ASTM F1742-96(2000)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 1742 – 96 (Reapproved 2000)
Standard Specification for
PVC Insulating Sheeting
This standard is issued under the fixed designation F 1742; 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.
1. Scope 3.1.1 voltage, maximum use—the ac voltage (rms) classifi-
cation of the protective equipment that designates the maxi-
1.1 This specification covers acceptance testing of Poly
mum nominal design voltage of the energized system that may
Vinyl Chloride insulating sheeting for use as a covering for
be safely worked. The nominal design voltage is equal to
protection of workers.
phase-to-phase voltage on multiphase circuits.
1.2 The following safety hazards caveat applies only to the
3.1.1.1 Discussion—If there is no multiphase exposure in a
test method portion, Sections 17-19, of this specification: This
system area, and the voltage exposure is limited to phase
standard does not purport to address all of the safety concerns,
(polarity on dc systems) to ground potential, the phase (polarity
if any, associated with its use. It is the responsibility of the user
on dc systems) to ground potential shall be considered to be the
of this standard to establish appropriate safety and health
nominal design voltage.
practices and determine the applicability of regulatory limita-
3.1.2 Discusssion—If electrical equipment and devices are
tions prior to use.
insulated, or isolated, or both, such that the multiphase expo-
2. Referenced Documents sure on a grounded wye circuit is removed, then the nominal
design voltage may be considered as the phase-to-ground
2.1 ASTM Standards:
voltage on that circuit.
D 149 Test Method for Dielectric Breakdown Voltage and
3.1.3 voltage, nominal design—a nominal value consistent
Dielectric Strength of Solid Electrical Insulating Materials
with the latest revision of ANSI C84.1, assigned to the circuit
at Commercial Power Frequencies
or system for the purpose of conveniently designating its
D 412 Test Methods for Vulcanized Rubber and Thermo-
voltage class.
plastic Rubbers and Thermoplastic Elastomers— Tension
D 570 Test Method for Water Absorption of Plastics
4. Significance and Use
D 747 Test Method for Apparent Bending Modulus of
4.1 This specification covers the minimum electrical and
Plastics by Means of a Cantilever Beam
physical properties guaranteed by the manufacturer and the
D 1004 Test Method for Initial Tear Resistance of Plastic
detailed procedures by which such properties are to be deter-
Film and Sheeting
mined. The purchaser may at his option perform or have
D 1048 Specification for Rubber Insulating Blankets
performed any of these tests in order to verify the guarantee.
D 1746 Test Method for Transparency of Plastic Sheeting
Claims for failure to meet the specification are subject to
D 2240 Test Method for Rubber Property—Durometer
verification by the manufacturer.
Hardness
2.2 American National Standard:
NOTE 1—This material is intended for a single use application.
ANSI C84.1 Voltage Ratings for Electric Power Systems
4.2 The safe and proper field use of PVC sheeting is beyond
and Equipment (60 Hz)
the scope of this specification.
4.2.1 When authorizing use of PVC sheeting for personal
3. Terminology
protection, a margin of safety should be allowed between the
3.1 Definitions:
maximum voltage at which it is used and the proof-test voltage
at which it is tested. The relationship between proof-test and
the maximum voltage at which sheeting shall be used is shown
This specification is under the jurisdiction of ASTM Committee F18 on
Electrical Protective Equipment for Workers and is the direct responsibility of
in Table 1.
Subcommittee F18.25 on Insulating Cover-Up Equipment.
Current edition approved Nov. 10, 1996. Published January 1997.
5. Classification
Annual Book of ASTM Standards, Vol 10.01.
Annual Book of ASTM Standards, Vol 09.01. 5.1 PVC insulating sheeting covered under this specification
Annual Book of ASTM Standards, Vol 08.01.
shall be designated as Class 0 or Class 1.
Annual Book of ASTM Standards, Vol 10.03.
5.1.1 The class designation shall be based on the electrical
Available from American National Standards Institute, 11 West 42nd St., 13th
properties as shown in Table 2 or Table 3.
