NFPA 70B is the national standard for electrical equipment maintenance—and that includes your exit signs and emergency lights. While NFPA 70 focuses on installation safety, 70B ensures these critical systems continue to perform over time. This guide highlights what you need to do to stay compliant.
View the Full U.S. State-by-State Fire Code Guide📘 What Is NFPA 70B?
NFPA 70B, titled Recommended Practice for Electrical Equipment Maintenance, provides best practices for maintaining electrical safety equipment—including emergency lighting. It's used by facilities teams, inspectors, and safety professionals to ensure reliability and reduce fire and shock hazards.
While not always legally binding, 70B is increasingly being adopted by AHJs (Authorities Having Jurisdiction), especially in high-risk or mission-critical facilities.
⚠️ Why NFPA 70B Matters for Emergency Lights
Exit signs and emergency lights often sit idle for years—until the moment they're needed. NFPA 70B ensures:
- Battery backup systems remain functional
- Bulbs and LEDs are tested and replaced before failure
- Inspections catch degradation from water, corrosion, or tampering
- Testing logs are available for insurance or AHJ review
Think of 70B as preventative care—it keeps your system reliable so it doesn’t fail in an emergency.
🧪 Testing Requirements
NFPA 70B recommends the following minimum testing schedule:
- Monthly: 30-second functional test of battery-powered units
- Annually: 90-minute full battery discharge test (as per UL 924)
- After installation: Full functional check to confirm compliance
Most fixtures include a test button to simplify monthly checks. If you're using a central inverter or generator, conduct system-wide tests per manufacturer guidelines.
🛠️ General Maintenance Tasks
- Check indicator lights and charging status
- Inspect lens clarity and fixture alignment
- Wipe away dust, insects, or debris blocking visibility
- Replace failing bulbs or degraded LEDs
- Verify installation labels remain legible
Record all maintenance activities and test results in a log that’s accessible for future inspections.
📋 Documentation Best Practices
- Use a maintenance log or spreadsheet with date, test type, result, and technician initials
- Label each fixture for easy reference in testing records
- Include battery replacement dates (most last 3–5 years)
Well-kept records can speed up audits and help prove due diligence in the event of an incident.
❌ Common 70B Compliance Mistakes
- Skipping monthly functional tests
- Assuming LEDs never need checking
- Ignoring corrosion or cracked housings
- Not tracking battery life or expiration
Even if a sign is glowing, the battery might not be charged. Test to confirm.
❓ NFPA 70B FAQ for Exit Signs
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Is NFPA 70B a code or guideline?
It's a recommended practice, but increasingly adopted into enforceable maintenance protocols. -
What if my exit signs are in hard-to-reach areas?
Use a testing pole or schedule lift access—neglect isn’t an excuse. -
Can I use self-testing fixtures?
Yes, many UL 924 products include built-in diagnostics. Still record test outcomes.
📚 Helpful Resources
🧠 Final Thoughts
NFPA 70B helps bridge the gap between code-compliant installation and long-term reliability. By following its maintenance standards, you keep your exit signs and emergency lights ready—every day, every shift, and every emergency.