined cross sectional area of all conductors or cables shall not exceed ______ percent of the cross sectional are of the cell or header. 372.11
40
Bending radius in type AC shall be made not to be damaged and of the curve of the inner edge of any bend shall not be less than _________ times in diameter of the cable. 325.24
5
In Class I - Division 2 at motor fuel dispensing facilities or commercial garages the distance shall have least _______ feet of ant edge, extending in any direction. 514.3 (B)(2)
5
Interior metal water piping located more than ______ feet from the point of entrance to the building shall not be used as part of the grounding electrode system.
5
X-ray installations, momentary rating based on an operating interval that does not exceed ________ seconds. 517.2
5
X-ray installed long time rating based on an operating interval of _________ minute or longer. 517.2
5
In a completed seral, the minimum thickness of the sealing shall in no case be less than __________ inch. 501.15 (c)(3)
5/8
The load for house electric clothes dryers in a dwelling unit(s) shall be ________ watts (volt-amps) or the nameplate rating, whichever is larger, for each dryer served. 220.54
5000
Appliance receptacle outlets installed in a dwelling unit for specific appliances, such as laundry equipment, shall be installed within _______ feet of the intended location of the appliance. 210.50(c)
6
Cable-bus shall be permitted to extend vertically through dry floor and platforms, provided the cable-bus is totally enclose at the point where it passes through the floor or platform for a distance of ________ feet above the floor platform. 370.6(C)
6
Interior stairs shall have switches at the end, where the stairway between floor levels has _____ risers or more. 210.70(2)(c)
6
Required 125-volt, 15- and 20 ampere receptacles in dwelling units shall be installed so tat at no point measured horizontally along the floor line in any wall space is more than ______ feet from a receptacle outlet. 210.52
6
The length of the suitable coat and cable assemblies approved for extra hard usage for branches from bus-ways for the connection of equipment shall not exceed ________ feet. 368.17(b)(7)
6
The space equal to the width and depth of epuipment and extending from the floor to the height of ________ feet above the equipment or to the structural ceiling whichever is lower, shall be dedicated to the electrical installation. 110.26(a)(3)
6
Where the supplemental electrode is a rod, pipe, or plate electrode, that portion of the bonding jumper that is the sole connection to the supplemental grounding electrode shall not be required to be larger than _____ awg copper wire. 250.53(e)
6
Type AC cable when run across the top of floor joists, or within _________ feet of floor and across the face of rafters the cable shall be protected. 320.23(a)
7
Luminaries (light fixtures) more than _______ feet above the floor and switch located outside. 517.13(B)
7 1/2
In straight pulls, the length of the box shall not be less than _______ times of the largest raceway. 314.28(1)
8
Overhead service drop conductors shall not be smaller than ______ awg copper. 230.24(b)
8
Overhead service-drop conductors shall have a vertical clearance od not less than ______ feet above the roof serface. 230.24 (a)
8
Rod and pipe electrodes shall not be less than _______ feet in length. 250.53(5)
8
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. 314.18(c)
8
Elecctrically heated utilization equipment shall not exceed _________ percent of the ignition temperature in degree of the gas or vapor. 501.135
80
Protective techniques shall be acceptable for electrical and electronic equipment in hazardous (classified) sealed locations. 500.7 (J)
Class 1 - Division 2
Flammable gas, flammable liquid-produced vapor, or combustible liquid-produced vapor mixed with air the may burn is in ______________ material that is hydrogen 500.6 (2)
Class 1 - Group B
Any pit or pedression below floor level shall be considered to be a ____________ location. 511.3 (c)(3)
Class I - Division 1
The interior of spray booths and areas in the vicinity of spraying anf painting are in _______________. 500.5 (B)(1)(2)
Class I - Division 1
Threaded rigid metal conduit or threaded steel in ________ locations shall be used for the last 24 inches of the underground run to emergence. 501.10
Class I - Division 1
Areas not cut off for ventilation from aircraft hanger, shallbe classified as a _________________ or zone 2 location up to a level of 18 inches above the ground. 513.3(b)
