ASTM D120-95

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 120 – 95
Standard Specification for
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Rubber Insulating Gloves
This standard is issued under the fixed designation D 120; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope D 1415 Test Method for Rubber Property—International
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Hardness
1.1 This specification covers acceptance testing of rubber
D 2240 Test Method for Rubber Property—Durometer
insulating gloves for protection of workers from electrical
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Hardness
shock.
2.2 ANSI Standard:
1.2 Two types of gloves are provided and are designated as
ANSI C84.1 Voltage Ratings for Electric Power Systems
Type I, non-resistant to ozone, and Type II, resistant to ozone.
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and Equipment
1.3 Six classes of gloves, differing in electrical characteris-
tics, are provided and are designated as Class 00, Class 0, Class
3. Terminology
1, Class 2, Class 3, and Class 4.
3.1 Definitions of Terms Specific to This Standard:
1.4 The values stated in SI units are to be regarded as the
3.1.1 breakdown—the electrical discharge or arc occurring
standard.
between the electrodes and through the equipment being tested.
1.5 The following safety hazards caveat pertains only to the
3.1.2 color splash—a smear or streak of contrasting color
test method portion, Sections 16, 17, 18, and 19, of this
evident on the inside or outside surface of the gloves that was
specification: This standard does not purport to address all of
deposited during the dipping operation and is vulcanized into
the safety concerns, if any, associated with its use. It is the
the glove as part of the homogenous compound.
responsibility of the user of this standard to establish appro-
3.1.3 flashover—the electrical discharge or arc occurring
priate safety and health practices and determine the applica-
between electrodes and over or around, but not through, the
bility of regulatory limitations prior to use. For specific
equipment being tested.
precaution statements, see 18.2.
3.1.4 gauntlet—the area of the glove between the wrist and
2. Referenced Documents the reinforced edge of the opening.
3.1.5 glove cuff roll—the roll or reinforced edge of an
2.1 ASTM Standards:
insulating glove at the cuff.
D 297 Test Methods for Rubber Products—Chemical
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3.1.6 halogenation—exposure of the entire glove surface
Analysis
area to a halogen for the purpose of reducing surface friction.
D 412 Test Methods for Vulcanized Rubber and Thermo-
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3.1.7 insulated—separated from other conducting surfaces
plastic Rubbers and Thermoplastic Elastomers—Tension
by a dielectric substance (including air space) offering a high
D 518 Test Method for Rubber Deterioration—Surface
2 resistance to the passage of current.
Cracking
3.1.7.1 Discussion—When any object is said to be insu-
D 573 Test Method for Rubber—Deterioration in an Air
2 lated, it is understood to be insulated in a suitable manner for
Oven
the conditions to which it is subjected. Otherwise, it is, within
D 624 Test Method for Tear Strength of Conventional
2 the purpose of this definition, uninsulated. Insulating covering
Vulcanized Rubber and Thermoplastic Elastomers
of conductors is one means of making the conductor insulated.
D 1149 Test Method for Rubber Deterioration—Surface
2 3.1.8 isolated—an object that is not readily accessible to
Ozone Cracking in a Chamber
persons unless special means of access are used.
3.1.9 ozone—a very active form of oxygen that may be
produced by corona, arcing, or ultraviolet rays.
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This specification is under the jurisdiction of ASTM Committee F-18 on
Electrical Protective Equipment for Workers and is the direct responsibility of
Subcommittee F18.15 on Worker Personal Equipment. This standard replaces ANSI
Standard J 6.6, which is no longer available.
Current edition approved Dec. 10, 1995. Published February 1996. Originally
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published as D 120 – 21 T. Last previous edition D 120 – 94a. Available from American National Standards Institute, Inc., 11 West 42nd
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Annual Book of ASTM Standards, Vol 09.01. Street, 13th Floor, New York, NY 10036.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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D 120
TABLE 1 Proof-Test/Use Voltage Relationship
3.1.10 ozone cutting and checking—the cutting action pro-
duced by ozone on rubber under mechanical stress into a series A-C Proof-Test D-C Proof-Test Maximum Use
Class of Glove
A
Voltage rms V Voltage avg V Voltage a-c rms, V
of interlacing cracks.
00 2 500 10 000 500
3.1.11 rubber—a generic term that includes ela
...