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ASTM International - ASTM D257-14

Standard Test Methods for DC Resistance or Conductance of Insulating Materials

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Organization: ASTM International
Publication Date: 1 April 2014
Status: inactive
Page Count: 18
ICS Code (Insulating materials in general): 29.035.01
significance And Use:

5.1 Insulating materials are used to isolate components of an electrical system from each other and from ground, as well as to provide mechanical support for the components. For this purpose, it... View More

scope:

1.1 These test methods cover direct-current procedures for the measurement of dc insulation resistance, volume resistance, and surface resistance. From such measurements and the geometric dimensions of specimen and electrodes, both volume and surface resistivity of electrical insulating materials can be calculated, as well as the corresponding conductances and conductivities.

1.2 These test methods are not suitable for use in measuring the electrical resistance/conductance of moderately conductive materials. Use Test Method D4496 to evaluate such materials.

1.3 This standard describes several general alternative methodologies for measuring resistance (or conductance). Specific materials can be tested most appropriately by using standard ASTM test methods applicable to the specific material that define both voltage stress limits and finite electrification times as well as specimen configuration and electrode geometry. These individual specific test methodologies would be better able to define the precision and bias for the determination.

1.4 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.

Document History

March 1, 2021
Standard Test Methods for DC Resistance or Conductance of Insulating Materials
5.1 Insulating materials are used to isolate components of an electrical system from each other and from ground, as well as to provide mechanical support for the components. For this purpose, it is...
ASTM D257-14
April 1, 2014
Standard Test Methods for DC Resistance or Conductance of Insulating Materials
5.1 Insulating materials are used to isolate components of an electrical system from each other and from ground, as well as to provide mechanical support for the components. For this purpose, it is...
May 15, 2007
Standard Test Methods for DC Resistance or Conductance of Insulating Materials
1.1 These test methods cover direct-current procedures for the measurement of dc insulation resistance, volume resistance, and surface resistance. From such measurements and the geometric dimensions...
September 1, 2005
Standard Test Methods for DC Resistance or Conductance of Insulating Materials
1.1 These test methods cover direct-current procedures for the determination of dc insulation resistance, volume resistance, volume resistivity, surface resistance, and surface resistivity of...
October 10, 1999
Standard Test Methods for DC Resistance or Conductance of Insulating Materials
1.1 These test methods cover direct-current procedures for the determination of dc insulation resistance, volume resistance, volume resistivity, surface resistance, and surface resistivity of...
January 1, 1991
Standard Test Methods for D-C Resistance or Conductance of Insulating Materials
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