Emergency lighting testing: the monthly and annual tests NFPA 101 asks for
The 30 second monthly test, the 90 minute annual, and why a wall of self testing units still needs somebody to look at it.
Emergency lighting has to keep working for a set time after normal power fails, not just come on. Pressing the test button proves the lamp lights. It does not prove the battery carries the load for the full duration, which is the actual requirement. NFPA 101 Chapter 7 covers both how long it has to run and how it is tested.
What it has to do
The requirement is a light level along the path of egress, measured at floor level, not a count of fixtures. It runs for at least 1.5 hours, and the level is allowed to decay over that time. There is also a uniformity limit, a maximum of 40 to 1 between the brightest and darkest points, that most people never check. A corridor can meet the average and the minimum and still fail on a bright pool under one fitting next to a dark stretch.
Where the lighting depends on switching to another power source, a delay of up to 10 seconds is permitted.
The manual test regime
NFPA 101 allows four testing regimes, not one. The manual one is:
- Monthly: a functional test for at least 30 seconds, with at least 3 weeks and no more than 5 weeks between tests.
- Annually: a test for the full 1.5 hours where the system runs on batteries.
The equipment has to stay fully working for the length of both tests.
From the field
The 3 to 5 week window is the part that gets missed. Testing on the first of every month is compliant. Testing whenever somebody remembers is not. The interval goes past 30 days only with AHJ approval.
Self testing units do not remove the work
Self testing and self diagnostic units are one of the permitted regimes. The unit tests itself for at least 30 seconds, with a diagnostic routine, at least every 30 days, and shows a failure on its status indicator. On top of that:
- A person still looks at every unit at intervals of no more than 30 days.
- The annual 1.5 hour test still happens.
- Written records are still kept.
A computer based system can run the annual test on its own, but it has to be able to produce the history of tests and failures at any time.
From the field
Self testing replaces the monthly button press. It does not replace the monthly look or the annual full duration test. A wall of red indicators nobody checks is not a testing program.
Records
Written records of the inspections and tests are kept by the owner, for the AHJ.
Is it required in the first place?
That comes from the occupancy chapters, plus a short list of specific triggers: underground and limited access structures, high rise buildings, doors with delayed egress locks, the stair shafts and vestibules of smokeproof enclosures, and new sensor release electrical locking. Where it is required, the extent is defined. The exit discharge outside the door is the piece most often left dark, and it is expressly included.
Keep reading
Spot smoke detector spacing and placement: the NFPA 72 basics
A 30 foot grid is where layout starts, not where it ends. The rules that decide whether a corner, a partitioned office or a hidden detector is covered.
Fire extinguisher inspections: the owner's monthly look and the service visit
The monthly check is the owner's job, and it is the one most often not happening at all. What NFPA 10 asks for, from placement to hydro.
Secondary power and standby batteries: what NFPA 72 asks of them
24 hours quiet, then the alarm. Why the battery calculation matters more than a load test, and why an undated battery is the installer's problem.
What goes in a fire alarm drawing package: the NFPA 72 minimum
Floor plans, risers, calcs and the sequence of operation. What Chapter 7 expects on every system, and where it has to live once the job is done.