longwood wiring standards

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WiringStandardsandGuidelinesLongwoodUniversity

Thisdocumentanditsreferencesareintendedtoassistthearchitect/designerand

theinstallerinthebaseguidelinesandstandardsutilizedatLongwoodUniversity

tocompleteaneffectiveandefficientwiringinfrastructure.

2009

MarkKendrick,DirectorCTS

LongwoodUniversity

1/12/2009


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CHARGE

TheDivisionofCommunicationsandTechnologyServiceshastheresponsibilityforplanning,developing,managingandmaintainingthemost

effective,efficientandeconomicalcommunicationsnetworksystem.Initsroleasasystemintegratorofnetworks,theDivisionsupportsallUniversityneedsbyapprovingandcoordinatingallvoice,dataandvideocommunicationssystemspolicies.Withtheconvergenceofvoice,data

andvideotechnologies,theDivisioniscommittedtoaseamlesscommunicationsservicesnetwork.

Inrecentyears,thefocusoncommunicationssystemplanning,operationsandprocurementforvoice,dataandvideocommunicationshave

movedincreasinglyintotheforefrontoftheattentionofUniversityadministratorsanddepartmentdirectors.Communicationssystemsarenow

seenasatoolforimprovingemployeeproductivity,facilitatingtheeducationprocessandreducingoperatingcosts.Byproviding

communicationsandapplicationscompatibilitybetweenacquiredcommunicationssystemsandrelatedservices,theUniversitywillmeetits

goalofachievingatotallyintegratedinformationsystemsenvironment.

CommunicationsandTechnologyServiceswillcontinuetomaintainasophisticatedandcomprehensivecommunicationsinfrastructurethrough

whichtheUniversitycommunitycanshareaccesstocostlytechnologyresources,andthereforeminimizeexpensiveandunnecessary

duplication.TheDivisionwilldevelopandexpandnetworksystemstoenhanceandfacilitatethegrowthoftheinfrastructurebyproviding

leadershipandcoordinationfortheplanning,development,acquisitionandutilizationofnewtechnologies.

Thereare13numberedsectionstothisdocument:

2SERVICEENTRANCEANDTERMINATIONOUTSIDEPLANT

3TELECOMMUNICATIONSROOMSANDCABLETERMINATION

4VOICEANDDATAOUTLETSINSIDEPLANTWIRINGANDRACEWAYS

5TELEVISIONCABLEANDOUTLETS

6PROTECTION,GROUNDINGANDBONDING

7INSPECTIONANDTESTING

8FIRESTOPPING

9LOCALAREANETWORKS

10FIBEROPTICTECHNOLOGY

11MISCELLANEOUSANDSPECIALSITUATIONS

12CODES,STANDARDSANDREGULATIONS

13GLOSSARYANDACRONYMS

Thisdocumentisintendedtobeaguidelineforthedesignerandtheinstaller.Therearemanyvariablesthataffectthedesignandconstruction

ofabuilding,butwiththecoordinationofthedesignerandtheITdepartmentatLongwoodUniversityeachbuildingwillbeasuccess.


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GENERAL............................................................................................................................3

INTRODUCTION.................................................................................................................3

CABLE.................................................................................................................................3

GENERAL............................................................................................................................3

LABELING............................................................................................................................4

AERIAL.................................................................................................................................4

CONDUIT.............................................................................................................................4

GENERAL.............................................................................................................................4

REQUIREMENTS..................................................................................................................4

UNDERGROUND..................................................................................................................4

TUNNELS.............................................................................................................................4

CONDENSATIONTRAPS.....................................................................................................5

TYPES.................................................................................................................................5

MANHOLES.........................................................................................................................6


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GENERAL

INTRODUCTIONThissectionprovidesthenecessaryguidelinestoinstallserviceentrancestobuildingsandinformationfortheterminationof

cablesenteringbuildings.Topicsaddressedvoice,dataandvideoandcurrentCATV.

Alloutsideplantvoice,data,andvideocabling,conduitandmanholesshallbedesignedand/orapprovedbytheUniversitysDivisionof

CommunicationsandTechnologyServices.

LongwoodUniversityFacilitiesManagementisresponsiblefortheEnergyManagementSystemandcampusFireAlarmSystem.

CABLE

GENERAL

PriorapprovalandcoordinationwithCommunicationsSystems,Facilities,andotherconcernedpartiesisnecessarywhenthesituationrequires

pullingcablethroughaconduitoccupiedbyanothercable.

Allcablesassociatedwiththecampustelecommunicationsnetwork(telephone,data,LAN,WAN,campusTV,CATVandfiberoptics)shallbe

connectedanddisconnectedbyCommunicationsSystems.

Onlythosecablesspecified,willbeinstalledinanyfacility.

Thereshallbenocablewithvoltageshigherthan48voltsincommunicationsductbanks.Electricalfeedersforsumppumps,lightsandoutlets

mustbeinstalledaccordingtotheNationalElectricalCoderequirementsforwetlocations.Allconduitsmustbeextendedinthemanhole.

Theseconduitsmustbeclearlytagged.

Allcablesenteringabuildingshallbeterminatedonprotectionblocks.Onlygasandsolidstateprotectorsshallbeused.

Damagesincurredtoanycablearetheresponsibilityofthepartyinvolved.AlldamagesshallbereportedimmediatelytoCommunications

SystemsandFacilitiesManagers.

LABELING

Allcablesineachmanholeshallbeidentifiedbytheownerofthecable,cablenumber,cabletype,numberofpairsandtheterminationpoint.

Labelsshallinclude,forexample:CommunicationsSystems,Cable05,SS100,101200,B58.Thetagshallbemadeofaluminumorstainless

steel.

Wheneverpossible,allabandonedcableshallberemovedfromtunnels,manholesandconduit.Ifitisnotfeasibletoremoveabandonedcable,

itshallbeclearlytaggedasabandoned,withappropriatelabelingasabove,andshallbereportedtoCommunicationsSystemsandFacilities

Managers.

AERIAL

Mostuniversitylowvoltagecablingisunderground.NoaerialwiringshallbedoneoncampusunlessapprovedbyCommunicationsSystems,

FacilitiesManager,andCapitalPlanning.


CONDUIT


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GENERAL

ConduitsizingandquantitiesbetweenbuildingsshallbedeterminedbytheDivisionofCommunicationsSystemsandwillbecommunicatedto

CapitalPlanningforinclusionintheproject.Minimumrequirementsareoutlinedinthefollowingstatements:

Allcampusbuildingsshallbeconnectedtothenearestmanholeornewmanholeifoneistobeinstalled.

