Master Electrician Exam Review
Questions and Answers Updated 2026
branchAcircuitA-
AAnswerAThatAportionAofAaAwiringAsystemAextendingAbeyondAtheAfinalAovercurrentAdev
iceAisAcalledAthe:
CalculatedAloadA-
AAnswerATheAfinalAsumAofAtheAcomputedAloads,AbasedAonAtheAminimumAcodeArequire
ments,AisAthe
ResistanceA-AAnswerAAsAcomparedAtoA#10,AaA#8AwireAofAtheAsameAIengthAhasAless:
0.001AinchA-AAnswerAOneAcircularAmilAisAtheAareaAofAaAcircleAwhoseAdiameterAis:
1,000,000AcmA-AAnswerAAAroundAbus-
barAoneAinchAinAdiameter,AhasAaAcircularAmilAareaAof:
fourAtimesAasAgreatA-
AAnswerAAAcopperAwireAwithAtwiceAtheAdiameterAofAanotherAwireAhasAaAcurrentAcarr
yingAcapacity:
10.4A-
AAnswerATheAspecificAresistanceAofAcopperAwireA@A20°ACAinAohmsAperAcircularAmilA
ft.Ais
permitAcurrentAtoAflowA-
AAnswerAConductanceAofAanAelectricAcircuitAisAthatApropertyAthatAwill:
1OAohmsA-AAnswerATheAequivalentAvalueAofA0.1AmhoAis
directlyAproportionalAtoAitsAlengthA-AAnswerATheAresistanceAofAcopperAwireAis:
FeederA-
AAnswerATheAportionAofAaAwiringAsystemAbetweenAaApointAofAdistributionAandAtheAbr
anchAcircuitAovercurrentAdeviceAis
,lockingA-
AAnswerAGFCIAprotectionAatAaAcarnivalAisAnotArequiredAforAequipmentAatAcircuitAifAth
eAreceptacleAisAofAtheA____________type
notAlessAthanA1A1/4Ain.AfromA-
AAnswerAWhereAcablesAorAnonmetallicAracewaysAareAinstalledAthroughAbored.holesAinA
joists,Arafters,AorAwoodAmembers;holesAshallAbeAboredAsoAthatAtheAedgeAofAtheAhole
AisAtheAnearestAedgeA-ofAtheAwoodAmember.
locatedAonAaAbalconyAaccessibleAonlyAtoAqualifiedApersons
locatedAinAaAroomAonlyAaccessibleAto
qualifiedApersons
elevatedA8AftAorAmoreAaboveAfloorAorAotherAworkingAsurfaceA-
AAnswerAToAguardAliveApartsAoverA50VAbutAlessAthanA600V,AequipmentAisApermittedA
toAbe
12FtA-
AAnswerAOverheadAfeederAconductorsAshallAhaveAaAminimumA__________AverticalAclear
anceAoverAresidentialApropertyAandAdriveways,AasAwellAasAthoseAcommercialAareasAno
tAsubjectAtoAtruckAtraffic,AwhereAtheAvoltageAisAlimitedAtoA300Avolts-to-ground.
36AinchesA-AAnswerAWhereArearAaccessAisArequiredAtoAworkAonAde-
energizedApartsAonAtheAbackAofAenclosedAequipment,AaAminimumAworkingAspaceAofAh
orizontallyAshallAbeAprovided.
50'A-
AAnswerAWhatAisAtheAmaximumArunAlengthAofAaA18AWGAfixtureAwireAthatAisAtappedA
onAtoAaA20AampAbranchAcircuit?
powerAsupplyAfailureA-AAnswerAWhenAtheAserviceAdisconnectingAmeansAisAaApower-
operatedAswitchAorAcircuitAbreaker,AitAshallAbeAableAtoAbeAopenedAbyAhandAinAtheAe
ventAofAa
2AinAofAconcreteA-
AAnswerAConductorsAareAconsideredAoutsideAaAbuildingsAwhenAtheyAareAburiedAunder
AnotAlessAthan
, 8A-
AAnswerAInAstraightApull,AtheAlengthAofAtheAboxAshallAnotAbeAlessAthan.A____timesAt
heAtradeAsizeAofAtheAlargestAraceway.
