ASTM D470-2013

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astm d470-13是关于《电线和电缆用交联绝缘材料与套管的标准试验方法》现行版本标准修订于2013年，替代原astm d470-99版本使用。
1. scope1.1 these test methods cover procedures for testing crosslinked insulations and jackets for wire and cable. to determine the test to be made on the particular insulation or jacket, refer to the product specification for that type. these test methods do not apply to the class of products known as flexible cords.
1.2 in many instances the insulation or jacket cannot be tested unless it has been formed around a conductor or cable. therefore, tests are done on insulated or jacketed wire or cable in these test methods solely to determine the relevant property of the insulation or jacket and not to test the conductor or completed cable.
1.3 the procedures appear in the following sections:
sections
ac and dc voltage withstand tests22 to 29
capacitance and dissipation factor tests38 to 44
cold bend128
cold bend, long-time voltage test on short specimens51 to 57
double ac voltage test on short specimens 45 to 50
electrical tests of insulation17 to 64
heat distortion test127
horizontal flame test100 to 104
insulation resistance tests on completed cable30 to 37
mineral filler content, determination of111 to 115
ozone resistance test87 to 99
partial-discharge test58 to 64
physical tests of insulation and jacket compounds 5 to 16
surface resistivity test116 to 120
track resistance test129 to 132
u-bend discharge test121 to 125
water absorption test65 to 71
water absorption test, accelerated72 to 86
water absorption test on fibrous coverings 105 to 110
1.4 whenever two sets of values are presented, in different units, the values in the first set are the standard, while those in the parentheses are for information only.
1.5 this standard does not purport to address all of the safety problems, if any, associated with its use. it is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. for specific hazards see section 4.
2. referenced documentsastm standards
d149 test method for dielectric breakdown voltage and dielectric strength of solid electrical insulating materials at commercial power frequencies
d150 test methods for ac loss characteristics and permittivity (dielectric constant) of solid electrical insulation
d257 test methods for dc resistance or conductance of insulating materials
d412 test methods for vulcanized rubber and thermoplastic elastomerstension
d454 test method for rubber deterioration by heat and air pressure
d572 test method for rubberdeterioration by heat and oxygen
d573 test method for rubberdeterioration in an air oven
d1193 specification for reagent water
d1711 terminology relating to electrical insulation
d2132 test method for dust-and-fog tracking and erosion resistance of electrical insulating materials
d3755 test method for dielectric breakdown voltage and dielectric strength of solid electrical insulating materials under direct-voltage stress
d5025 specification for laboratory burner used for small-scale burning tests on plastic materials
d5207 practice for confirmation of 20-mm (50-w) and 125-mm (500-w) test flames for small-scale burning tests on plastic materials
d5423 specification for forced-convection laboratory ovens for evaluation of electrical insulation

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