Damagesincurredtoanyconduitaretheresponsibilityofthepartyinvolved.AlldamagesshallbereportedtoCommunicationsSystemsand

FacilitiesManagersimmediately.

REQUIREMENTS

Allnewfacilitiesorrenovationswillberequiredtomeetminimumrequirements.Minimumvoice,data,andvideoconduitrequiredforeach

buildingshallbe4conduits.

Two(2)ofwhichshallbe2Schedule40,PVC.

Two(2),fourinch,Schedule40,PVC.

Nomorethantheequivalentoftwo90degreelongsweepsallowedinarun,includingoffsets.

Apullwireshallbeinstalledandtiedoffineachconduit.Pullwiresusedinoutsidefacilitiesshallbenylonandusedtopullheavierropeas

neededtoinstallcable.Pullwireshallbeinstalledwithnewcabletoallowfutureinstalls.Pullwiresusedinsidefacilitiesshallbenylon.

UNDERGROUND

Allundergroundconduitsandducts,rigidorPVC,addedtoaprojectshallbeaddedingroupsof2,4,6,8,10,12ormore.Communicationsduct

shallbe66.6percentfour(4)inchSchedule40.Undernocircumstancesaresingleundergroundconduitrunsacceptable.

Allundergroundconduit,ductbankandracewaysshallbesteelreinforced,concrete(3500psiminimum)encasedPVCordirectburiedthreaded

rigidsteel.Additionalreinforcementistobeusedwhencrossingroadways.

Allcommunicationsductsshallbeaminimumof12inchesfrompowerductbanksorcables.Allcommunicationsductsshallalsobeaminimum

of24inchesfromsteampipesandcondensationlinesifcrossingperpendicular.

Whencommunicationductsrunparalleltosteamlinesaminimumofasix(6)footseparationisrequiredtoavoidconductionofheat.Allother

ductseparationsmustcomplywiththeNationalElectricCode.

UNDERGROUNDRigidsteelconduit,encasedinreinforcedconcrete,shallbeusedinanylocationsubjecttoabuse,suchasunderslabsor

foundations.

Allnecessaryprecautionsshallbetakenduringconstructiontopreventthelodgingofdirt,plasterortrashinallconduit,tubing,fittingsand

boxes.Allconduitinfloors,concreteorbelowgrade,shallbeswabbedfreeofdebrisandmoisturebeforewiresarepulled.

AlldiggingsandexcavationonLongwoodPropertyshallbeapprovedbyFacilitiesManagerandCommunicationsSystems.

TUNNELS

Whereconduitorductsareintunnels,theyshallbekeptatleast24inchesfromparallelrunsofflues,steampipes,hotgaspipes,hotwater

pipesoranyotherutilitylinewhichishotduringnormaloperationofthefacilityitserves.Unlesswrittenexceptionisprovidedbythe

University,allconduitsectionscrossingsteamlinesshallberigidandshallbeprovidedwithameansofinsulationfromthesteamlines.

CONDENSATION


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Ductbanksshallbepitchedtodraintomanholes.

TRAPS

Allconduit,tubing,raceways,ductsandductbanksshallbeinstalledinsuchmannertoinsureagainstcollectionoftrappedcondensation.

Racewayrunsshallbearrangedtobevoidoftraps.

Whenconduitpassesthroughexteriorconcretewallsofanyfacility,theentranceshallbewatertight.Providepipesleevesintheconcretewith

1/2inchminimumentranceseal.

Allconduitshallhavewatertightconnectionsandbeslopedproperlysotheywilldrainintothemanholeandawayfromthebuildingentrance.

TYPES

Gaspipeandwaterpipesshallnotbeusedforconduitunderanycircumstances.

Twotypesofconduitareacceptedforundergroundconduitsystems.

RigidgalvanizedsteelconduitwiththreadedfittingsThisconduitshallbeinstalledwithreinforcedconcretecasing.Ifnotconcreteencased,

thisconduitshallbepaintedwithtwocoatsofcoaltarbasepaintorhaveepoxycoatingappliedbymanufacturer.

Schedule40PVCconduitThisconduitshallbeinstalledwithreinforcedconcretecasing.NoPVCconduitisacceptablewithoutreinforced

concrete.

Rigidsteelconduitsinstalledundergroundshallbefieldwrappedwith0.01inchthickpipewrappingplastictapeappliedwitha50percent

overlap,orshallhaveafactoryappliedplasticresin,epoxyortwocoatsofafieldappliedasphalttarspecificallymadeforthispurpose.Where

theasphalttarcoatingmethodisused,thecontractorshallnotifytheUniversityCapitalPlanningManagerpriortobackfillingsothatthe

Universitymayinspectthecoatingandapprovebeforetheconduitiscovered.

Paintingshallextendtosix(6)inchesabovegroundlevelwhereconduitisinstalledbyapoleorsidestructureorinsidepedestal.

Theductenvelopeshallberectangularinthecrosssectionandbeaminimumconcretethicknessofthree(3)inchesaroundanyconduit.The

ductenvelopeshallbesizedandplacedasshownonconstructiondocuments.

Aminimumoffour(4),#4,steelreinforcingrodsshallbeinstalledinallductbankenvelopes.Whereconduitentersabuildingoramanholethe

rebarsmustbedoweledintotheexistingstructuretopreventshearingoftheconduitsincaseofsettlement.

Whereaconnectionismadetoanexistingmanholeorbuildingtheenvelopeshallbedoweledintotheexistingencasementstoprevent

shearingduetosettling.

Allconduitandductsmustbeterminatedwithbellendsatthemanhole,facilityorotherterminationpoint.Wheretrenchwallsareunstableor

thetrenchwidthiswiderthantheenvelope,theenvelopeshallbeformedasrequired.

Ductspacersshallbeprovidedatamaximumofsevenfeetintervals.Conduitshallbeanchoredatthree(3)footsix(6)inchintervalsandat

eachspacertopreventductfloatingduringconcreteinstallation.

Eachductrunshallbedonewithacontinuousconcretepour.BrokenpoursarenotallowedwithoutwrittenexceptionfromtheUniversity,and

provided#4rebarorlargerisextendedtwelve(12)inchesbeyondtheendoftheenvelopeattheendofeachday'spourandatallstubouts.

MANHOLES

GENERAL


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TheUniversityusesQuazitboxesinvarioussizestoaccommodatetheconduitseitherassplicepointsorpassthrough.Currentpartnumbers

are:TopPG3060HH00,BoxPG3060BA36.

Standards.

Boxesshallbeinstalledtoallowthetopoftheboxtobeatgradelevelwiththesurroundinglandscape.

TheBoxesshallnotbestackedmorethantwodeep.Thebottomsixinchesshallbefilledwithgravel,#56insize,andnotexceedpastthetopsixinchesoftheconduit.

Boxesshallnotbeinstalledinlocationswhereheavytrafficcoulddamagethetop.

Themaximumdepthofallmanholesshallbeten(10)feetfromthebottomunlessotherwise

approvedbyCommunicationsSystems.


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OVERVIEW..........................................................................................................................8

DEFINITION........................................................................................................................8

SPACE.................................................................................................................................8

GENERAL............................................................................................................................8

REQUIREMENTS.................................................................................................................8

GENERAL............................................................................................................................8

ENVIRONMENT..................................................................................................................8

ELECTRICAL........................................................................................................................8

GROUNDING.....................................................................................................................9

LABELING..........................................................................................................................9

CABLE...............................................................................................................................9

GENERAL...........................................................................................................................9

RACKSANDPANELS..........................................................................................................10

GENERAL...........................................................................................................................10

WIREDRESS.......................................................................................................................10

RACKANDPATCHPANEL...................................................................................................10

PUNCHDOWN....................................................................................................................11


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OVERVIEW

DEFINITION

Telecommunicationroomsarespecialpurposeroomsthathousetelecommunicationsequipment.

Theseequipmentroomshavestringentrequirementsduetothenature,sizeandcomplexityoftheequipmenthousedintheroom.

SPACE

Theminimumdimensionforacommunicationswalkinroomis100squarefeetor150squarefeetwhentheroomistobesharedwith

computers,telephoneswitches,andequipmentracks,suchasaPBXorlargekeysystem.Otherexceptionsmayapply;Communications

Systemsshallbecontactedforfinalfootageapproval.

GENERAL

Anapprovedfireextinguishermustbeprovidedjustoutsidethedoorofeachcloset.AllworkshallcomplywiththeNationalElectricalCode,

CommonwealthofVaBuildingCodesandLongwoodUniversityCommunicationsSystemsGuidelinesandCapitalPlanningDesignand

ConstructionStandards.

Telecommunicationsroomsvaryaccordingtothesizeofthebuilding,numberoffloors,tenancycharacteristicsandtelecommunications

servicesrequired.Considerationtothefutureneedsofthefacilityandtheendusersisanecessity.

Electricalpanelsarestrictlyprohibitedincommunicationsrooms.

A50percentgrowthfactorshallbebuiltinandprovidedineachriserunlessotherwisespecified,consequentlyanycableorconduitworkthat

pertainstotelecommunicationsmustbedesignedand/orapprovedbyCommunicationsSystems.

Tofacilitatetheproperinstallation,routingandplacementofcables,wires,premiseequipmentandterminalfields,communicationroomsshall

belocatedoneachfloor,inthemiddleofthebuildinginsteadofeitherendandstackedoneabovetheother,unlessotherwiseinstructedby

CommunicationsSystems.Architectsmustpayextraattentiontoroomlocationstoovercomedistancelimitations.Thetotaldistanceofthe

conduitpath,fromoutlettothecommunicationsroomshallnotexceed275feetincludingterminationloss.

An"AsBuilt"drawingshallbesubmittedwitheachjobuponacceptance.

Allcommunicationsroomdoorsaretobekeyedalike.Locksshallbespringlock(selflocking).Allcommunicationsroomswillutilizeaccess

controlkeycards.

Doorwaysshallbedesignedwithminimummeasurementsof3feetby6feet8inchesandshallopenoutwardintothecorridor.

Floorsshallbesealedconcreteortile,carpetisprohibited.

Telecommunicationroomsshallbelocatedaboveanythreatofflooding.Roomslocatedinbasementsshallhavefloordrainswithpositive

drainageotherwisesumppumpsmustbeprovided.

Firetreatedplywood,3/4inchthick,mustbemechanicallyfastenedtoaminimumofonewallandpaintedwithtwo(2)coatsoffireresistant

paintofaneutralcolor.Thefiretreatedplywoodistobeginatfour(4)inchesAFFandendat8feet,4inchesAFF.

Therecommendedceilingheightis8feet,6inches.Avoidfalseceilings,ifpossible.

Installsleevesbetweenstackedcommunicationsrooms,withsleevesextended4(four)inchesAFFand4(four)inchesbelowtheceilingofthe

room.


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ENVIRONMENTAllcommunicationsroomsshallbeenvironmentallycontrolledtomaintaintheroomenvironmentatatemperaturerangeof65

to75degreesFahrenheit,withamaximumrelativehumiditylevelof50percent,24hoursaday,7daysaweek.Communicationsroomsshallbe

conditionedwithafreshairexchangeofthree(3)airchangesperhour.IfHVACmustbeshutdownthenanexhaustmustbeprovidedto

removeheat.

Noplumbing,HVAC,orelectricalconduitshallpassthroughorbedirectlyabovethecommunicationsroom.Thespaceabovetheceilingis

neededforbroadbandamplifiersand/orassortedequipment.

ELECTRICALLightingshallbefour(4)feetfluorescentandprovideaminimumof100FC/SFandconnectedtotheemergencygeneratorwhen

available.

Multiple,fourplex,ACoutletsmustbeprovidedtopowertelephonekeysystems,computerinterfacesandothertelecommunications

requirements.Outletsmustbeflushwhencutthroughplywood.Alloutletsshallbeconnectedtoadedicatedcircuitbreaker.Eachdedicated

electricalcircuitshallbe20amp,110V,60Hz'stype.Allcircuitsmustbetiedtoanemergencygenerator.

Allbreakerboxesaretobelabeledandidentifiedtoavoidbeingturnedoffinerror.

*Someequipmentwillrequireadditionalamperage,thiswillneedtobeverifiedduringthedesignstage.

GROUNDING

Allcommunicationsroomsshallhaveagroundingbarwhichshallbetwelve(12)inchesbyone(1)inchwithpredrilled1/4inchholes.Thisbar

shallbeattachedtothemainbuildinggroundingsystemwithawirenotsmallerthan#2AWGcopper.

Eachdistributionpointshallbegroundedtothemainbuildingground,NECrequirementshallbefollowed.

