Spark.Field reference guide
SOURCE-BOUND RESEARCH / BETA
FIRE & LIFE SAFETY / SOURCE RESEARCH

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NFPA 24 · 25 · 72 · 80 · 291 / OSHA

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OR WORK THE SYNTHETIC BATTERY EXAMPLE

Sources have different scopes. The beta calculator below uses a synthetic fire alarm example; check the cited page and project conditions before applying any result.

WORKED CALCULATION

Check the numbers.

A synthetic battery-capacity example from NFPA 72 (2019). Change the currents to see each step; this does not select a battery for a project.

FIRE ALARM / SYNTHETIC PROTECTED-PREMISES EXAMPLE

This example uses 24 hours in standby, 5 minutes in alarm, and a 20% margin. Other system types can have different requirements.