The compound shall contain no more than 0.5 % of free sulfur by weight when tested as specified in Section 17.. Tensile Strength and Elongation 5.1 The tensile strength of the tape, when
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k
AMERICAN SOCIETY FOR TESTING AND MATERIALS
1016 R a a St Phllid*lphla Pa., 10103
Reprinted Irom lhe Annurl Book of ASTM Strndrrdr Copyright ASTM
If not listed in the curnnt combined Index will a w r r in the next &¡tion
Standard Specification for
LOW-VO LTAGE RUB BER IN SU LAT I NG TAPE'
This standard is issued under the fixed designation D 119; the number immediately following the designation indicates the year of onginal adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year
of last reapproval
This s ecification has been approved for use by agencies o f the Department of Defense and for listing in the DoD Index of
Specikaiions and Standarb
1 scope
1.1 This specification covers low-voltage
rubber insulating tape designed for splicing
electrical wires and cables operating up to
2000 volts phase to phase in dry locations
with conductor temperatures up to 75°C
(167°F) for continuous operation, to 95°C
(203°F) for emergency overload conditions,
and to 150°C (302°F) for short circuit condi-
tions This tape is suitable for outdoor use,
but must be overwrapped to protect from
ozone attack and from ultraviolet radiation
This tape may be applied under an ambient
temperature range of -10°C (+14"F) to
+ 40°C ( 104°F)
2 Applicable Documents
2.1 ASTM Standards:
D 149 Tests for Dielectric Breakdown Volt-
age and Dielectric Strength of Electrical
Insulating Materials at Commercial
Power Frequencies2
D297 Chemical Analysis of Rubber Prod-
ucts3
D 41 2 Tests for Rubber Properties in Ten-
sion4
D 470 Testing Thermosetting Insulated and
Jacketed Wire and Cable5
3 Compound
3.1 The tape shall consist of an unvulcan-
ized or partially vulcanized rubber insulating
compound The compound shall contain no
more than 0.5 % of free sulfur by weight
when tested as specified in Section 17 The
compound shall be well, evenly and smoothly
processed, cut to the specified widths and
tightly wound in rolls with a separator be- tween layers
4 Separator
4.1 The separator shall be parchment pa- per, glazed or plastic sheeting, or any suitable material interposed between adjacent layers The removable or nonremovable separator shall not interfere with the use of the roll during application Where a removable sepa- rator is used, the separator shall not show any undue tendency to stick to the rubber or to ravel The outside end of the roll shall be securely fastened
5 Tensile Strength and Elongation 5.1 The tensile strength of the tape, when tested as specified in Section 18 shall be not less than 1.7 MPa (250 psi)
5.2 The elongation of a 50-mm (2-in ) gage length determined simultaneously with the tensile strength test, shall be not less than
300 %
6 Dielectric Strength
6.1 The dielectric strength of the tape, when tested as specified in Section 19, shall
be not less than 14 kV/mm (350 V/mil) of thickness
'This specification is under the 'urisdictjon of the
ASTM Committee D-9 on Electrical jnsulating Materials and is the direct responsibility of Subcommittee D09.18 on
Elastomeric Insulation on Cables
Current edition approved Nov 24, 1978 Published January 1979 On 'naU published as D119-21 T Last previous edition D C9-A
a Annual BooKofASTM StandardF, Part 39
Annual Book ofASTM Srondnrdi, Part 37
'Annual Book ofASTM Standards, Parts 37and 38 'Annual Book ofASTM S- , Part 40
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
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4CIb
D 119
7 Fusion
specified in Section 20
8 Heat Resistance
test as specified in Section 21
9 Dimensions
9.1 The tape shall conform to the following
nominal dimensions when tested as specified
in Section 22:
Width Thickness Length
20 0.75 0.80 0.030 9.1 10
25 1.00 0.80 0.030 9.1 10
40 1.50 0.80 0.030 9.1 10
7.1 The tape shall meet the fusion test as
8.1 The tape shall meet the heat resistance
mm in m m in m Yd
Millimetre and inch values, and metre and
yard values are nominal and not equivalent
Other widths, thicknesses and lengths may be
supplied as agreed between the purchaser and
the supplier
10 Permissible Vanations in Dimension
10.1 The average thickness shall not vary
