ASTM D470 PDF

ASTM D470 PDF

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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If necessary, obtain the values from r470 table giving the areas of segments of a unit circle for the ratio of the height of the segment to the diameter of the circle. Bend one specimen in the direction and plane of the existing curvature of the cable around a mandrel and through the speci?

ASTM D470 – 13

Ozonization of the air is accomplished in a generator consisting of a pair of concentric electrodes, separated by a thin glass dielectric, between which voltage is applied.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

In common with ashm electrical equipment, the use of cables is not recommended on systems where the ratio of the zero to positive phase reactance of the system at the point of cable application lies between? This test provides useful data for research and development, engineering design, quality control, and acceptance or rejection under speci?

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Determine the tensile strength and elongation at the same time that the original properties are determined see Section A fresh solution of 1 g of soluble starch in mL of boiling water is another available option.

Express the increase in capacitance from 1 to 14 days and from 7 to 14 days as a percentage of the 1 and 7-day values, respectively. The values obtained in these tests are useful to provide data for research and development, design engineering, quality control, and acceptance or rejection under speci? The sequence of other testing is not speci? Stretch one length of covering into the clamps of the buffing apparatus so that it lies?

Water absorption tests, properly interpreted, provide information with regard to the water absorption properties of the insulation. Heat Distortion Test Search all products by. Electrical tests provide useful data for research and development, engineering design, quality control, and acceptance or rejection under speci?

d4770 Collection of Sample See Test Methods D for a more complete discussion of the signi? See Test Method D Please download Chrome or Firefox or view our browser tips. Increase the applied voltage sufficiently to indicate detector response to partial discharge, but do not exceed the ac test voltage speci? The tracking voltage is the voltage at which no failures occur on? Physical Tests of Insulation and Jacket Compounds.

Surface resistivity testing provides useful data for research and development, design engineering, quality control, and acceptance or rejection under speci? The separation of the insulation results from the amalgamation of the tin of the conductor with the mercury. Take care not to handle the insulation.

These test methods do not apply to the class of products known as flexible cords.

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ASTM D – 13 Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable

Remove the outer braid, together with adhering compound, from a 6-in. Then ash the weighed specimen, and record the weight of ash as B. Measure the diameter of the uninsulated conductor also, and calculate the original thickness of the insulation, T1 as follows: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Weigh the specimen to the nearest 1 mg, and designate this weight as A.

For the ast, test mark the specimens with gage marks 2 in. Then remove it from the desiccator, weigh to the nearest 10 mg, and record the weight as W. Adjacent turns shall not touch each other but shall be separated about 1? The test voltage is permitted to be of either polarity. This test provides data for research and development, engineering design, quality control, and acceptance or rejection under speci?

For determination of ozone concentrations see Sections 93 to One test specimen shall be taken for the? At the end of the 18 h remove the specimens from the oil and allow to rest at room temperature for a period of 4 6 1?

If either such specimen fails to pass this test, d70 lot shall be asttm.