ASTM D3394 : 16

Standard Test Methods for Sampling and Testing Electrical Insulating Board

Standard Details

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	T 413
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.