from the nominal thickness more than 20.08
mm (+r0.003 in.) and the average width not
more than 20.08 mm (20.003 in.) and the
length of the rolls in any sampling shall be no
less than the nominal length No individual
thickness shall vary from the nominal thick-
ness more than 2 1 3 % and no individual
width shall vary more than k 1 5 mm (+0.06
in ) U S customary units are referee
11 Sampling
11.1 Sample rolls shall be taken at random
from each shipment as specified in the follow-
ing table:
Number of R o b in Shipment Number of Sample Rolls
201 to 500 3
501 to 1000 4
1001 to 5000 5
For shipments in excess of 5000 rolls, one
additional roll shall be taken for each addi-
tional 1000 rolls or fraction thereof
11.2 A shipment shall consist of material
shipped or intended for shipment to a pur-
chaser and covered by one bill of lading
11.3 Each sample roll shall be tested for
conformance to all requirements of the spec- ification
11.4 At least 610 mm (24 in.) of the outer layer of each sample roll shall be removed and discarded before taking test specimens
11.5 The test specimen shall be unwound from the roll at a slow uniform rate without jerking
12 Inspection
12.1 Inspection of the material shall be made as agreed upon by the purchaser and seller as part of the purchase contract
12.2 If it is required, the tape shall be tested and inspected either at the place of manufacture prior to shipment or at the place of delivery within 4 weeks from date of delivery
13 Aging and Storage 13.1 The tape shall at any time within eight months after acceptance, if properly stored, meet the fusion test as specified in Section 20, and shall not become unduly attached to any removable separators
13.2 Tape, to be properly stored, shall be stored in the original cartons and preferably
in a cool location Tape shall not be stored in close proximity to steam pipes, radiators, or other sources of heat
13.3 In unvulcanized types, the tape must release easily for application and be able to pass the fusion test of Section 20 after the roll has been aged at 40°C for 60 days This
is a performance test and is to be conducted
by the manufacturer when any change is made The manufacturer shall submit a copy
of the test results when requested by any purchaser This test is not required for par- tially vulcanized tapes
14 Rejection and Retests 14.1 The purchaser reserves the right to reject any part of the shipment that does not comply with Section 15
14.2 The purchaser reserves the right to reject a shipment from which two or more sample rolls fail to meet the requirements of any individual test or measurement pre- scribed in these specifications, without addi- tional sampling If only one sample roll fails
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4CTb
an individual test a second set of samples
shall be taken as specified in Section 11 and
all rolls in the second sampling shall be
subjected to that test or measurement
wherein the failure occurred The purchaser
reserves the right to reject the shipment if
the second sampling fails to conform with
the applicable requirement
14.3 The manufacturer shall replace re-
jected tape and shall pay freight charges for
the return of such material
15 Packaging and Marking
15.1 Each roll of tape shall be enclosed in
a paper carton, unless otherwise specified If
enclosed in a carton, either the roll of tape
shall be wrapped in a moisture-proof mate-
rial, or the carton shall be wrapped in a
moisture-proof material and sealed The
wrapping of the tape or carton shall be
secure and shall protect the contents fully
15.2 Each carton shall be marked with
the name of the manufacturer or trade mark,
the month and year of manufacture, and the
nominal width, thickness, and length of the
tape
TEST METHODS
16 Room Temperaîure
16.1 The temperature of the room in
which the tensile strength, elongation, and
fusion tests are made shall be 23 k2"C (73.4
I 3.6"F)
17 Free Sulfur Test
17.1 A chemical analysis for free sulfur
shall be made as specified in Section 28 of
Method D 297
18 Tensile Strength and Elongation Tests
18 l Perform the tests for tensile strength
and elongation as specified in Method D 412,
with the following exceptions:
18.1.1 The room temperature shall be as
specified in Section 16
18.1.2 Cut the test specimens from a sin-
gle-ply sample
