Sorry to prolong this
but I wanted to understand why 8 B&S gauge cable is apparently too thin for this application.
Surely it's dependent on practical requirements which in turn influence the design parameters.
I used 8 B&S for general charging of a second battery: it was more than satisfactory. For a 5m run carrying a max of 15 amps, the difference in voltage drop between a 6 B&S and 8 B&S was a theoretical 0.063V (0.094V for 6 B&S and 0.16V for 8 B&S). In the scheme of things for charging a battery this difference is " in the noise".
In line with this, I wondered why virtually all mains powered battery chargers (including my good mate's expensive CTek collection!) have charging leads of approx 2m of seemingly 3-4mm cable which has about 10 times the resistance of 6 B&S!
So with due respect to all the practical knowledge in these contributions, perhaps 6 B&S isn't necessary as a one size fits all approach. Surely as long as the gauge of cable used ( in this case 8 B&S) is "fit for purpose" ...which I believe has been demonstrated, then why the angst?
Maybe I'm missing something...
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