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Sharingabreaker
Wheremorethan1pieceofequipmentsharesa
breakeryoumustprovideprotectionfortheindividual
circuits.E.g.byconnectinganin-linefuseforeach
powercircuit.
D116 37-2
2
4 4
1
3
+
-
1
Positive(+)bar
2
Negative(-)bar
3
Circuitbreaker
4Fuse
Wherepossible,connectindividualitemsof
equipmenttoindividualcircuitbreakers.Wherethis
isnotpossible,useindividualin-linefusestoprovide
thenecessaryprotection.
Warning:Productgrounding
Beforeapplyingpowertothisproduct,
ensureithasbeencorrectlygrounded,in
accordancewiththeinstructionsprovided.
GroundingDedicateddrainwire
Thepowercablesuppliedwiththisproductincludes
adedicatedshield(drain)wireforconnectiontoa
vessel'sRFgroundpoint.
ItisimportantthataneffectiveRFgroundis
connectedtothesystem.Asinglegroundpoint
shouldbeusedforallequipment.Theunitcanbe
groundedbyconnectingtheshield(drain)wireof
thepowercabletothevessel'sRFgroundpoint.
OnvesselswithoutanRFgroundsystemtheshield
(drain)wireshouldbeconnecteddirectlytothe
negativebatteryterminal.
Thedcpowersystemshouldbeeither:
Negativegrounded,withthenegativebattery
terminalconnectedtothevessel'sground.
Floating,withneitherbatteryterminalconnected
tothevessel'sground
Warning:Positivegroundsystems
Donotconnectthisunittoasystemwhich
haspositivegrounding.
Groundingadditionaldedicateddrainwire
required(CP470only)
TheCP470requiresanadditionaldedicateddrain
wire.Thiswiresupplementsthedrainwire(shield)
thatispartoftheproduct’spowercable.
CP470sonarmoduleadditionalgrounding
connection
D13308-1
5
1
2
3
4
ItemDescription
1Nut
2
Springwasher
3Washer
4Additionaldrainwire
5
Productadditionalgroundpoint
Connectoneendoftheadditionaldrainwiretoyour
product.T olocatetheadditionalgroundingpointon
yourproduct,refertotheConnectionsillustrationin
thisdocument.
Connecttheotherendoftheadditionaldrainwire
tothesamepointasthepowercabledrainwire
(shield).Thiswillbeeitherthevessel'sRFground
point,oronvesselswithoutanRFgroundsystem,
thenegativebatteryterminal.
Thedcpowersystemshouldbeeither:
Negativegrounded,withthenegativebattery
terminalconnectedtothevessel'sground;or
Floating,withneitherbatteryterminalconnected
tothevessel'sground.
Ifseveralitemsrequiregrounding,theymayrst
beconnectedtoasinglelocalpoint(e.g.within
aswitchpanel),withthispointconnectedviaa
single,appropriately-ratedconductor,tothevessel’s
commonRFgroundpoint.
Implementation
Thepreferredminimumrequirementforthepathto
groundisviaaattinnedcopperbraid,witha30A
rating(1/4inch)orgreater.Ifthisisnotpossible,an
equivalentstrandedwireconductormaybeused,
ratedasfollows:
forrunsof<1m(3ft),use6mm
2
(#10AWG)or
greater.
forrunsof>1m(3ft),use8mm
2
(#8AWG)or
greater.
Cablesandconnections29
29


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