Specifications

Masterclock, Inc.
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phone(USAandCanada):1‐800‐940‐2248|phone(international):+1‐636‐724‐3666
email:[e-mail]|online:www.masterclock.com
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Installation:
Formaximumprotectioninstalltwosurgearrestors,one
outside,eitherclosetotheantennaoratthepointwherethe
coaxialcableentersthebuildingandasecondasclosetothe
receivingequipment.Agoodruleofthumbtorememberisthat
alllinesenteringorexitingabuildingneed
protection.
TheSA90isabidirectionalRFdevice.EitherRFportmaybe
connectedtotheequipmentsideortheantennasideofthe
transmissionlineinterfacetoprovideprotection.Donotleave
theRFportsexposedwheninstalledoutdoors.
Thesurgearrestormustbegroundedbyattachingaground
wiretothegroundinglug.Thiswiremustbeattachedtoa
mastergroundbarorthesystemsearth groundingtoensurea
lowimpedancepathtoground.Duringinstallation,all
groundingcontactsurfacesmustbeclean,dry,andfreeof
oxidation.
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GroundingRecommendations:
Aprotectionsystemwithapoorgroundisthesameashaving
noprotectionatall.
Recommendedgroundsaretheutilitycompanyground,a
groundrod,wellcasings,andcoldwaterpipesthatareof
continuousmetal.Anoteofcaution,sometimesthemetal‐cold
waterpipesarerepairedand/orextended
PVCpiping.The
introductionofPVCmaterialrendersthecoldwaterpipe
groundunacceptable.Athoroughinvestigationofacoldwater
pipegroundisimportantsincethePVCrepairsorextensions
maybecoveredbydrywall.Groundsthatareunacceptable
includesprinklerpipes,PVCpipe,conduit,buriedwireandany
groundthatcannotbeverified.
Bondingensuresthemosteffectiveground.Bondingtiesallof
thegroundsinthebuildingtogetherelectrically.Ifthereisa
riseingroundpotentialandallofthegroundsarebonded,no
damagewilloccursinceitisdifferentialvoltagethatcauses
problems.
Itis
absolutelynecessarytomakesurethatthegroundusedfor
theACpoweristhesameasthegroundusedforthedata‐line
surgeprotectors.Acommongroundreferencemustbe
achievedforallequipment.
Allgroundwiresmustbeasshortaspossibleanditis
imperative
thatthegroundwirenotbecoilednorlooped–it
mustbeasstraightaspossible.Regardingthediameterofthe
groundwire:thelargerthebetter.
Finally,theearthgroundresistanceonwhichthewhole
groundingsystemrelies,mustbelessthan5ohmsbetweenany
twopoints
withinthegroundsystem.
102
Surge Arrestor Installation
Model # SA90-SMA
WARNING
Ensurethattheantennaandcoaxialcable
thatthesurgearrestorisprotectingisnot
exposedtodirectlightningstrikes.This
deviceoffersnoprotectionforsuch
strikesandwillbedestroyed,alongwith
whateverequipmentthatitisconnected
to,byadirectstrike.
Notice:
Theinstallation,maintenance,orremovalof
antennaandsurgearrestorsystemsrequires
qualified,experiencedpersonnel.These
installationrecommendationsarewrittenfor
suchpersonnel.Installationsofthistypeof
energysuppressionequipmentshouldbemade
inaccordancewithlocalsafetyandelectrical
codesandwithregardtogoodelectricaland
engineeringpractices.
Ifyouhavequestions
regardingtheuseofthistypeofproductwith
respecttoyourinstallation,contactalocal
licensedelectricalcontractorforthelatest
electricalcodesandguidelines.Innoevent
shallMasterclock,Inc.beliableforanydirect,
indirect,special,incidental,orconsequential
damagescausedfromthe
installationoruseof
thisproduct.