इंटरनेट मानक

Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to
information for citizens to secure access to information under the control of public authorities,
in order to promote transparency and accountability in the working of every public authority,
and whereas the attached publication of the Bureau of Indian Standards is of particular interest
to the public, particularly disadvantaged communities and those engaged in the pursuit of
education and knowledge, the attached public safety standard is made available to promote the
timely dissemination of this information in an accurate manner to the public.

“जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न' 5 तरफ”

Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”

IS 8337 (1976): Performance requirements of compression

joints of aluminium conductors in insulated cables [ETD 9:
Power Cables]

“!ान $ एक न' भारत का +नम-ण”

Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह”

है”
ह
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
 ( Reaffirmed 2005 )
Indian Standard
SPECIFICATION FOR
PERFORMANCE REQUIREMENTS OF
COMPRESSION JOINTS OF ALUMINIWM
CONDUCTORS IN INSULATED CABLES

,
, ( Second Reprint APRIL 1988 )

UDC 621.315.682:621.315.55(669.717):620.16

BUREAU. OF INDIAN STANDARDS

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MAR0
NEW DELHI 110002

Muy 1977
Gr 4
 hdian Standard
SPECIFICATION FOR
PERFORMANCE REQUIREMENTS OF
COMPRESSION JOINTS OF ALUMINIUM
CONDUCTORS IN INSULATED CABLES
Conductors and Power Cables Sectional Committee, ETDC 32

Chainaan RsprMltiag
Smu M. R. BHAT Bombay Suburban Electric Supply Ltd, Bombay
Mnnbsrs
Smr N. D. CHAWLA(Al- to
Shri M. R. Bhat )
SHR~K. K. AORAWAL l%cc;c;,te General of Posts Rr T&graphs, New

SWRIV. R. SUNDARARAJAN( Alkmate )

Smu S. K. B1sw~ ( GUPTA) Directzrocr General of Mines Safety (M@istTy of
Employment & Rchablhtatlon ),
Dhanbid
SHRIN. K. SEN ( Alkmnte )
WC CDR l-l. S. B~~ATIA Directorate General of Technical Development &
Production ( Air ) ( Ministry of Defencc ), New
Delhi
SHRIH. C. PANDB ( Afknrok )
&RI-K. V. CHAUBAL Federation of Electricity Undertakings of India,
~Bombay
SRRI C. DAWUPTA Calcutta Electric Supply Corporation Ltd, Calcutta
&PUTY DIRECTOR. ELE~RICAL Naval Headauarters
ENOINEERIN~( M;\TERIAL ) -
STAFF OPPICER, ELECTRICAL
ENGINEERING( DWWN) ( Al&mate)
SERl M. DEY Indian Cable Co Ltd, Calcutta
&RI N. V. RA-IIAN( Alternatr)
MAJ R. S. DHANOTA Direccge.~Standardization, Ministry of Dcfence,

SWR~C. M. BHAT( Akaatc)

DIRECTOR( TRANSMISSION ) Central Electricity Authority, New Delhi
DEPUTY DIRECTOR ( TRAN~-
XISSION ) ( A~WIU~Oj
SERBM. L. D~NORH Bom~~;~Jctric Supply 8r Transport Undertaldng,

SHRI ALAR SINGH ( Alternab )

(Continuedon page 2 )

Q Copyright 1977
BUREAU OF INDIAN STANDARDS
This publication is protected under the Indian Copyright Act (XIV of 1957) and
nproduction in whole or in part by an meansexcept with writton permission of the
puhlisher shall be deemed to be an in P.
rlnf3emeot of copyright under the said Act
 is t a337 - 1975

