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Size of battery cables

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cluros(at)gmail.com
Guest

Posted: Thu Jun 09, 2016 10:50 am Post subject: Size of battery cables

Planning on moving my battery from the tail to the firewall. Current wiring is 2 gauge and so far all the homebuilders I have talked to say minimum 4 gauge but when I go on Aircraft Spruce the only battery cable they sell is 6 gauge. Does anyone use this stuff? I'm going to reuse the 2 gauge for the starter cable but has anyone used 6 gauge wire on a low current, short run install? Longest cable would be 3 feet and while the alternator is 50 A, load is never above 10 A for more than a couple minutes and that's only the initial battery charge after a hard start.



Thank you,

Sebastien

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ronburnett(at)charter.net
Guest

Posted: Thu Jun 09, 2016 11:50 am Post subject: Size of battery cables

I used it for my RV-6A with Subaru and now going Lycoming



Ron Burnett



Sent from my iPhone



 	  Quote: 	
		    9, 2016, at 1:49 PM, Sebastien <cluros(at)gmail.com> wrote:

 

 Planning on moving my battery from the tail to the firewall. Current wiring is 2 gauge and so far all the homebuilders I have talked to say minimum 4 gauge but when I go on Aircraft Spruce the only battery cable they sell is 6 gauge. Does anyone use this stuff? I'm going to reuse the 2 gauge for the starter cable but has anyone used 6 gauge wire on a low current, short run install? Longest cable would be 3 feet and while the alternator is 50 A, load is never above 10 A for more than a couple minutes and that's only the initial battery charge after a hard start.

 

 Thank you,

 

 Sebastien

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ceengland7(at)gmail.com
Guest

Posted: Thu Jun 09, 2016 2:08 pm Post subject: Size of battery cables

On June 9, 2016 1:49:03 PM CDT, Sebastien <cluros(at)gmail.com> wrote:

 	  Quote: 	
		  Planning on moving my battery from the tail to the firewall. Current

wiring

is 2 gauge and so far all the homebuilders I have talked to say minimum

4

gauge but when I go on Aircraft Spruce the only battery cable they sell

is

6 gauge. Does anyone use this stuff? I'm going to reuse the 2 gauge for

the

starter cable but has anyone used 6 gauge wire on a low current, short

run

install? Longest cable would be 3 feet and while the alternator is 50

A,

load is never above 10 A for more than a couple minutes and that's only

the

initial battery charge after a hard start.



Thank you,



Sebastien

Conventional wisdom is to size the alt wire to handle max alt output, and protect the wire on the battery end. I'm using 4 for bat & starter; 8 for alt & runs to the buses. But a really short jump of 6 from bat to master contactor (inches, not feet) should be fine.
	




Charlie

-- 

Sent from my Android device with K-9 Mail. Please excuse my brevity.

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