Class I - Division 2
Cable passing from an enclosure or room that is unclassified as a result of type z pressurization into a ____________ shall not require a seal at the boundary. 501.17 (e)
Class I - Division 2
Conduit syatems passing from an enclosure or room that is unclasssified as a result of pressurization into a _______________ location shall not require a seal at the boundary. 501.15 (2)
Class I - Division 2
Where electrical diagnostic equipment are to be used it shall have _____________ protection for personal. 511.12
GFI
Type RNC shall not be used for the support of ___________ or any other equipment. 352.11(h)
Luminaries (fixtures)
In industrial establishments with limited public access, where the conditins of maintance and supervision ensure that only qualified persons service the installation of type ________ cable shall be permitted. 501.10 (3)
MC
Seals in conduit and cable, sealing compound be used in type MI cable termination fittings to exclude ____________ and other fluids from the cable insulation. 501.15
Moisture
A circuit which any arc or thermal effect produced under intended operating conditions of the equipment is not capable. 500.2
Non-incendive circuit
A single panel or group of panels units designed for assembly in the form of a single panel, including buses and automatic over-current devices, and equipped with or without switches for the control of light, heat or power circuits. 100 definations
Panel board
An enclosed channel of metal or nonmetallic materials designed expressly, with additional functions as permitted in this code. 100 def.
Raceway
In each conduit run passing thru Class 1 - Division 2 locations into an unclassified location shall be _____________ at the boundary. 501.15
Seal
The overhead service conductors from the last pole or other aerial support to and including the splices, if any, connection to the service-entrance conductors at the building or other structure. 10 def.
Service conductor
For use underground, including direct burial in the earth, type _______ cable is permitted. 340.10
UF
All threaded conduit shall be made __________ to prevent sparking when fault current flows through the conduit system and to ensure the explosion proof of flameproof integrity of the conduit system where applicable. 500.7 (e)
Wrench-tight
Junction boxes shall be installed so that the wiring is _________ without removing any part of the building. 314.72(d)
accessible
Class II locations are those tha are hazardous because of the presence of ________________. 500.5 (C)
combustible dust
Life safety branch of the emergency systemshall supply power for all of the following except: ________________. 517.32
critical systems
The identification of terminals to which grounded conductor is to be connected shall be substantially _______________ in color 250.126
green
Frames of switchgear and control assemblies shall be _____________. 490.36
grounded
Type NUCC shall not be used in the following areas _____________. 352.12
inside building
A subsystem of the emergency system consisting of feeders and branch circuits is a _____________. 517.2
life safely branch
Electrical equipment immersed in a protective liquid in such a way that an explosive atmosphere the may be above the liquid or outside the enclosure cannot be ignited. 500.2
oil immersion
Bus-ways shall be permitted to be _______________ and are visible. 368.10
open
Class II equipment shall be marked to show the class, group and ___________ temperature. 500.7 (4)
operating
Any portion of a health care facility where in-patient are intended to be examined or treated, is a ___________. 517.2
patient care area
Running threads __________ used on conduit for connection at couplings. 344.42(a)
shall not be
The ENT _________ used where exposed to direct rays of the sun, unless identified as sunlight resistance. 362.12
shall not be
Service conductors supplying a building or other structure ________ thrugh the interior of another building or other structure. 230.3
shall not pass
________________ apparatus, as described on the control drawing, shall not be required to be listed. 504.4
simple
An electrical component that does not generate more than 1.5 volts, 100 milliamps, and 25 mill-watts is a _____________. 504.2
simple apparatus
Receptacles located within the patient care area of pediatric wards, room, or area shall be listed ___________ resistant cover. 517.18 (C)
tamper
A _________ barrier shall be requied if the space between the resistors and reactors and any combustible material 470.3
thermal