18.1.3 Use the dumbbell-shaped test
specimen and cut with the ASTM standard
die as shown in Fig 1 (Die A) of Method
D 412, except that the ends of the specimen
cut from a 20-mm (0.75-in.) tape need not
D 119
be full width In placing the parallel gage marks on the test specimen take care not to cut the stock
18.1.4 Test three specimens, free from visible defects, from each sample roll Re- port the average of the three tests
19 Dielectric Strength Test
19.1 Determine the dielectric strength by placing a specimen approximately 150 mm (6 in.) in length between two flat electrodes 6.4 mm (0.25 in.) in width by 108 mm (4.25 in.) in length with edges square and ends rounded to 3.2-mm (0,125-in.) radius (see Fig 1) The area of contact with the surface
of the tape specimen is 6.4 mm (0.25 in.) in width by 100 mm (4 in.) in length Under an electrode pressure of 7 kPa (1 psi), apply a 60-Hz voltage with a sine wave form as specified in 5.1 of Method D 149, at a value less than 1000 V and raise it at the rate of
500 V/s until puncture occurs In order to
prevent flashover, one may secure increased width by attaching to each side of the test specimen an added piece of tape, making a 3-mm (0.125-in.) lap seam carefully rolled down Other suitable means may be used such as sampling and testing from the master roll
20 Fusion Test
20.1 Spirally wrap a piece of tape while elongated to 200 2 20 % of its original length for a distance of approximately 150
mm (6 in.) around an Awg size 8 wire in such a manner that except for the ends, the tape shall be four layers deep Affix the end
of the tape to make a lap splice with the underlying tape and roll the specimen so formed between the palms of the hand Condition the specimen at a temperature of
23 I 2°C (73.4 iz 3.6"F) for a period of 24
h
20.2 The fused tape shall not show any evidence of unwinding or flagging
21 Heat Resisîance Test
21.1 Specimens shall be prepared as fol- lows: Butt-wrap the tape around a 50 to 75-
mm (2 to 3-in.) mandrel, for a distance of
125 to 150 mm (5 to 6 in.), with minimum elongation, taking care to reduce air space
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4Cb
between the adjacent layers to a minimum
Build the specimen to a four layer thickness
by applying the tape smoothly and evenly,
maintaining a 50 % overlay Support the
entire assembly in a circulating air oven for 7
days at 95°C (203°F)
21.2 After exposure to the conditions as
stated in 21 l, the specimen shall exhibit no
visual porosity, blisters, delamination, crack-
ing, or visible sag
22 Measurement of Thickness and Width
22.1 Determine the thickness of the tape
and separator by means of a micrometer
D 119
graduated to 0.02 mm (0.001 in.) and having
a presser foot 6.35 f 0.25 mm (0.25 i 0.01 in.) in diameter, exerting a total force of 2.5
2 0.03 N (10 A 0.1 ozf) Apply the load by means of a weight Determine the thickness
of the separator in a similar manner Con-
sider the thickness of the separator sub-
tracted from the thickness of the tape and separator to be the thickness of the tape Make five thickness and five width measure- ments at random in a length of not less than 0.9 m (1 yd) and the average of these five measurements shall be the average thickness and width specified in Section 9
Non-Adjust height of the top electrode so thai a preg9urc of 7 kPa is exerted on the s@m
PIG 1 DieiectrkStreythTest
The American Society for Testh and Mat& taka m r s @ n x t h g the v<ilidiiy o an eni rights asserted m
d an e x p d y ad&dtg d¿tmnhtwn of the
connceth with any &cm mentionetfin this standard Users o t h st
validity of any such patent rights, and the risk of i$ìingemení of such rights, is entùely their own ìwpdbw
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn Your comments are invited either for revision of this st&d or for aaWitìonal standards and should be addressed to ASTM Headquarters Your comments will receive careful comiakration
at a meeting of the responsible technical committee, which you may attend If you fel that your comments have not received
a fair hearing you should make your views known to the ASTM Committee on Standarak, 1916 Race St., Philade!phh, P a
19103 which will schedule a further hearing regarding your comments Failing satisfâction there, you may appd to the ASTM Board of Directors