Electrical cords

DuPont—Dow is the primary suppHer of these polymers. There is an estimated 18,000 t of these elastomers used per year. The main uses of CPE are in constmction, automotive, and electrical appHcations. These include power steering hose, electrical cords used in low voltage appHcations (extension cords, ignition wire), pond liners, and as a plastic modifier to improve impact modification. 

Wear of medical devices and biomaterials can affect quality of life. Wear of tooth fillings, artificial joints and heart valves can be inconvenient, costly (more frequent replacement) or even life-threateiiiiig (premature breakdowns). Wear of components can also cause accidents. Worn brakes and tires can cause automobile accidents, worn electrical cords can result in electrocution and fires and worn out seals can lead to radiation leaks at nuclear power plants. 

Electrical and electronics Sensor and logic controller Displays Motors Fleaters Power supply Electrical cord 25.00 25.002 ... 

Wire and cable insulation consumes 4% of all PVC with construction and automotive wires, electrical cord jacketing, fibre optic sheathing, heat-shrinkable sleeves. .. Components in phone systems, power tools, refrigerators, washing machines, air conditioners, computers, keyboards, housings. .. 

Probably the most common piece of worn or damaged equipment used in the laboratory is a hot air gun s electrical cord. These cords are frequently frayed due to their heavy use. Electrical cords should always be replaced as soon as there are any signs of fraying, and hot air guns deserve no exception. 

Purge for 3 minutes, for extended fill lines a longer purge may be required. Plug in electrical cord and turn power on. 

Do not allow electrical cords to hang over the edge of the bench. 

It is also possible to extrude silica or alumina paste around a carrier wire or fiber (like the insulation material of electric cords), although concessions may have to be made with respect to the formulation of the paste, to adapt its rheological behavior. An interesting... 

Before plugging an electrical cord into a socket, be sure the equipment is turned off. When you are finished with the equipment, turn it off Before you leave the lab, unplug the equipment, but be sure to turn it off FIRST. 

Do not let electrical cords dangle from work stations. 

Polymers are good thermal and electrical insulators. This is evident in handles of kitchen items and electrical cords, outlets, wiring, refrigerators and freezers. 

Flattened sheets of metal used as prongs in am electrical cord conduct electricity. Pulling metals very thin without breaking them means they are ductile. Wires are an example of ductile metals. 

The prongs on this electrical cord plugs into a wall. It will conduct the electricity to a lamp when switched on. 

Conduction Metals are good conductors of electricity and are often used in electronic products such as televisions, MP3 players, and computers. Electrical cords and most cars are made up of metals. Silver and copper are two of the best conductors of electricity. 

Mines may be sprung at a considerable distance away by the electric battery, as thus described. The Russians had the Malakoff and the Redan Towers all mined underneath, and filled with powder, in order to blow them up if the allies should storm them. They had wires connected with an electric battery at some distance off, but the Malakoft was saved from being blown up when the French entered, for a cannon ball had cut the electric cord, and the mine was thus rendered harmless. Part of the Redan was blown up, but no person was injured, as the English soldiers had been withdrawn almost as soon as they entered, as it was rightly suspected the fort had been mined. 

Real-World Reading Link Have you ever moved a piece of furniture to a new location, only to discover that the new location won t work Sometimes, moving furniture creates a new problem, such as a door will not open all the way or an electric cord will not reach an outlet. Solving a problem only to find that the solution creates a new problem also occurs in science. 

Pigtails, electrical- The electric cord that the electrician provides and installs on an appliance such as a garbage disposal, dishwasher, or range hood. 

Large walk-in refrigerators and freezers, or cold rooms, pose an additional problem with condensation of water vapor on the equipment when electrically operated equipment is placed inside them, due to the very high humidity usually present. Care should be taken to avoid shorts and electrical shocks to persoimel. AU of the equipment should be well grounded and any electrical cords should be insulated with waterproof insulation. A recommended precaution would be to have aU of the electrical sockets in the interior wired with ground-fault interrupters or to require that any equipment used inside must be connected through one. 

Receptacles that provide electric power for operations in hoods should be located outside the hood. This location prevents the production of electrical sparks inside the hood when a device is plugged in or disconnected, and it also allows a laboratory worker to disconnect electrical devices Irom outside the hood in case of an accident. Cords should not dangle outside the hood in such a way that they can accidentally be pulled out of their receptacles or tripped over. Simple, inexpensive plastic retaining strips and ties can be used to route cords safely. For fume hoods with airfoils, the electrical cords should be routed under the bottom airfoil so that the sash can be closed completely. Most airfoils can be easily removed and replaced with a screwdriver. 

Insulate all electrical equipment properly. Visually inspect all electrical cords monthly, especially in any laboratory where flooding can occur. Keep in mind that rubber-covered cords can be eroded by organic solvents and by ozone (produced by ultraviolet lamps). 

Is equipment grounded properly Are electrical cords insulated Is ground fault circuit interruption (GECI) needed ... 

Never use worn or frayed electrical cords or cables. 

OSHA s inspection revealed that employees were exposed to electric shock hazards due to working near an overhead powerline, using damaged/repaired extension cords, and improper construction of electrical cords. 

Cover the proper way to repair damaged electrical cords. The following information is from a Letter of Interpretation dated 12/16/1998. 

Section 1926.416(e)(1) provides that worn or frayed electrical cords or cables shall not be used. Superficial nicks or abrasions — those that only slightly penetrate the outer jacket of a flexible cord, and do not permit the cord to bend more in that area than in the rest of the cord — do not normally render a cord worn or frayed. Therefore, there is no need to repair or replace such a cord. 

Do only those things that you possess adequate training to perform. Check the area for potential hazards such as electrical cords or wires near the spill or obstacles in the path of the emergency response team. Check for injuries and notify emergency medical personnel. Decontaminate victims, if possible. Cooperate with emergency personnel when they arrive, and pass on any information you ve gathered. 

Take precautions to protect the air hose from physical damage. The hose is subject to the same kind of physical damage as electrical cords. 

Electrical cords and electrical power strips can pose hazards if they are used in inappropriate places. Figure 5.3.S.2 shows a power strip lying on its side in a hood. What possible incidents could result from this situation What if a flammable liquid were being used in the hood What if a solution spilled in the hood Figure 5.3.5.3 shows a commonly encountered situation where multiple power strips are plugged into a circuit and multiple cords are plugged into those power strips. This could result in a circuit overload or overheating in the cords. 

Finally, in labs with multiple users, all of whom leave multiple solutions, reagent bottles, and clean or dirty glassware on benches or in hoods collectively reduce the operating space in the lab. A cluttered hood used for temporary storage ultimately becomes a space where the intended function of the hood—a location to conduct experiments—is compromised. Benchtops that are so cluttered that experiments cannot be set up properly become spaces where incompatible chemicals come in close contact or flammable solvents find ignition sources. Capped and covered solvents are more likely to be knocked over and create hazardous situations. Unused stirplate/hot plates or other electrical equipment usually have dangling electrical cords that take up space in an unwieldy fashion. 

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