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The Underwriters Laboratories' UL 294 is a safety standard that addresses the construction, performance, and operation of access control systems intended to regulate or control entry into and exit from secured areas. These systems can also restrict access to certain devices through electrical, electronic, or mechanical means.
Coded panels were the earliest type of central fire alarm control, and were made during the 1800s to the 1970s. A coded panel is similar in many ways to a modern conventional panel (described below), except each zone was connected to its own code wheel, which, depending on the way the panel was set up, would either do sets of four rounds of code until the initiating pull station was reset ...
A control panel is a flat, often vertical, area where control or monitoring instruments are displayed or it is an enclosed unit that is the part of a system [1] that users can access, such as the control panel of a security system (also called control unit).
Control panels and power supply EN 54-2 Part 2: Control and indicating equipment (Fire alarm control panel) 1997 + A1:2006 + AC:1999 Yes Alarm devices EN 54-3 Part 3: Fire alarm devices - Sounders 2014 + A1:2019 Yes Control panels and power supply EN 54-4 Part 4: Power supply equipment 1997 + A1:2002 + A2:2006 + AC:1999 Yes Detectors EN 54-5
The NEC is developed by NFPA's Committee on the National Electrical Code, which consists of twenty code-making panels and a technical correlating committee. Work on the NEC is sponsored by the National Fire Protection Association. The NEC is approved as an American national standard by the American National Standards Institute (ANSI). It is ...
After the 1979 sale of Federal Pacific Electric to Reliance Electric, a unit of Exxon Corporation, Reliance reported to the U.S. Consumer Product Safety Commission that the Stab-Lok breakers and panels did not meet the requirements published by Underwriters Laboratories, even though the products bore UL labels. The CPSC performed its own ...
Control panel (engineering), a flat, often vertical, area where control instrumentation is mounted; Control panel (software), the tool in the operating system which allows most or all of the settings to be changed through a user interface Control Panel (Windows) System Preferences, a computer program in the macOS operating system; Web hosting ...
Historically, most classes of technical documentation lacked universal conformity for format, content and structure. Standards are being developed to redress this through bodies such as the International Organization for Standardization(ISO), which has published standards relating to rules for preparation of user guides, manuals, product specifications, etc. for technical product documentation.