New standards cut back system failure risks. In May 2004, Underwriters Laboratories (UL) revised UL 1971, regulating how operating currents are to be measured and how voltage ranges are to be listed and published. Historically, fire-alarm system designers used 24-volt current draw for computing voltage drops on audible and visible (AV) circuits. However, voltage drops [...]
Archive for the ‘ Design and Installation ’ Category
New guidelines include detailed specifications for alarm design and installation. The revised Americans with Disabilities Act Accessibility Guidelines (ADAAG), which harmonize the ADA guidelines with the National Fire Protection Association (NFPA) and American National Standards Institute (ANSI),were completed last year. The Access Board, an independent federal agency devoted to accessibility for people with disabilities, coordinated [...]
InnovairFlex provides a full range of accessories that expand the versatility and usability of InnovairFlex duct smoke detectors into a wide range of applications. This increased product flexibility enables distributors to reduce product SKUs and free up valuable shelf space. In addition, increased versatility and usability enable installers and technicians to save time and money on installation, testing and maintenance.