When the button is activated, which buses remain powered by the batteries?

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Study for the ERJ-145 Electrical Test. Gain knowledge with quizzes featuring flashcards and multiple choice questions, complete with hints and explanations. Prepare confidently for your exam!

Multiple Choice

When the button is activated, which buses remain powered by the batteries?

Explanation:
Activating this control tells the electrical system to shed nonessential loads and devote the battery energy to the critical circuits. Only the essential DC bus remains powered by the batteries, keeping necessary flight controls, instruments, and communications alive. Nonessential buses are deenergized to conserve energy. External power can still supply loads when connected, but the battery itself stays focused on the essential buses.

Activating this control tells the electrical system to shed nonessential loads and devote the battery energy to the critical circuits. Only the essential DC bus remains powered by the batteries, keeping necessary flight controls, instruments, and communications alive. Nonessential buses are deenergized to conserve energy. External power can still supply loads when connected, but the battery itself stays focused on the essential buses.

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