This document provides specifications for PVC insulation and sheathing for electric cables. It outlines four types of PVC compounds for insulation (Types A, B, C) and two for sheathing (Types ST1, ST2). It lists various test requirements for the compounds, including tensile strength, elongation, heat deformation, heat shock, shrinkage, cold bend, cold impact, color fastness, thermal stability, bleeding, and water absorption. The tests are intended to ensure the compounds maintain adequate physical and electrical properties for use in electric cables operating at different voltage ratings and temperature classes.

1. Indian Standard
SPECIFICATION FOR
PVC INSULATION AND SHEATH OF
ELECTRIC CABLES
( First Revision )
Fourth Reprint JANUARY 1998
UDC 621.315.221.8:621.315.616.96[678.743.22]
BUREAU QP INDIAN BTANDARDI
MANAlL EHAVAN, 9 BAHADUR SHAH ZAPAR INAltO-
NEW DELHI 110002
s#pmbn 1984
( Reaffirmed 2001 )

2. IS : 5831.1984
Indian Standard
SPECIFICATION FOR
PVC INSULATION AND SHEATH OF
ELECTRIC CABLES
( First Revisiop )
Power Cables Sectional Committee, ETDC 59
Chairman
SEIRI M. L. DON~RE
M-3, Satyam,
88, Sion Circle, Bombay
Members
SHRI J. P. ANAL
SHRI B. P. RAI ( Alternate)
SHRI M. R. BEAT
SHRI D. K. BASU ( Alternate )
Represent&g
Bharat Heavy Electricals Ltd, Hyderabad
Tata Consulting Engineers, Bombay
CHIEF ENGINEER ( ELECTRICAL ) I Central Public Works Department, New Delhi
S U R V E Y O R o F WORKS
( ELECT ) V ( Alternate )
DR K. DAS GUPTA Calcutta Electric Supply Corporation ( India )
Ltd, Calcutta
SHRI P. NEOQI ( Alternate )
DIRECTOR
SHRI M. C. RATRA (Alternate )
D IRECTOR OR M I N E S SAFETY
( ELECT ) ( HQ )
DIRECTOR OF, MINES SAFZTY
( ELECT ) ( Alternate )
SHRI RAVI K. DU T T
Central Power Research Institute, Bangalore
Directorate General of Mines Safety, Dhanbad
SHRI S. R. SARAN ( Alternate )
Cable and Conductor Manufacturers’ Association
of India, New Delhi
SIIRI P. Grrosu Indian Cable Co Ltd, Jamshedpur
Cable Corporation of India Ltd, Bombay
SHRI K. V. R. Rao ( Alternate )
SHRI M. M. H~NAVAR
SIIRI S. R. PAUMAN~BHAN ( Alternate J
SI~I D. K. JAIN Directorate of Technical Development & Produc-
tion ( Air ), New Delhi
SIII~I V. K. Snanaa~ ( Alternate )
SIII<I K. S. Josrrr Bombay Suburban Electric Supply Ltd, Bombay
Srirtr R. K. Ssaoa~ ( Alternate )
( Continued on page 2 )
@ CoPYright 1984
BUREAU OF INDIAN STANDARDS
This publication is protected under the Indian Copyright Act (XIV of 1957 ) and
reproduction in whole or in part by any means except with written permission of the
publisher shall be deemed to be an infringement of copyright under the said Act.

