What is a UL 924?
UL 924 is UL’s Standard for Safety of Emergency Lighting and Power Equipment. UL tests and certifies exit signs, emergency lights, and combo emergency exit signs to meet functionality, reliability, and visibility standards.
What is a UL1008 device?
UL1008 devices transfer the power from the normal circuit to the emergency circuit under loss of normal power. Under normal operation, the normal circuit powers the emergency fixtures. Once normal power is lost, the power feed transfers to the emergency circuit.
How does a UL924 relay work?
In automatic load control applications, when normal power is present, the ESR relay coil is activated and the emergency panel is fed from normal power. The lighting load can be switched on/off using an individual wall switch. When normal power drops out, the ESR coil is deactivated and N/C contact falls closed.
What is an emergency shunt relay?
Normally-closed electrically-held relay to be wired in parallel with a wall switch. Manually controlled emergency lighting will be automatically shunted on during a power outage.
What does an emergency lighting relay do?
The Emergency Lighting Circuit Transfer Relay (ELCTR) transfers a single lighting circuit from its normal power source to an emergency power source in the event of the loss of normal power or an external trigger (e.g., fire alarm).
What UL 1598?
The latest edition of ANSI/UL 1598 – the 4th Edition – was issued in September 2018. ANSI/UL 1598 is a national safety standard for lighting/luminaires for use within North America; it includes safety testing for temperature, shock, and reliable mounting methods, among other criteria.
What is a load control relay?
The Automatic Load Control Relay (ALCR) is a UL 924 listed device that is powered from an emergency source and provides power to emergency lighting load(s). The ALCR ensures a “lights on state” during loss of normal power while tracking the state of normal lighting loads during normal operation.
What is shunt in biology?
(shunt) In medicine, a passage that is made to allow blood or other fluid to move from one part of the body to another. For example, a surgeon may implant a tube to drain cerebrospinal fluid from the brain to the abdomen.
Does emergency lighting need to be hardwired?
If the electricity goes out, emergency lights must operate for a minimum of 90 minutes, according to the NFPA. In addition, the electrical supply must provide power within 10 seconds of the loss of normal power. Egress lighting must be “hardwired,” or served by the building’s primary electrical supply.
What UL 8800?
UL 8800 addresses potential human eye and skin exposure safety considerations associated with the light-source technology widely used in horticultural lighting systems. Tests are conducted in accordance with the requirements of IEC 62471 for Photobiological Safety of Lamps and Lamp Systems.