Battery Cable Sizing - PD9260
After working on friends trailer last week, one item that was not addressed was the size of the battery cabling, which I believe was a 6AWG (maybe an 8AWG, not sure) for his 2001 trailer, a 26 ft mode...
Forum Discussion
Ron, if you use the frame for ground connection part of the wire run, you can lower the total feet in the equation for calculating wire size. The frame will have very low resistance.
If you have a fifteen ft. run, 60 amps at 14.5v w 4 awg voltage drop is 3% or .45V, with 20 amps at 14.5v using 4awg drop is 1% or .15v.
The 2awg double run is: at 60 amps, 14.5v- 1% .14v, 20 amps at 14.5 .32% .047v drop.
Here is the calculator if you want to play around with different conductor sizes.
If you have a fifteen ft. run, 60 amps at 14.5v w 4 awg voltage drop is 3% or .45V, with 20 amps at 14.5v using 4awg drop is 1% or .15v.
The 2awg double run is: at 60 amps, 14.5v- 1% .14v, 20 amps at 14.5 .32% .047v drop.
Here is the calculator if you want to play around with different conductor sizes.
