SACA C-202 EXAM WITH FULL PACK
SOLUTIONS
Do iyou iknow ithe iprimary ireason ifor igrounding? i- icorrect ianswers i-Equipment
igrounding ilimits ithe ivoltage ibetween iall imetal iparts iof ithe isystem iand iearth iground
ito ia isafe ilevel, ithereby ireducing ithe irisk iof ishock.
Can iyou iname ithe icommon istandards iassociated iwith ielectrical icontrol? i- icorrect
ianswers i-National iElectrical iCode i(NEC)
National iElectrical iManufacturer's iAssociation i(NEMA)
International iElectrotechnical iCommission i(IEC)
Underwriter's iLaboratories i(UL)
Occupational iSafety iand iHealth iAdministration i(OSHA)
Can iyou istate ithe iten ibasic irules iof ielectrical isafety? i- icorrect ianswers i--Remove iall
imetal ijewelry
-Be iaware iof iconditions ibefore iworking ion ia ipiece iof iequipment
, -Do inot irely ion isafety idevices ito iprotect iyou
-Never iremove ithe igrounding iprong ion ian iAC iplug
-Always ikeep iyour itools iand itest iequipment iorganized
-Do inot iwork ion iwet ifloors
-Work iwith ione ihand
-Always imove islowly iand ideliberately
-Do inot iwork ialone
-Avoid idistractions
Can iyou iexplain ithe ioperation iof ithree-phase ipower? i- icorrect ianswers i-Three-phase
ipower iis ielectrical itransmitted iin ithree iseparate iphases. iAn ialternator ithat ihas ithree
imain iwindings ioperating i120 idegrees iapart icreates ithe ithree iphases.
Do iyou iknow ithe ifunction iof ineutral iin ielectrical ipower? i- icorrect ianswers i-A ineutral
iis ia iconductor ithat iprovides ia icommon ireturn ipath ito ithe isource ifor ithe iconductors
iin ia isystem.
Can iyou iexplain ithe ioperation iof igrounded iand iungrounded isystems? i- icorrect
ianswers i-The idifference ibetween ithe ioperation iof ia igrounded isystem iand ian
iungrounded isystem iis iseen iin itheir ireactions ito ia iground ifault. iA iground ifault ioccurs
iwhen ione iof ithe iphases ibecomes igrounded.
If ithe iground ifault ioccurs ion ione iof ithe iphases ipf ia igrounded isystem, ithe icircuit
iprotection idevices iwill iopen ithe icircuit ibecause iof ithe icircuit ibecause iof ithe
iincreased icurrent idraw. iThis iwill icause ithe ipower ito ishut idown.
If ia iground ifault ioccurs iin ione iof ithe iphases iof ian iungrounded isystem, ithe ioperation
iof ithe icircuit iwill inot ibe iinterrupted.
Do iyou iknow ihow idifferent itypes iof iovercurrent iprotection iwork? i- icorrect ianswers i-
A ifusible idisconnect ihas ia ifuse ifor ieach iphase iand ia imanually ioperated iswitch ithat
iwill idisconnect iall iphases iat ionce.
A icircuit ibreaker imust ibe iable ito iopen iall iphases iwhen iit itrips. iIt imust ialso ihave ia
imeans iof imanually idisconnecting ithe imotor iand ithe icontroller ifrom ithe iline.
Do iyou iknow ihow ia ithree iphase imotor iworks? i- icorrect ianswers i-The istator iof ia
ithree-phase imotor iis imade iup iof ithree iseparate isets iof iwindings, ione iset ifor ieach
iphase iof ipower ifed ito ithe imotor.
Since ithe iwindings iare iidentical, ithe ithree-phase imotor idoes ino idepend ion ithe
iwindings ithemselves ito iproduce ithe irotating imagnetic ifield, ilike ithe isingle-phase
imotors.
A ithree iphase imotor iinstead itakes iadvantage iof ipolarities iwith ia i6 ipoint isystem.
iWithin ithe i6 ipoint isystem ithe i3 iphases ialternate ibetween ipositive iand inegative
icurrent iflow icausing ithe imagnetic ifields.
