Crimping Battery Cable Lugs - Page 2 - Fiberglass RV


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Old 09-27-2010, 11:00 PM   #15
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Name: Byron
Trailer: 2006 Scamp 13' towed with a 2005 Dodge Dakota 4.7l Magnum W/full tow package (over kill)
Oregon
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Originally Posted by Carl G View Post
My error - I am using 4 AWG wire, not 4/0. Sorry for the confusion. This is the minimum gauge I need to avoid problems with voltage drop between the converter/charger and the battery.

I would suggest that you really look at voltage drops vs length vs wire size. The difference between 4 AWG and 10 or 12 AWG I doubt is worth the difference in cost.

I just made the calculations for you 4 AWG with 10' wire you'll drop about 50 milivolts. 12 AWG about 300 milivolts. With 10 AWG it about 100 milivolts.
Not worth the additional cost. That's assuming a 20 amp current flow. I doubt you ever get more than 4 amps flowing between the converter and the battery so you can divide those number by 5 to a more realistic voltage drop.

Absolutely nothing in your trailer is that sensitive to voltage drops.

Byron
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