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Jan 23rd, 2013
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Depth finder power cord at trolling motor #13418028 01/27/20 08:20 PM
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Frank the Tank Offline OP
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I accidentally cut mine took short. What gauge wire do I get? Marine grade and what gauge?


Sinner. Far from perfect. Forgiven.
Re: Depth finder power cord at trolling motor [Re: Frank the Tank] #13418158 01/27/20 10:41 PM
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Wayne P. Offline
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Minimum of 10 gauge from the battery to the power cord.
Marine grade tinned conductors.


Humminbird Helix 12 CHIRP SI, Helix 12 CHIRP MEGA SI+ GPS G3N, 1198c SI, Helix 7 CHIRP SI GPS G2,
Helix 7 CHIRP MEGA SI GPS G3, Helix 10 MEGA DI+ GPS G3N, SOLIX 12 SI, 360, MEGA 360, RC-1
Re: Depth finder power cord at trolling motor [Re: Frank the Tank] #13418174 01/27/20 11:01 PM
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Frank the Tank Offline OP
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By minimum do you mean 10 or plus like 16 or 18 or less than that like 6 or 8? I have a wiring block right below the foot pedal. Don’t use that?


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Re: Depth finder power cord at trolling motor [Re: Frank the Tank] #13418184 01/27/20 11:07 PM
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Wayne P. Offline
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Originally Posted by Frank the Tank
By minimum do you mean 10 or plus like 16 or 18 or less than that like 6 or 8? I have a wiring block right below the foot pedal. Don’t use that?


Minimum=no less than

16 and 18 is LESS than 10=smaller diameter and more resistance.
Are you not familiar with what the wire size numbers mean?

The idea is to have the LEAST voltage drop from the battery to the unit power cord due to wire length. You overcome wire length resistance with DIAMETER.


Humminbird Helix 12 CHIRP SI, Helix 12 CHIRP MEGA SI+ GPS G3N, 1198c SI, Helix 7 CHIRP SI GPS G2,
Helix 7 CHIRP MEGA SI GPS G3, Helix 10 MEGA DI+ GPS G3N, SOLIX 12 SI, 360, MEGA 360, RC-1
Re: Depth finder power cord at trolling motor [Re: Wayne P.] #13418200 01/27/20 11:21 PM
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BillS2006 Offline
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Originally Posted by Wayne P.
Minimum of 10 gauge from the battery to the power cord.
Marine grade tinned conductors.


10 gauge for a depth finder?



Re: Depth finder power cord at trolling motor [Re: Frank the Tank] #13418223 01/27/20 11:44 PM
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Frank the Tank Offline OP
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No sir. I’m not. Please take me to school


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Re: Depth finder power cord at trolling motor [Re: Frank the Tank] #13418251 01/28/20 12:05 AM
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Wayne P. Offline
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Originally Posted by Frank the Tank
No sir. I’m not. Please take me to school


The larger the number, the smaller the wire diameter.

Notice the Resistance column in this chart where the resistance is higher as the size gets smaller:

https://platt.com/cutsheets/multiple/awg%20conductors.pdf


Humminbird Helix 12 CHIRP SI, Helix 12 CHIRP MEGA SI+ GPS G3N, 1198c SI, Helix 7 CHIRP SI GPS G2,
Helix 7 CHIRP MEGA SI GPS G3, Helix 10 MEGA DI+ GPS G3N, SOLIX 12 SI, 360, MEGA 360, RC-1
Re: Depth finder power cord at trolling motor [Re: Frank the Tank] #13418843 01/28/20 03:48 PM
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10 gage seems kinda big unless you have a unit that is super sensitive to voltage drop, you have a really long run or you plan on also running something else in the future. I got my front unit (9 in helix) on 14 gage dedicated run and never had an issue. That being said, if running the wire is a real PITA I might go bigger than I need just to allow for future equipment up front. I just ran new set of wires to the front of my center console this last weekend. It took hours and I had to cut a new access hole. While I was at it, I ran an extra set for some new shiny toy down the road.


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Re: Depth finder power cord at trolling motor [Re: Frank the Tank] #13418973 01/28/20 05:09 PM
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Originally Posted by Frank the Tank
I accidentally cut mine took short. What gauge wire do I get? Marine grade and what gauge?

bang I hate it when I do that!


1999 Triton TX21/225 Mercury Optimax
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