[Healeys] (no subject)alternator

bighealey at charter.net bighealey at charter.net
Wed Aug 20 12:14:58 MDT 2008


Eric,

I can disconnect my battery and my car will run.  Which is a poor man's field test for determining if the alternator is charging.  So yes the alternator does supply the system.

My assumptions were that with an alternator, stock wiring and battery, new dedicated wiring for extra accessories ( all in good working order) the stock wiring would handle reasonable extra current in the charging system.

I did not account for the excptional case where faults prexist (battery short) or ridiculous loads (teenage sized triple audio amps and subwoofers) <grin> are introduced.

I am running a delco and extra lights and CB (each with aftermarket new decicated wiring) and all is good.  I do need to add a fuse to the fragile and well know red read lights wire.  That goes for generator or alternator tho.

Cheers!
---- "Brits'n'Pieces (Eric Frenken)" <lists at brits-n-pieces.com> wrote: 
> John, I don't know what you mean. Maybe because English is not my native
> tongue.
> 
> All electrical consumers in a car are fed by the battery. I've seen no
> consumer fed by the alternator directly. Of course the battery is fed by the
> alternator, so the alternator feeds all consumers indirectly via the
> battery. I'm not sure about modern cars, but I know for quite sure that this
> is the way the electrical charging system works in our AHs.
> 
> As you say, if you replace the original cable between alternator and battery
> (after upgrading to a 50 amp alternator) with a 50 amp cable, everything is
> fine. Maybe this is what you said and I didn't get it right. At least this
> is what I wanted to say.
> 
> Best regards
> 
> Eric
>  
> 
> I wonder if we are missing a point here. On a modern car the output from the
> alternator not only charges the battery when this is necessary but also
> drives all sorts of other electric equipment such as power steering, heated
> seats, fast warm up heater, entertainment units etc.
> 
> As you say a C45 or C42 has limited output but if an alternator is
> substituted and extra lights are fitted it will be able to supply the light
> AND charge the battery at a good rate if it is low. In this case a thicker
> wire from the alternator is advisable. A 50 amp alternator and a 50 amp wire
> should be adequate for one of our cars because it would feed all the
> equipment  and charge the battery at the maximum permissible rate if this
> were in a low state,
> 
> Regards
> 
> --
> John Harper
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