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Electric Year 1 > NEC 90, 110 and 300 > Flashcards

NEC 90, 110 and 300 Flashcards

1
Q

The term “rainproof” is typically used in conjunction with enclosure type(s) _____.

A

NEMA 3R and 3X

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2
Q

Raintight enclosures include

A

types 3, 3S 3SX, 3X, 4, 4X, 6, and 6P

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3
Q

Rainproof enclosures are types

A

3R and 3RX

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4
Q

Watertight enclosures are types

A

4, 4X, 6, and 6P

Table 110.28 Informational Note No. 1

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5
Q

Driptight enclosures are types

A

2, 5,12,12K, and 13.

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6
Q

Dustight enclosures are

A

types 3, 3S, 3SX, 3X, 4, 4X, 5, 6, 6P, 12, 12K, and 13

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7
Q

Define approved

A

Acceptable to the authority having jurisdiction

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8
Q

What word means acceptable to the authority having jurisdiction

A

approved

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9
Q

Define Identified (as applied to equipment)

A

Recognizable as suitable for the specific purpose, function, use, environment, application, and so forth, where described in a particular code requirement

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10
Q

what does it mean to be recognizable as suitable for the specific purpose, function, use, environment, application, and so forth, where described in a particular code requirement

A

Identified (as applied to equipment)

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11
Q

Define Labeled

A

Equipment or materials to which has been attached a label, symbol, or other identifying mark of an organization that is acceptable to the authority having jurisdiction and concerned with product evaluation, that maintains periodic inspection of production of labeled equipment or materials, and by whose labeling the manufacturer indicated compliance with appropriate standards or performance in a specified manner

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12
Q

What does it mean to be equipment or materials to which has been attached a label, symbol, or other identifying mark of an organization that is acceptable to the authority having jurisdiction and concerned with product evaluation, that maintains periodic inspection of production of labeled equipment or materials, and by whose labeling the manufacturer indicated compliance with appropriate standards or performance in a specified manner

A

Labeled

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13
Q

Define listed

A

Equipment, materials or services included in a list published by an organization that is acceptable to the authority having jurisdiction and concerned with evaluation of products or services, that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services, and whose listing states that either the equipment, materials or service meets appropriate designated standards or has been tested and found suitable for a specified purpose

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14
Q

What does equipment, materials or services included in a list published by an organization that is acceptable to the authority having jurisdiction and concerned with evaluation of products or services, that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services, and whose listing states that either the equipment, materials or service meets appropriate designated standards or has been tested and found suitable for a specified purpose mean?

A

Listed

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15
Q

Installations of communications equipment under the exclusive control of communications utilities located outdoors or in building spaces used exclusively for such installations _____ covered by the NEC. (Are, Are sometimes, Are not, may be)

A

Are not

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16
Q

Underground cable and conductors installed under a building shall be _____.

A

in a raceway 300.5(C)

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17
Q

The minimum cover requirement for Type UF cable that supplies a 120V, 15A GFCI-protected circuit under a driveway of a one-family dwelling is _____.

A

12 in. Table 300.5(A) column 4

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18
Q

Where can you find minimum cover requirements for raceways and conductors for circuits rated 1000 Volts or lower?

A

Table 300.5A

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19
Q

Wiring located within the cavity of a fire-rated floor-ceiling or roof-ceiling assembly shall not be secured to, or supported by, the ceiling assembly, including the ceiling support _____. (wires, hangers, rods, none of these)

A

wires 300.11(B)(1)

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20
Q

Where Type NM cables pass through cut or drilled slots or holes in metal members, the cable shall be protected by _____ which are installed in the opening prior to the installation of the cable and which securely cover all metal edges. (anti-short devices, sleeves, plates, listed bushings or grommets)

A

listed bushings or grommets 300.4(B)(1)

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21
Q

What table can you find conductor applications and insulation rated 600 Volts?

A

Table 310.4(1)

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22
Q

The minimum working space on a circuit for equipment operating at 120V to ground, with exposed live parts on one side and no live or grounded parts on the other side of the working space, is _____.

A

3 ft

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23
Q

A NEMA Type 1 enclosure is approved for the environmental condition where _____ might be present. (Falling dirt, falling liquids, circulating dust, settling airborne dust)

A

falling dirt

24
Q

What table can you find enclosure selection and requirements for various environments?

A

Table 110.28

25
Q

When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be suitably _____. (Accessible, guarded, open, closed)

A

Guarded 110.26(B)

26
Q

A PVC raceway covered in 2 in. of concrete is required to have a minimal buried depth of _____. (6 in, 12 in, 18 in, 24 in)

A

12 in Table 300.5(A) column 3

27
Q

If a disconnecting means is required to be lockable open elsewhere in the NEC, it shall be capable of being locked in the open position. The provisions for locking shall remain in place with or without _____. (the power off, the lock installed, supervision, a lock out tag)

A

The lock installed 110.25

28
Q

Where electrical equipment is installed under metal-corrugated sheet roof decking, the 1½-in. spacing is not required where metal-corrugated sheet roof decking is covered with a concrete slab with a minimum thickness of _____, measured from the top of the corrugated roofing. (1/2 in, 1 in, 1 1/2 in, 2in)

A

2 in 300.4(E) Ex 2

29
Q

Pressure terminal or pressure splicing connectors and soldering lugs shall be _____ for the material of the conductor and shall be properly installed and used. (listed, approved, identified, all of these)

A

Identified 110.14

30
Q

Conductors of dissimilar metals shall not be intermixed in a terminal or splicing connector where physical contact occurs between dissimilar conductors unless the device is _____ for the purpose and conditions of use. (Approved, listed, identified, designed)