3. IS:!X?l- 1984
( Continuedfrom page 1 )
Members Representing
SHRI S. L. KA K R A R Universal Cables Ltd, Satna
SHRI R. C. AQRAWAL ( Alternate )
SHRI R AJ K. MI T A L Delhi Electric Supply Undertaking, New Delhi
SHRI V. K. SAEHUJA (Alternate )
SHRI R. V. NARAYANAN Directorate General of Supplies & Disposals
SHRI D. R. CHANDRA ( Altevuzte )
( Inspection Wing ), New Delhi
SHRI H. M. PAI The Federation of Electricity Undertakings of
India, Bombay
SEEIMATI C. BALI~A ( Alternate )
SHRI S. N . PARWAL The Premier Cable Co Ltd, Eranakulam
( Kerala )
SHRI A. K. RA~AN Asian Cables Corporation Ltd, Bombay
SHRI S. M. SAEHALKAR Bombay Electric Supply & Transport Under-
taking, Bombay
SHRI S. V. UPASANI ( Alternate )
SHRI L. K. SAN~HI Fort Gloster Industries Ltd, Howrah
SHRI A. S. BZIATTACHARJEE ( Alternate )
LT-COL S. R. SEN Controllerate of Inspection Electronics, Bangalore
SHRI S. K. MALHOTRA C Alternate )
DR M. S. SUKIIIJA Punjab Research Institute, Rajpura
SHRI U. S. VERMA National Test House, Calcutta
SRRI R. RAI~AERISIXNA ( Alternate )
SHRI K. G. WARRIER Oriental Power Cables Ltd, Kota
SHRI B. K. MUNDHRA ( Alternafc)
SHRI S. P. SAC~DEV, Director General, IS1 ( Ex-o&id Mumber )
Director ( Elec tech )
Secretary
SHRI K. M. BHATIA
Senior Deputy Director ( Elec tech ), IS1
Panel for Elastomeric and Thermoplastic Cables, ETDC 59/P4
Convener
SlsRIL.K.SANQHI
Members
Fort Gloster Industries Ltd, Howrah
SHRI A. S. BHATTACHARJEE ( Alternale to
Shri L. K. Sanghi )
SHRI B. ROY CHOWDHURY The Calcutta Electric Supply Corporation
( India ) Ltd, Calcutta
SHRI P. NEO~I ( Alternate )
SHRI P. GHOSR Indian Cable Co Ltd, Jamshedpur
SHRI K. V. R. RAO (Alternate )
SHRI M. M. HONAVAR Cable Corporation of India Ltd, Bombay
SRRI S. R. PADMANABHAN ( Alternate )
SHRI S. L. KAKKAR Universal Cables Ltd, Satoa
SHRI R. C. AORAWAL ( Altsmafe )
SHRI J. V. MEHTA The Ahmedabad Electricity Co Ltd, Ahmadabad
SHRI B. K. MIJNDHRA Oriental Power Cables Ltd, Kota
SHRI A. S. PINTO Delhi Electricity Supply Undertaking, New Delhi
SHRI S. R. SARAN Industrial Cables ( India ) Ltd, Rajpura
2

4. IS:5831-1984
Indian Standard
SPECIFICATION FOR
PVC INSULATION AND SHEATH OF
ELECTRIC CABLES
( First Revision)
0. FOREWORD
0.1 This Indian Standard ( First Revision ) was adopted by the Indian
Standards Institution on 30 April 1984, after the draft finalized by the
Power Cables Sectional Committee had been approved by the Electro-
technical Division Council.
0.2 This standard was originally published in 1970 with d view to bring
under a single cover the various requirements for PVC insulation and
sheath of different types of cables.
0.3. This revision has been undertaken to update it in the li~llt of further
experience and developments and to align with international practice,
where appropriate. Details about methods of test have been, by and large,
taken out from this standard and are now covered in a separate standard,
to which reference has been made at appropriate places.
U.4 This standard is complementary to the individual specification for
different types of cables.
0.5 In preparing this standard, considerable assistance has been derived
from IEC Publication 502 ( 1983 ) ‘ Extruded solid dielectric insulated
power cables for rated voltages from 1 kV up to 30 kV ‘, issued by the
International Electrotechnical Commission ( IBC ) .
0.6 For the purpose of deciding whether a particular requirement of this
standard is complied with, the final value, observed or calculated, expres-
sing the result of a test shall be rounded off in accordance with IS : 2-1960*.
The number of significant places retained in the rounded off value should
be the same as that of the specified value in this standard.
*Rules for rounding off numerical values ( revised ).
3