Thereshallbeagroundingbarateachdistributionpanel.Thegroundbarshallbeconnectedtobuildinggroundwithamaximumresistanceof

0.5ohmsorless.

LABELING

Communications,computerandtelevisionconduitistobeclearlyidentified,ateveryjunctionbox,viaapaintedsectionorbyuseofconduit

stickersindicatingeachconduitrun;Blue=telephone,Green=computer,Yellow=television,Orange=fiberoptic.

AllIntermediateDistributionFrames,BuildingDistributionFramesandconnectingblocksmustbeproperlyidentifiedbydestination.

Allrisercablesshallbeproperlymarked.Markeristobeaflatpieceofaluminumorstainlesssteel.Thismarkingshallbepermanentand

indicate:

TheOrigination(Cableitisfeedingfrom).

TheDestination(Telecommunicationsroomitisfeeding).

Allvoiceanddatacablepairsinrisercablesortheentrancecablemustbeterminatedonaconnectingblockandidentified.

CABLE

GENERAL

A50percentgrowthfactorshallbebuiltinandprovidedforunlessotherwisespecified;consequentlyanycableworkthatpertainsto

telecommunicationsmustbedesignedand/orapprovedbyCommunicationsSystems.

Eachtelephoneanddatacableshallhaveaminimumoffour(4)pairs;insomecasesalargercablemayberequired.CommunicationsSystems

willinformthecontractorinsuchcases.


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Plenumcommunicationscablemayberunexposedaboveceilings,providedthiscablingissupportedindependentofotherutilities,suchas

conduits,pipes,ceilingsupportsystems,andnotlaiddirectlyontheceilingpanels.UseofPlenumcablemustbeapprovedbyCommunications

Systems.

AllcablesfromtheBDFmustbe100percentterminatedineachIDFifapplicableandapprovedbyCommunicationsSystems.

Tofacilitatefuturecableinstallationsanewpullstring,tiedoffatbothends,shallbeinstalledinconduitsimultaneouslywiththepullinof

cable.

Ingeneralallcommunicationwiresshallbecopper,#24AWGminimum,Level5forvoice,level6fordata,howeveruserneedsshalldictatethe

cabletypeandlevel.ThetypeandlevelofwirerequiredmustbeobtainedfromCommunicationsSystems.TheUniversityisutilizingtheAMP

productlineasthestandardforcampus.

RACKSANDPANELS

GENERAL

Undernocircumstancesshallelectricaloranyotherutilitypanelbelocatedinthecommunicationsroom.Allwallsaretobeusedforblocksand

terminations.

Eachdistributionpanelshallhavea3/4inchfiretreatedplywoodbackboardwhichhasbeenpaintedwithtwo(2)coatsoffireresistantpaintof

aneutralcolor.Thebackboardwillfacilitateinstallationofterminalblocksandassociatedwiring.Eachdistributionpointshallbeidentifiedasabuildingentranceand/orafloorservicepanel.

Junctionboxesaretobeprovidedonanyconduitrunlongerthan100feet.

AllvoiceterminationsattheBDF(BuildingDistributionFrame)willbeonstandardraised66M150typeconnectingblocks.Allterminationsat

theIDF(IntermediateDistributionFrame)willberaised66M150typeconnectingblocks.

WIREDRESS

VOICESTATIONWIRESOrganizeandlabelthecablesinnumericroomnumberorder.Forexample;withmultipleoutletslabelclockwiseas

youentertheroom;A,B,Cor1,2,3.

Individuallybundleandroutetheunshieldedvoicepairgroupstoeachofthevoicepunchdownblockcolumns,locatedonthewiringsurface

labeled"Voice".

TYPEIANDTYPEIISTATIONWIRESDropfromcommunicationsroomcabletraybehindpatchpanelrack.Organizeandlabelthecablesin

numericroomnumberorder.WhenusingTypeII,separateshieldedandunshieldedpairs6inchesbelowcabletray.Insurethattheshielding

braiddoesnotcontactthecabletray.IndividuallybundleandroutetheTypeIIunshieldedtwistedpairstothepunchdownblockcolumns,

locateddirectlybehindtherackorinarackpatchpanel.

RACKANDPATCHPANEL

Mountan8footNewtonrack,partnumber4008B9(EIAstandardorequivalent),intheindicatedposition.Positiontheracktomaintaina

minimumofthree(3)feetclearancefromthefrontoftheracktothefrontfacingroomwallandthree(3)feetclearancefromtherearofthe

racktotherearfacingroomwall.Ifarowofracksistobeinstalledinacommunicationsroom,maintainaminimumoftwo(2)footclearance

fromtherightmostorleftmostracktotheopposingwall.AnchorrackstothefinishedfloorwithaNewtonrackmountingkit.Groundtherack

tothecommunicationsroomgroundingbussbarwith#6AWGcopperwire.

Mountthepatchpanel(withgroundingtower)inthetopmostrackposition.Layoutthepatchpanelinascendingroomnumberorderfromtop

lefttobottomright.

Routetheshieldedpairsthroughthepatchpanelwireguidesandthroughthegroundingtowershield,fasteningclampsenroutetothe

connectoronthefaceofthepatchpanel.


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RACKSANDPANELS,CONTINUED

PUNCHDOWN

Laydownallstationwirepairsinnumericroomnumberorderfromlowestroomnumberatthetopleftmostpositiontothehighestroom

numberatthebottomrightposition.UseSiemonsblockmountingbrackets,partnumber89B,witheveryinstalledblock.Routeallcablestobe

puncheddowntotheseblocksunderthemountingbracket.Fastenthemountingbracketstotheplywoodwiringsurfacewith#10screwsx3/4

inch.

Voice4PairUseSiemons,partnumber66MI50,white50pair66blockswith#89Bmountingbrackets.Locatethepunchblocksonthe

plywoodwiringsurfaceintheareadesignatedasVoiceStationWires.Useoneblockwidthspacingbetweenadjacentrowsofblocksandlay

downamaximumoffourblocksinacolumn.Punchdownthefour(4)unshieldedpairsontheblockasindicatedontheaccompanyingdiagram.

Data4PairAlldatawiringterminatesdirectlytothepatchpanels.

ReferanyquestionsspecificallynotaddressedinthisdocumenttoCommunicationsSystems.