18"A-
AAnswerAAtAleastAoneAreceptacleAoutletAshallAbeAinstalledAwithinAofAtheAtopAofAaAsh
owAwindowAforAeachA12AlinearAfeetAmeasuredAhorizontallyAacrossAitsAlength
1000AA-AAnswerAGround-
faultAprotectionAofAequipmentAshallAbeAprovidedAfroAsolidlyAgroundedAwyeAelectricalAs
ervicesAofAmoreAthanA150Avolts-to-ground,AbutAnotAexceedingA600VAphase-
to..phaseAforAeachAserviceAdisconnectingAmeansArated
18"A-
AAnswerAReceptacleAoutletsAinAfloorsAshallAnotAbeAcountedAasApartAofAtheArequired
numberAofAreceptacleAoutletsAunlessAlocatedAwithinA______AofAtheAwall
50VA-
AAnswerAExposedAliveApartsAofAmotorsAandAcontrollersAoperatingAatAorAmoreAbetween
AterminalsAshallAbeAguardedAagainstAaccidentalAcontactAbyAenclosureAorAbyAlocation
5'A-
AAnswerALightingAtrackAshallAnotAbeAinstalledAlessAthan______AaboveAtheAfinishedAflo
orAexcept'AwhereAprotectedAfromAphysicalAdamageAorAwhereAtheAtrackAoperatesAatAle
ssAthanA30AVArms,Aopen-circuitAvoltage
4A-
AAnswerAEachAgeneralAcareAareaApatientAbedAlocationAshallAbeAprovidedAwithAaAmini
mumAof_______receptacles,AwhichAcanAbeAsingle,Aduplex,AorAaAcombinationAwithAeach
AduplexAcountingAasAtwoAreceptacles
CombinationARangeAhood/AMicrowave
ovenA-
AAnswerAInAaADwellingAUnitAwhichAapplianceAisAallowedAtoAhaveAaA24"AcordAwithAat
tachmentAgroundAplug?
1A-AAnswerAAtAleast_____A125AV,AsingleAphase,A15AAAorA20AA,AduplexAwithAground-
faultAcircuitAinterrupterAreceptacleAshallAbeAprovidedAinAeachAelevatorAmachineAroomA
andAelevatorAmachineryAspace.
Questions and Answers Updated 2026
branchAcircuitA-
AAnswerAThatAportionAofAaAwiringAsystemAextendingAbeyondAtheAfinalAovercurrentAdev
iceAisAcalledAthe:
CalculatedAloadA-
AAnswerATheAfinalAsumAofAtheAcomputedAloads,AbasedAonAtheAminimumAcodeArequire
ments,AisAthe
ResistanceA-AAnswerAAsAcomparedAtoA#10,AaA#8AwireAofAtheAsameAIengthAhasAless:
0.001AinchA-AAnswerAOneAcircularAmilAisAtheAareaAofAaAcircleAwhoseAdiameterAis:
1,000,000AcmA-AAnswerAAAroundAbus-
barAoneAinchAinAdiameter,AhasAaAcircularAmilAareaAof:
fourAtimesAasAgreatA-
AAnswerAAAcopperAwireAwithAtwiceAtheAdiameterAofAanotherAwireAhasAaAcurrentAcarr
yingAcapacity:
10.4A-
AAnswerATheAspecificAresistanceAofAcopperAwireA@A20°ACAinAohmsAperAcircularAmilA
ft.Ais
permitAcurrentAtoAflowA-
AAnswerAConductanceAofAanAelectricAcircuitAisAthatApropertyAthatAwill:
1OAohmsA-AAnswerATheAequivalentAvalueAofA0.1AmhoAis
directlyAproportionalAtoAitsAlengthA-AAnswerATheAresistanceAofAcopperAwireAis:
FeederA-
AAnswerATheAportionAofAaAwiringAsystemAbetweenAaApointAofAdistributionAandAtheAbr
anchAcircuitAovercurrentAdeviceAis
,lockingA-
AAnswerAGFCIAprotectionAatAaAcarnivalAisAnotArequiredAforAequipmentAatAcircuitAifAth
eAreceptacleAisAofAtheA____________type
notAlessAthanA1A1/4Ain.AfromA-
AAnswerAWhereAcablesAorAnonmetallicAracewaysAareAinstalledAthroughAbored.holesAinA
joists,Arafters,AorAwoodAmembers;holesAshallAbeAboredAsoAthatAtheAedgeAofAtheAhole
AisAtheAnearestAedgeA-ofAtheAwoodAmember.
