Re: Re[4]: WOT accessory cutoff switch

["Igor Strashny" <igor@msrbsgi1.mc.duke.edu>]

Yes you can ground the excitation wire to kill the load
  instantly without damaging the alternator however if your electrical system
is in good shape i.e. your battery is charged, alternator consumes negligible
amount of power from the engine.

A/C compressor deprives your engine of 5-7kW which is about 5-10% of the engine
output depending on rpm.




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