5. IS : 5831. 1984
1. SCOPE
1.1 This standard specifies the physical and electrical requirements for
PVC insulation and sheath of electric cables.
1.2 The types of PVC compounds covered by this standard are given
below:
Type A General purpose insulation for maximum rated conductor
temperature 70°C intended for cables with rated voltages
U,/U up to and including 3.313.3 kV.
Type B General purpose insulation for maximum rated conductor
temperature 7OW intended for cables with rated voltages
U,/U above 3-313.3 kV.
Type C Heat resisting insulation for maximum rated conductor
temperature 85°C intended for cables with rated voltages
up to and including 1 100 volts.
Type ST1 General purpose sheath intended for use in cables oper-
ating at a maximum rated conductor temperature 70°C.
Type ST2 Heat resisting sheath intended for use in cables oper-
ating at a maximum rated conductor temperature 90°C.
2. TERMINOLOGY
2.0 For the purpose of this standard, the definitions given in IS : 1885
( Part 32 )-1971* shall apply, in addition to the following.
2.1 Variation - Difference between the median value obtained after
ageing and the median vaIue obtained without ageing, expressed as a
percentage of the latter.
3. COMPOSITION
5.1 The insulation or sheath shail consist of a compound based on one of
the following materials, which have been suitably compounded and pro-
cessed to meet the requirements of this standard:
a) Polyvinyl chloride ( PVC ),
b) Suitable co-polymers of which the major constituent shall be vinyl
chloride,
c) Mixture of (a) and (b).
4. TEST REQUIREMENTS
4.1 The insulation and sheath shall satisfy the test requirements stated in
Tables 1 and 2 respectively, to the extent specified in the relevant cable
standard.
+Electrotechnical vocabulary : Part 32 Cables, conductors and accessories for electric
SUPPlY -
4

6. IS : 5831 - 1984
TABLE 1 TEST REQUIREMENTS FOR PVC INSULATION
( c1uusc 4.1 )
SL TEST UNIT TYPE OF INSULATION METHOD
No. ~~~~~h~_~~~~ OB TEST
A B C
~zz?G:.
OB IS:
10810+ )
(1) (2)
i) Volume resistivity, Min
a) at 27°C ($81 Note 1 )
b) at maximum rated
temperature ( ice 1.2 )
ii) Insulation resistance cons-
tant, Min
a) at 27*C ( see Note 1 )
b) at maximum rated
temperature ( se.9 1.2 )
iii) Without ageing
a) Tensile strength, Min
b) Elongation at break,
Min
iv) After ageing in air oven
f Tempera-
1 ture (tole-
a) Treatment { rance
I rt2”C)
[Duration
b) Tensile strength
1) gfiue after ageing,
2) Variation, Max
c) Elongation at break
1) Vr&ue after ageing,
2) Variation, Max
v) Loss of mass in air oven
[Tempera-
1 tllre ( tole-
a) Treatment{ rance
I ,!:,:I2.
(3) (4) (5)
Ohm-cm 1 x 10’3 1 x 1014
Ohm-cm 1 x 10’0 I x 1011
MQkm 36’7 367
MS&km 0.037 0’37
N/mms 12’5 12.5
percent 150 135
“C 80 100
days
N/mm*
percent
7 7
12’5 12’5 12’5
f 20 f 25 f 25
percent
percent
“C
days
150
f 20
80
7
125
f 25
-
-
(6) (7)
43
1 x 10’s
I x 1010
43
36.7
0.037
7
12’5
125
II
135
7
125
* 35
10
-
-
( conrirmd )
5

7. ISr!ml-1984
TABLE I TEST REQUIREMENTS FOR PVC INSULATION - Contd
SL TEST UNIT TYPE OB INEIULATJON METHOD
No. F-_-h_---~ OF TEST
A B C ( REB TO
PABT No.
OP IS :
108105 )
(1) (2)
vi) Hot deformation test
Test temperature
( tolerance f 2°C )
Time under load ( MC
Note 2 )
First case
Second case
Depth of indentation,
Max
vii) Heat shock test
r Tempera-
I ture (tole-
a) Treatment{ rance
I *2”c)
[Duration
b) Visual examination
viii) Shrinkage test
r Tempera-
) ture ( tole-
a) Treatment { rance
I f 2°C)
LDuration
b) Shrinkage, Max
ix) Cold bend test
(for diameter < 12’5 mm)
a) Test temperature ( tolc-
rancc * 2°C )
b) Visual examination
x) Cold impact trst ( for dia-
meter > 12.5 IllIn )
a) Test t?mpt’rature ( tole-
rance f 2% )
b) Visual examination
(3)
“C
hours
hours
percent
“C
hour
-
“C
minutes
percent
“C
“C
-
(4) (5) (6) (7)
15
80 80 95
4 - -
6 6 6
50 50 50
14
150 150 150
I I 1
No signs of cracks or scales
150 150 150
15 15 15
4 4 4
12
20
- 15 - 5 - 15
No signs of cracks or scales
21
- 5 - 5 - 5
No signs of cracks or scales
( Continued )
6

