ASTM F2320-03

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F2320 – 03
Standard Specification for
Rubber Insulating Sheeting
This standard is issued under the fixed designation F2320; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope D518 Test Method for Rubber Deterioration—Surface
Cracking
1.1 This specification covers testing of rubber insulating
D570 Test Method for Water Absorption of Plastics
sheeting for use as a covering for the protection of workers
D751 Test Methods for Coated Fabrics
from accidental contact with live electrical conductors, appa-
D1048 Specification for Rubber Insulating Blankets
ratus, or circuits.
D1149 Test Methods for Rubber Deterioration—Cracking
1.2 Two types of sheeting, differing in chemical and physi-
in an Ozone Controlled Environment
cal characteristics, are provided and are designated as Type I,
D2136 Test Method for Coated Fabrics—Low-Temperature
non-resistant to ozone and Type II, resistant to ozone.
Bend Test
1.3 Six classes of sheeting, differing in electrical protection
D2240 Test Method for Rubber Property—Durometer
characteristics are provided and designated as Class 00, Class
Hardness
0, Class 1, Class 2, Class 3, Class 4.
2.2 Other Standards:
1.4 Two styles of sheeting, differing in construction charac-
MVSS 302 Motor Vehicle Safety Standard 302 Flammabil-
teristics, are provided and are designated as Style A and Style
ity of Interior Materials
B.
UL214 StandardforTestsforFlame-PropagationofFabrics
1.5 The follow safety hazards caveat applies only to the test
and Films
method portion, Sections 17-19, of this specification. This
ANSI C84.1 Voltage Ratings for Electric Power Systems
standard does not purport to address all of the safety concerns,
and Equipment (60 Hz)
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
3. Terminology
practices and determine the applicability of regulatory require-
3.1 Definitions:
ments prior to use.
3.1.1 user—the entity employing the actual worker(s) uti-
NOTE 1—Rubber Insulating Sheeting should remain flexible for use
lizing the equipment; if no separate employer, then the indi-
through normal temperature ranges.
vidual.
NOTE 2—Rubber as used in this specification is a generic term that
3.1.2 voltage, maximum use—the ac voltage (rms) classifi-
includes elastomers and elastomeric compounds, regardless of origin.
cation of the protective equipment that designates the maxi-
2. Referenced Documents mum nominal design voltage of the energized system that may
2 be safely worked. The nominal design voltage is equal to
2.1 ASTM Standards:
phase-to-phase voltage on multiphase circuits.
D149 Test Method for Dielectric Breakdown Voltage and
3.1.2.1 Discussion—If there is no multiphase exposure in a
Dielectric Strength of Solid Electrical Insulating Materials
system area, and the voltage exposure is limited to phase
at Commercial Power Frequencies
(polarityondcsystems)togroundpotential,thephase(polarity
D412 Test Methods for Vulcanized Rubber and Thermo-
ondcsystems)togroundpotentialshallbeconsideredtobethe
plastic Elastomers—Tension
nominal design voltage.
D471 Test Method for Rubber Property—Effect of Liquids
This specification is under the jurisdiction of ASTM Committee F18 on
Electrical Protective Equipment for Workers and is the direct responsibility of Withdrawn. The last approved version of this historical standard is referenced
Subcommittee F18.25 on Insulating Cover-up Equipment. on www.astm.org.
Current edition approved Nov. 1, 2003. Published December 2003. DOI: Available from the U.S. Department of Transportation, 400 7th Street SW,
10.1520/F2320-03. Room 6111, Mail Code: NSA-30, Washington, DC 20590.
2 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Underwriters Laboratories (UL), Corporate Progress, 333
contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM Pfingsten Rd., Northbrook, IL 60062.
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F2320 – 03
3.1.2.2 Discussion—If the electrical equipment and devices 5.1.1 Type I, non-resistant to ozone, made from any elas-
are insulated or isolated or both, such that the multiphase tomer or combination of elastomeric compounds of natural or
exposure on a grounded wye circuit is removed, then the synthetic origin.
nominal design voltage may be considered as the phase-to- 5.1.2 Type II, ozone resistant, made from any elastomer or
ground voltage on that circuit. combination of elastomeric compounds of natural or synthetic
3.1.3 voltage, nominal design—a nominal value consistent origin, which may include one or more of the following special
with the latest revision of ANSI C84.1, assigned to the circuit properties:
or system for the purpose of conveniently designating its
A—Flame Resistance
B—Oil Resistance
voltage class.
5.1.3 The class designation is based on the electrical prop-
4. Significance and Use
erties as shown in Tables 1-3.
