Sabre 30 - 22:00 LIGHTNING PROTECTION AND BONDING SYSTEMS

3/21/2017 Sabre30OwnersManual
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keepsallfittingsatthesameelectricalpotentialtominimizetheeffectsofany
galvanicorelectricalcorrosionwhichmayoccur.
Anyadditionalunderwaterhardwareinstalledontheboatmustbetiedintothebonding
systemtomaintainproperoperationandprotectionfromcorrosion.
Theintegrityandoperationofthesystemshouldbecheckedeachyearatlaunchingand
haulingtimes.
RefertothelighteningprotectionandbondingsystemdiagramsinthebackoftheOwners
Manualforthewiringdetailsofyourboat.
22:02LIGHTENINGPROTECTIONSYSTEM
:Thelighteningprotectionsystemprovidesa
"cone"ofprotectionaroundtheboatintheevenofalighteningstorm.Groundingwires
of#8gaugecopperconnectallchainplatesandthemaststeptothekeel.
Theintegrityofthelighteninggroundsystemshouldbecheckedregularly.Inspectall
wireandterminalconnectionsatthemaststep,allchainplatesandthekeepfortightness
andsignsofcorrosion.
Lighteningstrikesareunpredictable,soduecautionduringastormisadvised.
Allownooneinthewaterduringanelectricalstorm.Remaininsidetheboatandavoid
makingcontactwithanylargemetalobjectssuchasthemast,shrouds,stanchions,bow
pulpit,sternrailoranyoftheitemsconnectstothelighteninggroundingsystem,
especiallyinsuchawayastobridgebetweenanyoftheseitems.
Ifaboatisstruckbylightening,thereislikelytobedamagetodelicateelectronic
instrumentsduetoahighvoltagelowamperesurgeofelectricitythroughtheboat.Ifa
boatisstruckbylightening,compassesandelectricalgearmustbecheckedfordamage
and/orchangeincalibration.
RefertothelighteningprotectionandbondingsystemdiagramsinthebackoftheOwners
Manualforthewiringdetailsofyourboat.
23:00UNDERWATERCORROSION
Corrosionofunderwaterhardwareismostoftencausedbygalvanicactionorinducedby
strayelectricalcurrent.Thisconditionisoftenreferredtoas"Electrolysis".To
minimizetheriskofthesetypesofcorrosion,SabreYachtsusescarefuldesign,material
selectionandinspection.Inspiteofourbestefforts,youmayfindthatyourSabrehas
acorrosionproblem.Thefollowingbackgroundmaterialhasbeenpreparedtoassistyouin
stoppingthecorrosion.
23:01GALVANICCORROSION
:Galvaniccorrosionoccurswhentwodissimilarmetalsarein
physicalcontactwitheachotherinseawater.Theelectricalpotentialbetweenthetwo
metalscausesacurrenttoflowfromonetotheother.EachSabreisequippedwith
underwaterhardwareofsimilarmetalsinthegalvanicserieswithadditionalcorrosion
protectionbeingprovidedbyaheavydutybondingsystem.Sacrificialzincanodesshould
beusedasameansofprotectinglargepiecesofunderwaterhardware,suchaspropellers
andshafts.
ELECTROLYSIS:Electrolysisresultswhenadirectcurrentfromabatteryorotherexternal
sourcecausesametalincontactwithseawatertobecome"anodic"andsacrificematerial
tothesolution.Thereactionisbasicallythesameasgalvaniccorrosion.However,much
highervoltagesmaybeinvolvedandthecorrosioncanbeveryrapid.Althoughsacrificial
zincanodesmayhelpminimizetheeffectsofstraycurrentcorrosion,itcanonlybe
correctedatitssource.Straycurrentcorrosionismostoftentracedtodamagedorloose
wireconnections,malfunctioningequipmentorimproperlywiredequipment.Thestray
currentmayalsocomefromasourceexternaltotheboat.
23:02CHECKLIST
:ThefollowingchecklistandthewiringdiagramsforyourSabrewill
assistyouinlocatingandminimizingsomeofthecommoncausesofunderwatercorrosion.
1.Checkthefollowingwiringconnectionsforclean,tightscontactandintegrity: