ASTM D120 Insulating Gloves

Published 12 Jun 2018

ASTM D120 Insulating Gloves

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ASTM D120 specification covers manufacturing and testing of rubber insulating gloves for protection of workers from electrical shock.

Two types of insulating gloves are provided and are designated as Type I, non-resistant to ozone, and Type II, resistant to ozone.

Six classes of ASTM D120 compliant insulating gloves differing in electrical characteristics are provided and are designated as Class 00, Class 0, Class 1, Class 2, Class 3 and Class 4.

The following tests shall be performed as part of the ASTM D120 Standard Specification for Rubber Insulating Gloves:

  • ac proof test
  • ac breakdown test
  • ac moisture absorption/proof test
  • dc proof test
  • dc breakdown test
  • ozone resistance test
  • chemical tests
  • tensile strength
  • tear resistance test
  • puncture resistance test

This following abstract is a brief summary of the referenced ASTM D120 standard – this is provided for informational purposes only and not an official part of the ASTM D120 standard; the full text of the standard itself must be referred to for its use and application.

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

Scope Of ASTM D120

1.1 This specification covers manufacturing and testing of rubber insulating gloves for protection of workers from electrical shock

1.2 Two types of gloves are provided and are designated as Type I, non-resistant to ozone, and Type II, resistant to ozone

1.3 6 classes of insulating gloves each differing in electrical characteristics are provided and are designated as Class 00, Class 0, Class 1, Class 2, Class 3, and Class 4

1.4 The values stated in SI units are to be regarded as standard. See IEEE/ASTM SI 10

1.5 The following safety hazards caveat pertains only to the test method portion, Sections 161718, and 19, of this specification. 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. 

Insulating Gloves

The following table enables the selection of ASTM D120 Insulating Gloves according to working voltage and insulating class category – should you require any assistance with the correct type, specification or size of gloves please do not hesitate to contact us.

CATU Electrical Code  Insulating Glove Class Voltage  Type  Inches Colour 
CATU CGA-00 Class 00 ≤ 500V 1 14 Black
CATU CGA-0 Class 0 ≤ 1000V 1 14 Black
CATU CGA-1 Class 1 ≤ 7500V 1 14 Bi-Colour
CATU CGA-2 Class 2 ≤ 17000V 1 14 Bi-Colour
CATU CGA-3 Class 3 ≤ 26500V 1 14 Bi-Colour
CATU CGA-4 Class 4 ≤ 36000V 1 16 Bi-Colour

Further Reading