Legacy

A term typically used to describe electrical panels outside of electrical equipment rooms

Reliability is a percentage value representing the probability that a piece of equipment or system will be operable throughout its mission duration. Values of 99.9 percent (three 9s) and higher are common in data and communications equipment areas. For individual components, the reliability is often determined through testing. For assemblies and systems, reliability is often the result of a mathematical evaluation based on the reliability of individual components and any redundancy or diversity that may be employed

A percentage value representing the probability that a piece of equipment or system will be operable throughout its mission duration. Values of 99.9% (three 9s) and higher are common in data and communications equipment areas. For individual components, the reliability is often determined through testing. For assemblies and systems, reliability is often the result of a mathematical evaluation based on the reliability of individual components and any redundancy or diversity that may be employed

A particular fire alarm control panel whose specific purpose is to monitor fire detection devices in a given area protected by a suppression system and, upon receiving alarm signals from those devices, actuate the suppression system

* Ratio of the partial pressure or density of water vapor to the saturation pressure or density, respectively, at the same dry-bulb temperature and barometric pressure of the ambient air * Ratio of the mole fraction of water vapor to the mole fraction of water vapor saturated at the same temperature and barometric pressure at 100% relative humidity, the dry-bulb, wet-bulb, and dew-point temperatures are equal

In a refrigerating system, the medium of heat transfer that picks up heat by evaporating at a low temperature and pressure and gives up heat on condensing at a higher temperature and pressure

The amount of time that a particular benchmark took to run on a specific reference platform

"N" represents the number of pieces to satisfy the normal conditions. Redundancy is often expressed compared to the baseline of "N." Some examples are "N+1," "N+2," "2N," and 2(N+1). A critical decision is whether "N" should represent just normal conditions or whether "N" includes full capacity during off-line routine maintenance. Facility redundancy can apply to an entire site (backup site), systems, or components. IT redundancy can apply to hardware and software

Room-cooling class

The supply voltage range as declared by the manufacturer