Receptacles, electrical

Molding Powders. Urea-formaldehyde resins are compounded with alpha-cellulose cotton fiber reinforcement to produce molding powders (4 percent) for compression, transfer, and injection molding. Typical molding conditions are 127 to 182°C and 2000 to 8000 psi. They are superior to phenolics in white color, electrical resistance, and low cost, but are limited by moisture sensitivity (Table 3.13). They are used primarily in electrical wiring devices such as wall outlets, receptacles, electric blanket controls, circuit breakers, and knob handles. Smaller amounts are used in bottle caps, housewares, buttons, and sanitary ware. 

Electrical receptacles. Electrical services provided for fume hoods should be installed outside of the chamber to allow immediate access to the electrical plug, to prevent corrosion of the receptacle, and to avoid the possibility of fires caused by sparking or resistive heating of the fixture. 

Figure 17-27. Twical Class I, Division 1 and 2 receptacles and attachment plugs. (Top, courtesy of Crouse-Hinds Electrical Cor>struction Materials, a division of Cooper Industries, Inc. bottom, courtesy of Appleton Electric Co., a division of Emerson Electric Co.)...

These bombs can use twelve types of nose fuzes (of which several are VT and some are electrical) and four types of tail fuzes. For electric fuzing they are equipped with two conduits connecting the nose tail fuze cavities with a charging receptacle located between two suspension lugs... 

Plugs, Receptacles, and Connectors of the Pin and Sleeve Type for Hazardous Locations, National Electrical Manufacturer Association, Standard FB2000, 2000. 

It is also possible to distil fractions I, II and III below 185 °C in vapour (fraction la) or fractions I and II below 150 °C in vapour (fraction lb). Fractions I-IV self-flow or are sent by vacuum from receptacles 3 into collector 7, and fractions la and lb into collector 8. After the distillation is completed, the electric heating of the tank is switched off, the vacuum pump is stopped and tank 1 is filled with nitrogen (0.07 MPa). When the pressure in the system is atmospheric, the tank residue which boils above 250 °C (at 1.3-6.6 GPa) is sent by vacuum through cooler 4 into batch box... 

Vacuum distillation of the purified product of regrouping To prepare low-viscosity oligomethylphenylsiloxanes (4-12 mm2/s at 50 °C), the distillation is conducted in two stages. First, volatile fractions are distilled in tank 30, which is made of doped steel, fashioned with a sectional electric heating, coolers 21 and 24 and receptacles 22 and 25 to collect the distillate and tank residue. 

The tank is loaded with the purified product of regrouping from batch box 19. A residual pressure of 330-200 GPa is created in the system. The lower heating section is switched on, and volatile substances are distilled at 120 °C. The electric heating is switched off, and the contents of the apparatus are cooled to 50 °C at the same residual pressure. The residual pressure is vacuum-pumped to 2.6-4 GPa the volatile products are collected in receptacle 22 at a temperature up to 120 °C. Tank residue is cooled to 50-60 °C in cooler 24, loaded into receptacle 25 and then sent by vacuum into... 

After the methylphenylcyclosiloxanes have been loaded, a residual pressure of 3-13 GPa is created in tank 20, and electric heating is switched on. Decomposition is usually conducted at 300-350 °C. The products of decomposition (low-molecular cyclic substances) are collected in receptacle 23. After that the products enter distillation tank 24. A residual pressure of 3-13 GPa is created in the tank electric heating is switched on the light fractions are distilled at 240-260 °C and collected in receptacle 27. The distillation of the light fractions can be monitored by the refraction index the distillation is stopped at nD20 = 1.53 5 0+1.5360. 

The CR product is sent from collector 14 into loader-unloader 15 and then into apparatus 16 the condenser cover is filled with water and the whole system is vacuumised until the residual pressure is below 1.3 GPa. The low-boiling fractions below the vapour temperature of 220-235 °C (depending on the brand of the liquid) are collected in receptacle 17. After the fraction has been separated, the distillation is stopped by turning off the electric heating of apparatus 16. Tank residue, which is the target product, IIMTC-1, IIMTC-2 or IIMTC-3 liquid, is cooled in the tank of the apparatus down to 100 °C in a vacuum of 1.3-2.6 GPa and then loaded into receptacle 15. 

There is only one way in which electricity can be stored and then instantly obtained by closing a switch. In this respect, the electrochemical electricity storer, a battery, has no rival, and fuel cells in particular do not threaten batteries, for they have a different purpose—to create electricity from chemicals held in receptacles near the cell. 

Bonding difficult-to-clamp fixtures such as surface mounting electrical receptacles, brackets, and racks to masonry walls... 

The largest use is for binding fibrous and granulated wood into indoor composition board. Smaller uses are for wet-strength paper and permanent-crease textiles. About 4 percent of urea-formaldehyde resin is combined with alpha-cellulose to make molding powders (Table 15.18). These find use mainly in electrical parts such as switches, wall plates and receptacles, circuit breakers, electric blankets, handles and knobs. 

As a manufacturing technology, selective metallization of a molded plastic substrate has wide utility in electrical and electronic componentry, connector and receptacle devices, customized IC carriers, electro-mechanical and electro-optical products. "The major benefits which come from a molded circuit board may be grouped under four headings including structural/mechanical, material, cost and design/aesthetics. 

CAMAC is an international standard for modular computer instrumentation. It specifies the electrical, mechanical, and functional characteristics of modular instruments to be plugged into a standard multi-receptacle "crate" which, in turn, can be interfaced to a minicomputer. The unique feature of CAMAC systems, as opposed to other modular systems, is that the modules not only get power from the crate but the "data-way" between the modules and the crate "controller" can carry 24-bits of data in each direction in addition to various function, address, and flag signals. The controller resides in the crate as a module and acts as an interface between the modules and a specific computer. Some of the lines in the dataway are location-specific so that a module in a given slot can be addressed by the controller. The modules (except for the controller) cannot communicate with other modules except through the controller. 

Wet or damp environments Water can be a good conductor of electricity, hence working with electrical equipment in a wet environment can be a hazardous activity. Electrical equipment should be isolated from moisture. Electrical receptacles in wet or damp environments must be designed for this type of environment, with ground-fault-circuit-interrupter (GFCI) protection. This type of receptacle should be tested periodically in accordance with the manufacturer s recommendations. 

Circuit overload Electrical equipment should not be utilized in a manner not intended by its manufacturer. Overloaded wiring and receptacles can damage the equipment and result in electrical shock, electrocution, and fire. Equipment installers and users should always understand the intended use of the equipment and follow manufacturer s recommendations. 

Hot wire- The wire that carries electrical energy to a receptacle or other device—in contrast to a neutral, which carries electricity away again. Normally the black wire. Also see ground. 

Receptacle- An electrical outlet. A typical household will have many 120 volt receptacles for plugging in lams and appliances and 240 volt receptacles for the range, clothes dryer, air conditioners, etc. 

System power is provided via a cable cormected to a 575 V three-phase source. A series of 12 receptacles located every 4 rows along the cellhouse allow a flexible umbilical cable connected to the machine to be limited to a 100-foot length. A 50KVA isolation transformer, surge and ground fault protection are used to condition the power and electrically isolate the... 

The National Hectrical Code (NEC) covers the safe and proper installation of wiring, electrical devices, and equipment in private and public biuldings. NEC is published by the National Fire Protection Association (NFPA) every three years. As an example of an NEC provision, the receptacle oudets in a room in a dwelling should be placed such that no point on the wall space is more than 6 ft away from the outlet in order to minimize the use of extension cords. After performing a Web search or obtainii a copy of the NEC handbook, give at least three other... 

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