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ContentsSUBJECTPAGE

GENERAL.............................................................................................................................13

OVERVIEW..........................................................................................................................13

LABELING............................................................................................................................13

WIRING...............................................................................................................................13

OUTLETLOCATION.............................................................................................................14

LOCATIONSANDQUANTITIES.............................................................................................14

OUTLETINSTALLATION.......................................................................................................14

MOUNTING.........................................................................................................................14

CONDUIT.............................................................................................................................15

GENERAL.............................................................................................................................15

CONDUITCAPACITY.............................................................................................................15

LADDERTRAYS....................................................................................................................16

GENERAL............................................................................................................................16

MOUNTING.........................................................................................................................16


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GENERALOVERVIEW

AlltelephoneanddatastationwiringshallbecontinuouswirefromtheIDFtothecommunicationoutlet.

Thedepartment'spresentandfuturerequirementswilldeterminetheneedsofmultiplejackoutlets.Finalapprovalforthelayoutofjack

outletsshallrestwithCommunicationsSystems.Duringtheprogrammingstageinformationwillbeprovidedtotheconsultantforinclusionin

theproject.

ThefollowingterminationdevicesareacceptableAMP.ConsultCommunicationsSystemsforfinalapprovalofalternatedevices.

AllvoiceoutletsshallterminateinUSOCRJ11(X)six(8)conductormodularjackassembliesandextrapairsshallbemarkedasspareatits

locationontheterminalblock.

WirecolorcodingshallbeperAT&T258andWesternElectricspecifications.

Thetotalwirepathlengthfromtheoutlettothecommunicationsroommustnotexceed275feetinanycase.Thisisimportanttomeet

EthernetrequirementsofIEEE802.3.

LABELING

Eachendofallcablesandallpairswillbelabeledattheirterminationlocations.

Alljacksshallbemarkedatthepointofmanufacturerwithengravedlettersand/orsymbolsindicatingthatthetopjackisvoiceandthatthe

bottomjackisdata.Horizontalmountedjackpositionsshallbedataontheleftandvoiceontheright.Alljackswillbemarkedalphabetically

andbeginclockwisearoundtheroom,e.g.throughthemainentrancetotheleft,jacksshallread102A,102B,etc..

Allmodularjackassembliesmustbelabeledandidentified.

Allcommunicationoutletsnotinuse,eitherwiredorempty,musthaveablankplatecoveringtheoutletandthewireshallbetaggedand

identifiedwiththelocationoftheoriginatingIDForBDF.Whenacontractorprovidesthewiring,an"AsBuilt"drawingwithallroomjacks

identifiedmustbeprovided.

WIRING

Thefollowingcableandwiring,becauseoftheirdurabilityandreliabilityamongcertifiedbrands,arerecommendedforuseattheLongwood

University.OnlywiththeapprovalofCommunicationsSystemscananalternativeorequivalentbeused.Asampleoftheequivalentcableor

wiremustaccompanytherequest.

Voice4PairUseonlyAMPLevel5wire,grayincolor.

Data4PairUseonlyAMPLevel6wire,blueincolor.


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OUTLETLOCATION

LOCATIONSUnlessotherwisespecified,thefollowingnumberofoutletsshallbeinstalledinthefollowinglocationANDquantities,depending

onthefunctionforthatparticularoffice/room.

QUANTITIES

Faculty/AdministrativeOffices:Eachofficeshallhavetwo(2)communicationoutletsperdesignatedoccupant.

Clerical/StaffOffices:Two(2)communicationoutlets,one(1)atthelocationofeachdeskandone(1)additionaloutletforafacsimileor

printer.Eachadditionalstaffmemberinthesameareawillrequireadditionaloutlets.

ConferenceRooms:Aminimumoffour(4)communicationoutletsperroom.One(1)outletshallbelocatedoneachwall.Roomswithmore

than500squarefeetshallhaveadditionaloutletsequallyspacedoneachwall.Theseoutletsarenottobelocatedonentryorwindowwalls.

Someareasmayrequiretheconferencetabletobewired.

Laboratories/GraduateStudentOffices:Two(2)wiredcommunicationsoutletsforeveryoccupant.Additionaloutletrequirementswillbe

determinedbasedonsizeandinthedesignphaseoftheproject.

Classrooms/LectureHalls/Auditoriums:One(1)tofour(4)communicationoutletsdependingonroomandstudentoccupancysize.

NOTE:*Threeoutletsinthefrontofroomattheinstructionpodium.Wirelessconnectionportswillneedtobeaboveceilinggrid.Numberof

portsrequiredwilldependonoccupancy.Standardis1portpertwentyoccupants.

ResidenceHalls:One(1)communicationoutletperoccupantofeachroom.Thelocationwillbedeterminedduringdesignstagesofthe

project.

StorageAreas:One(1)communicationoutletperroom.Two(2)outletsforroomsover500squarefeetandone(1)additionaloutletforeach

additional2000squarefeet.

JanitorClosets:Someclosetsmayrequirecommunicationsoutletsfortelephones,computersortimereportingdevices.

OUTLETINSTALLATION

MOUNTING

UseadualgangoutletboxsimilartoSteelCity,partnumber721713/4.Whenmountingtheoutletboxinasteelstuddedwall,useaback

brace.

UseonlySteelCityplasterrings,partnumber72C13,(singlegang)or72C17(doublegang).Itisabsolutelycriticalthattheinsideopeningarea

matchtheoutletinstallationenclosure.

Theplasterringsmustbelevelandpositionedflushwiththefinishedsurface.

Forwalltelephoneonlyoutletsuseasinglegangplasterring.

Outletsaretobemountedatstandardindustryheightsandpositions,unlessotherwisespecifiedbyCommunicationsSystems.Standard

mountingheightofcommunicationoutlets:

Desk18inches,AFF.(Dualgangplasterring)

Wall60inches,AFF.(Singlegangplasterringonly)


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Handicappedwallmount48inches,AFF.(Singlegangplasterringonly)

CATVisnormallyinstalledattheheightofTVmounting.Useonlyasinglegangplasterring.

Note:ElectricaloutletsshallbeprovidedforTVandprojectiondevices.

CONDUIT

GENERAL

AllconduitworkshallmeetthespecificationsofNationalElectricalCodeconduitinstallations.

Allvoice,dataandvideowiringinsideroomsshallbeprotectedbymetallicconduitorothermeanssuchaswiremoldortroughsinthefloor.

PVCconduitandplasticmoldingarenotacceptableexceptincausticenvironments.Aluminumisnotacceptableincausticenvironments.EMT

conduitshallbeusedforallinteriorwiring.Allconduitistobeconcealed.