“’ (Chfinuedfrom page 1 )
Members Repmentin~
SHRI V. A. KRISHNAMURTI~Y Central Public Works Department, New Delhi
SURVEYOR OF WORKS 11
( ELECTRICAL) ( Alternate )
SHRI D. R. MANOHAR Nationa 1Insulated Cable Co of India Ltd, Calcutta
SHRI J. S. BHAN ( Altemafe )
SHRI M. N. MUKERJEE Railway Board ( Ministry of Railways )
SHRI C. A. S.ANKARANARAYANAN ( Alternate )
SHRI S. K. MUKHERJ~E National Test House, Calcutta
SHRI S. N. NAYAR Aluminium Industries Ltd, Kundara
SHRI P. K. KRISHNANNASR ( Alfcrnate )
SHRI V. G. G. NAYAR Oriental Power Cables Ltd, Kota
SHR~V. K. CHATURVEDI (Alternate )
SHRIJ. S. PASSI Directorate General of Supplies & Disposals ( Inspec-
tion Wine_ ,,
I. New Delhi
SHRI P. L. KAPUR ( Alfematc )
SHRXA. S. PINTO Delhi Electric Supply Undertaking, New Delhi
SHRI A. K. RAMAN Asian Cables Corporation Ltd, Bombay
SHRI B. K. MUNDHRA ( Alfemale )
SHRI K. N. RAMA~WAMY Directorate Gcncral’of Technical Development, New
Del hi
SHRI D. P. GUPTA (Alternate)
SHRI M. J. RAO Tata. Hydro-Electric Power Supply Co Ltd, Bombay
SHRI M. V. GONDIIALEKAR(Alternate)
SHR~S. SABAPATHY Tamil Nadu Electricity Board, Madras
SHRI P. S. THIRUNAVUKKARWU
( Alternate )
SHRI L. K. SANCHI Fort Glostcr Industries Ltd, Calcutta
SHRI A. S. BHA~TACHARJEE( A&emote )
DR P. S. SHAH Cable Corporation of India Ltd, Bombay
SHRIS. R. PADMANABBHAN ( Alternate)
SrfRr S. P. SACHDEV. Director General. . BIS ! Ex-officio
- Member)
Director ( Elec tech)
Secretaries
Snar T. RAJARAMAN
Deputy Director ( Elcc tech ), BIS
SHRI HARCHARANSINOH
Deputy Director ( Elec tech ),BIS

Panel for Compression Joints for Aluminium and Copper Conductored

Cables, ETDC 32 : P 10
Conuener
SHRI M. R. BHAT Bombay Suburban Electric Supply Ltd, Bombay
Members
SHRI M. L. DONORB Bom;;AtJctric Supply & Transport Undertaking,

SHRI ALTAR SINGH ( Al&mate )

SHRI A. P. MATHUR Mahindra Elcctro-chemical Products Ltd, Pune
SHRr G. S. PATEL Dowell’s Elektroworke, Bombay
SHRI T. B. HUNNUR ( Alternate)
SWRIA. S. PURANDARB Sicmens India-Ltd, Bombay
SHR~ K. RA~~:AN Indian Splicing ( Mechanical ) & Accessories Ltd.
Calcutta

2
 IS : 0337- 1976

Indian Standard
SPECIFICATION FOR
PERFORMANCE REQUIREMENTS OF
COMPRESSION JOINTS OF ALUMINIUM
CONDUCTORS IN INSULATED CABLES

0. FOREWORD
0.1 ThisIndian Standard was adopted by the Indian Standards Institution
on 22 December 1976, after the draft finalized by the Conductors and pow@
Cables Sectional Committee had been approved by the Electrotechnical
Division Council.

0.2 The technique of compression in jointing of electrical conductors is an

alternative method to the already known methods of soldering and welding.
The compression technique employs a wide variety of compressing dies and
tools developed for various applications differing from one another in num-
ber of crimps, shapes and extent of compression. The effects of compression
are compacting of cross section of the main conductor, break-through the
oxide film, and,lor its deformation which determines the ultimate effective_
ness of the joint. Because of the uncertainty with regard to the mechanic&
and electrical characteristics of the compression joint, it is considered d&r-
able to lay down certain specific requirements which, if fulfilled, may ensure
the satisfactory performance of the joint in service. This standard -ha
therefore been prepared to lay down the performance requirements. and
methods of tests of compression joints which will reasonably satisfy the
effectiveness of the compression technique in cable jointing.

