PPRuNe Forums - View Single Post - Why do A330 and other types have an APU battery?
Old 21st Jul 2012, 14:42
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grounded27
 
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Weight savings, placing the a/c battery close to the cockpit and the APU battery close to the APU eliminates lots of heavy gauge wire. The longer the distance the larger gauge wire required for the desired current draw.

If Airbus could use 26 gauge wire for everything they would.
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