Cables rubber-insulated

Armored Cable.—Rubber insulated and covered with interlocking metallic strips. 

R. B. Blodgett, "Ethylene—Propylene Rubber and Crosslinked Polyethylene as Insulations for 90°C Rated Medium Voltage Cables," Rubber Chem. Technol, 52, 410-424 (1978). 

NEMA WC3/1992 (ICEA S-19) Rubber insulated wire and cable for the transmission and distribution of electrical energy ... 

D 2802 Ozone-Resistant Ethylene-Propylene Rubber Insulation for Wire Cable. 

IEC60245 Rubber insulated cables of rated voltages up to and including 450/750 V. Six... 

BS6007 Rubber insulated cables for electric power and lighting. 

BS6622 Specification for cables with extruded cross-linked polyethylene or ethylene propylene rubber insulation for rated voltages from 3.8/6.6 kV up to 19/33 kV. 

Fig. 27.1 The NMR-MOUSE measuring the rubber insulation of a high-power underground cable sleeve. A defect is located at positions 1, 2, and 3 with an average of T2efr = 3.6 ms, while the regular material exhibits an average value at positions 4, 5, and 6 of 72eff = T8 ms. T2eff is defined in the text.

CAS 21645-51-2 EINECS/ELINCS 244-492-7 Uses Flame retardant, smoke suppressanL processing aid, water resist, aid, antistat for wire/cable, elec, insulators, printed circuit boards, potting resins, molded and extruded polyolefins, flooring compds., conveyor belting, fabric coatings, polyester and aciylic pultrusion compds., thermosetting resins (BMC, SMC), PVC, EVA, EPDM, XLPE, EEA, thermoplastic elastomers, silicone rubber, NR, SR, acrylic resins, unsat. polyesters... 

Ozone-Resistant Ethylene-Propylene Rubber Insulation for Wire and Cable, Spec, for, (D 2802) 33... 

There is some overlap in the performance of metakaolinite and calcined clay in certain polymers and hence some contiguous applications such as low-voltage rubber cable insulation, but there are significant differences, which leads to separate use patterns. Thus, metakaolinite is mainly used in PVC cable insulation because it improves (uniquely) the electrical resistivity of plasticised PVC, while calcined clay is used in polyethylene (PE) film, rubber cables, rubber pharmaceutical applications and rubber extrusions for a variety of reasons linked to its shape, size and chemical inertness. The refractory product finds limited use in epoxy and unsaturated polyester mouldings, which have to resist abrasion and chemical attack. 

In the manufacture of rubber-insulated cables or rubber hoses the lead sheath is applied for the vulcanizing process only. The sheathed cable or hose is coiled on drums which are placed in a steam-heated tank which is closed tightl3 with a lid. During vulcanization the hoses must be forced from their inside against the lead sheath. To achieve this, they are filled with hot water which at the vulcanizing temperature of 140 to 150 °0 attains a pressure of 4 to 5 atm. Upon completion of the vulcanization, the cable or hose is wound off the drum and passed through a stripp-... 

On account of what has been said in the foregoing, these presses destined for the production of rubber-insulated cable and rubber hoses, may be charged with solid cylindrical lead billets instead of molten lead. Thus the solidification periods are eliminated and a substantial increase in production is achieved. 

First success was achieved when a rotating screw was employed to carry molten lead continuously into the die-block, this method being derived from the many screw presses in use for the production of rubber-insulated cable. This development commenced about 30 years ago and eventually lead to the construction of continuous lead screw presses. Although these machines are beyond the scope of this book, a brief description will be given to round off the picture. 

Uses Sec. accelerator for mercapto and sulfanamide accelerators accelerator used alone for thick-sectioned goods in conjunction with other accelerators for tech, rubber goods (roll covers, moldings, extrudates, footwear, fabric proofings, cable sheathing/insulation) foam stabilizer for latex compds. food-contact rubber articles... 

In an extensive study carried out by the Baltimore Gas and Electric Co., Baltimore USA, silicone rubber insulated cables of various designs were... 

Silicone rubber insulated cables have been developed which meet the stringent requirements of the lEC 331 specification, including the all important 3 h flame test. In this test the cable is required to function for 3 h at working voltage in a gas flame of 750 °C. In addition, silicone cable is available which meets BS4066 and IEC332 requirements for flame retardant cables. Silicone rubber also has a low calorific value (3 8 kcal/g) which when combined with the other features described above makes it a natural choice for cable insulation in many other applications. 

During the next few years PVC was steadily developed in the United States and in Germany. Both countries were producing the material commercially before World War II. In Great Britain, ICI in 1942 and the Distillers Company in 1943 also commenced pilot-plant production of PVC, a material then in demand as a rubber substitute for cable insulation. Paste-forming grades suitable for the production of leathercloth also became available soon afterwards. 

Butyl ruhher vulcanizates have tensile strengths up to 2,000 psi, and are characterized hy low permeahility to air and a high resistance to many chemicals and to oxidation. These properties make it a suitable rubber for the production of tire inner tubes and inner liners of tubeless tires. The major use of butyl rubber is for inner tubes. Other uses include wire and cable insulation, steam hoses, mechanical goods, and adhesives. Chlorinated butyl is a low molecular weight polymer used as an adhesive and a sealant. 

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