0.3 This standard is one of the series of standards for compression joints
for aluminium conductors in insulated cables. The other standards in the
series are:
IS : 8308-I 976 Specification for compression type tubular in-tine
connectors for aluminium conductors of insulated cables
IS : 8309-1976 Specification for compression type tubular terminal
ends for aluminium conductors of insulated cables

0.4 When a connector or termination fo7ning a joint meets the require_

ments of this standard, it is expected that m service:
a) the resistance of the joint will remain stable;
b) the temperature of the joint will be of the same order as that of
the conductor;

3
1s t a337 - 1976

c) if the intended use demands, application of short-circuit current

will not cause undue deterioration; and
d) the mechanical strength will be adequate.
O-4.1 This standard is not fully representative of service conditions and
does not cover conditions arising, for example, as a result of conductor
temperature variation because such stresses depend considerably on the
overall design of the installation in which the connector is used. No test is
included to determine whether the performance of connectors is affected by
compounds with which they might come in contact.
0.5 In preparing this standard, assistance has been derived from the
following:
BS 4579 : Part 1 : 1970 Specification for the performance of compres-
sion joints in electric cable and wire connectors : Part 1. Copper
Conductors. British Standards Institution.
DOC : 73/288%6 DC Draft British Standard Specification for the per-
fomance of mechanical and compression joints in electric cable
and wire connectors : Part. . . . . Aluminium conductors. British
Standards Institution.

0.6 For the purpose of deciding whether a particular requirement of this

standard is complied with, the final value, observed or calculated, expressing
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.

1. SCOPE

1.1 This ~standard specifies the performancerequirements and methods of

testsfor compression joints of aluminium conductors in insulated cables of
rated vol;ages up to and including 11 kV.

2. TERMINOLOGY

2.0 For the purpose of this standard, the following definitions sha!l apply.
2.1 Compression Joint -A permanent connection formed by a process
of fixing a terminal end, or in-line connector for branch connection, to a
conductor by pressure forming or reshaping the terminal end or connector
barrel around the conductor to establish a good electrical and mechanical
contact.
--
*Rules for rcuncling off numerical values ( reui.ccd).

4
 Is : 8337 - 1976

2.2 Terminal End - A connecting device with barrel accommodating

respective conductor size of electrical cable and which has a fixing arrange-
ment of termination by means of a bolt fixing or pin-insertion in tunnel type
terminal blocks and screwing.

2.3 In-Line Connector - A connecting device accommodating two elec-

trical conductors to form straight joint.

2.4 Compression Tool -A hydraulic or mechanical device for

compressing.

3. CLASSXFICATION

3.1 The connectors are classified as follows:

Type 1 -- Connectors for which short-circuit test is applicable.
Type 2 - Connectors for which short-circuit test is not applicable,

4. REQUIREMENTS

4.1 Joint Resistance

4.1.1 h&z2 Value -- The initial resistance ( A to B ) of the ( all )

specimen(s) when tested in accordance with 6.2 shall not:
a) excecdqthe resistance of a length of conductor equal to the length
of the compression barrel ( dimension L ), and
b) differ by more than 50 percent or 5 pn ( whichever is greater )
from the mean of the overall rcsistanccs of the :sis specimens
prepared in accordance with 5.1.
4.1.” Values Measured in the Course oJ’ Short-Circuit Test - The resistance:
( A to B ) of the ( al: ) sp ecimen(s) memurcd after anv one of the thret:
applications of short-circuit current in accorclancc with 6.3 shali not
exceed the initial. value by more than 50 percent or .5 pa, \\%ichcver is
greater.
4.1.3 Values Meaxured CAer Electrical l-dad Cycling

4.1.3.1 The average resistance ( -4 to B ) of t.he test spccimcn taken over

1 600 cycles shall not exceed the average equivalent conductor resistance
taken over the same period, by more than 50 percent or 5 PQ, whichever
is greater.
Nom-The equivalent conductor resistance is the resistance of the length of the
control conductor of length equal to half the ferrule length.
4.1.3.2 The average resistance ( A to B ) of the test specimen taken
over 1 000 cycles shall not exceed the resistance oft he test specimen as

5
I§ : 8337 - 1976

measured immediately before the start of the electrical load cycle test, by
more than 50 percent or 5 pn, whichever is greater.
4.1.3.3 The graph of resistance ( ‘4 to B ) against number of cycles
shall demonstrate ~with a reasonable probability that the change ( rise or
fall ) of resistance over 1 000 cycles is not more than 20 percent of the average
resistance over the same period.
NOTE - If the graph of resistance is unacceptable to either purchaser or supplier, a
statktical method ( under consideration ) shall be used to determine the acceptability of
a connector or terminal end.

