Practice question

What is the correct method for calculating voltage drop on a fire alarm NAC?

  1. No calculation needed
  2. V = I x R, using total circuit resistance based on wire gauge, length, and device current
  3. Add 10% to panel voltage
  4. Only matters for circuits over 1,000 feet

Answer: B — V = I x R, using total circuit resistance based on wire gauge, length, and device current

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