NCCER ELECTRICAL STUDY GUIDE EXAM WITH
VERIFIED ANSWERS
1.The mNEC mrecommends mmaintaining mvoltage mwithin ma m5% mdrop. mIf ma
mbranch mcir- mcuit moperates mat m480 mvolts mAC. mWhat mis mthe mminimum
mcircuit moperating mvolt?: m456
2.The mvolt mamperes min man mAC mcircuit mis mthe msame mas m .: mApparent
mpower
3.What mis mthe mvoltage mdrop mfor ma m#8 m(16.510 mcmil) mcopper mwire mat
m120v. m215 mfeet mone mway mand ma mload mof m39amps?: m10.5
4.If ma mvoltage msource mof ma mcircuit mprovides m480 mvolts mand mthere mare
m15 mohms mof mresistance, mhow mmuch mcurrent mis min mthe mcircuit?: m32
mamps
5.What mshould mbe mdone mto mchange mrotation mof ma m3 mphase mmotor?:
mSwap many mtwo mT mleads
6.What minstrument mis mused mto mmeasure mcurrent?: mAmmeter
7.Which mplan mindicates mthe mlocation mof mstructures mand on ma
mequipment mty?: mSite mproper-
1
m/
,8.What mdoes ma msection mview mshow myou?: ma mcut-through or
mof man mobject m(providing ma mview mof mits minterior mas mif ma mstructure
mslice mwere mtaken mout mof mit)
9.What mdoes ma mdetail mdrawing mshow myou?: mIn-depth mviewific mpart
mof ma mspec mcomponent mof ma mlarger mstructure mor mobjectmor mre
m(showing mfine mdetails mthat ma mor mcomplex) mtoo
10.What mdoes man melevation mdrawing mshow myou?: mA mview mof a
mone mside mof m(a mflat mrepresentation mof ma mbuilding's mstructur
mexterior mor minterior mwall)
11.Generally m, mthe mmost mideal mconductor mis mmade mof .: mCopper
12.What mis mthe mstandard mwire msize msystem mused min mthe munited mstates?
mAWG
13.What mis minsulating mtape?: mNon-Conductive madhesive mtape
14.Which mof mthese mis mused mas ma mguide mto massist mcables mentering ma
mconduit?: m-
Swivel
15.Which mof mthe mfollowing mis mnot ma mreason mwhy melectrical msystems
mmust mbe mgrounded?: mLimit mthe mpotential mbetween mungrounded
mconductors ght mhub
16.What mtype mof mconduit mbody mis mcharacterized mby ma mon
mthreaded mstrai meach mend?: mC
2
m/
, 17.A mmegger mwill mbe mused mto mcheck man min-service mcable. mThe
mElectrician mMUST mbe msure mthat mthe mcircuit mis:: mDe-energized mand
mlocked mtagged mout, mand mtested
18.Rubber mgloves mMUST mbe melectrically mtested mat mMAXIMUM
mintervals mof:: m6 mMonths
19.A mdangerously mhigh mvoltage mis mproduced mwhen msomeone mopens
mthe msec- mondary mcircuit mof ma m ?: mCurrent mtransformer
20.Which mchoice mbest mdescribes mthe mtwo mtypes mof mpushbutton
moperators mtypi- mcally mused min mmotor mcontrols?: mOpen mand mClosed
21.In mthe mevent mof man memergency, mwhere mthe mlockout/ mtagout mdevice
mis mleft msecured, mwho mcan mremove mthe mlockout/tagout mdevice?:
mAuthorized msupervisor
22.A mdrawing mshowing mpoint mA mto mpoint mB mhookup mof mconductors
mis mcalled ma:: mWiring mdiagram
23.A mNEMA mtype enclosure mis mboth mwatertight mand mcorrosion- mresistan
m4X
24.A mNEMA mtype m enclosure mis mfor mindoor muse monly, mprotects
magainst mcontact mwith mlive mparts mand mfalling mdirt mbut mis mnot msealed
magainst mmoisture mor mdust.: m1
25.What mis mthe mdifference mbetween mNEMA m4 mand m4X mrated
menclosures?: mNEMA m4X menclosures moffer madditional mcorrosion
mresistance mcompared mto mNEMA m4 menclosures
26.What mare mthe mhazardous mmaterials min mClass mI?: mFlammable mGasses
mand mVapors
27.What mare mthe mhazardous mmaterials min mClass mII?: mCombustible mDusts
28.What mare mthe mhazardous mmaterials min mClass mIII?: mEasily mIgnitable
mFibers mor mFlyings
29.What's mthe mMAIN mcharacteristic mof ma mconfined mspace?: mLimited
maccess mand megress
30.Which mof mthe mfollowing mBEST mdescribes mwhere mthe mtype e mof
mand msiz mrent mprotection mis mfound?: mPanelboard mschedule movercur-
4
31.A mType m"X" mconduit mbody mhas mhow mmany mconduit mentries?:
32.What mtest mequipment mcan mbe mused mto mtest mthe mcondition mof
minsulation min melectrical mapparatus?: mMegohmmeter