4.X.3.4 In the event of the results of the statistical test in 4.1.3.3 being
considered indeterminate by either purchaser or supplier, then the test shall
be extended bv periods of 1 000 load cycles and the results assessed in
accordance wi’th the Note under 4.1.3.3.

4.2 Tensile Strength -- Connectors and terminal ends, when tested in

accordance with the provision of 6.5 shall withstand without damage a test
load of 40Njmms of the cross-sectional area of the conductor.

5. TEST SPECIMENS

5.1 Preparation -‘- Test specimens shall be made upon insulated conductors
taken from any type of cable conforming to the relevant Indian Standard.
The conductor shall be prepared and the joint shall be made with the
connector using the tools prescribed and in accordance with the instructions
and drawings of the connector manufacturer. No subsequent tightening of
the joints shall be permitted. In the case of through connectors, care shall
be taken to ensure tl at rhc ends of the conductors are not in direct contact,
unless the design of the connector specifically provides for butting of the
conductors.
The insulation shall be retained on the conductor except as necessary
to enable the connector to be assembled, and suitable potential measuring
points shall be provided to enable temperature measuring devices to be
placed in contact with the control conductors.

5.2 Number of Specimens - Six similar specimens shall be prepared for

each type 2nd size of joint.

When a connector or terminal end has dimensions such as to enable

it to accept a range of conductors, tests shall be made on six specimens of
both the smallest and largest sizes of conductor in the declared range.
If a particular tvpe of connector or terminal end is meant for more
than one shape of solid conductor, six specimens shall be tested for each
shape of conductor.

6
 ISr8337-1976
Where terminal ends for a given shape and size of conductor are
available with different palm sizes, but are otherwise identical, tests shall
be carried out on terminal ends with the smallest palm size only.

6. TESTS

6.0 General - Before the tests are made, it shall be ensured that the test
specimens comply with 5.

6.1 Sequence of Tests -Tests on each specimen shall be made in the

sequence given below:
a) Before the specimens have been assembled into the load cycling
rig:
1) Initial resistance measurement ( 6.2 ),
2) Short circuit test on Type 1 connectors ( 6.3 ), and
3) Resistance measurement on Type 1 connectors ( 6.2 ).
b) After the specimens have been assembled into the load cycling
rig:
1) Electrical load cycle test ( 6.4 ), and
2) Resistance measurement ( 6.2 ).
c) After completion of the load cycle test:
Tensile strength test ( 6.5 ).

6.2 Resistance Measurement - Electrical resistance measurement shall

be carried out by the method of voltage drop by the use of two probes on
the completed crimped joint ( see Fig. 1 ). The maximum source voltage
shall not exceed 30 V de. The current shall be passed consecutively in each
direction. The points of voltage drop measurement of terminal ends and
in-line connectors are as shown in Fig. 2. The resistance measurement shall
bc carried out at a temperature of 27 f 5°C.

6
VARIABLE
dc SUPPLY
30VlMAXi
Y

FIG. 1 ELECTRICALRESISTANCEMEASIREMENT

7
IS : 8337 - 1976

SPECIMEN
--____ RESISTANCE

FREE CONDUCTOR
--
RESISTANCE -4

ZA Terminal Ends

A 0
SPECIMEN RESISlANCE

2B In-line Connectors

Fxo. 2 Poxprrs FOR T’OLTAGF, DROP MEASUREMENT

The joint resistance shall be regarded as that determined by subtract-

ing from the specimen resistance, the resistance of the fret length of
conductor between the joints and then dividing the result by two.

This test shall also be carried out at approximately every 100 cycles
during the course of 1 000 cycles .of the electrical load cycle test ( see 6.4 ) .
The initial value of resistance of joint before electrical load cycle test
shall not exceed the resistance of a length of the conductor equal to the
length of the compression barrel.
6.3 Short-Circuit Test -- Under consideration.