Floor, New York, NY 10036.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
F 1742 – 96 (2000)
TABLE 1 Proof Test/Use Voltage Relationship TABLE 4 Physical Requirements
Tensile strength, min, MPa (psi) 2600
NOTE 1—The ac voltage (rms) classification of the protective equip-
Elongation, min, % 300
ment designates the maximum nominal design voltage of the energized
A
Moisture absorption, max increase, % 0.30
system that may be safely worked. The nominal design voltage is equal to:
Hardness, max shore A 90
B
(a) The phase to phase on multiphase circuits, or
Specular transmission, min, % 75
(b) The phase to ground voltage on single phase grounded circuits. Tear resistance, min, lbf/in. 575
Stiffness, max, psi 25 000
Maximum Use
20°F
Class of Insulating AC Proof-Test DC Proof-Test
A
Voltage Phase-
Sheeting Voltage, rms V Voltage, avg V −7°C
Phase ac rms, max
Puncture resistance, min, lbf/in. 900
0 1000 5000 8500
A
1 7500 10 000 17 000 Distilled water − 23°C (75°F).
B
550 nm.
A
Except for class 0 equipment, the maximum AC use voltage is based on the
following formula: Maximum use voltage (maximum nominal design volt-
age) = 0.95 ac proof-test voltage-2000.
9. Electrical Requirements
TABLE 2 AC Voltage Requirements
9.1 The entire length of each roll of sheeting when new
Dielectric (unused) shall withstand the 60-Hz ac proof-test voltage (rms
Electrode Clearances
Proof Test
A
Breakdown Test
Min
value) specified in Table 2 or the dc proof-test voltage (avg
Class Voltage
Voltage
rms V
value) specified in Table 3. The test voltage shall be applied
mm in.
rms V
0 76 3 5000 10 000
continuously for 1 min.
1 76 3 10 000 20 000
9.2 The sheeting material when tested between 51-mm
A
These nominal clearances are intended to avoid flashover and may be
(2-in.) disk electrodes with edges rounded to a radius of 6 mm
increased from the standard of 100 kPa (1 atm) barometric pressure and average
(0.25 in.), shall show a 60-Hz dielectric strength of not less
humidity by no more than 51 mm (2 in.) when required by change in atmospheric
conditions. These clearances may be decreased if atmospheric conditions permit. than the requirements shown in Table 2 or Table 3 for the
thickness of each individual specimen.
TABLE 3 DC Voltage Requirements
10. Dimensions and Permissible Variations
Dielectric
Electrode Clearances
Proof Test
A
Breakdown
Min 10.1 Width—Standard widths shall be 1220 6 25 mm (48 6
Class Voltage
Test Voltage
avg V
1 in.). Other widths may be negotiated with the manufactur-
mm in.
avg V
0 76 3 8500 17 000 er.Table 4
1 76 3 17 000 44 000
10.2 Thickness—The thickness of the sheeting shall be as
A
These nominal clearances are intended to avoid flashover and may be
specified in Table 5.
increased from the standard of 100 kPa (1 atm) barometric pressure and average
humidity by no more than 51 mm (2 in.) when required by change in atmospheric
11. Workmanship and Finish
conditions. These clearances may be decreased if atmospheric conditions permit.
11.1 The sheeting shall be smooth and uniform and free of
harmful physical irregularities, which can be detected by a
6. Ordering Information thorough test or inspection.
11.1.1 Nonharmful Irregularities—Flow marks may be
6.1 Orders for PVC insulating sheeting under this specifi-
present on all PVC sheeting due to inherent difficulties in the
cation should include the following information:
manufacturing process. These irregularities may appear as
6.1.1 Class,
waves in the sheeting which are acceptable provided that the
6.1.2 Thickness,
sheeting thickness at any irregularity conforms to the thickness
6.1.3 Width, and
requirements of Table 5.
6.1.4 Length.
12. Guarantee
7. Manufacture and Marking
12.1 The manufacturer or supplier shall replace, without
charge to the purchaser, unused sheeting which at any time
7.1 The insulating sheet shall consist of a clear PVC
compound with a smooth, polished finish on each surface. within a period of nine months from date of initial delivery of
shipment to the purchaser or his designee, fail to pass the tests
7.2 Each piece of sheeting shall be marked clearly and
in this specification. This guarantee will be binding on the
permanently at a maximum interval of1m(3ft) with the name
manufacturer or supplier only if the sheeting has been properly
of the manufacture or supplier, ASTM D and class.
stored and has not been subjected to more than an original
acceptance test and one retest.
8. Physical Requirements
8.1 Insulating sheeting shall conform to the physical re-
quirements in Table 4.
TABLE 5 Thickness Measurements
8.2 PVC insulating sheeting should remain flexible for use
Thickness Tolerance
Class
mm in. mm in.
through normal temperature ranges.
