Raceways Final Exam With Correct
Responces
Are fflexibility fand fexpansion fcapabilities frequirements fof fthe fNEC? fIf fyes, fwhich fNEC
fsection fapplies? f- fCORRECT✅✅No
List f4 ffactors ffor fdesigners fto fconsider fwhen fdesigning felectrical fsystems f-
fCORRECT✅✅Capacity fof fthe fsystem ffor fboth fexisting fand ffuture floads, fvoltage
fthat fis favailable fat fthe flocations faccessibility fof fthe felectrical fsource, fand fthe
fflexibility fof fthe fwiring fsystem.
Conductors finstalled fin fraceways fmay fbe fboth fsolid for fstranded fconfigurations. fWhat
fis fthe flargest fsolid fconductor fthat fmay fbe finstalled fin fa fraceway f- fCORRECT✅✅10
fAWG, fexcept fin fcertain fcases flike f8 fAWG ffor fnonmetallic fconduit.
Insulated fconductor ftypes fare fclearly fidentified fby fwhich fletter fwhen fthey fare
fdesigned fand fapproved ffor finstallation fin fwet flocations. f- fCORRECT✅✅W
When finstalling fsix f12 fAWG ftype fTHWN fcurrent-carrying fconductors fin fa ftrade fsize
f3/4(21) frigid fmetal fconduit, fwhat fis fthe fpercentage fof fampacity fadjustment frequired
fby fthe fNEC? f- fCORRECT✅✅20% fadjustment ffactor for fa fmultiplier fof f80%
(Nema fMotors) fwhen finstalling fthree f4 fAWG ftype fTHWN fcurrent-carrying fconductors,
fthree f10 fAWG ftype fTHWN fcurrent fcarrying fconductors, fand fthree f12 fAWG ftype
fcurrent-carrying fconductors, fwhat fampacity fadjustment fis frequired fand fwhat fis fthe
fallowable fampacity ffor fthese fthree fsizes fof fconductors? f- fCORRECT✅✅1. f30% f(a
f70% fmultiplier).
4 fAWG fTHWN: f35 famps f× f70% f= f24.5 famps
10 fAWG fTHWN: f30 famps f× f70% f= f21 famps
12 fAWG fTHWN: f25 famps f× f70% f= f17.5 famps
Where fcircuits fare frun fin fparallel, fwhat fis fthe fsmallest fsize fequipment fgrounding
fconductor fpermitted fto fbe finstalled fin feach fparallel fset fof frailways? f-
fCORRECT✅✅Full-sized fbased fon fthe fsize fof fthe fovercurrent fprotective fdeceive fin
ftable f250.122
Name f4 ftypes fof fcircuit fbreakers fon fthe fmarket ftoday f- fCORRECT✅✅Inverse ftime,
fthermal fmagnetic, finstantaneous ftrip, fand felectronic ftrip
A fset fof f2 fAWG fTHWN fconductors fis frouted fin fan funderground fduct ffor f200ft f(61m)
fto fa f75 fhorsepower fmotor. fThe fmotor fis fsupplied fby fa f480-volt, f3-phase fcircuit. fAre
Responces
Are fflexibility fand fexpansion fcapabilities frequirements fof fthe fNEC? fIf fyes, fwhich fNEC
fsection fapplies? f- fCORRECT✅✅No
List f4 ffactors ffor fdesigners fto fconsider fwhen fdesigning felectrical fsystems f-
fCORRECT✅✅Capacity fof fthe fsystem ffor fboth fexisting fand ffuture floads, fvoltage
fthat fis favailable fat fthe flocations faccessibility fof fthe felectrical fsource, fand fthe
fflexibility fof fthe fwiring fsystem.
Conductors finstalled fin fraceways fmay fbe fboth fsolid for fstranded fconfigurations. fWhat
fis fthe flargest fsolid fconductor fthat fmay fbe finstalled fin fa fraceway f- fCORRECT✅✅10
fAWG, fexcept fin fcertain fcases flike f8 fAWG ffor fnonmetallic fconduit.
Insulated fconductor ftypes fare fclearly fidentified fby fwhich fletter fwhen fthey fare
fdesigned fand fapproved ffor finstallation fin fwet flocations. f- fCORRECT✅✅W
When finstalling fsix f12 fAWG ftype fTHWN fcurrent-carrying fconductors fin fa ftrade fsize
f3/4(21) frigid fmetal fconduit, fwhat fis fthe fpercentage fof fampacity fadjustment frequired
fby fthe fNEC? f- fCORRECT✅✅20% fadjustment ffactor for fa fmultiplier fof f80%
(Nema fMotors) fwhen finstalling fthree f4 fAWG ftype fTHWN fcurrent-carrying fconductors,
fthree f10 fAWG ftype fTHWN fcurrent fcarrying fconductors, fand fthree f12 fAWG ftype
fcurrent-carrying fconductors, fwhat fampacity fadjustment fis frequired fand fwhat fis fthe
fallowable fampacity ffor fthese fthree fsizes fof fconductors? f- fCORRECT✅✅1. f30% f(a
f70% fmultiplier).
4 fAWG fTHWN: f35 famps f× f70% f= f24.5 famps
10 fAWG fTHWN: f30 famps f× f70% f= f21 famps
12 fAWG fTHWN: f25 famps f× f70% f= f17.5 famps
Where fcircuits fare frun fin fparallel, fwhat fis fthe fsmallest fsize fequipment fgrounding
fconductor fpermitted fto fbe finstalled fin feach fparallel fset fof frailways? f-
fCORRECT✅✅Full-sized fbased fon fthe fsize fof fthe fovercurrent fprotective fdeceive fin
ftable f250.122
Name f4 ftypes fof fcircuit fbreakers fon fthe fmarket ftoday f- fCORRECT✅✅Inverse ftime,
fthermal fmagnetic, finstantaneous ftrip, fand felectronic ftrip
A fset fof f2 fAWG fTHWN fconductors fis frouted fin fan funderground fduct ffor f200ft f(61m)
fto fa f75 fhorsepower fmotor. fThe fmotor fis fsupplied fby fa f480-volt, f3-phase fcircuit. fAre
