Battery Voltage

March 7, 2014
The 2011 NEC provides nominal cell voltages for three types of battery chemistries.

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 noted above.

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