National electrical code exam SkillsUSA Questions and Answers Updated 2026.

National electrical code
exam SkillsUSA Questions
and Answers Updated 2026 -
2027
racewayB-BAnswerBOverheadBserviceBentranceBcablesBshallBbeBequippedBwithBa__

a)BracewayB

b)BserviceBheadB

c)BcoverB

d)BallBofBthese



TheBcableBandBconductorBinsulationB-
BAnswerBWhereBportionsBofBcableBracewaysBorBsleevesBareBrequiredBtoBbeBsealedBd
ueBtoBdifferentBtemperatures,BsealntsBshallBbeBidentifiedBforBiseBwithB__B,BaBbareBco
nductor,BaBshield,BlrBotherBcomponents.B

a)BlowBtemperatureBconditionsB

b)BhighBtemperatureBconditionsB

c)BaBstandardBconductorB

d)BtheBcableBandBconductorBinsulation



GroundingBelectrodesB-
BAnswerBGroundingBconductorBconnectionsBtoB__BforBcommunicationsBsystemsBshallB
complyBwithB250.70B

a)BgroundBrodsB

b)BbondingBjumpersB

c)BequipotentialBplanesB

d)BgroundingBelectrodes



GeneralBuseBretrofitB-
BAnswerBABkitBconsistingBofBprimaryBparts,BwhichBdoesBnotBincludeBallBtheBpartsBfor

,BaBcompleteBsubassemblyBbutBincludesBaBlistBofBrequiredBpartsBandBinstallationBinstr
uctionsBtoBcompleteBtheBsubassemblyBforBaBsignBinBtheBfieldBisBcalledBaB"__kit"B

a)BgeneralBuseBretrofitB

b)BreconditioningB

c)Bmaintenance

d)BsignBspecificBretrofit



SixB-
BAnswerBTheBmaximumBnumberBofBdisconnectsBforBeachBPVBsystemBshallBconsistBofB
notBmoreBthanB__BswitchesBorB__BsetsBofBcircuitBbreakers,BorBaBcombinationBofBnot
BmoreBthanB__BswitchesBandBsetsBofBcircuitBbreakers,BmountedBinBaBsingleBenclosure
,BorBinBaBgroupBofBseparateBenclosures.B

a)BoneB

b)BsixB

c)BeightB

d)Btwelve



BipolarBcircuitB-
BAnswerBABdcBcircuitBthatBisBcomprisedBofBtwoBmonopoleBcircuits,BeachBhavingBanB
opposingBpolarityBconnectedBtoBaBcommonBreferenceBpointBisBknownBasBaB"__."B

a)BbipolarBcircuitB

b)BpolarBphotovoltaicBarrayB

c)BbipolarBcircuitBorBpolarBphotovoltaicBarrayB

d)BbidirectionalBcircuit



IdentifiedBclosuresB-
BAnswerBUnusedBopeningsBforBcircuitBbreakersBandBswitchesBinBswitchboardsBandBpa
nelBboardsBshallBbeBclosedBusingB__B,BorBotherBapprovedBmeansBthatBprovideBprotec
tionBsubstantiallyBequivalentBtoBtheBwallBofBtheBenclosure,B

a)BductBandBsealBtapeB

b)BidentifiedBclosuresB

, c)BexothermicBweldingB

d)BsheetBmetal



NeutralB-
BAnswerBA(n)B__BconductorBthatBcarriesBonlyBtheBunbalancedBcurrentBfromBotherBco
nductorsBofBtheBsameBcircuitBshallBnotBbeBrequiredBtoBbeBcountedBwhenBapplyingBth
eBprovisionsBofB310.15(c)(1).

a)BneutralB

b)BungroundedB

c)BgroundingB

d)Bbonded



314.3BExB1BorB2B-
BAnswerBWhereBnonmetallicBenclosuresBforBswitchesBareBusedBwithBmetalBracewaysB
orBmetalBarmoredBcables,BtheyBshallBcomplyBwithB__B

a)B314.12B

b)B314.3BExB1B

c)B314.3BExB2B

d)314.3BExB1BorB2



EquipmentBgroundingB-
BAnswerBLuminariesBandBlightingBequipmentBshallBbeBconnectedBtoBa(an)B__Bconduct
or.B

a)BgroundingBelectrodeB

b)BgroundedB

c)BequipmentBgroundingB

d)BanyBofBthese



12B-
BAnswerBReceptacleBoutletsBareBrequiredBforBkitchenBcountertopsBandBworkBsurfaces
B__Bin.BandBwiderB