Nomorethananequivalentofthree(3)90degreebendsareallowedinarunbetweenjunctionboxesorpullboxes.

Theuseofplenumcableinsteadofconduitshallbedeterminedonacasebycasebasis.CommunicationsSystemsmustbecontactedfor

approval.

AllEMTfittingsshallbecompressiontype.SetscrewtypefittingsareNOTacceptableonconduitlessthan21/2inchesindiameter.

Inmajorrenovationandnewconstructionprojects,thecontractshallincludeprovisionsforinstallationoffour(4)riserconduits(4inches

minimumdiameter)fromtheBDFtoeachIDF.Apullstringandappropriatejunctionpullboxshallalsobeprovidedineachconduitrunto

facilitatefutureinstallationofcable(s).

Allconduitinslabshallbeaminimumof11/4inchesgalvanizedsteelwiththreadedfittings.

AllexceptionsshallbedeterminedduringthedesignstageoftheprojectandshallbesubjecttotheapprovalofCommunicationsSystems.

Allsleevesmustprotrudefour(4)inchesAFFandbelowandbecappedatbothends.

CoordinatewithCommunicationsSystemsforthenumberofconduitsenteringthefacility.

Nohorizontalconduitrunshallbemorethan100feetbetweenpullboxes,perNECrequirements.

Conduitfortelephoneorcomputeroutletsshallbeterminatedinadualgangbox.SteelCity,partnumbers521511,721511,52C17or72C

17forone(1)inchwithdualgangplasterringand521513/4,721513/4,52C13or72C13,for3/4inchwithsinglegangplasticring.

Allcommunicationsoutletsshallbeone(1)inchconduit,withanabsoluteminimumofbends,fromtheoutlettothecabletray,wirewayor

homerundirectlytothecommunicationsroom.A3/4inchconduitisacceptableforsinglewallphoneoutlets.Pullboxesmustbeinstalledevery

270degreesor100feetoftheconduitrun.Useonlycompressionfittingsateveryjoint.

Inthecaseofaconduitterminatinginacabletray,theconduitmustbemechanicallyfastenedtothesideofthecabletrayandtheconduit

endatthetraymustbeterminatedinagroundingbushingandwirebondedtothetray.Note:Ametalstrapisnotacceptableasameansof

groundingtheconduittoacabletray.

Inthecaseofconduitterminatinginthecommunicationsroom,theconduitmustbeterminatedwithagroundingbushingandwirebonded

totheroomgroundbusbar.

CONDUITCAPACITY

Conduitcapacitywillbedependentonnumberandtypeofcablesutilized.Cablejackethasvaryingthicknesswhichwillminimizethenumber

ofcablesinstalled.


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LADDERTRAYS

GENERAL

Allladdertraysshallbedesignedtoaccommodatevoice,video,anddatacabling;consequentlyanycableworkthatpertainsto

telecommunicationsmustbedesignedand/orapprovedbyCommunicationsSystems.

Theminimumdimensionsforaladdertrayshallbe12incheswideand4inchesdeep.

Contractdocumentsshallshowcrosssectionofthecommunicationwirewayorcabletray.Thedrawingmustshowreferencetootherutilities

inthebuilding.

Considerationmaybegivenforinstallationofothertypesofcablesinaladdertraytopreventinterferenceonunshieldedcables.Locationof

suchinstallationshallbeapprovedbyCommunicationsSystems.

Laddertray(cabletray)orwirewayistobesupportedwithallthreadrodsinatrapezeformasdiagrammed.Supportsforcabletrayslarger

than12inchesinwidtharetobeinstalledatamaximumdistanceoffive(5)feetapartoraccordingtothemanufacturersspecifications,

whicheverismorestringent.Supportsforcabletrays12inchesorlessmaybefartherapartbutmustmeetthemanufacturersinstallation

requirements.Asinglesupportisnotacceptable.

CommunicationsSystemswillnotinstallanycableorperformanyworkuntilallinstallationsaremadetocomplywithspecifications.

MOUNTING

Cabletraysmustbeaminimumofone(1)footfromtheceilingandaminimumofeight(8)feetAFF.Traysaretobeloopedtheentire

parameteroftheroom.

Installsweepingfactory90'sforallturns.Useendoftraytermination'swherewiredropsdowntowallstopreventabrasionsandcutsfrom

metaltrayedges.Useatrapezecabletraymountingmethodsuspendedby1/2inchallthread.Fastenallthreadtoceilinganchors,allowingno

bendsinallthread.Supportthecabletrayinthismannerateverysectiontosectionjunctionandatfive(5)feettosix(6)feetintervals(mid

span)betweenjoints.Innocaseshallthetraybecloserthaneighteen(18)inchesfromthestructuralceiling,ductsorpipes,consideringall

otherpossibleobstructions.Aminimumoftwo(2)feetdistancefromlighting,especiallyfluorescentlighting,isrequired.


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19

5TELEVISIONCABLEANDOUTLETS

ContentsSUBJECTPAGE

OVERVIEW.........................................................................................................................18

GENERAL............................................................................................................................18

LABELING............................................................................................................................18

CABLE.................................................................................................................................18

OUTLETS..............................................................................................................................18

VIDEO/PROJECTIONDEVICES,CABLINGANDOUTLETS.......................................................18

GENERAL.............................................................................................................................18


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5TELEVISIONCABLEANDOUTLETSOVERVIEW

GENERAL

Forfurtherdetailedspecificationsregardingtelevisioncables,contacttheDepartmentofInstructionalTelecommunications.

LABELINGTelevisioncablesaretobeclearlyidentifiedviaapaintedsectionorbyuseofconduitstickersindicatingeachconduitrun;Yellow=

television.

CABLETelevisionoutletcableshallbeRG6/Utypequadshieldedcoaxial75ohm,Belden,partnumber1189Aorequivalent.

TelevisionrisercablesinmultistorybuildingsorbuildingswithfirstfloorIDF'sshallbe75ohm'sandcabledesignmustbeobtained.Asarule

theminimumacceptablerisercableistype500coaxialcable.ObtainallcablesizesfromCommunicationsSystems.

Allcableshallberunwithinconduits.

Eachoutletshallbehomeruntothenearestcommunicationsroom.

VIDEO/PROJECTIONDEVICES,CABLINGANDOUTLETS

GENERAL

CommunicationsSystemsorInstructionalTelecommunicationsshallprovidethespecificationsandcablepartsforprojectiondevicesand/or

monitors.