6.4 Electrical Load Cycle Test

-6.4.1 Testing Conditionr

6.4.1.1 General --- The tests shall be carried out in reasonable draught-
free conditions. The test loop shall be erected so that the distance between
connectors or terminal ends or any other connections introduced to facihtat.c
testing shall be suffkient to ensure negligible thermal interference.

Each connector or pair of terminal ends shall be supported in such a

way that air may freely circulate around the assembly to provide cooling by
natural convection.

8
 IS:833701976

If a connector is such that two sizes of conductor are being connected

into the main loop the smaller of the two shall be used as the control
conductor.
6.4.1.2 Through connectors and terminal ends - Typical arrangements of
the test loop are shown in Fig. 3. It shall contain a length of unjointed
conductor, of not less than l-2 m, the control part of which shall be used
as the control for temperature and resistance measurements.

3A In-line Connectors

3B Terminal Ends
1- Contactor and timing device for automatic control
2 - Variable transformer
3 - Transformer
4 - Control conductor
a- Connector or terminal end under test
b- Reliable connections for test purposes ( form optional )

FIG. 3 TYPICAL TEST CIRCUIT FOR ELECTRICAL LOAD CYCLE TEST

Where terminal ends are to be tested, the terminal ends shall be fitted
to each end of the unjointed conductor. Only terminal ends of the same size
and make shall be bolted together. Linking bars may be used provided that
the temperature of the terminal end does not differ by more than 5°C from
the temperature attained when the terminals are bolted palm to palm.
6.4.2 Test Procedure -The test shall be carried out on six specimens
prepared in accordance with 5.1. After the samples have been assembled

9
 Is t 8337 - 1976

into the test loop, but prior to load cycling, the resistance across each
connector and terminal end shall be measured as specified in 6.2.
The load cycle test is to be carried out for 1 000 cycles of which three
intermediate additional heating cycles after 500, 700, 900 cycles shall be
performed as specified in 6.4.2.1.

The test current shall be so adjusted that the control conductor

raised to a final temperature of 100°C in 20 minutes. This current shall be
evaluated by a preliminary experiment. After the samples have attained
this temperature, the current shall be switched off and the conductor and the
joints shall be cooled to at lcast 4U’C in 20 minutes. The above schedule
will comprise one load cycle.
During load cycling, the temperature of the control conductor shall
be measured with an indicating or recording instrument every 40 minutes for
the upper and lower temperature limits; necessary adjustment in the heating
current being permitted to compensate for any change in the ambient
temperature.

At the end of approximately 100 cycles, the current shall be switched

off and the test loop allowed to cool until the connectors have acquired the
temperature of their surroundings. Resistance measurements as specified
in~6.2 shall be made.

6.4.2.1 Intermediate additional heating cycles - These are to be performed

after 500, 700, 900 heating cycles. After each of these number of load
cycles, sufficient current should be passed through the samples to heat them
to 200°C in 5 minutes. The tcmpcrature shall be maintained by adjust-
ment of the current for a duration of 5 seconds. The specimens shall then
be cooled to the lower temperature limit of 40°C. Joint resistance shall be
measured.

This test shall be repeated at the end of 700 and 900 load cycles.

6.4.3 Presentation of Results - The results of the tests shall be presented

graphically in the form shown in Fig. 4 and 5; the scales of the graphs being
chosen to show clcar!y any significant changes of resistance or temperature.

6.5 Tensile Strength Test

6.5.1 This test is carried out on all types of connectors and terminal ends.
The test shall be carried out in 6 of the 12 specimens subjected to electrical
load cycle test. The test specimens shall be inserted in the jaws of the tensile
testing machine in such a manner as to ensure that the load is applied directly
along the axis of the conductor in the case of bolted in-line connectors and
terminal ends. The body of the in-line connector or terminal end should
not be gripped by the jaws of the tensile testing machine. The axial pull
shall be applied by separating the jaws of the tensile testing machine at a

10
 IS : 3337 - 1976

steady rate between 25 and 50 mm/kin. The test specimen shall be tested
to failure.

6.5.2 Criteria of Failure - The joint ( in-line connector or terminal end )

shall be judged to have failed when the conductor starts slipping out of the
in-line connector or terminal end, The load at which klipping or yield of
the conductor commences is directly indicated by the load-reading dial of
the tensile testing machine.

