Code Standards and Practices 2 - Level 2 Study Guide #1 and 2
Without using any exeptions, generally, the smallest aluminum conductor permitted to be connected in parallel is _________. a. 1 / 0 b. 2 / 0 c. 3 / 0 d. 4/ 0
a. 1 / 0
Insulated conductor types THHN and THWN are permitted for which selected locations? a. both dry and damp locations b. both damp and wet locations c. both dry and wet locations d. wet location only
a. both dry and damp locations
Where the ends of liquid tight flexible metal conduit (Type LFMC) are out of round, the ends must be repaired. Instead the conduit must be cutback to a point where the conduit is round. There are many reasons for this requirement. but the most important reason for this new cut back is to maintain the ... a. grounding means of the conduit b. internal diamter for wire fill c. external diameter for connector use b. conduit strenght
a. grounding means of the conduit
Electrical nonmetallic tubing ( Type ENT) and all associated fittings shall be _________. a. listed b. labeled c. identified d. certified
a. listed
The interior of all underground raceways using over 1000V shall be considered a ________ location. a. wet b. moist c. dry d. damp
a. wet
Generally, 15 kV cables may be installed in type EMT, RMC, IMC, PVC, and RTRC conduits in above ground installations. Where these circuits must be extended to equipment using other wiring methods, which of the following is NOT permitted to extend these 15 kV circuits? a. wireway b. busway c. Auxiliary gutter d. cable bus
a. wireway
Except as permitted elsewhere in the NEC, the minimum size of copper conductor rated 0 - 2000 volts according to Part III of article 310, Conductors for General use is ________ AWG. a. 12 b. 14 c. 16 d. 18
b. 14
Article ____ covers the installation of low-voltage suspended ceiling power distribution systems. a. 411 b. 393 c. 310 d. 300
b. 393
Boxes used to luminare or lampholder outlets on a veritcle surface shall be identified and marked on the interior of hte box to indicate the maximum weight of the luminaire that is permitted to be supported by the box if other than ________. a. 65 lbs b. 50 lbs c. 30 lbs d. none of these
b. 50 lbs
Type RTRC conduit is generally not permitted to be used where subject to physical damage. From the following list, what is the specific marking on type RTRC conduit which specifically permits RTRC conduit to be used where subject to physical damage. a. AG b. XW c. GB d. DB
b. XW
The primary purposes of insulated shielding is to confine voltage stress to the ________. dissipate insulation leakage current, drain off capacitive current and carry ground fault current to facilitate operation of the ground fault protection devices. a. conductor b. insulation c. circuit d. cable sheath
b. insulation
Conductors and cables exposed to direct sunlight shall be listed, or _____ and marked as being sunlight resistant. a. certified b. listed c. identified d. certified
b. listed
Conductors and cables exposed to direct sunlight shall be listed, or __________ and marked as being sunlight shall be listed, or ________ and marked as being sunlight resistant. a. labeled b. listed c. certified d. identified
b. listed
Direct burial cables for use in circuits over 1000 volts nominal shall be permitted to be spliced or tapped without the use of splices boxes, provided they are installed using materials suitable for the application. The taps and splices shall be _______ and protected from mechanical damage. a. water resistant b. watertight c. waterproof d. moisture resistance
b. watertight
A 120 V , GFCI protected, 20 ampere branch circuit is installed in Type UF cable. The cable passes under a one- family dwelling driveway. The minimum burial depth for the UF cable is ________. a. 24 inches b. 18 inches c. 12 inches d. 6 inches
c. 12 inches
A 120V, GFCI protected, 20 ampere residential branch circuit is installed underground in type UF cable. The cable passes under an alley. The minimum burial depth for the UF cable is _______. a. 6 inches b. 14 inches c. 24 inches d. 30 inches
c. 24 inches
In general, liquid tight, flexible nonmetallic conduit shall not be used in lengths longer than _________ ft. a. 10 b. 12 c. 6 d. 4
c. 6
Which of the following wiring methods is NOT permitted to be used as interior wiring? a. SE Cable b. UF Cable c. USE Cable d. AC Cable
c. USE Cable
In general, metal or nonmetallic raceways, cable armors, and cable sheaths shall ______ between cabinets, boxes, fittings, or other enclosures or outlets. a. exposed b. concealed c. continuous d. accessible
c. continuous
The term _______ is defined as the shortest distance in inches measured between a point on the top surface of any direct-buried conductor, cable, conduit or other raceway and the top surface of finished grade, concrete, or something similar. a. trench b. deepness c. cover d. burial depth
c. cover
Electrical ______ are defined as electrical conduits, or other raceways round in cross section, that are suitable for use underground or embedded in concrete a. raceways b. tubing c. ducts d. conduits
c. ducts
In general , LFNC shall not be used in lenghts longer than ________. a. 24 ft b. 12 ft c. 18 ft d. 6 ft
d. 6 ft
Which of the following is not defined as a raceway? a. Rigid non-metallic conduit b. ENT c. Cellular concrete floor raceway d. Auxiliary gutter
d. Auxiliary gutter
Definitions and listing requirements for conduits and raceways are generally found in which part of their article. a. Part IV b. Part III c. Part II d. Part I
d. Part I
Listing requirements for NEC cable wiring methods may be found in which part of their appropriate Chapter 3 article. a. Part IV b. Part III c. Part II d. Part I
d. Part I
Where a rigid PVC conduit enters a box, fitting, or other enclosure, a (n) ________ or adapter shall be provided to protect the wire from abrasion unless the box or fitting, or enclosure design provides equivalent protection. a. coupling b. jacket c. sheathe d. bushing
d. bushing
Where type IMC conduit is being bent into a radius of a certain size, the critical measurement is always made from the the center point of the radius to the _______of the conduit. a. center point b. inside edge c. nearest edge d. centerline
d. centerline
Generally , which installation below would be permissible by the NEC for the use of electrical nonmetallic tubing? a. where subject to physical damage b. where exposed to direct sunlight c. direct burial d. concealed within walls, floors or ceilings
d. concealed within walls , floors, and ceilings
In general, conductors in raceways shall be ______ between outlets, boxes, or other enclosures. a. labeled b. identified c. grounded d. continuous
d. continuous
During the selection of conduit ampacity, where more than ampacity applies for a given circuit length, the _________ value shall be generally be used. a. table b. average c. highest d. lowest
d. lowest
