Tag

notification-appliances

• June 26, 2026 · 5 min read

  Sizing a NAC Circuit: Current Limits and Voltage Drop

  How to add up horn/strobe current draw, apply NAC de-rating, and know when voltage drop forces a circuit split or booster.

• June 23, 2026 · 5 min read

  Fire Alarm Candela and Strobe Spacing, Explained

  How to read the NFPA 72 candela tables for wall and ceiling strobes, pick the right cd rating for a real room, and avoid the sync gotcha.

• June 21, 2026 · 8 min read

  Fire Alarm Voltage Drop Calculation: The Real Numbers (and Why Most Submittals Show Zero)

  How the fire alarm voltage drop calc actually works, why the panel maker's form almost always shows zero, and when you really need real wire-run numbers.