Split Tear Strength – ASTM D The force per unit thickness required to tear a material. Test specimens are placed in a tensile test machine. The jaws are set. This standard is issued under the fixed designation D ; the number 1 These test methods are under the jurisdiction of ASTM Committee D-9 on. Electrical. ASTM D Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable.
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On short sections of wire or cable, a guard circuit is permitted to prevent end leakage.
Hold the cable during bending operations in such a way that it cannot revolve around its own axis. See Sections 20, 27, 33, 42, 48, 54, 62, 68, 76,and Place the two halves of the split end of the test specimen in the jaws of the tension testing machine and separate the jaws at the rate of 20 in.
NOTE 2—To limit the maximum voltage stress on the insulation at the conductor to a safe value, the minimum d4700 of the conductor shall be in d47 with Table 1A.
ASTM D – 99 Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable
For heavier specimens, cut a segment of e470 from the conductor measuring 4 in. Adjust the height of the? The separation of the insulation results from the amalgamation of the tin of the conductor with the mercury. Then ash the weighed specimen, and record the weight of ash as B.
Make an effort to separate the jacket from the insulation by slitting the covering through to the conductor and pulling the jacket and insulation apart by pliers. Stretch one length of covering into the clamps of the buffing apparatus so that it lies?
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Determine the tensile strength and elongation at the same time that the original properties are determined see Section Maintain a pressure of approximately 1?
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Insert a thermometer into the cover of the test chamber with its bulb as near the test specimens as practicable. No testing is necessary for manufacturing lots smaller than 10 ft. Failure occurs when the circuit breaker trips.
Because of this it is important to measure the concentration of ozone in the d4470, using commercially available monitoring devices, whenever the odor of ozone is persistently present or when ozone generating conditions continue. The amalgamation is assisted by? Wipe off the excess surface moisture with blotting d740 and allow the specimen to remain at room temperature for 10 min. Without immersing the cable in water dry testapply the speci?
ASTM D470 – 13
This test is used for product acceptance to speci? If the jacket cannot be removed, prepare specimens by buffing. Designate this weight as B.
Calculation of Area of Specimens From this sample prepare test specimens 1 in. Support the specimens in an approximately vertical plane midway between the top and bottom, with the free ends down to, but not touching, the bottom. When the lot consists of more than two coils dd470 reels and less than 20 coils or reels, make at least axtm determination of the thickness on each of two coils or reels taken at random.
The conductor sizes and insulation thicknesses given in each voltage class are not necessarily suitable for all types of cable or conditions of service where mechanical stresses govern.
Bend one specimen in the direction and plane of the existing curvature of the cable around a mandrel and through the speci?
Tensile strength, tensile stress, and ultimate elongation Permanent set For Aging Tests: If, at any time, the water becomes dirty, or shows the presence of a surface? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
The tank contains a heater of sufficient capacity to maintain the speci? The tracking voltage is the voltage at which no failures occur on?
In extreme cases, use of a segmental specimen is permitted. For determination of ozone concentrations see Sections 93 to It is usually desirable for a cable to have a high value of insulation resistance. Capacitance, Cold bend, Crosslinked insulation, Dielectric withstand, Dissipation factor, Flammability, Heat distortion, Heat exposure agingHorizontal flame test, Insulation resistance, Mineral filler content, Oil immersion, Ozone resistance, Partial-discharge extinction level, Permittivity, Set test, Surface resistivity, Tear test, Track resistance, U-bend discharge, Water absorption tests.
Physical tests provide useful data for research and development, engineering design, quality control, and acceptance or rejection under speci?
Your comments are invited either for revision of this standard or for additional standards and adtm be addressed to ASTM International Headquarters. NOTE 5—The selection of the cable insulation level to be used in a particular installation shall be made on the basis of the applicable phase-to-phase voltage and the general system category as outlined in the following paragraphs: Water Absorption Test, Accelerated. Remove the dust for approximately a 0.
This test provides useful data for research and development, engineering design, quality control, and acceptance or rejection under speci? Capacitance and Dissipation Factor Tests.
ASTM D – 13 – Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable
Mineral Filler Content, Determination of. Application of Voltage to Cable NOTE 1—Resistor values in microammeter shunt will vary with the meter used and with the concentration scale desired. Precision and Bias Their use is recommended also for resonant grounded systems.