ASTM F1742-96e1

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.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.
e1
Designation: F 1742 – 96
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.
e NOTE—Note 1 was added editorially in February 1999.
1. Scope 3.1.1 voltage, maximum use—the a-c voltage (rms) classi-
fication 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 d-c systems) to ground potential, the phase
if any, associated with its use. It is the responsibility of the user
(polarity on d-c systems) to ground potential shall be consid-
of this standard to establish appropriate safety and health
ered to be the 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
This specification is under the jurisdiction of ASTM Committee F-18 on
the maximum voltage at which sheeting shall be used is shown
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.
6 5.1.1 The class designation shall be based on the electrical
Available from American National Standards Institute, 11 West 42nd St., 13th
Floor, New York, NY 10036. properties as shown in Table 2 or Table 3.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
F 1742
TABLE 1 Proof Test/Use Voltage Relationship TABLE 4 Physical Requirements
Tensile strength, min, MPa (psi) 2600
NOTE 1—The a-c 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
Class of Insulating A-C Proof-Test D-C Proof-Test 20°F
A
Voltage Phase-
−7°C
Sheeting Voltage, rms V Voltage, avg V
Phase a-c 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 a-c proof-test voltage-2000.
(unused) shall withstand the 60-Hz a-c proof-test voltage (rms
value) specified in Table 2 or the d-c proof-test voltage (avg
TABLE 2 A-C Voltage Requirements
value) specified in Table 3. The test voltage shall be applied
Dielectric
Electrode Clearances
Proof Test
continuously for 1 min.
A Breakdown Test
Min
Class Voltage
Voltage 9.2 The sheeting material when tested between 51-mm
rms V
mm in.
rms V
(2-in.) disk electrodes with edges rounded to a radius of 6 mm
0 76 3 5000 10 000
(0.25 in.), shall show a 60-Hz dielectric strength of not less
1 76 3 10 000 20 000
than the requirements shown in Table 2 or Table 3 for the
A
These nominal clearances are intended to avoid flashover and may be
thickness of each individual specimen.
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
conditions. These clearances may be decreased if atmospheric conditions permit.
10. Dimensions and Permissible Variations
10.1 Width—Standard widths shall be 1220 6 25 mm (48 6
TABLE 3 D-C Voltage Requirements
1 in.). Other widths may be negotiated with the manufactur-
Dielectric
Electrode Clearances
Proof Test er.Table 4
A Breakdown
Min
Class Voltage
10.2 Thickness—The thickness of the sheeting shall be as
Test Voltage
avg V
mm in.
avg V
specified in Table 5.
0 76 3 8500 17 000
1 76 3 17 000 44 000
11. Workmanship and Finish
A
These nominal clearances are intended to avoid flashover and may be
11.1 The sheeting shall be smooth and uniform and free of
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
harmful physical irregularities, which can be detected by a
conditions. These clearances may be decreased if atmospheric conditions permit.
thorough test or inspection.
11.1.1 Nonharmful Irregularities—Flow marks may be
6. Ordering Information
present on all PVC sheeting due to inherent difficulties in the
6.1 Orders for PVC insulating sheeting under this specifi-
manufacturing process. These irregularities may appear as
cation should include the following information:
waves in the sheeting which are acceptable provided that the
6.1.1 Class,
sheeting thickness at any irregularity conforms to the thickness
6.1.2 Thickness,
requirements of Table 5.
6.1.3 Width, and
12. Guarantee
6.1.4 Length.
12.1 The manufacturer or supplier shall replace, without
7. Manufacture and Marking
charge to the purchaser, unused sheeting which at any time
7.1 The insulating sheet shall consist of a clear PVC
within a period of nine months from date of initial delivery of
compound with a smooth, polished finish on each surface.
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
12.2 Any acceptance test made by the purchaser or the
8.1 Insulating sheeting shall conform to the physical re-
purchaser’s designee, shall be performed within the first two
quirements in Table 4.
months of the guarantee period unless otherwise specified.
8.2 PVC insulating sheeting should remain flexible for use
through normal temperature ranges.
TABLE 5 Thickness Measurements
8.3 PVC insulating sheeting is clear but may be tinted to aid
Thickness Tolerance
in visual identification.
Class
mm in. mm in.
0 1.02 0.040 0.12 60.005
9. Electrical Requirements
1 1.02 0.040 0.12 60.005
9.1 The entire length of each roll of sheeting when new
F 1742
NOTE 2—Proper storage means that the sheeting is stored without
15. Packaging
distortion and not stored directly above or in proximity to steam pipes,
15.1 Sheeting shall be packaged in rolls and shall not be
radiators, or other sources of artificial heat, or exposed to direct sunlight.
distorted mechanically.
It is desirable that the ambient storage temperature shall not exceed 65°C
(150°F).
16. Thickness Measurements
13. Sampling
16.1 Thickness measurements should be made on complete
13.1 Each roll of sheeting in a lot or shipment shall be
sheeting samples with a caliper graduated to within 0.03 mm
subject to inspection and test by the manufacturer including
(0.001 in.). At least five thickness measurements shall be made
electrical proof test to levels required in Table 2 or Table 3 of
at selected points uniformly distributed over the test area of the
this specification.
sheeting.
13.2 An original sample of sufficient material shall be cut
TEST METHODS
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
17. Sequence of Testing
quantity of material produced by a common manufacturing
17.1 The follo
...