locatedAonAaAbalconyAaccessibleAonlyAtoAqualifiedApersons
locatedAinAaAroomAonlyAaccessibleAto
qualifiedApersons
elevatedA8AftAorAmoreAaboveAfloorAorAotherAworkingAsurfaceA-
AAnswerAToAguardAliveApartsAoverA50VAbutAlessAthanA600V,AequipmentAisApermittedA
toAbe
12FtA-
AAnswerAOverheadAfeederAconductorsAshallAhaveAaAminimumA__________AverticalAclear
anceAoverAresidentialApropertyAandAdriveways,AasAwellAasAthoseAcommercialAareasAno
tAsubjectAtoAtruckAtraffic,AwhereAtheAvoltageAisAlimitedAtoA300Avolts-to-ground.
36AinchesA-AAnswerAWhereArearAaccessAisArequiredAtoAworkAonAde-
energizedApartsAonAtheAbackAofAenclosedAequipment,AaAminimumAworkingAspaceAofAh
orizontallyAshallAbeAprovided.
50'A-
AAnswerAWhatAisAtheAmaximumArunAlengthAofAaA18AWGAfixtureAwireAthatAisAtappedA
onAtoAaA20AampAbranchAcircuit?
powerAsupplyAfailureA-AAnswerAWhenAtheAserviceAdisconnectingAmeansAisAaApower-
operatedAswitchAorAcircuitAbreaker,AitAshallAbeAableAtoAbeAopenedAbyAhandAinAtheAe
ventAofAa
2AinAofAconcreteA-
AAnswerAConductorsAareAconsideredAoutsideAaAbuildingsAwhenAtheyAareAburiedAunder
AnotAlessAthan
, 8A-
AAnswerAInAstraightApull,AtheAlengthAofAtheAboxAshallAnotAbeAlessAthan.A____timesAt
heAtradeAsizeAofAtheAlargestAraceway.
18"A-
AAnswerAAtAleastAoneAreceptacleAoutletAshallAbeAinstalledAwithinAofAtheAtopAofAaAsh
owAwindowAforAeachA12AlinearAfeetAmeasuredAhorizontallyAacrossAitsAlength
1000AA-AAnswerAGround-
faultAprotectionAofAequipmentAshallAbeAprovidedAfroAsolidlyAgroundedAwyeAelectricalAs
ervicesAofAmoreAthanA150Avolts-to-ground,AbutAnotAexceedingA600VAphase-
to..phaseAforAeachAserviceAdisconnectingAmeansArated
18"A-
AAnswerAReceptacleAoutletsAinAfloorsAshallAnotAbeAcountedAasApartAofAtheArequired
numberAofAreceptacleAoutletsAunlessAlocatedAwithinA______AofAtheAwall
50VA-
AAnswerAExposedAliveApartsAofAmotorsAandAcontrollersAoperatingAatAorAmoreAbetween
AterminalsAshallAbeAguardedAagainstAaccidentalAcontactAbyAenclosureAorAbyAlocation
5'A-
AAnswerALightingAtrackAshallAnotAbeAinstalledAlessAthan______AaboveAtheAfinishedAflo
orAexcept'AwhereAprotectedAfromAphysicalAdamageAorAwhereAtheAtrackAoperatesAatAle
ssAthanA30AVArms,Aopen-circuitAvoltage
4A-
AAnswerAEachAgeneralAcareAareaApatientAbedAlocationAshallAbeAprovidedAwithAaAmini
mumAof_______receptacles,AwhichAcanAbeAsingle,Aduplex,AorAaAcombinationAwithAeach
AduplexAcountingAasAtwoAreceptacles
CombinationARangeAhood/AMicrowave
ovenA-
AAnswerAInAaADwellingAUnitAwhichAapplianceAisAallowedAtoAhaveAaA24"AcordAwithAat
tachmentAgroundAplug?
1A-AAnswerAAtAleast_____A125AV,AsingleAphase,A15AAAorA20AA,AduplexAwithAground-
faultAcircuitAinterrupterAreceptacleAshallAbeAprovidedAinAeachAelevatorAmachineAroomA
andAelevatorAmachineryAspace.