0 1.02 0.040 0.12 60.005
8.3 PVC insulating sheeting is clear but may be tinted to aid
1 1.02 0.040 0.12 60.005
in visual identification.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
F 1742 – 96 (2000)
12.2 Any acceptance test made by the purchaser or the or the supplier’s request. Those sheets punctured when tested
purchaser’s designee, shall be performed within the first two in accordance with 9.1 or 9.2, however, shall be stamped,
months of the guarantee period unless otherwise specified. punched, or cut prior to being returned to the supplier to
indicate that they are unfit for electrical use.
NOTE 2—Proper storage means that the sheeting is stored without
distortion and not stored directly above or in proximity to steam pipes,
15. Packaging
radiators, or other sources of artificial heat, or exposed to direct sunlight.
It is desirable that the ambient storage temperature shall not exceed 65°C
15.1 Sheeting shall be packaged in rolls and shall not be
(150°F).
distorted mechanically.
13. Sampling
16. Thickness Measurements
13.1 Each roll of sheeting in a lot or shipment shall be
16.1 Thickness measurements should be made on complete
subject to inspection and test by the manufacturer including
sheeting samples with a caliper graduated to within 0.03 mm
electrical proof test to levels required in Table 2 or Table 3 of
(0.001 in.). At least five thickness measurements shall be made
this specification.
at selected points uniformly distributed over the test area of the
13.2 An original sample of sufficient material shall be cut
sheeting.
from the end of a roll or rolls selected from the lot for the test
requirements of Sections 9and 8. A lot is defined as that
TEST METHODS
quantity of material produced by a common manufacturing
process during a consecutive time period not to exceed 24 h. If 17. Sequence of Testing
failure occurs in the first sample, a second sample of the same
17.1 The following order of procedure is suggested for
quantity shall be selected and tested.
testing PVC insulating sheeting.
17.1.1 Inspection of the surfaces in accordance with Section
14. Rejection
11.
14.1 Individual rolls shall be rejected if they fail to meet the
17.1.2 The dimensions in accordance with Sections 10 and
manufacturing and marking requirements of Section 7, the
16.
electrical requirements of 7, the width requirements of 10.1,
17.1.3 Electrical proof test in accordance with the appropri-
the minimum thickness requirements of 10.2, or the workman-
ate paragraphs of Section 18.
ship requirements of Section 11.
17.1.4 Breakdown voltage test in accordance with the ap-
14.2 The entire lot or shipment of sheeting shall be rejected
propriate paragraphs of Section 18.
under any of the following conditions:
17.1.5 Physical property tests in accordance with 19.
14.2.1 If 5 % or more, but not less than two rolls of the
sheeting in a shipment fail to meet the requirements of 9.1.
18. Electrical Tests
14.2.2 If two dielectric breakdowns that do not meet the
18.1 Conditioning— Prior to testing, the sheeting shall be
dielectric strength value specified in 9.2 occur in five tests on
placed in a flat position.
the specimen.
NOTE 3—Precaution: It is recommended that the test apparatus be
14.2.3 If one dielectric breakdown of five tests on the
designed to afford the operator full protection in the performance of his
original and one or more dielectric breakdowns of five tests on
duties. Reliable means of deenergizing and grounding the high-voltage
an additional specimen fail to meet the dielectric strength value
circuit should be provided.
specified in 9.2.
18.2 AC Proof Test:
14.3 The testing shall be terminated and the manufacturer or
18.2.1 Electrodes—Where electrodes are to be employed as
supplier notified if, during the course of testing, 5 % or more,
part of the test apparatus, they shall be of such design so as to
but not less than two rolls, of the sheeting in a lot or shipment,
apply the electrical stress uniformly over the test area without
fail to meet the requirements of 9.1 or 9.2 as determined by the
producing mechanical strain in the material. The electrodes
rejection criteria of 14.1, 14.2, 14.2.1, 14.2.2 or 14.2.3. The
used in proof tests shall be of such dimensions that the
manufacturer or supplier may in such a case require the
flashover clearances specified in Table 2 are not exceeded. A
purchaser to submit proof that the test procedure and equip-
satisfactory procedure for ac proof testing utilizes electrodes
ment conform to the appropriate paragraphs of Section 18.
that will provide intimate contact without undue pressure.
When such proof has been furnished, the manufacturer or
supplier may request that his representative witness the testing
NOTE 4—Rectangular metal sheets approximately 3-mm (0.06-in.)
of additional rolls from the shipment.
thick, having smoothly rounded edges and corners, have been found to be
satisfactory for this purpose. Also satisfactory are wet felt or sponge-top
14.4 The entire lot or shipment of sheeting may be rejected
electrodes. Test platens made from grade 316L stainless steel 100 mesh
at the option of the purchaser if two of the five specimens
screen material is also acceptable.
tested f
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