Bow thruster battery cable size

[Andyloc]

Hi all,
Im fitting a sidepower 100kg thrust bow thruster and am trying to determine the correct battery cable dia. The length of run from the batterys will be about 3 metres and will be running from a dedicated battery,

Chers

Andy

 

[Elessar]

Hi all,
Im fitting a sidepower 100kg thrust bow thruster and am trying to determine the correct battery cable dia. The length of run from the batterys will be about 3 metres and will be running from a dedicated battery,

Chers

Andy

you'll be knocking on the door of 800 Amps and so 95 sq mm will be needed even for that short run.

2 thinner cables fine if it makes the total cross section.

big thruster - what's it for?

EDIT - forgot to ask 12 V or 24? I assumed 12 as you said battery in the singular, you can come down to 50 sq mm if its 24V

 

[pvb]

Hi all,
Im fitting a sidepower 100kg thrust bow thruster and am trying to determine the correct battery cable dia. The length of run from the batterys will be about 3 metres and will be running from a dedicated battery,

Chers

Andy

Why not simply follow the guidelines in the installation manual? It recommends 95 sq mm at 12v or 50 sq mm at 24v.

 

[VicS]

If the distance between thruster and battery is 3m giving a total cable length "there and back" of 6m

Since 95mm² cable has a resistance of approx 0.18Ω/1000m the volts loss will be 0.65 volts at 600 amps or 0.86 volts at 800 amps.