Nom - This load reading remains fixed at the value at which the conductor start,
slipping out~of the barrel and can be recorded. It does not depend on the amount of
slip from the barrel as, though the conductor continues to slip from the barrel after the
joint has failed, yet the load remains at the value recorded at the commencement of the
slip.

7. MATHEMATICAL ACCEPTANCE CRITERION OF

COMPRESSION JOINTS

7.1 The mathematical acceptance method is under consideration. Typical

graphs of resistance versus load cycles for two specimens shown as A and B
are given in Fig. 6 and 7 for itiormation.

i, 160 260 360 660 760 860 960 do0

NUMBER OF CYCLES

Fro. 4 GRAPH OF TEMPERATURE nersusNUMBER OF C~cms

(ELECTRICAL LOAD CYCLE TEST )

11
IS:833701976

NUMBER OF CYCLES

Fm. 5 GRAPH OF RESISTANCE versusNUMBER OF CYCLES

( ELECTRICAL LOAD CYCLE TEST)
CHANGE OF RESISTANCE .OVER

-5 -‘ -3 -2 -1 0 I 2 3 ‘ 5

M - Change of resistance
R - Mean resistance
Fm. 6 GRAPH OF RESISTANCE WYW LOAD CYCLES
( AccEpTANcE CRITERION FOR SPECIMEN A)

12
 IS : 8337 0 1976

CWANGE OF RESISTANCE OVER

500 CYCLES CALCULATED

M = Change of resistance

ii = Mean resistance
S = Scatter of resistancevalues abcut line of best fit
D=M+S

FIG. 7 GRAPH OF RESISTANCE UYSUS LOAD CYCLES

( ACCEPTANCE CRITERION FOR SPECIMEN I3 )

8. TEST REPORTS

8.1 Test reports shall include the particulars required in Appendix A

together with any other relevant information.

8.2 The results of each measurement called for in the sequence of tests
set out in 6.1 shall be recorded together with the date when the joints were
made; the date of making tests; and in the case of rcsistancc measurements,
the ambient tcmpcraturc.

8.3 The results of tests shall be presented graphically as shown in Fig. 4, 5, ~6

and 7.
NOTE - Fig. 6 and 7 will be used for acceptability, only after the statistical method
is specified.

13
cs : 8337-o1976

APPEND-IX A
( Clause 8.1 )
SCHEDULE OF TECHNICAL INFORMATION

A-I. DETAILS TO BE IRECORDED

A-l.1 The principal details of the connector or terminal end should be

recorded, by reference or otherwise, including the following:

4 Manufacturer;

b) Catalogue or reference number;

4 Type of connector ( for example, straight through, terminal end

etc);

4 Principal dimensions ( or reference to any drawings as necessary)

and sufficient details of system and tooling used to avoid
ambiguity;

4 Conductor(s) for which suitable ( including tolerance on

conductor size, if applicable ):

I Conductor Maximum
.-
Minimum Shape

Main

Branch or service
( if relevant )

f 1 Method of connection ( for example, compression );

!d Material specifications;

hj Surface finish, if any;

.ij Type of cable from which test conductor is taken, namely:

I) size,
2) manufacturer, and
3) compound, if any ( for example, AUflfI, etc j;
W Statement as to any compound used as part of the jointing system;
and
4 Statement as to the essentials of the method of assembly of the
samples, for example, whether, to what extent and by what means
conductors and connectors were cleaned, date of assembly, etc.