Can iyou iinterpret ithe idata ion ia imotor's idataplate? i- icorrect ianswers i-The itypical
iitems ifound ion ia imotor's inameplate iare:
Manufacturer
SOLUTIONS
Do iyou iknow ithe iprimary ireason ifor igrounding? i- icorrect ianswers i-Equipment
igrounding ilimits ithe ivoltage ibetween iall imetal iparts iof ithe isystem iand iearth iground
ito ia isafe ilevel, ithereby ireducing ithe irisk iof ishock.
Can iyou iname ithe icommon istandards iassociated iwith ielectrical icontrol? i- icorrect
ianswers i-National iElectrical iCode i(NEC)
National iElectrical iManufacturer's iAssociation i(NEMA)
International iElectrotechnical iCommission i(IEC)
Underwriter's iLaboratories i(UL)
Occupational iSafety iand iHealth iAdministration i(OSHA)
Can iyou istate ithe iten ibasic irules iof ielectrical isafety? i- icorrect ianswers i--Remove iall
imetal ijewelry
-Be iaware iof iconditions ibefore iworking ion ia ipiece iof iequipment
, -Do inot irely ion isafety idevices ito iprotect iyou
-Never iremove ithe igrounding iprong ion ian iAC iplug
-Always ikeep iyour itools iand itest iequipment iorganized
-Do inot iwork ion iwet ifloors
-Work iwith ione ihand
-Always imove islowly iand ideliberately
-Do inot iwork ialone
-Avoid idistractions
Can iyou iexplain ithe ioperation iof ithree-phase ipower? i- icorrect ianswers i-Three-phase
ipower iis ielectrical itransmitted iin ithree iseparate iphases. iAn ialternator ithat ihas ithree
imain iwindings ioperating i120 idegrees iapart icreates ithe ithree iphases.
Do iyou iknow ithe ifunction iof ineutral iin ielectrical ipower? i- icorrect ianswers i-A ineutral
iis ia iconductor ithat iprovides ia icommon ireturn ipath ito ithe isource ifor ithe iconductors
iin ia isystem.
Can iyou iexplain ithe ioperation iof igrounded iand iungrounded isystems? i- icorrect
ianswers i-The idifference ibetween ithe ioperation iof ia igrounded isystem iand ian
iungrounded isystem iis iseen iin itheir ireactions ito ia iground ifault. iA iground ifault ioccurs
iwhen ione iof ithe iphases ibecomes igrounded.
If ithe iground ifault ioccurs ion ione iof ithe iphases ipf ia igrounded isystem, ithe icircuit
iprotection idevices iwill iopen ithe icircuit ibecause iof ithe icircuit ibecause iof ithe
iincreased icurrent idraw. iThis iwill icause ithe ipower ito ishut idown.
If ia iground ifault ioccurs iin ione iof ithe iphases iof ian iungrounded isystem, ithe ioperation
iof ithe icircuit iwill inot ibe iinterrupted.
Do iyou iknow ihow idifferent itypes iof iovercurrent iprotection iwork? i- icorrect ianswers i-
A ifusible idisconnect ihas ia ifuse ifor ieach iphase iand ia imanually ioperated iswitch ithat
iwill idisconnect iall iphases iat ionce.
A icircuit ibreaker imust ibe iable ito iopen iall iphases iwhen iit itrips. iIt imust ialso ihave ia
imeans iof imanually idisconnecting ithe imotor iand ithe icontroller ifrom ithe iline.
Do iyou iknow ihow ia ithree iphase imotor iworks? i- icorrect ianswers i-The istator iof ia
ithree-phase imotor iis imade iup iof ithree iseparate isets iof iwindings, ione iset ifor ieach
iphase iof ipower ifed ito ithe imotor.
Since ithe iwindings iare iidentical, ithe ithree-phase imotor idoes ino idepend ion ithe
iwindings ithemselves ito iproduce ithe irotating imagnetic ifield, ilike ithe isingle-phase
imotors.
A ithree iphase imotor iinstead itakes iadvantage iof ipolarities iwith ia i6 ipoint isystem.
iWithin ithe i6 ipoint isystem ithe i3 iphases ialternate ibetween ipositive iand inegative
icurrent iflow icausing ithe imagnetic ifields.
Can iyou iinterpret ithe idata ion ia imotor's idataplate? i- icorrect ianswers i-The itypical
iitems ifound ion ia imotor's inameplate iare:
Manufacturer