Projectiondevicesareeitherceilingortabletypemounts.Ineachcasetheconduitmustbeconnectedtothefrontoftheclassroomatthe

podiumorinstructorstation.


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ContentsSUBJECTPAGE

LIGHTNINGPROTECTION..................................................................................................20

GENERAL...........................................................................................................................20

MATERIALS.......................................................................................................................20

GROUNDING.....................................................................................................................20

GENERAL..........................................................................................................................20

BONDING.........................................................................................................................20

GENERAL...........................................................................................................................20

DRAWINGS........................................................................................................................20


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LIGHTNINGPROTECTION

GENERAL

Lightningprotectionoftelecommunicationsfacilitiesisessential.Whilefederalandstatestandardsmustbeadheredto,localconditionsmay

requireadditionalinvestigationsand/ormodificationstomeetsite,equipment,environmentalorsafetyrequirements.

NECArticles250"Grounding"and800"CommunicationsCircuits"covergeneralrequirementsforgrounding,bondingandprotectingelectrical

andcommunicationscircuits.NFPA78"LightningProtection"addresseszoneprotectionandotheritemswhicharebeneficial.

Allcablingandwiring(includinggrounding)withinthebuildingandentrancefacilitieswithprotectionfromlightningandpowerfailurevia

groundingandbondingwillbeaccomplishedundertheconstructioncontract.

MATERIALS

Thethreemostfrequentlyusedlightningprotectorsarelistedbelow.ContactCommunicationsSystemsforadeterminationofthemost

appropriateprotectionforthecondition.

AT&TProtectionHousingAT&T,partnumber189ECT1100,thelastthree(3)digitsvarydependingonpairsize,i.e.,100=100pair

protector.TheprotectionmoduleshallbeCookElectric,partnumber303855.

KroneProtectionHousingKrone,partnumber6637144014/25for100pairprotection,includesprotectionmodules.Krone,partnumber

6637148018/25for200pairprotection,includesprotectionmodules.

UseCookElectric,partnumber500LCGXforsingledropsof6pairorless.

GROUNDING

GENERAL

Allgroundingshallusesinglepointschemesfromthebuildingmaintransformer,withaminimumof#2AWGsolidcopperwirewhichhasbeen

testedtoamaximumof0.5ohms.

Allshieldsshallbebondedtoacommonground.

AllrisercablemustbeshieldedandproperlygroundedtothebuildinggroundthroughgroundingfacilitiesprovidedattheBDF.

AllTypeIIstationcablemustbegroundedattheIDFbyusingaproperlysizedgroundwire(#10orlarger)whichisgroundedattheBDFwitha

connectiontothebuildingearthground.

TheshieldoftherisercableisnotapropergroundfortheIDF.

BONDING

GENERALBondingistobedurable,strongandoflowimpedancetoassureelectricalcontinuity.

Allconduitterminatingtocabletraysandwirewaysshallbemechanicallyfastened,equippedwithgroundbushingsandwirebondedtothe

tray.Thecabletrayorwirewayshallbegroundedtothemainbuildinggroundingsystemwithawirenotsmallerthan#2AWGcopper.

Aresistanceof.001ohmorlessindicatesahighqualityjunction(BICSI).

ReferanyquestionsspecificallynotaddressedinthisdocumenttoCommunicationsSystems.


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ContentsSUBJECTPAGE

INSPECTIONOFWORK.......................................................................................................22

GENERAL............................................................................................................................22

TESTING..............................................................................................................................22

GENERAL............................................................................................................................22

LOCALAREANETWORK......................................................................................................22


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INSPECTIONOFWORK

GENERAL

CommunicationsSystemsdesigneesshallhaveaccesstoconstructionsites.

ToenableCommunicationsSystemstoinspecttelecommunicationsfacilitieswork,thecontractormust:

Provideaprogressschedulewiththeinstallationoftelephoneracewaysandspacesshownasaseparateitem.

ImmediatelynotifyCommunicationsSystemsofanychangeinarchitecturaldrawingsand/orplansaffectingtelecommunications.

Provideproperaccessandfacilitiesforinspections.

NotifyCommunicationsSystemswhenanyworkisreadyforinspection.

AllundergroundworkmustbeinspectedandapprovedbyCommunicationsSystemsbeforethesiteiscoveredwithdirtor

concrete.Failuretohavetheworkinspectedshallresultinuncoveringtheareaatthecontractor'expense.

ThecontractorshallprovideafinalcheckoutcertificationletterandinspectionreportstoCommunicationsSystemsonalltelecommunications

work.

TESTING

GENERAL

ThecontractorshallsubmittoCommunicationsSystems,adetailedtestproceduretobeusedforeveryproject.Allcablesshallbetestedfor

length,attenuation,impedance,groundsshorts,continuityofcommunicationsconductorsandshields.

Uponcompletion,testresultsshallbesubmittedtoCommunicationsSystemsforfinalapprovalandacceptanceandmadepartofthe

document.Thecontractorshallguarantee100percentgoodpairsonallcables.

Communicationswillperformnecessarytestingbeforeacceptingajob.Failureduringtestingwillresultinnewcableinstallationatthe

contractorsexpense.

LOCALAREANETWORK

AllLocalAreaNetworkscablesmustbetestedtoconformwith10BaseTstandards.Alltestsshallbeperformedattherateof10Megabitsand

willbetestedforthefollowing:

Continuity

Length

Loss

Resistance

Crosstalk

Noise

RMS

Impulse


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ActiveHub

NetworkMonitor

TestresultsaretobeprovidedtoCommunicationsSystemspriortoacceptanceofthebuilding.


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26

8FIRESTOPPING

ContentsSUBJECTPAGE

OVERVIEW.........................................................................................................................25

GENERAL............................................................................................................................25


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8FIRESTOPPING

OVERVIEW

GENERAL

ProvidefireproofsealsinaccordancewiththeNationalFireProtectionAssociation(NFPA)andtheNationalElectricCode(NEC),Article30021.

FirestopallpenetrationsinaccordancewiththecurrenteditionoftheNationalElectricalCode.

Firetreatedplywood,3/4inchthickwhichhasbeenpaintedwithtwo(2)coatsoffireresistantpaintofaneutralcolor,mustbemechanically

fastenedtothewallofeachroom.Thefiretreatedplywoodistobeginatfour(4)inchesAFFandendat8feet,4inchesAFF.


