APC Symmetra PX Specifications download pdf (Page 12)

RecommendedConductorSizes

Caution:Allwiringmustcomplywithallapplicablenationaland/orlocalelectricalcodes.

ConductorsizinginthismanualisbasedonTable310-16ofthe2008NationalElectricalCode(NEC)

withthefollowingassertions:

•90

◦

Cconductors(THHN)for75

◦

Ctermination

•3CurrentCarryingConductors

•Anambienttemperatureof30

◦

Iftheambientroomtemperatureisgreaterthan30

◦

C,largerconductorsaretobeselectedinaccordance

withthecorrectionfactorsoftheNEC.

EquipmentGroundingConductors(EGC)aresizedinaccordancewithNECArticle250-122andTable

250-122.

GroundingElectrodeConductors(GEC)aresizedinaccordancewithNECArticle250-66andTable

250-66.

Theconductorsizesarerecommendationsformaximumconﬁgurations.Eveniftheloadislessthanthe

maximumrating,itiswisetoplanforfutureloadincreases.Ifthesystemisoperatedatalowerload

thanitsratinganditisdesiredtosupplythesystemwithalowerratedbreakerandsmallerconductors,

conductorampacitiesaretobeselectedinaccordancewiththeNEC.Thetransformerinrushmustbetaken

intoaccountwhensizingconductors.

208V:208V480V:208V600V:208VNotransformer

Cu(2)4/04/02/0(2)4/0

MainsinputØ

andN

Al(2)300kcmil300kcmil4/0(2)300kcmil

Cu2AWG Grounding

Electrode

Conductor

(GEC)

Al1/0

Cu2AWG4AWG6AWG2AWG Equipment

Grounding

Conductor

(EGC)

Al1/02AWG4AWG1/0

OutputSuppliedwithPowerDistributionModules

(2)2/0ØandN,4AWGEGC,GECnotrequired

Subfeedoutput

(2)4/0ØandN,2AWGEGC,GECnotrequired

Ø=phase

N=neutral

(2)=twoconductorsperphaseandneutral(whenneutralisrequired)

Subfeedisrequiredtohavetwoconductorsperphase&Nforfulloutputduetolimitedwirebendspace.

TheNotransformerPDUrequiresaNeutral&doesnotrequireGEC.

Cu=Copperconductors,Al=Aluminumconductors

SymmetraPX100kW208V

990–3659C-001

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 59 60

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APC Symmetra PX Specifications Page 12

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