UL 924 is the safety listing standard for emergency lighting and power equipment. UL 924-listed bypass and transfer devices force designated fixtures to full brightness during a power loss regardless of control state, supporting NFPA 101's 90-minute egress requirement — including on low-voltage systems.
This page defuses the strongest objection to low-voltage lighting — 'what happens to egress when the network fails' — so that block belongs above the fold. The PoE egress answer is UL 924 bypass/transfer devices plus UPS-backed switches.
NFPA 101 (2024) requires monthly 30-second and annual 90-minute tests with records; listed self-testing systems may substitute.
We advise before we quote. Tell us what you are working on and we will tell you whether this applies to your project.
Plan egress compliance into your controls design