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9LOCALAREANETWORKS

ContentsSUBJECTPAGE

OVERVIEW.........................................................................................................................27

GENERAL............................................................................................................................27

DETERMININGREQUIREMENTS........................................................................................27

WIRINGTYPE.....................................................................................................................27


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9LOCALAREANETWORKS

OVERVIEW

GENERAL

Allconnectionsmustbeclearlylabeledatbothends.

Useaone(1)inchhomerunconduitfromtheoutlettothecabletray,wirewayordirectlytothecommunicationsroom,withpullboxesevery

100feet.Inthecaseofanoutlet'sconduitterminatinginacabletray,theconduitmustbemechanicallyfastenedtothesideofthecabletray

andtheconduitendatthetraymustbeterminatedinagroundingbushingandwirebondedtothetray.

Thetotalwirepathlengthfromtheoutlettothecommunicationsroom,includinglossduetotermination's,mustnotexceed275feetfromthe

IDFinanycase.

DETERMININGREQUIREMENTS

ConsultCommunicationsSystemsDataCommunicationsandLocalAreaTechnicalReferencebooksfordetails.

WIRINGTYPE

AMPcategory6ewiringisutilizedfordatadrops.WirejacketmaybeplenumornonplenumdependinguponHVACtype.Terminationwillbe

AMPjackswith568bstandards.


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ContentsSUBJECTPAGE

OVERVIEW........................................................................................................................29

GENERAL............................................................................................................................29

INSTALLATION...................................................................................................................29


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OVERVIEW

GENERAL

AllfiberopticplanningandinstallationshallbeapprovedbyCommunicationsSystems.Wheninstallingfiberopticcable,itshallbepulledina

protectivelinerinsidetheconduitandprotectedinsidethemanhole,toallowfutureuseofconduitandalsopreventdamagetothecable.The

linercouldbeextended,howeverthismayvaryduetocircumstances.

Allnewoutsideplantconduitshallincludeatleasttwo(2)conduitsleevedforFiberOpticsoruseTeleDuct.Properpartsaretobeused,

consultCommunicationsSystems.Innerductsareonlyusedonexistingfacilities.

Allcablethatistobeconnectedordisconnectedfromthecampustelecommunicationsnetwork;telephone,data,video,toinclude,LocalArea

Network,WideAreaNetwork,CATVcableandfiberoptics,shallbedonebyCommunicationsSystems.

ContactCommunicationsSystemsforthetypeoffiberopticcabletobeused.

INSTALLATIONAllfiberopticcablesshallbeterminatedviaaSTConnectorandproperlyconnectedtothedistributionpointsinafiberpanel.

Jumperorpatchcordsaretobeusedtoconnectdifferentpairsofcablestogetherforcontinuationofservice.


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ContentsSUBJECTPAGE

HANDICAPPEDACCESS......................................................................................................31

GENERAL............................................................................................................................31

PUBLICPAYPHONES..........................................................................................................31

MATERIALS..........................................................................................................................31

SWIMMINGPOOLS..............................................................................................................31


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HANDICAPPEDACCESS

GENERAL

Allconduitoutletsforhousephones,corridorphones,courtesyphonesandpayphonesaretomeetheightandlocationrequirementsinthe

AmericanwithDisabilitiesActforhandicappedaccess.Thisstandardonlyreferstotelecommunicationrequirements.Allotherutilitiesarethe

responsibilityofthedepartmentinvolved.

PUBLICPAYPHONES

TT,TextTelephones(formallyTDD),mustbeaccessibletohandicappedindividuals.

Theheightofthecoinslotshallbe48inchesforallinstallations.

Ifatotalnumberoffour(4)ormorepublicpaytelephones(includingbothinteriorandexteriorphones)isprovidedatasite,andatleastone

(1)isinaninteriorlocation,thenatleastoneinteriorpublictexttelephoneshallbeprovided.

MATERIALS

SWIMMINGPOOLS

PVCconduitandplasticmoldingarenotacceptableexceptincausticenvironmentssuchasswimmingpools.Aluminumisnotacceptablein

causticenvironments.

Whenpoolsidetelephoneserviceisdesiredandthereisnobuildingneartohangattachmentson,installapedestalandruna11/4inchconduit

tothelocation.Iftheconduitlengthislongerthan100feet,installapullboxaccordingtoNEC.


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ContentsSUBJECTPAGE

OVERVIEW.........................................................................................................................33

GENERAL............................................................................................................................33

AGENCIES............................................................................................................................33


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OVERVIEW

GENERAL

Todesignfacilitiesforaneffectivetelecommunicationssystem,thedesignerandinstallermustbefamiliarwithnationalandlocalregulations.

Boththedesignerandthecontractormustbefamiliarwithandadheretothestandardsofthetelecommunicationsandbuildingindustries.

AGENCIES

Thefollowingagenciesandtheircodes,standardsandregulationsshallgovernalltelecommunicationsworkperformedattheUniversity.

ANSIAmericanNationalStandardsInstitute

BICSIBuildingIndustryConsultingServiceInternational

BOCABuildingOfficialsandCodeAdministrators(StandardBuildingCode)

EIAElectronicIndustriesAssociation

FCCFederalCommunicationsCommission

ICBOInternationalConferenceofBuildingOfficials(UniformBuildingCode)

IEEEInstituteofElectricalandElectronicEngineers,Inc.

NBCNationalBuildingCode

NFPANationalFireProtectionAssociation

NECNationalElectricalCode

TIATelecommunicationsIndustryAssociation

ULUnderwritersLaboratories

LongwoodUniversityWiringandCablingGuidelines

CommonwealthofVirginiaCommunicationsStandards


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ContentsSUBJECTPAGE

GLOSSARYANDACRONYMS..............................................................................................35


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AFFAboveFinishedFloor

AWGAmericanWireGage

BDFBuildingDistributionFrame

CDFCombinedDistributionFrame

COMMUNICATIONSSYSTEMSCommunicationsandTechnologyServices

DOWELEDDrilledholeforrebar

ECLTypeoftokenringconnector

EMTElectricalMetallicTubing

FCFootcandle

HVACHeating,VentilationandAirConditioning

HzHertz

IBMInternationalBusinessMachines

IDFIntermediateDistributionFrame

LANLocalAreaNetwork

OHMUnitofresistance

PBXPrivateBranchExchange

PVCTypeofconduit

SFSquarefoot

TTTextTelephone(formallyTDD)

WANWideAreaNetwork


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longwood wiring standards

Documents