13
Power Supply and Wiring
Section 6 (continued)
Conduit, Wire and Fuse SizingTheuseofmetalconduitwithmetalconduitconnectorsisrecommendedforallelectricalconnections.Usethe
NECorCECtodeterminetherequiredconduitsizefortheapplication.
Refertothechartbelowfortheminimumallowablewiresizeforeachcontroller.Notethatthesewiresizes
arenotadjustedforvoltagedropduetolongcablelengths.Refertothewiresizingchartintheappendixto
determinethemaximumlengthfortheinputcable.Refertothemotormanualformaximumoutputcable
length.Themaximumrecommendedvoltagedroponbothinputandoutputcablecombinedis5%.Standard
wiresizingchartsgivemaximumcablelengthsforonlyinputoroutputcables.Becauseofthisthelengths
giveninthetablemustbeadjustedsothetotalvoltagedropdoesnotexceed5%.Forexample,iftheinput
wiresizingchartintheappendixgivesthemaximumlengthof400'andonly100'isusedthenonly25%ofthe
totalvoltagedrop(1.25%drop)isused.Themaximumoutputcablelengthreadfromthemotor‘swiresizing
chartmustthenbeadjustedto75%ofitsvaluesothatthemaximumvoltagedropof5%isnotexceeded.
UseonlyfastactingclassTfuses.ThewireusedfortheinputpowerconnectionsonmodelsSPD20300and
SPD20300Fmusthaveatemperatureratingof90ºCminimum.Allotherwiremustberated75���ºCminimum.
Thechartbelowshowstherecommendedsizesforwireandfusesforeachcontroller.Notethatthewiresizes
werenotadjustedforvoltagedropduetolongcablelengths.
Maximum Ambient Temperature ➞ 20ºC 30ºC 40ºC 50ºC
Generator Input Output Input Output Input Output Input Output
Voltage Frame Model Full Load Nominal Fuse Size Cable Cable Cable Cable Cable Cable Cable Cable
Size Number Output Current HP Size (VA) Min. AWG Min. AWG Min. AWG Min. AWG Min. AWG Min. AWG Min. AWG Min. AWG
1 SPD20050 17.8 5.0 30.0 7700 10 14 10 14 10 12 8 12
SPD20050F
SPD20075 26.4 7.5 40.0 11400 8 12 8 10 8 10 6 8
2 SPD20075F
SPD20100 37.0 10.0 50.0 16000 8 10 8 8 6 8 4 8
SPD20100F
SPD20150 47.4 15.0 70.0 20500 4 8 4 8 4 6 3 6
230 3 SPD20150F
SPD20200 60.6 20.0 80.0 26200 4 6 4 6 4 4 2 4
SPD20200F
SPD20250 76.0 25.0 110.0 32800 2 4 2 4 1 3 1/0 2
4 SPD20250F
SPD20300 94.0 30.0 135.0 40600 2* 3 1* 3 1* 2 1/0* 1
SPD20300F
SPD40050 8.9 5.0 15.0 7700 14 14 14 14 14 14 14 14
1 SPD40050F
SPD40075 13.2 7.5 20.0 11400 12 14 12 14 12 14 10 14
SPD40075F
SPD40100 18.5 10.0 30.0 16000 10 14 10 14 10 12 8 12
SPD40100F
460 2 SPD40150 23.7 15.0 40.0 20500 8 12 8 12 8 10 6 10
SPD40150F
SPD40200 30.3 20.0 50.0 26200 8 10 8 10 6 10 4 8
SPD40200F
SPD40250 37.5 25.0 60.0 32400 6 8 6 8 4 8 4 8
3 SPD40250F
SPD40300 47.0 30.0 70.0 40600 4 8 4 8 4 6 3 6
SPD40300F
*90ºCWireRequiredoninputtocontroller.