ASTM D257-99(2005)
Standard Test Methods for DC Resistance or Conductance of Insulating Materials

Standard No.

ASTM D257-99(2005)

Release Date

1999

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D257-07

Latest

ASTM D257-14(2021)e1

Scope

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 electrical insulating materials, or the corresponding conductances and conductivities.

1.2 These test methods are not suitable for use in measuring the electrical resistivity/conductivity of moderately conductive materials. Use Test Method D 4496 to evaluate such materials.

1.3 The test methods and procedures appear in the following sections:

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. For a specific hazard statement, see .

ASTM D257-99(2005) history

• 2021 ASTM D257-14(2021)e1 Standard Test Methods for DC Resistance or Conductance of Insulating Materials
• 2014 ASTM D257-14 Standard Test Methods for DC Resistance or Conductance of Insulating Materials
• 2007 ASTM D257-07 Standard Test Methods for DC Resistance or Conductance of Insulating Materials
• 1999 ASTM D257-99(2005) Standard Test Methods for DC Resistance or Conductance of Insulating Materials
• 1999 ASTM D257-99 Standard Test Methods for DC Resistance or Conductance of Insulating Materials
• 1991 ASTM D257-91 Standard Test Methods for D-C Resistance or Conductance of Insulating Materials