8. Isr5831-1984
(1)
xi)
xii)
xiii)
xiv)
xv)
TABLE 1 TEST REQUIREMENTS FOR PVC INSULATION - Contd
TEST UNIT TYPE OB INSULATION METHOD
C__-h--7 OB TEST
A B C ( REP TO
PART No.
OF IS :
10810* )
(2) (8) (4) (5) (8) (7)
Colour fastness to daylight rating 4 4 4 18
exposure, Mitt
Colour fastness to water ( I~C Note 3 )
C Tempera-
1 ture ( tole- “C 70 70 70
a) Treatment{ rance
I f 2OC)
(Duration hours 48 48 48
b) Visual examination - fret from traces of colour
Thermal stability ( w Note 4 )
a) Test temperature “C 200 200 200
( tolerance * 0’5OC )
b) Time, Min minutes 80 100 100
Bleeding and blooming test 19
( Tempera- “C 50 50 50
( ture ( tole-
a) Treatment{ rance
I f 2 ° C )
1 Duration hours 72 72 72
b) Observation no appreciable staining of
indicator compound or
filter paper
Water absorption test 33
( gravimetric )
f Tempera- *Cl 85 -
I ture ( tote-
a) Treatment {’ rance’
I l PC 1
1 Duration days - 14 -
b) Water absorbed, Max mg/cms - 10 -
NOTE 1 - Volume resis_tivity and insulation resiattnce tests mpy be done at
room temperature instead oi 27°C. However, in case of doubt or disputr, the test
results shall bc confirmed by testing at 27°C.
NOTE 2 - Time under load:
First case- Cab1t.s having a rated voltage not exceeding 3*3/3*3’3 kV
and a wnductor cross-section notexceeding 35 mm*.
Second cate-Cables not covered under first case.
Now 3 - Undrr preparation. In the meantime, test method given in Appendix
A shall be folloued.
Norr~ 4 - Under preparation. In the meantime, test methods given in
Appendix U shall be followed.
*Methods of tryst for cables.
7

9. 1s : 5831 - 1984
TAELE 2 TEST REQUIREMENTS FOR PVC SHEATH
( Clause 4.1
UNIT
l%.
T E S T TYPE OB SHEATH
_--h-_--, hhWHODOB
TEST (REP
PART No. or
IS: 10810* )
(6)
7
ST1 ST2 ’
(3) (4) (5)
N/mm% 12’5 12’5
percent 150 150
“C 80 100
days
N/mm*
percent
percent
percent
7 7
12.5 12.5
f 20 f 25
150 150
z!z 20 f 25
“C 80 100
days 7 7
mg/cma 2 2
“C 80 30
hours
hours
percenl
:
50
ti
6
50
(1) (2)
i) Without ageing
a) Tensile strength, Min
b) Elongation at break,
Min
ii) After ageing in air oven
r Tempera-
ture ( tole-
a) Treatment .! rance
i f 2oc)
1Duration
11
b) Tensile strength
1) Value after ageing,
Min
2) Variation, Max
c) Elongation at break
1) Value after ageing,
Min
2) Variation, Max
iii) Loss of mass in air oven
(Tempera-
I ture ( tole-
a) Treatment{ rance
I f 2 ° C )
(Duration
b) Loss of mass, MUX
iv) Hot deformation test
a) Test temperature
( tolerance l 2°C )
b) Time under load
( see Note 1 )
First case
Second case
c) Depth of indentation,
Max
10
15
( Confinucd )
8

10. fSr5831-1984
TABLE 2 TEST REQUIREMENTS FOR PVC SHEATH - Confd
SL TE S T
No.
UNIT TYPEOFSHEATH M ETHOD OF
_-h_l-y TEST f REPTO
(1) (2)
v) Heat shock test
(Tempera-
I ture f tole-
a) Treatment{ ran&
I * 2°C )
1Duration
b) Visual examination
vi) Shrinkage test
CTempera-
1 ture ( tole-
a) Treatment{ rance
I -f 2 ° C )
LDuration
b) Shrinkage, MUX
vii) Cold bend test for diameter
< 12’5 mm
1) Test temperature
( tolerance * 2°C’
b) Visual examination
viii) Cold impact test for dia-
meter > 12.5 mm
a) Test temperature
( tolerance * 2°C )
b) Visual examination
ix) Colour fastness to daylight
exposure, Min
x) Colour fastness to water
f Tempera-
I ture ( tole-
a) Treatment{ rance
i,
i 2°C )
Duration
b) Visual examination
(3)
“C
hour
-
“C
minutes
percent
“C
“C
-
rating
“C
hours
-
‘ST1 ST2
(4) (5)
150 150
1 1
No rigyc;racks or
150 150
15 15
4 4
- 15 - 15
No signs of cracks
or scales
- 5 - 5
No signs of cracks
or scales
4 4
70 70
48 48
Free from traces
of colours
PAR; No. OP
IS: 10810* )
(6)
14
12
20
21
18
( See Note 2 )
( Confinued )
9

11. ISr!5831- 1984
TABLE 2 TEST REQUIREMENTS FOR PVC SHEATH - Contd
SL TEST
No.
(1) (2)
xi) Thermal stahility
a) Test temperature
( tolerance f 0’5% )
bj Time, Min
xii) Bleeding and blooming
[Tempera-
/ ture ( tole-
a) Treatment{ rance
I f 2°C)
1 Duration
b) Observations
xiii) Oxygen index -
NOTE 1 - Time under load:
UNIT
(3)
OC
minutes
“C
hours
TYPE OF SHEATH
~---_*_-~~
ST1 ST2
(4) (5)
200 200
40 80
50 50
METHOD OF
TEST ( REP TO
PART No. O F
IS : l;)lo* )
( See Note 3)
19
72 72
No appreciable
staining of indicator
compound or filter
(
First case-4 hours for test piece having an outer diameter not
exceeding 12’5 mm.
pap&
Under consideration )
Second case--6 hours for test piece having an outer diameter
exceeding 12’5 mm.
NOTE 2 - Under preparation. In the meantime, test method given in Appendix
A shall be followed.
NOTE 3 - Under preparation. In the meantime, test method given in Appendix
B shall be followed.
*Methods of test for cables.
10

12. IS: !%831-1984
A P P E N D I X A
[ Tuble 1, Item ( xii ) and Table 2, Item ( x ) ]
TEST FOR COLOUR FASTNESS TO WATER
A-l. A piece about 100 mm long of insulation or sheath is out into small
pieces and immersed for the specified period in about 10 times its own
volume of distilled water maintained at the specified temperature. At the
end of the period, the water shall be examined. It shall be free from any
trace of colour.
A P P E N D I X B
[ Table 1, Item ( xiii ) and Table 2, Item ( xi) ]
THERMAL STABILITY TEST
B-l. Testing Equipment
El.1 Class tubes closed at one end 110 mm long with an outer diameter
of approximately 5 mm and an inner diameter of 4.0 f 0.5 mm.
B-l.2 Universal indicating paper with a PH range of 1 to 10.
B-1.3 Thermostatically controlled heating apparatus for the specified
temperature.
B-l.4 Thermometer calibrated in divisions of O*l”C.
B-1.5 Stop-watch or a suitable time meter.
B-2. Testing Method
a) From the insulation of each core to be tested or from the sheath
to be tested, three samples, each of 50 f 5 mg, shall be taken in
the form of strip, if possible. For small thickness the sample
may consist of two or more strips. Each sample shall be inserted
into a glass tube as specified in B-1.1. The sample shall occupy
the bottom of the tube and not project more than 30 mm above
the bottom.
b) A strip of dry universal indicating paper as specified in B-1.2,
about 15 mm long and 3 mm wide, shall be inserted into the
open end ( top ) of the glass tube so that the strip protrudes
about 5 mm out of the tube and can be bent to keep it i n
position.
11