14
BUKEAU OF INDIAN STANDARDS
Headquarters :
Manak Bhavan. 9 Bahadur Shah Zafar Marg, NEW DELHI 110002
Telephones : 3 31 01 31,3 31 13 75 Telegrams : Manaksanstha
( Common to all Offices )
Regional Offices : Telephone
*Western ; Manakalaya, E9 MIDC, Marol. Andheri ( East ), 6 32 92 95
BOMBAY 400093
tEastern : l/14 C. I. T. Scheme VII M, V. I. P Road, 36 24 99
Maniktoia, CALCUTTA 700054
Northern : SC0 445-446, Sector 35-C
CHANDIGARH 160036 { z::::
Southern : C. I. T. Campus, MADRAS 600113 41 24 42
J 41 25 19
141 29 16
Branch Offices :
Pushpak,’ Nurmohamed Shaikh Marg, Khanpur, 2 63 48
AHMADABAD 380001 { 2 63 49
‘F’ Block, Unity Bldg, Narasimharaja Square, 22 48 05
BANGALORE 560002
Gangotri Complex, 5th Floor, Bhadbhada Road, T. T. Nagar, 6 27 16
BHQPAL 462003
Plot NO. 82/83, Lewis Road, BHUBANESHWAR 751002 5 36 27
5215 Ward No. 29. R. G. Barua Road, -
5th Byelane. GUWAHATI 781003
5-8-56C L. N. Gupta Marg. (Nampally Station Road), 22 10 83
HYDERABAD 500001
R14 Yudhister Marg, C Scheme, JAIPUR 302005 6 34 71
{ 6 98 32
117/418B Sarvodaya Nagar, KANPUR 208005 21 68 76
21 82 92
Patliputra Industrial Estate. PATNA 800013 6 23 05
Hantex Bldg ( 2nd Floor ), Rly Station Road, 52 27
TRIVANDRUM 695001
inspection Office ( With Sale Point ):
Institution of Engineers India 1 Building, 1332 Shivaji Nagar, 5 24 35
PUNE 410005

*Sales Office in Bombay is at Novelty Chambers, Grant Road, 89 66 28

-Bombay 400007
tSales Office in Calcutta is at 6 Chowringhee bproach, P. 0. Princep 27 68 00
Strew. Calcutta 700072

Reprography Unit, BIS, New Delhi, India

 AMENDMENT NO. 1 SEPTEMBER 1980
TO

IS : 8337-1976 SPECIFICATION FOR

PERFORMANCE REQUIREMENTS OF
COtiPRESSION JOINTS OF ALUMINIUM
COiDUCTORS IN INSULATED CABLES
Alteration

( Pages 5 and 6, clauses 4.1.1 to 4.X.3.3 ) - Substitute the following

tbr the existing clauses:

4.1.1 Initial Value - The initial value of joint resistance ( JCCNote ) of

the ( all ) specimen(t) when tested in accordance with 6.2 shall not:

a) exceed the resistance of a length of conductor equal to the

)cn@h of the compression barrel ( dimension L ), and
b) differ by more than 50 percent or 5 micro-ohm ( whichever is
greater ) from the mean of The initial joint resistance values of
the six specimens prepared in accordance with Xl.
NOTS -Joint resistance ~ Specimen resistance AB - Free conductor resistance
( m Fig. 2 ) 2

4.1.2 Valurs Mearured in fhe COUSC of sh0~1-Ci~d 7tsf - The joint

resistance ofthe ( all ) specimen(s) mcasurcd after any one of the three
applications. of short-circuit current in accdrdance with 6.3 shall not
exceed the initial joint resistance values by more than ‘0 pcrccnt or 5
micro-ohm, whichever is greater.

~1.3 Values Mtosurrd after Electrical Load Cycling

,4.1.3.1 The average of six final values of joint resistance of the test
specimen taken over 1 COO CYCICS shall not exceed the average rquivalent
conductor resistance taken over the same period by more than 50 percent
or 5 micro-ohms, whichever is grcatcr.

Nom - The cquiralcnt conductor rcsirtrncr ir the reristance of the length of the
control conductor of length equal to half the ferrule length ( which ir marketi 2L in
Fig. 2 ).

4.1.3.2 The average of six final values of joint resistance of the test
specimen taken over 1000 load CYC~CS shall not exceed the resistance of
the test specimen as measured immediately bcforc the start of the
electrical load cycle test, by more than $0 percent or 5 micro-ohms,
whichever is greater.

1
k-

4.1.3.3 The graph of joint resistance against number of load cycles

shall demonstrate with a reasonable probability that the change ( rise or
faJJ ) ofthc resistance over 1000 cycles is not more than 20 percent of the
average resistance over the same period.

NOTE- If the graph of resistance b unacceptable to tither purchaser or supplier,

a statistical method ( under consideration ) shall be used to determine the acccpt-
ability of a connector or terminal end.’

(El-DC 59)

2
Reprography Unit, BIS, New Delhi, India