3
m/
VERIFIED ANSWERS
1.The mNEC mrecommends mmaintaining mvoltage mwithin ma m5% mdrop. mIf ma
mbranch mcir- mcuit moperates mat m480 mvolts mAC. mWhat mis mthe mminimum
mcircuit moperating mvolt?: m456
2.The mvolt mamperes min man mAC mcircuit mis mthe msame mas m .: mApparent
mpower
3.What mis mthe mvoltage mdrop mfor ma m#8 m(16.510 mcmil) mcopper mwire mat
m120v. m215 mfeet mone mway mand ma mload mof m39amps?: m10.5
4.If ma mvoltage msource mof ma mcircuit mprovides m480 mvolts mand mthere mare
m15 mohms mof mresistance, mhow mmuch mcurrent mis min mthe mcircuit?: m32
mamps
5.What mshould mbe mdone mto mchange mrotation mof ma m3 mphase mmotor?:
mSwap many mtwo mT mleads
6.What minstrument mis mused mto mmeasure mcurrent?: mAmmeter
7.Which mplan mindicates mthe mlocation mof mstructures mand on ma
mequipment mty?: mSite mproper-
1
m/
,8.What mdoes ma msection mview mshow myou?: ma mcut-through or
mof man mobject m(providing ma mview mof mits minterior mas mif ma mstructure
mslice mwere mtaken mout mof mit)
9.What mdoes ma mdetail mdrawing mshow myou?: mIn-depth mviewific mpart
mof ma mspec mcomponent mof ma mlarger mstructure mor mobjectmor mre
m(showing mfine mdetails mthat ma mor mcomplex) mtoo
10.What mdoes man melevation mdrawing mshow myou?: mA mview mof a
mone mside mof m(a mflat mrepresentation mof ma mbuilding's mstructur
mexterior mor minterior mwall)
11.Generally m, mthe mmost mideal mconductor mis mmade mof .: mCopper
12.What mis mthe mstandard mwire msize msystem mused min mthe munited mstates?
mAWG
13.What mis minsulating mtape?: mNon-Conductive madhesive mtape
14.Which mof mthese mis mused mas ma mguide mto massist mcables mentering ma
mconduit?: m-
Swivel
15.Which mof mthe mfollowing mis mnot ma mreason mwhy melectrical msystems
mmust mbe mgrounded?: mLimit mthe mpotential mbetween mungrounded
mconductors ght mhub
16.What mtype mof mconduit mbody mis mcharacterized mby ma mon
mthreaded mstrai meach mend?: mC
2
m/
, 17.A mmegger mwill mbe mused mto mcheck man min-service mcable. mThe
mElectrician mMUST mbe msure mthat mthe mcircuit mis:: mDe-energized mand
mlocked mtagged mout, mand mtested
18.Rubber mgloves mMUST mbe melectrically mtested mat mMAXIMUM
mintervals mof:: m6 mMonths
19.A mdangerously mhigh mvoltage mis mproduced mwhen msomeone mopens
mthe msec- mondary mcircuit mof ma m ?: mCurrent mtransformer
20.Which mchoice mbest mdescribes mthe mtwo mtypes mof mpushbutton
moperators mtypi- mcally mused min mmotor mcontrols?: mOpen mand mClosed
21.In mthe mevent mof man memergency, mwhere mthe mlockout/ mtagout mdevice
mis mleft msecured, mwho mcan mremove mthe mlockout/tagout mdevice?:
mAuthorized msupervisor
22.A mdrawing mshowing mpoint mA mto mpoint mB mhookup mof mconductors
mis mcalled ma:: mWiring mdiagram
23.A mNEMA mtype enclosure mis mboth mwatertight mand mcorrosion- mresistan
m4X
24.A mNEMA mtype m enclosure mis mfor mindoor muse monly, mprotects
magainst mcontact mwith mlive mparts mand mfalling mdirt mbut mis mnot msealed
magainst mmoisture mor mdust.: m1
25.What mis mthe mdifference mbetween mNEMA m4 mand m4X mrated
menclosures?: mNEMA m4X menclosures moffer madditional mcorrosion
mresistance mcompared mto mNEMA m4 menclosures
26.What mare mthe mhazardous mmaterials min mClass mI?: mFlammable mGasses
mand mVapors
27.What mare mthe mhazardous mmaterials min mClass mII?: mCombustible mDusts
28.What mare mthe mhazardous mmaterials min mClass mIII?: mEasily mIgnitable
mFibers mor mFlyings
29.What's mthe mMAIN mcharacteristic mof ma mconfined mspace?: mLimited
maccess mand megress
30.Which mof mthe mfollowing mBEST mdescribes mwhere mthe mtype e mof
mand msiz mrent mprotection mis mfound?: mPanelboard mschedule movercur-
4
31.A mType m"X" mconduit mbody mhas mhow mmany mconduit mentries?:
32.What mtest mequipment mcan mbe mused mto mtest mthe mcondition mof
minsulation min melectrical mapparatus?: mMegohmmeter
3
m/
