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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Learn more about the cookies we use and how to change your settings. Calculate the strength of the Na2S2O3 solution in accordance with Take the minimum thickness of the insulation as the difference between a measurement made over the conductor or any separator plus the thinnest insulation wall, and the FIG.
It is aetm that the microammeter be marked to read directly in percentage ozone. Repeat this procedure four times per minute for a minimum of ten cycles and a maximum of? However, results of this test are useful as elements of a? Distortion 5 [T1 2 T2! Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the ashm.
Acceptance on Basis of Tests on Short Specimens Do not include the thickness of any separator in the thickness of insulation. For the tear test, six ast specimens as described in 8. Control the pressure by the degree of closure of the discharge cock.
Take the smart route to manage medical device compliance. For cables having a metallic sheath, shield, or armor over the individual conductor sapply the speci? Consult the manufacturer for insulation thicknesses. The test voltage is permitted to be of either polarity. Failure of either of the retests indicates nonconformity of the sample to the requirement speci? Three-conductor cables shall be tested with grounded three-phase voltage or with single-phase voltage.
Remove any nonadherent protective coverings applied to the insulation. Unless otherwise indicated, the intention is that all reagents conform to the speci? A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Remove the conductor from two short lengths of wire by slitting the covering. No testing is necessary for manufacturing lots smaller than 10 ft.
Obtain a 15 ft 4. The bottom of the dessicator is to be?
Electrical Tests of Insulation. Then, with the water as the ground electrode, apply the voltage between the conductor and the water. Move the burner up to the specimen so that the tip of the inner blue cone just touches the specimen at a point midway between the supports.
ASTM D – 99 Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable
Application of Voltage to Cable To determine the test to be made on the particular insulation ast, jacket, refer to the product speci? For determination of ozone concentrations see Sections 93 to 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.
Determine the tensile strength and elongation at the same time that the original properties are determined see Section Mercury, being a liquid with high surface tension and quite heavy, will disperse into small droplets and seep into cracks and crevices in the? Perform tests between 24 h and 60 days after crosslinking unless agreed to by the manufacturer. This applies either to a straight test specimen or to one stamped out with a die, and assumes that corrugations have been removed.
Nonshielded cables shall be tested in a grounded water bath or d4470 a foil. Weigh the specimen to the nearest 1 mg and designate this as C. For heavier specimens, cut a segment of insulation from the conductor measuring 4 in.
On short sections of wire or cable, a guard circuit is permitted to prevent end leakage. Voltage source must be capable of providing kV. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. When making high voltage tests, particularly in compressed gas or in oil, the energy released at breakdown may be suff?
ASTM D470 – 13
Measurement of Thickness of Specimens 9. Perform physical tests on both aged and unaged specimens at the same time. This standard wstm subject to revision at any time by the responsible technical committee and must be reviewed every? Rate of Voltage Application xstm After generating the ozone for at least 15 min, make a check on the percentage of ozone concentration see Water absorption tests can also give an indication of the surface condition of ashm insulation.
This standard has been approved for use by agencies of the Department of Defense. Measure the diameter of the uninsulated conductor also, and calculate the original thickness of the insulation, T1 as follows: Analysis of Sample 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.
Historical Version s – view previous versions of standard. If, at any time, the water becomes dirty, or shows the presence of a surface?