4.1 This specification covers the minimum electrical, 5.1.4 Style A, constructed of the elastomers indicated under
chemical and physical properties guaranteed by the manufac- Type I or Type II, shall be free of any reinforcements.
turer and the detailed procedures by which such properties are 5.1.5 Style B, constructed of the elastomers indicated under
tobedetermined.Thepurchasermayashis/heroption,perform Type I or Type II, shall incorporate a reinforcement or
or have performed any of these tests in order to verify the reinforcements; this shall not adversely affect the dielectric
guarantee. Claims for failure to meet the specification are characteristics of the sheeting.
subject to verification by the manufacturer.
6. Ordering Information
4.2 Rubber Insulating Sheeting is used for personal protec-
tion; therefore, when authorizing its use a margin of safety 6.1 Orders for Rubber Insulating Sheeting under this speci-
shall be allowed between the maximum voltage at which it is fication should include the following information:
used and the proof-test voltage at which it is tested. The 6.1.1 Type,
relationship between proof-test and the maximum voltage at 6.1.2 Class,
6.1.3 Width,
which Sheeting shall be used is shown in Table 1.
4.3 Work practices vary from user to user, depending upon 6.1.4 Length, and
many factors. These factors may include, but are not limited to 6.1.5 Style.
operating system voltages, design, work procedures and tech-
7. Manufacture and Marking
niques, weather conditions, etc. Therefore, except for the
restrictions set forth in this specification because of design 7.1 The sheeting shall consist of a rubber compound with a
limitations, the use and maintenance of the equipment is surface free of harmful physical irregularities, as defined in
beyond the scope of this specification. 11.1, and may have one or more fabric inserts.Any such fabric
4.3.1 Itiscommonpracticeandtheresponsibilityoftheuser insert shall not affect adversely the dielectric characteristics of
of this type of protective equipment to prepare complete the sheeting.
instructions and regulations to govern the correct and safe use 7.2 Thesheetingshallbemarkedclearlyandpermanentlyat
of such equipment. a maximum interval of 0.33 m (1ft) with the name of the
manufacturer or supplier, ASTM (this specification#), Type,
5. Classification
and Class.
5.1 Sheeting covered under this specification shall be des-
8. Chemical and Physical Requirements
ignated as Type I or Type II: Class 00, Class 0, Class I, Class
8.1 Insulating Sheeting shall conform to the applicable
2, Class 3, or Class 4; Style A or Style B.
chemical and physical requirements in Table 4.
9. Electrical Requirements
TABLE 1 Proof Test/Use Relationship
9.1 Theentirelengthwhennew(unused)shallwithstandthe
NOTE—The ac voltage (rms) classification of the protective equipment
60-Hz ac proof-test voltage (rms value), Table 2 or the dc
designates the maximum nominal design voltage of the energized system
thatmaybesafelyworked.Thenominaldesignvoltageisequalto:(a)The
phase to phase voltage on multiphase circuits, or (b) the phase to ground
TABLE 2 AC Electrical Test Requirements
voltage on single phase grounded circuits.
Dielectric
AC Clearances Proof Test
Maximum Breakdown
A
Class of Class Electrode min Voltage
A
Use Voltage AC Proof-Test DC Proof-Test Test Voltage
Insulating mm in. rms V
Phase-Phase Voltage, rms V Voltage, avg V rms V
Sheeting
ac rms, max
00 76 3 2500 4000
00 500 2500 10 000 0 76 3 5000 6000
0 1000 5000 20 000 1 76 3 10 000 20 000
1 7500 10 000 40 000 2 127 5 20 000 30 000
2 17 000 20 000 50 000 3 178 7 30 000 40 000
3 26 500 30 000 60 000 4 254 10 40 000 50 000
4 36 000 40 000 70 000
A
These nominal clearances are intended to avoid flashover and may be
A
Except for Class 00 and 0 equipment, the maximum use voltage is based on increased from the standard of 100 kPa (1 atm) barometric pressure and average
the following formula: maximum use voltage (maximum nominal design voltage) = humidity by no more than 51 m (2 in.) when required by change in atmospheric
0.95 ac proof-test voltage–2000. conditions. These clearances may be decreased if atmospheric conditions permit.
F2320 – 03
TABLE 3 DC Electrical Test Requirements
10.2 Thickness—The thickness of the sheeting shall be as
Dielectric specified in Table 5.
DC Clearances Proof Test
Breakdown
A B
Class Electrode min Voltage
Test Voltage
11. Workmanship and Finish
mm in. rms V
rms V
11.1 The sheeting shall be free of harmful physical irregu-
00 76 3 10 000 13 000
larities, which can be detected by a thorough test or inspection.
0 76 3 20 000 35 000
1 76 3 40 000 60 000
11.1.1 Harmfulphysicalirregularitiesmaybedefinedasany
2 152 6 50 000 70 000
feature that disrupts the uniform surface and represents a
3 203 8 60 000 80 000
potential hazard to the user, such as pinholes, cracks, blisters,
4 305 12 70 000 90 000
A
cuts, conductive imbedded foreign matter creases, pinch
These nominal clearances are intended to avoid flashover and may be
increased from the standard of 100 kPa (1 atm) barometric pressure and average
marks, voids (entrapped air), and prominent ripples.
humidity by no more than 51 mm (2 in.) when required by change in atmospheric
11.2 Nonharmful Irregularities—Surface irregularities or
conditions. These clearances may be decreased if atmospheric conditions permit.
