NHIE Electrical System Exam Questions.pdf

NHIE: Electrical System —
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Exam Questions/exam questions and an
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swers/review study guide/correct/verifie
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Serviceysentranceysconductorsysrunysfromystheysserviceysdropystoystheysserviceysboxysorysservicey
spanel.ysTrueysofysfalse?ys-yscorrectysanswers--ysTrue



Theysserviceyssizeysisysdeterminedysbyystheysamperageysandystheysvoltageysratingsysofystheysservi
ce.ys-yscorrectysanswers--ysTrue
Isystheysserviceysdropysoverheadysorysunderground?ys-yscorrectysanswers--ysOverhead
Areysserviceyslateralsysoverheadysorysunderground?ys-yscorrectysanswers--ysUnderground
Theysdripysloopysisystypicallyyspartysofystheysserviceysdrop.ysTrueysorysFalse?ys-yscorrectysanswers--
ysFalse



Theyswireyssizeysforystheysserviceysdropysmustysbeystheyssameysasystheyswireyssizeysforystheysservic
eysentranceysconductors.ysTrueysorysFalse?ys-yscorrectysanswers--ysFalse
Howysmanyyswiresyswouldysyouystypicallyysfindysinysays240-voltysserviceysdrop?ys-
yscorrectysanswers--ys3



Whatyswouldys4yswiresysmean?ys-yscorrectysanswers--ys3-phaseyselectricity
Whatyswouldys2yswiresysusuallyysmean?ys-yscorrectysanswers--ys120ysvoltysservice
Listys7yscommonysproblemsyswithysserviceysdrops.ys-yscorrectysanswers-
1.ysOverheadyswiresystooyslow.
2.ysDamagedysorysfrayedyswires.
3.ysTreesysorysvinesysinterferingyswithyswires.
4.ysWiresystooyscloseystoysdoorsysoryswindows.
5.ysWiresysnotyswell-securedystoystheyshouse.
6.ysPoorysconnectionysbetweenysserviceysdropysandysserviceysentrance.
7.ysInadequateysclearanceysfromysroofs.
Listysclearancesysaboveysground,ysswimmingyspools,ysandysroofs.ys-yscorrectysanswers-
Clearancesysabove:

, -ysRoadwayys18ysft
-ysDrivewayys12ysft.
-ysWalkwayys10ysft.
-ysFlatysroofys10ysft.
-ysSlopedysroofys(e.g.,ys>ys4:12)ys18ysin.
-ysLowysslopeysroofys(e.g.,ys<ys4:12)ys3ysft.
-ysSwimmingyspoolys22.5ysft
Theysserviceysentranceysconductorsysrunysfromystheys_________ystoystheys___________.ys-
yscorrectysanswers--ysServiceysdropystoysserviceysbox



Allysserviceysentranceysconductorsysmustysbeysinysconduit.ysTrueysorysFalse?ys-
yscorrectysanswers--ysFalse



Allysserviceysentranceysconductorsysmustysbeysattachedysaboveysroofyslevel.ysTrueysorysFalse?ys-
yscorrectysanswers--ysFalse



Theysdripysloopysshouldysbeysasyscloseystoystheysroofysasyspossible.ysTrueysorysFalse?ys-
yscorrectysanswers--ysFalse



Listys10yscommonysproblemsyswithysserviceysentranceysconductors.ys-yscorrectysanswers-
1.ysNoysdripysloop
2.ysNoysmastyshead
3.ysMastysheadysnotysweatherystight.
4.ysMastysorysconduitysbent.
5.ysMastysorysconduitysrusted.
6.ysMastysrottedys(ifyswood).
7.ysMastysconduitysoryscableysnotyswellyssecured.
8.ysMastysconduitysoryscableysnotysweatherystight.
9.ysConduitysoryscableysnotyswellyssealedysatyshouse/wallyspenetration.
10.ysCableysfrayed,ysdamaged,ysoryscoveredysbyyssiding.
Listys4yscommonysareasysofyswateryspenetrationysintoysserviceysentrances.ys-yscorrectysanswers-
1.ysconduitysjoints
2.ysmastyshead
3.ysroofysflashing