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2. NEMA enclosure types - Wikipedia

   en.wikipedia.org/wiki/NEMA_enclosure_types

   Below is a list of NEMA enclosure types; these types are further defined in NEMA 250- Enclosures for Electrical Equipment. Each type specifies characteristics of an enclosure, but not, for example, a specific enclosure size. Note that higher numbers do not include the lower-numbered tests. For example, types 3, 4 and 6 are intended for outdoor ...

3. TEFC motor - Wikipedia

   en.wikipedia.org/wiki/TEFC_motor

   A Totally Enclosed, Fan-Cooled (TEFC) electric motor is a type of industrial electric motor with an enclosure that does not permit outside air to freely circulate through the interior of the motor. [1] An external fan blows outside air over the frame of the motor to cool it. This motor is arguably the most commonly used motor in ordinary ...

4. Dry running protection - Wikipedia

   en.wikipedia.org/wiki/Dry_running_protection

   Dry running protection, also known as dry-run protection or dry-running protection, is a type of protection mechanism to prevent a rotor, pump or stirrer shaft from operating without any medium added, as the bearing and shaft seal might be damaged if the motor is run while dry. [1]

5. Swimming pool sanitation - Wikipedia

   en.wikipedia.org/wiki/Swimming_pool_sanitation

   Two distinct and separate methods are employed in the sanitation of a swimming pool. The filtration system removes organic waste on a daily basis by using the sieve baskets inside the skimmer and circulation pump and the sand unit with a backwash facility for easy removal of organic waste from the water circulation.

6. GE BWR - Wikipedia

   en.wikipedia.org/wiki/GE_BWR

   Variable speed pumps were replaced with two-speed pumps (each rated at 35,400 US gallons per minute (2.23 m 3 /s) for a discharge pressure head of 865 feet (264 m)), and a flow control valve (adjustable from 22% open to 100% open with a linear flow response) was added to each loop for use in regulating recirculation flow (capable of regulating ...

7. Swimming pool - Wikipedia

   en.wikipedia.org/wiki/Swimming_pool

   A swimming pool, swimming bath, wading pool, paddling pool, or simply pool, is a structure designed to hold water to enable swimming or other leisure activities. Pools can be built into the ground (in-ground pools) or built above ground (as a freestanding construction or as part of a building or other larger structure), and may be found as a ...