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Learn about the standards, regulations, and terminology for electrical equipment in places where fire or explosion hazards may exist. Zone 1 is an area where ignitable concentrations of flammable gases, vapors or liquids are likely to exist under normal operating conditions.
Learn how model rocket motors are classified by total impulse into letter-designated ranges, from ⅛ A to O. Find out the specifications, codes, and examples of each class, including G class motors that have 80.01 to 160 newton-seconds of impulse.
Learn about the allowable temperature range of devices and systems, and how it affects their performance and reliability. Find out the factors, grades, standards and examples of operating temperature for different applications and contexts.
Learn about the standards and ratings of electrical enclosures used in North America, defined by the National Electrical Manufacturers Association (NEMA). Find out the characteristics, environmental conditions, and applications of each NEMA enclosure type.
Learn about the different classes of electrical insulation system for wires and appliances, based on temperature and shock protection. Find out the typical materials and standards for each class, and how they are related to the hot-spot temperature and thermal endurance.
The General Electric F414 is an American afterburning turbofan engine in the 22,000-pound (98 kN) thrust class produced by GE Aerospace (formerly GE Aviation). The F414 originated from GE's widely used F404 turbofan, enlarged and improved for use in the Boeing F/A-18E/F Super Hornet.
Learn how a rotary phase converter (RPC) converts single-phase power to three-phase power using a rotating motor or generator. Find out the history, types, operation, and applications of RPCs.
A thermocouple is an electrical device that produces a voltage proportional to temperature difference between two dissimilar conductors. Learn about the Seebeck effect, the characteristic function, the reference junction, and the types and applications of thermocouples in science and industry.