Specifications

RecommendedCurrentRatingofFeederCircuitBreakers
Caution:Toreducetheriskoffire,connectonlytoacircuitprovidedwith(seebelow)
amperesmaximumbranchcircuitovercurrentprotectioninaccordancewiththeNational
ElectricCode,NSI/NFPA70.
208VUPSonly
Standardrated(80%)100%rated
Mainsinput(A)450400
Bypassinput(A)450400
Battery(A)300300
Output(A)350300
RecommendedConductorSizesperPhase/Neutral
Caution:Allwiringmustcomplywithallapplicablenationaland/orlocalelectricalcodes.
ConductorsizinginthismanualisbasedonTable310-16oftheNationalElectricalCode(NEC)with
thefollowingassertions.
•90
◦
Cconductors(THHN)for75
◦
Ctermination
•3currentcarryingcable
•Anambienttemperatureof30
◦
C
•Useonlycopperconductors
Iftheambientroomtemperatureisgreaterthan30
◦
C,largerconductorsaretobeselectedinaccordance
withthecorrectionfactorsoftheNEC.
EquipmentGroundingConductors(EGC)aresizedinaccordancewithNECArticle250-122andTable
250-122.
GroundingElectrodeConductors(GEC)aresizedinaccordancewithNECArticle250-66andTable
250-66.
Theconductorsizesarerecommendationsformaximumconfigurations.Eveniftheloadislessthanthe
maximumrating,itiswisetoplanforfutureloadincreases.Ifthesystemisoperatedatalowerload
thanitsratinganditisdesiredtosupplythesystemwithalowerratedbreakerandsmallerconductors,
conductorampacitiesaretobeselectedinaccordancewiththeNEC.
208VUPSonly
Standardrated(80%)100%rated
Mainsinput2x4/0AWG500kcmil
Bypassinput2x4/0AWG500kcmil
Battery
300kcmil300kcmil
Output500kcmil300kcmil
EquipmentGroundingConductor3AWG3AWG
990–3659C-001
SymmetraPX100kW208V
3