An alternator is a load sensing current-dependant charging device. It may
be rated at 65 amps, but that is only what the maximum charging rate
is. The alternator will only charge at a current high enough to match the
load put on it including recharging the battery back to normal. Since the
battery is the heaviest drain on the system (outside of headlights and any
other unintentional shorts to ground that Lucas built in), a heavier guage
wire (10 ga is good) from the alternator main terminal to the battery is
suitable. In such cases, the heavier, the better. If you plan on using
any high current devices like added on lights, high power stereo or
communications equipment, tap into the main cable and not rely on any of
the existing wiring to do more than what it was asked to do originally.
And as for that alternator, it goes by a lot of names- A127, 7127,
etc. The case is unique and immediately identifiable as it is used on so
many vehicles including GM, Vauxhall, International, Rover, and many other
autos and industrial equipment including earth movers, forklifts, etc.
-Vegaman Dan
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