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Old 5th Sep 2013, 10:47
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rudderrudderrat
 
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Hi BOAC,
Thanks for the reference; From http://www.smartcockpit.com/download...-Electrical...

You are correct.
"Hot Battery Bus.
Prior to establishing electrical power, the main battery supplies the hot battery bus. After establishing electrical power, the main battery charger powers the hot battery bus."

I was confusing the battery bus which can be powered by the Left DC system via the TRUs.
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