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Electrical

Electrical October 1, 2000

Optical-fiber network saddles

Optical-fiber network saddles for use in routing fiber-optic cable are designed with rounded edges to provide a smooth surface between the mount and the cable. This helps prevent potential stress on the cable and damage to insulation resulting from snagging or abrasion. Saddles are available in single-capacity versions for a maximum bundle size of 1.

By Staff
Electrical October 1, 2000

Protecting Data-Processing Facilities

Prior to the implementation of the Montreal Protocol, Halon was the fire-suppression system of choice for computer and data-processing facilities throughout the United States.

By Consulting Specifying Engineer Staff
Electrical October 1, 2000

AC adjustable-frequency drives

AC adjustable-frequency drives save up to 40 percent of fan-motor energy compared to standard fixed-airflow systems. In cooling-tower applications, drives reduce fan noise and eliminate fan cycling as well as the need for output-water throttling valves, while maintaining water at design temperatures.

By Staff
Electrical October 1, 2000

Plumbing the Depths—of ADA and Low-Flow

A panel of noted plumbing engineers and designers discuss major issues in commercial plumbing: code revisions, compliance with the Americans with Disabilities Act (ADA), toilet parity and low-flush technology. Finally, they define what they feel are the major issues in commercial plumbing today in this month's M/E Roundtable.

By SCOTT SIDDENS, Senior Editor
Electrical October 1, 2000

Underfloor System Reveals Hidden Key to Success

As the owner of Printing Concepts, a commercial print shop in Stow, Ohio, Ron Taggart has seen a lot of changes in his industry—particularly a greater dependence on computers and telecommunications equipment. When Taggart decided to build a new 24,000-square-foot facility for his operation, one of his top priorities was making the facility flexible for new technology and future growth.

By Staff
Electrical October 1, 2000

Moving Harmonics out of Harm’s Way

Are harmonics refusing to jibe with the harmony of a facility's power flow?In the old days of predominantly linear loads, harmonics were a natural occurrence that didn't cause problems because with normally balanced, three-phase AC systems that have nondistorted waveforms, the harmonic currents got cancelled out.

By BARBARA HORWITZ, Associate Editor
Electrical October 1, 2000

A Smattering of Sprinklers

Fire-suppression systems, like most building systems, components and construction materials, continue to take advantage of technological advancements—innovations that improve system performance, expand applications and result in cost savings or additional flexibility for building owners and users.

By MICHAEL J. MADDEN, P.E., Principal, Gage Babcock Associates, La Palma, Calif.
Electrical October 1, 2000

Industrial lighting fixture

Industrial lighting fixture offers optimal performance with T8 lamps and high-light-output ballasts. Precise herringbone slots run the length of the fixture body to provide 170 degrees of even distribution above the fixture at 92-percent energy efficiency and 90-percent light output below the fixture.

By Staff
Electrical October 1, 2000

Uninterruptible power supply – 2000-10-01

Uninterruptible power supply (UPS) is online, double-conversion type in 3 kVA and 5 kVA sizes that offer accurate, high-frequency IGBT digitized power. UPS offers a battery-management system that automatically determines charge and discharge rates, maximizing run times and battery life.

By Staff
Electrical October 1, 2000

Radiant floor-heating pump

Radiant floor-heating pump improves control and energy use in primary- and secondary-piping configurations.

By Staff