13. k3 : 5831 - 1984
c) The glass tube shall be placed into the heating apparatus, as
specified in B-1.3, which has already attained the test tempera-
ture specified. The glass tube shall be inserted. into the heating
apparatus for a depth of 60 mm.
4 The time taken for the universal indicating paper to change
colour from a pH value of 5 to a pH value of 3 shall be measured,
or the test continued for the specified duration without the
colour change occurring. The colour change point shall be consi-
dered to have been reached when the red colouring of the
universal indicating paper characteristic of a @H value of 3 is just
becoming visible. The universal indicating paper shall be
renewed ( especially for long duration stabilities ) ‘towards the
end of the expected test time every 5 to 10 min, so that the
change point is better visible.
B-3. Evaluation
B-3.1 The average value of the thermal stability times of the three samp
les shall not be lower than the value specified in Table 1 or Table 2 as
applicable.
12

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Printed at Simco Printing Press, Delhi

15. AMENDMENT NO. 1 APRIL 1985
TO
IS:5831 -1984 SPECIFICATION FOR PVC INSULATION
AND SHEATH OF ELECTRIC CABLES
(First Revision)
[Page 5, Table 1, SZ No,(v), itm (a)] - Insert
the following after this iten:
‘(1) (2) (3) (4) (5) (6) (7)
b) Loss of m&cm2 2 - - I
mass,
MZX
[Page 6, Table I, SZ No, (vi), itm (b), first
case, co1 (611 - Substitute '4' for '-'.
[Page 7, Table 1, LZ No. (xv)]:
a) - Substitute 'tolerance' for 'toterance'.
b) - Substitute 'absorbed' for 'absortd'.
[Page 8, Table 2, 5'2 No.(iv), item(a), co2 (5)] -
abstitute '80' for '30°.
fop
,kTge 11, clause A-l, line 1) - Substitute 'cut'
I 0
(Page 11, clause B-1.1, 'line 1) - Substitute
'Glass' for 'Class'.
(ETDC 59)
Printed a! Simco Printing Press, Delhi, India

16. AMENDMENT NO. 2 DECEMBER 1995.
IS 5831 I 1984 SPEC%CATlON FOR PVC
INSULATION AND SHEATH OF ELECTRIC CABLES
( Puge 4, clmse I.2 ) -- Add the following matter between ‘Type
C’ and ‘Type ST1 :
‘Type II General purpose insulation for maxiinum rated conduc-
tor temncruture 70’C intended Tar flexible cables wit)1
up to and including R-3/3*3 kV.’
the I’ollowi~r~ new pata for Type S.1’3
sheath intended for use in flexible
at maximum rated conductor tem-

17. ‘_I.. ! ‘/ I able 1 ( C’onriftued ) ‘I’nhle I ( Ch
-_ a- .._-- -...._
Upi1 1 ype of III~ullltlOll RI No. Tea, -.-
( I ) f!)
iv) After agcinl in ait oven
{
IclllpcI;llurc
‘4 ,‘* n) Trcnlmcnl ( tnlcrawe f 2°C )
Dur:ltion
I h) Trn*ilc strength
/ I ) Valua ofltr~a~csit~g. Afln
: 2) Variation. Ai8.r 1’
I!) Elongalion 1; blc;lk
I) Vnluc alter nl:uinl~, AfIn
,2) Variation, dfw
7) Losvotninss i n u i r oven *
’ .; .
’ I
VI)
vii)
..__
I’
Teniperaturc
R) TMtdcnt ( tolcrnnce f’ 2°C )
1 Ihr:iliori
b) Loss of ntass. ,Ifax '
1lOt dCfOfIlh7tfdl ICSt
a) Test tcmpcr:il~~rc
( lolcrluce f 2X’ )
b Tinlr nnder land ( .le~’ Note 2 )
1) Firal case
2) scconh CnFC
C) Depth of lllde~~lilli()ll. hfo.r
Hear shock test
r Terr~pc~;~lurc
tolerance f 2°C)
. . .
” ‘-b) Visual cxnniinnjiou
(3)
0 ,c
Ch)3
N/IIWP
prrccnt
pcrccnl
pcrccnf
“C, ,
I’
tl3ys
mg/cm*
“(’
; 2:
bows
IloIlrs
pcrccnt
“C
how
___
.’
x) C~~d,i~l~c~ test ( for dimueter
> 12‘5 111111 )
n) Test tcIIlpcrntlIlc ( IOICIilIlCC
0.
c
* 2°C)
b) Visual cxaniinntiorr
-
2
. . ,
EO
7
2
!(I
4
65
I 50
J
No signs ol cracks
or scales
150
15
6
-15
No signs of cr.tckc 01
scnlcs
No signs of’ cracks or
SCillhJ
c
xii)
?tiii)
xiv)
3) l'lr:llllI~rll
f ~Icwpcrrlfltrr
{ ( ~olcl;~llrc + ?"f? )
I_ I)ur:tlion
b) Visual cxarriitwliofl
'l~llCllllill slcibilily
b) ‘l’irllc, 11fin
Illceding nrd tlloorlliIlg ICFI
a) ‘I rcnlrncnt J ‘l’elnp I :1111rc
( Iolcr~lllcc f 7°C.)
1. I)ilt;llior~
1,) Oh5rt ';,I itrr1
3) 'llc:l~rllclll
f T’mpernlule
i ( lotcInIlce + 3"<' 1
i lhr;ltiot~

