Security and fire alarm systems are designed for operation within specified current and voltage ratings. If these ratings are exceeded due to short-circuit or voltage transients, components may ...

Electrical system designers have at their disposal several types of fire resistive systems that comply with specific Code requirements. It can be helpful to ...

With the increase in popularity of low-voltage technology, electrical systems are more susceptible to transient damage and malfunction, and system designers need to put more thought into surge ...

Normally, the fire alarm initiating device, notification appliance and signaling line circuits are not run outside the building. When we have no choice but to run them overhead or underground, ...

ALARM systems, as the name implies, provide an alarm or warning that a problem exists. They may be signaling systems only, which require manual activation, or the more common variety that combines ...

SALT LAKE CITY—Alder, formerly Alarm Protection Technology or APT, recently prevailed in a legal battle with ADT, which had alleged that Alarm Protection Technology engaged in trademark infringement ...

Circuit breakers now sport advanced features that include remote control and operational status reporting. Engineers have long considered circuit protection a stable if somewhat unglamorous area.

I continue to be surprised by how many equipment designers are confused by UL circuit protection standards. In trying to meet conflicting standards, engineers may actually decrease the level of ...

CHICAGO (CN) - An Illinois fire-protection district cannot monopolize the production of alarms that it requires for certain buildings, the 7th Circuit ruled. In 2009, the Lisle-Woodridge Fire ...