Standard Historical Last Updated: Dec 31, 2010 Track Document
ASTM D229-09

Standard Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation

Standard Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation D0229-09 ASTM|D0229-09|en-US Standard Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation Standard new BOS Vol. 10.01 Committee D09
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Significance and Use

This test method provides useful engineering information for evaluating the mechanical behavior of rigid electrical insulation at elevated temperature. When the proper exposure and test temperatures are chosen, depending on the material and end-use operating temperature, the test method may be used as one means of indicating relative thermal degradation of rigid insulating materials.


1.1 These test methods cover procedures for testing rigid electrical insulation normally manufactured in flat sheet or plate form. They are generally used as terminal boards, spacers, voltage barriers, and circuit boards.

Note 1—For tests applying to vulcanized fibre reference should be made to Test Methods D 619.

Note 2—This standard resembles IEC 60893-2, Specification for Rigid Industrial Laminated Sheets Based On Thermosetting Resins for Electrical Purpose, Methods of Tests.

1.2 The test methods appear in the following sections:

Acetone extractable matter83 to 84D 494
Arc resistance47 D 495
Ash56 to 60 ...
Bonding strength49 to 54...
Burning rate and flame resistance61 to 75...
Compressive strength25 D 695
Conditioning 4 D 6054
Dissipation factor34 to 40D 669
Dielectric strength28 to 33D 149
Expansion (linear thermal)76D 696
Flexural properties12 to 24D 790
Hardness (Rockwell)55 D 785
Insulation resistance and resistivity41 to 46D 257
Permittivity34 to 40D 150
Resistance to impact26 D 256
Tensile properties 7 to 11D 638
Thickness 5 to 6D 374
Tracking resistance48 D 2132
Warp or twist77 to 82...
Water absorption27 D 570

1.3 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.

1.4 This is a fire-test-response standard. See Sections 61 through 75, which are the procedures for burning rate and flame resistance.

1.5 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 31.1 and 1.6.

1.6 This standard measures and describes the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions.

17.1 This test method covers the determination of flexural properties at elevated temperature, and as a function of time of exposure to elevated temperature.

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Book of Standards Volume: 10.01
Developed by Subcommittee: D09.07
Pages: 17
DOI: 10.1520/D0229-09
ICS Code: 29.035.01