A

identified 110.14

31
Q

For a dwelling location, direct buried cables that are GFCI protected at no more than 20A shall have a cover of _____. (6in, 12in, 18 in, 24 in)

A

12 in table 300.5(A) column 4

32
Q

Type UF cable used with a 24V landscape lighting system can have a minimum cover of _____. (6in, 12in, 18in, 24in)

A

6 in (table 300.5(A) column 5)

33
Q

When installed under metal-corrugated sheet roof decking, _____ and intermediate metal conduit, with listed steel or malleable iron fittings and boxes, shall not be required to comply with 300.4(E). (rigid metal conduit, electric metal tubing, Schedule 80 PVC, all of these)

A

Rigid metal conduit 300.4(2)(E) exception No. 1

34
Q

When installing PVC underground without concrete cover, there shall be a minimum of _____ of cover. (6, 12, 18, 24)

A

18 inches. Table 300.5(A) column 3

35
Q

Fittings and connectors shall be used only with the specific wiring methods for which they are _____ and listed. (designed, identified, marked, labeled)

A

designed 300.15

36
Q

_____, and access to and egress from working space, shall be provided and maintained about all electrical equipment to permit ready and safe operation and maintenance of such equipment. (Ventilation, Unrestricted movement, Circulation, Working Space)

A

Working Space 110.26

37
Q

Where corrosion protection is necessary and the conduit is threaded anywhere other than at the factory where the product is listed, the threads shall be coated with a(an) _____ electrically conductive, corrosion-resistant compound. (Marked, Listed, Labeled, Approved)

A

approved 300.6(A)

38
Q

Working space distances for enclosed live parts shall be measured from the _____ of equipment if the live parts are enclosed. (enclosure or opening, front or back, mounting pad, footprint)

A

enclosure or opening 110.26(A)(1)

39
Q

Access to or egress from the required working space about electrical equipment is considered impeded if one or more simultaneously opened equipment doors restrict working space access to be less than _____ wide and 6½ ft high. (24, 28, 30, 36)

A

24 (110.26)

40
Q

Raceways may be used as a means of support where the raceway contains power-supply conductors for electrically controlled equipment and is used to _____ Class 2 or Class 3 circuit conductors or cables that are solely for the purpose of connection to the equipment control circuits. (Support, Secure, Strap, none of these)

A

support 300.11(C)(2)

41
Q

The required working space for access to live parts of equipment operating at 300V to ground, where there are exposed live parts on both sides of the workspace is _____. (3ft, 3.5ft, 4ft, 4.5ft)

A

4ft 110.26(A)(1) and Table 110.26(A)(1) Condition 3

42
Q

Installations used to export electric power from vehicles to premises wiring or for _____ current flow is covered by the NEC. (emergency, primary, bidirectional, secondary)

A

bidirectional 90.2(C)(6)

43
Q

Raceways, cable assemblies, boxes, cabinets, and fittings shall be _____ fastened in place. (Securely, supported and, approved as, none of these)

A

Securely 300.11(A)

44
Q

The minimum cover requirement for Type UF cable that supplies a 120V, 30A circuit is _____. (6, 12, 18, 24)

A

24 inches. table 300.5(A) column 1

45
Q

Type MC Cable _____ for direct burial or concrete encasement shall be permitted under a building without installation in a raceway in accordance with 330.10(A)(5).

A

listed 300.5(C) Ex 2

46
Q

Raceways shall be provided with expansion, expansion-deflection, or deflection fittings where necessary to compensate for thermal expansion, deflection, and _____.

A

contraction 300.7(B)

47
Q

The NEC does not cover installations in _____. (Ships and watercraft, mobile homes, recreational vehicles, any of these)

A

Ships and water craft 90.2(D)(1)

48
Q

Where can you find installations where the NEC does not cover?

A

90.2(D)

49
Q

Electrical equipment shall be installed _____. (In a professional and skillful manner, under the supervision of a licensed person, completely before being inspected, all of these)

A

in a professional and skillful manner 110.12

50
Q

Equipment that is _____ or identified for a use shall be installed and used in accordance with any instructions included in the listing, labeling, or identification. (listed labeled or both, listed, marked, suitable)

A

listed labeled or both 110.3(B)

51
Q

Electrical metallic tubing that is directly buried under a two-family dwelling driveway shall have at least _____ of cover.

A

18 inches Table 300.5(A) column 3

52
Q

“Exposed (as applied to _____),” is defined as on or attached to the surface, or behind access panels designed to allow access. (equipment, luminaires, wiring methods, motors)

A

wiring methods

53
Q

Annexes are not part of the requirements of this Code but are included for _____ purposes only. (informational, reference, supplemental enforcement, educational)

A

informational 90.3

54
Q

Enclosure Type 3X for switchboards, switchgear, or panelboards located outdoors are suitable in locations subject to _____. (rain, windblown dust, corrosive agents, any of these)

A

any of these 110.28 and Table 110.28

55
Q

Where portions of cable raceways or sleeves are required to be sealed due to different temperatures, sealants shall be identified for use with _____, a bare conductor, a shield, or other components. (low temperature conditions, high temperature conditions, a stranded conductor, cable insulation or conductor insulation)

A

cable insulation or conductor insulation 300.7(A)

56
Q

The requirements of Article 300 are not intended to apply to the conductors that form an _____ part of equipment or listed utilization equipment.
exterior
integral
interior
none of these

A

integral 300.1(B)

Electric Year 1 (18 decks)

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