ASTM D 3394:2016

1.1 These test methods cover the sampling and testing of electrical insulating boards. These boards are porous, usually fibrous sheets used for dielectric and structural purposes in electrical apparatus. 1.2 These test methods are not intended for testing vulcanized fibre or molded laminated sheets. 1.3 These test methods are applicable to board materials having a nominal thickness of at least 0.030 in. (0.76 mm). Note 1: For materials thinner than 0.030 in. (0.76 mm) see Test Methods D202 . 1.4 The test methods appear in the following sections: Sections ASTM Method Reference Apparent Density 18 - 23 Aqueous Extract Characteristics 36 - 42 D202 Ash Content 43 - 46 T413 Compatibility with Dielectric Liquids 47 - 52 D664 , D877 , D924 , D971 , D974 , D1169 , D1500 , D1816 , D3455 , D3487 Compressibility 79 - 85 Conditioning 11 D685 Degree of Polymerization 86 - 89 D4243 Dielectric Strength in Air 53 - 59 D149 Dielectric Strength in Oil 60 - 65 D149 , D2413 , D3426 Dimensions of Sheets 12 - 17 Moisture Content 31 - 35 D644 Oil Absorption 72 - 78 Reports 10 Sampling 6 - 9 D3636 Shrinkage 24 - 30 D644 Tensile Properties 66 - 71 D202 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

29.035.01