Code Applied by the app elec.egress.illumination
Means of egress illumination on emergency power
The building code's side of the exit lights: the path out stays lit on emergency power for 90 minutes when the normal power fails.
| When | The app uses |
|---|---|
| egress path lighting on emergency power, light with the power out | 90 min |
- Source
- IBC · 1008.3.4 · read the public text
- Editions checked
- 2018 · 2021
- Used by
- Courses
- Amendments
No state or local amendment to this rule is on file. Not on file means the model code as written — check your jurisdiction.
A model code the authority having jurisdiction adopts.
The building code decides that the way out of a restaurant must stay lit when the power fails, and for how long: the aisles, the corridors and the exits, on an emergency source, for 90 minutes. The electrical code then says how that source is built (NEC 700.12, its own rule).
On a bid it is the reason the emergency fixtures are on the plan at all, and the reason an architect's egress plan can add some the electrical sheets left off.
What the app does with it
The electrical course teaches it on a card (Chapter 3, Which rooms switch themselves off?), and check-lesson-rules holds the card's numbers to this rule. The app counts the fixtures you mark; it does not check an egress path's lighting.
Verify against your edition
Section 1008.3 says which rooms and buildings need emergency egress lighting (1008.3.1 to 1008.3.3); the 90 minutes is 1008.3.4, Duration, by storage batteries, unit equipment or an on-site generator; 1008.3.5 sets the illumination the path keeps on emergency power. The 2021 numbering was read in a state adoption of the 2021 IBC; the 2018 numbering rests on search-result text. Exit signs carry their own 90 minutes in 1013. Local amendments still govern.
Settled 2026-09-27 by Claude on the owner's delegation, from the dossier's research and the model code text; not checked against a printed book or a local amendment.
Cited by section, not reprinted: the code text belongs to its publisher. Company practice is not a rule here — it lives with your pricing.