ASTM D470 PDF

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

One test specimen shall be taken from the? Distortion 5 [T1 2 T2! Make the measurement at a voltage of to Vdc. Types of Voltage Tests The rate of air? The set is the difference between this length and the original 2-in. Remove the outer braid, together with adhering compound, from a 6-in. Control the temperature by keeping the apparatus in an air-conditioned room or by partially immersing the chamber in a water bath, either connected to a hot-and-cold water system or provided with thermostatically controlled electric heaters.

See Sections 20, 27, 33, 42, 48, 54, 62, 68, 76,and Water Absorption Test on Fibrous Coverings. NOTE 8—These thicknesses are based on qstm construction.

ASTM D470 – 13

Support the specimens in an approximately vertical plane midway between the top and bottom, with the free ends down to, but not touching, the wstm. A low dissipation factor minimizes circuit losses. Their use is recommended also for resonant grounded systems.

For the set test mark the specimens with gage marks 2 in. Then ash the weighed specimen, and record the weight of ash as B. Wipe off the excess surface moisture with blotting paper and allow the specimen to remain at room temperature for 10 min. Water absorption tests, properly interpreted, provide information with regard to the water absorption properties of f470 insulation.

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In the case of wire and cable of AWG 6 and larger, or in the case of wire and cable smaller than AWG 6 having an insulation thickness greater than 0. Repeat e470 procedure four times per dd470 for a minimum of ten cycles and a maximum of? At the end of this 1 h period, place the specimen directly asgm the foot of the micrometer and allow it to remain in the oven under load for 1 h.

Apply a Hz potential to the remaining three electrodes of each specimen. Find Similar Items This product falls into the following categories. The test voltage is permitted to be of either polarity. Perform tests between 24 h and 60 days after crosslinking unless agreed to by the manufacturer. For wire sizes larger than AWG 2 At the end of 1 h period, place the specimen in the oven, allowing both the micrometer f470 test specimen to remain in the oven for 1 h.

Since this solution gradually loses its strength, standardize it against the standard iodine solution on the day tests are run.

This test is used for product acceptance to speci? It is the responsibility of the user of this standard to establish appropriate safety d4470 health practices and determine the applicability of regulatory limitations prior to use.

The amalgamation is assisted by? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. With the exception of the tear tests, the test specimen shall be either a segment or sector cut with a suitable sharp instrument or a shaped specimen cut out with a die and shall have a cross-sectional area not greater than 0.

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

Current edition approved September 1, On short sections of wire or cable, a guard circuit is permitted to prevent end leakage. If both such second specimens pass this test, the lot of cable except the length which was rejected because of failure of the?

Remove any nonadherent protective coverings applied to the insulation. In common with other 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? Take the sample before application of the insulation shield, or remove the strippable insulation shield.

The mandrel diameter shall be in accordance with Table 7. No testing is necessary for manufacturing lots smaller than 10 ft. Axtm, being a liquid with high surface tension and quite heavy, will disperse into small droplets and seep into cracks and crevices in the?

Discard the solution after one week and prepare astj solution. Determine the tear resistance by dividing the load in pounds or kilograms required to tear the section by the thickness of the test specimen in inches or millimeters.

Designate this weight as B. Test such assemblies while they are still immersed in water and after they have been immersed for at least 1 h.

Without immersing the cable in water dry testapply the speci?

Determine all weights to the nearest 0. Use the coefficient furnished by the manufacturer for the particular insulation or determine it in accordance with Section