- 업종: Fire safety
- Number of terms: 98780
- Number of blossaries: 0
- Company Profile:
Established in 1896, NFPA's mission is to reduce the worldwide burden of fire and other hazards on the quality of life by providing and advocating consensus codes and standards, research, training, and education.
Not capable of being exposed for inspection, maintenance, or repair without damage to the chimney or building structure or finish, or without the use of special tools.
Industry:Fire safety
Not all frequencies that occur on an electrical power system are integer multiples of the fundamental frequency (usually 60 Hz), as are harmonics. Some loads draw currents that result in voltages that are between harmonic frequencies or less than the fundamental frequency. These frequencies are referred to as interharmonics and can be made of discrete frequencies or as a wide-band spectrum. A special category of these interharmonics is called subharmonics, in which the frequencies involved are less than the fundamental power line frequency.
Industry:Fire safety
Nonstructural partitions used to subdivide compartments, such as bulkhead panels, doors, windows, insulation, ceilings, connectors, and interior finishes.
Industry:Fire safety
Nonprofessional projectors are those types other than as described in 540. 2.
Industry:Fire safety
Nonload-bearing partition-type envelope system installed around electrical components and cabling that have withstood a fire exposure as established in accordance with an approved test procedure and are rated by a test laboratory in hours of fire resistance and are used to maintain specified nuclear safety functions free of fire damage.
Industry:Fire safety
Nonliquefied gases that are dissolved in a solvent.
Industry:Fire safety
Nonfabric components of protective clothing or equipment including, but not limited to, those made of metal or plastic.
Industry:Fire safety
