User Manual

Segment 2
1.5% voltage drop
eg. battery switch to power distribution panel
Segment 1
1.5% voltage drop
eg. battery bank to battery switch
3% voltage drop along entire circuit path (from power source to load and return)
Segment 1 + Segment 2 = 3% Voltage Drop
WIRE SIZE
DC Circuits:UseBlueSeaSystems’DCCircuitWizardonlineat
http://dc.circuitwizard.bluesea.com/ to guide you in suitable wire size
selectionforeachDCFeed,Main,andBranchCircuit.
Voltagedropalongacircuitpathiscumulative.Toachievesuitablevoltage
drop along a path consisting of multiple segments, use the DC Circuit Wizard
to assign voltage drop values to each segment that add up to the desired
voltage drop.
Be sure to measure the length of wire from power source to load and return.
Wire Size (AWG)
Allowable Amperage of Conductors
Outside Engine Spaces Inside Engine Spaces
16 25.0 21.3
14 35.0 29.8
12 45.0 38.3
10 60.0 51.0
8 80.0 68.0
6 120.0 102.0
4 160.0 136.0
2 210.0 178.5
ThisABYCtableisforwirewith105°C(122°F)insulationratingandnomore
than2conductorsbundledtogether.Itisnotsuitableforsizingexibleshore
powercords.Thevalueswillallowconductorstoreachtheirfull105°C
(122°F)ratedtemperature.
Many experts in the marine electrical industry recommend using wires that are
one or two sizes larger than shown in the table above to reduce the operating
temperature of the wire.
5
Formoreinformationgotowww.bluesea.com
ABYC E-11 Table IV 105°C (122°F) Wire
AC Circuits:ForeachACFeedandBranchcircuit,theABYCtablebelow
lists the minimum wire size.