1. What is the MS-5UD Battery Calculator?

The Fire Lite MS-5UD Battery Calculator helps determine the required battery capacity (in amp-hours) for your Fire Lite alarm system based on the electrical load and desired backup time.

2. How Does the Calculator Work?

The calculator uses a simple formula:

Where:

• \( Load \) — Total current draw of the system in amps
• \( Time \) — Desired backup time in hours

Explanation: This calculation gives you the minimum battery capacity needed to power your system for the specified duration.

3. Importance of Proper Battery Sizing

Details: Correct battery sizing ensures your fire alarm system will operate during power outages for the required duration (typically 24 hours plus 5 minutes of alarm).

4. Using the Calculator

Tips: Enter the total system load in amps and desired backup time in hours. All values must be valid (load > 0, time > 0).

5. Frequently Asked Questions (FAQ)

Q1: Where can I find the system load?
A: The system load can be found in your panel's documentation or by measuring the current draw with an ammeter.

Q2: What's the typical backup time required?
A: NFPA requires 24 hours of standby plus 5 minutes of alarm, but local codes may vary.

Q3: Should I add a safety factor?
A: Yes, it's recommended to add 20% to the calculated capacity to account for battery aging and temperature effects.

Q4: Can this calculator be used for other Fire Lite panels?
A: The basic calculation works for any panel, but consult specific documentation for exact requirements.

Q5: Where can I buy MS-5UD batteries?
A: These batteries are available at Home Depot and other electrical supply stores.