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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 7. Electrical equipment of special installations

Electrical installations in fire hazardous areas. Application area

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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7.4.1. This chapter of the Rules applies to electrical installations located in fire hazardous areas indoors and outdoors. These electrical installations must also meet the requirements of other sections of the Rules to the extent that they are not changed by this chapter.

The selection and installation of electrical equipment (machines, apparatus, devices) and networks for fire hazardous areas are carried out in accordance with this chapter of the Rules based on the classification of combustible materials (liquids, dusts and fibers).

Requirements for electrical installations of residential and public buildings are given in Ch. 7.1, and to the electrical installations of entertainment enterprises, clubs and sports facilities - in Ch. 7.2.

See other articles Section Rules for the installation of electrical installations (PUE).

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The Crew Dragon spacecraft, developed by Elon Musk's SpaceX to deliver and return astronaut crews to the International Space Station (ISS), has successfully splashed down in the Atlantic Ocean after the first Demo-1 test mission. The return and splashdown could be seen on the NASA broadcast.

Crew Dragon undocked from the ISS, after a six-hour flight entered the atmosphere and, braking with the help of four parachutes, splashed down in the Atlantic Ocean about 400 kilometers east of Cape Canaveral.

The first-ever test launch of Crew Dragon took place on March 2 from the Kennedy Space Center in Florida, the next day the ship successfully docked to the ISS. It was a test flight without astronauts. On board the ship was only a humanoid mannequin, nicknamed Ripley.

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The current contract with NASA requires SpaceX to use a new Crew Dragon capsule every time. At the same time, NASA's contract with Boeing allows you to use the same Starliner ship again. Perhaps in the future, NASA will allow SpaceX to reuse the Crew Dragon, as it did with the cargo version of the Dragon.

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