B
imperfections may be present on all rubber sheeting due to
DC Proof Test voltages were determined using negative polarity.
inherentdifficultiesinthemanufacturingprocess.Theseirregu-
larities or imperfections may appear as indentations, protuber-
TABLE 4 Physical Requirements for Sheeting
ances, or imbedded foreign material that are acceptable pro-
Type I Type II
vided that:
Style A Style B Style B
11.2.1 The indentation or protuberance tends to blend into a
Tensile strength, min 4.83 (700) 4.83 (700) 4.83 (700)
smooth slope upon stretching of the material. The rubber
Mpa(psi)
thickness at any irregularity conforms to the thickness require-
Resistance to Accelerated 20 20 20
heat-aging, max. loss warp
ments.
A
and fill %
11.2.2 The rubber thickness at any irregularity conforms to
Bursting Strength, min, 1.72 (250) 1.72 (250) 1.72 (250)
Mpa (psi) the thickness requirements.
Tear Resistance, Min., N (lb)
11.2.3 Foreign material remains in place when the sheeting
Warp 1.3 (6) 1.3 (6) 1.3 (6)
is bent and stretches equally with the material surrounding it.
Fill 1.3 (6) 1.3 (6) 1.3 (6)
Low temperature No Cracking No Cracking No Cracking
B
12. Guarantee
Resistance
Puncture resistance, min 18 (100) 29 (150) 18 (100)
12.1 The manufacturer or supplier shall replace without
KN/m (lbf/in.)
Moisture absorption, max333 charge to the purchaser, unused sheeting which, at any time
C
Increase %
within a period of (12) months from date of initial delivery of
Flame resistance, Type II A
shipment to the purchaser or his/her designee, fails to pass the
Horizontal N/A N/A Self-Extinguishing
Vertical N/A N/A Pass
tests in this specification. The guarantee will be binding on the
D
Ozone resistance, Type II N/A N/A No Cracking
manufacturer or supplier only if the sheeting has been properly
Bent Loop
stored and has not been subjected to more than an original
Oil resistance, max, volume N/A N/A 4
E
Increase, % Type II B
acceptance test and one retest.
Elongation, min % 500 500 500
12.2 Any acceptance test made by the purchaser, or the
Tension set, max, mm (in.) 6.4 (0.25) 6.4 (0.25) 6.4 (0.25)
purchasers designee, shall be performed within the first two (2)
Drape Stiffness, max at 89 (3.5) 89 (3.5) 89 (3.5)
25°C (77°F), min (in.)
months of the guarantee period unless otherwise specified.
Drape Stiffness, max at 110 (4.5) 110 (4.5) 110 (4.5)
-10° (14°F), mm (in.)
NOTE 3—Proper storage means that the sheeting is stored without
Flex Stiffness, max at 0.028 (0.25) 0.028 (0.25) 0.028 (0.25)
distortion, and not stored directly above or in proximity to steam pipes,
25°C (77°F), N·m (in.·lbf)
radiators, or other sources of artificial heat, or exposed to direct sunlight
Flex Stiffness, max at 0.034 (0.30) 0.034 (0.30) 0.034 (0.30)
or sources of ozone. It is desirable that the ambient storage temperature
-10°C (14°F), N·m (in.·lbf)
not exceed 36°C (95°F).
A
70°C (158°F) for 7 days.
B
-40°C (-40°F) for 4 h.
13. Sampling
C
Distilled water 23°C (75°F).
D
50 pph for 3 h 40°C.
13.1 Each roll of sheeting in a lot or shipment shall be
E
ASTM Oil No. 2 room temperature for 24 h.
subject to inspection and test by the manufacturer including
electrical proof test to levels required in Table 2 or Table 3 and
proof-test (average value) specified inTable 3.The test voltage Sections 7, 9.1, 10, 11, and 15.
shall be applied continuously for at least 3 min.
9.2 The sheeting material, when tested between 50-mm (2
TABLE 5 Thickness Measurement
in.) disk electrodes with edges rounded to a radius of 6 mm
Thickness
Class
(0.25 in.), shall show a 60-Hz dielectric strength of not less
mm in.
than the value shown in Table 2, when tested in accordance
00 0.45 to 0.56 0.018 to 0.022
with 18.4.
0 0.75 to 1.02 0.030 to 0.040
1 0.90 to 1.50 0.035 to 0.059
10. Dimensions and Permissible Variations 2 2.40 to 3.20 0.094 to 0.126
3 2.80 to 3.60 0.100 to 0.142
10.1 Width—Standard width shall
...