18. ‘I’nhle 1 ( Cortclrded )
(1)
xi)
xii)
,
xiii)
1
i
xiv)
i
xv)
it) 'ICSI lel~lpClilllllC ( ll~1CIilllCC
* 0'5°C)
b) ‘I’irtle, Olin Minute
lllccdiug nutl bloon~ing Ic5l
1
‘l’eilll)L I :Ilurc
a) ‘I rcnlincul ( tolcralKc f 2°C’ )
t. I)ur:iliou
11) Oh~cialioli
“CT
hours
- -
Unit
(3)
rating
“C
Irorirs
_-
“C
Type of lnsulrllon
c---h-___.__
(‘;I
4
70
48
Free from traces of
colour
80
‘;Ilcr ;tlr~orl~liofi Ic’,,l ( g:l;iviuicliic )
I Telllpernluie “C
il) ‘I Icilllncr~l 4 ( tolernnce f -?“C’ 1
1 l~ll~illic~ll di1J.S
b) V:lter nbsol bed, Aft~.r nlg,‘clll~
[ I’ugc IO, lirhle 2, rol 6, SI Ivo. ( xi ) ] ---. Substitute a(,~’ for
‘( See Noc 3 1’.
( I’r/ge I O , /vo/c. .J ) ’ I~clclc.
( Pn,f~es 8 , 9 (I) tl IO. Tit/j/c 2 ) -.-- Add t h e fullcling ‘[‘es! Require_
IICII~S for tlw IICW f’‘C C‘OIU~WLIII~ ‘Type ST3 u n d e r column heading
‘1 ypc of SI~CIIIII’ :I rol 6 (:I‘ Illis iiI>le ant1 renumber the existing ~01 6
3s Cfll 7 :
3

19. S1 No. Test
(1)b’
ii)
iii)
iv)
vi)
‘I
;’ ii)
(2)
,Aflcr nscing in air nvct)
I ‘I cn,pcrnturc
n) ‘I’rcnttiicnt ( (lOll!lilllCC f T"d: )
L)lllillillll
21 sccollcl c:1rc
C) lkptli of intlccit;ilion. Jfnx ’
lle;t sllock lcsl
( 'ICIII~CI alille
U) 'I ICilllllCl~~ { t lolcrencc $2 2°C )
1 I~uralinn
b) Visllal cx;miin:itinn
’ II) ‘lest Iclllperu(lilc ,’
( IOITIilllCC & 2°C ) ,
1~) ‘i~rl;il ~~;ll~iillillioll
biii) Cold iriijxlcl Icql for di:)melcr
> I?‘5 111111
‘4
1Jlli1 T! pc o hcnth
(3) (6)
0.
c
IhI!!?
N/ inni
pclctlrt
7 x0
7
pclcellt
pxcclll
0.
c
tlnys
lll~!Iclrl~
10‘0
% 20
I 50
f 20
X0
7
2’0
“t ' 70
hours
hours
pcrccii(
“C
hour
-
.I
6
65
IS0
1
No signs of cracks or
scalcz
"C
-
y:
- I5
Nn signs 01 crilcks or
sc:lIc~
-5
No signs nf’cr‘lcks nr
<c:, IIZS

20. ” .
(.
IIOIII~
-
“I’
hlinulec
Type of Sheath
(6)
4
70
411
I.rcc froril trnccs of
colours
700
40
so
72
N o ;lyprcciable stain-
itip, or indic:ltor coiii-
pound or filler paper