Q. Nominal battery voltage is typically _____. a) 2V per cell for lead-acid systems b) 1.2V per cell for alkali systems c) 4V per cell for lithium-ion systems d) all of the above See answer and applicable Code reference The correct answer is: d) all of the above You can find the definition of "nominal battery voltage" in Sec. 480.2 of the 2011 NEC. The Informational Note in this section notes the most common nominal cell voltages for the three types of battery chemistries ...

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