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है”ह”ह
IS 13730-0-3 (2012): Specifications for Particular Types ofWinding Wires, Part 0: General Requirements, Section 3:Enamelled Round Aluminium Wire [ETD 33: Winding Wire]
1s ‘13730 ( PartO/Ssc 3 ) : 199a
Indian Standard
PARTICULAR TYPES OF WINDlNG WIRES - SPECIFICATION
PART 0 GENERAL REQUIREMENTS
Section 3 Enamelled Round Aluminium Wire
UDC 621*3150337.4 : 621*315.55 [ 669*71-426 ] : 621-3.045 /
0 BIS 1994 i
1
BUREAU 0.F INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI ilOOQ2
December 1994 Price Grwp 5
winding Wires Sectional conrmittec, ETD 33
FOREWORD
This Indian Standard ( Part O/Set 3 ) was adopted by the Bureau of Indian Standards, after the draft finalized by the Winding Wires Sectional Committee had been approved by the Electrotechnical Division Council.
This standard is a part of the new series of standards being brought out in dual number with the corresponding IEC Publications. The standards on aluminium wires could not be published in dual number because of differences in requirements of elongation, heat shock, etc, with respect to corres- ponding IEC requirements. However, clause numbers and format of these standards are kept same as for other standards under the same series.
With the publication of, this standard along with other related standards, existing Indian Standards on aluminium ( Parts of IS 4800 series ) wires would be withdrawn.
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 ‘Rules for rounding off numerical values ( revised )‘. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.
PART 0 1 GENERAL REq!PEMENTS
. . I Section 3- - Enain&&l RoGnd A!uminlllii”~ire
j The clause numbers’used in this standard are idenltical with the respective test number? of IS 13778 series. : )
In case of inconsistencies between the publica- tion on methods of test and this standard, IS 13730 ( Part 0,Sec 3 ) : 1994 shall prevail. Where no specific range of nominal conductor diameters is grven for a test, the test applies to all nominal conductor- diameters covered by the relevent part of this standard.
1 S+OPE 1 I,
This!standard ( part OjSec 3 ) specifies the gene- ral rtauiiements of enamelled round ilumin~um winding wires with or without a bonding layer.
The ’ range of nominal conductor diameters, 1s given in the relevant parts of this standard:,
I 2 REFERENCES
2.1 The.followipg Indian Standards are .neces- sary adjuncts to this standard:
482 ::: 1981
1076 (Part 1 )‘: 1985
5825 ;: 1993
/t
13778 : 1993 I ( series )
Title
Reels for covered round electrical winding wires ( third revision )
Preferred numbers : Part’ 1 Series of preferred numbers ( second revision )
Guide for evaluation of ther- mal endurance of enamelled wires (first revision )
Methods of test for winding wires - Series )
3 DtiFINITIONS AND GENERAL NOTES ON METHODS OF ‘TEST
3.1 Ijefiaitions
3.1.1 Conductor
The bare &eta1 after removal of the coating.
3.1.2 Crack - - -. -.-- -~--~--- --. -
An opening in the insulation which exposes the conductor to view at the stated magnification.
3.1.3 Sole Coating
An insulation composed of one material. b
3.1.4 Wire !’ / ”
The insulated wire as received.
3.2 Genera)- Notes-onMetbuds of Test- ‘. ..
All methods of test to be used for this standard are given in TS 13778 series.
Unless otherwise specified, all’ tests shall be carried out at a temperature from 15°C to 35°C and a relative humidity from 46 percent to 75 percent. Before ‘measurements are ‘made, the specimens shall be preconditioned under these atmospheric conditions for a time sufficient to allow the specimens to reach stability.
The wire to be tested shall be removed from the packaging in such a way that the wire will not be subjected to tension or unnecekary bends. Before each ‘test, sufficient wire should be discarded to ensure that any damaged wire is not included in the test specimens. il
4 DIMENSIONS
4.1 Conductor Diameter
The series of preferred nominal conductor ,dia- meters shall correspond to series R20 according to IS 1076 ( Part 1 ) : 1985. The actual values and their tolerances are given in Tables 1 and 2.
The series of intermediate diameters from which the user may select ihtermediate nominal &on-
-ductor diameters, when required for technical reasons, shall correspond to series R40 according to IS 1076 ( Part 1 ) : 1985. The actual values and their tolerances are given in Annex A.
The conductor diameter shall not differ from the nominal diameter by more than the limit given in .Table 1 or Table 2.
4.2 Out of Roundness of Conductor
-Thed&rence between the minimum and maxi- mum diameter, at any one point, shall not be more than the figures given in co1 2 of Table 1 or Table 2.
IS 13730 ( Part opec 3 ) .: -!994
Table 1 Dimensions of Enamelled Wires ( R20 )
(Clauses4.1, 4.2, 4.3.1 and4.4.1)
Nominal Co oductor Minimum Increaee Maximum Overall Conductor Tolerance due tu the Iasulation
-, Diameter
Diameter f mm mm
Z-Y ;“2”, Grade 1 Grade 2 Grade 3, Grade 1 Grade 2 Grade 3
(3) (4) (5) (6) (7) (8)
0’250 0’004 0’01 T 0’032 0’048 0’28 1 0’297 0’312
0’280 0’004 0’018 0’033 0’050 0’312 0’329 0’345
0’315 0’004 0’019 0’035 0’053 0’349 0’367 0’384
0’355 0’004 0’020 0’038 0’057 0’392 0’411 0’428
0’400 0’005 O’P21 O-040 0’060 0’439 0’459 0’478
0’450 0’005 0’022 0’042 0’064 0’491 0’513 0’533
0’500 0.0;s 0’024 0’045 0’067 0’544 0’566 0’587
0’560 0’006 0’025 0’047 0’071 0’606 0’630 0’653
0’630 0’006 0’027 0’050 0’075 0’679’ 0’704 0’728
0’710 0’007 0’028 0’053 0’080 0’762 0’789 0’814
0’800 0’008 0’030 0‘056 0’085 0’855 0’884 0’911
0’900 0’009 0’032 0’060 0’090 0’959 0’989 1’018
1’000 0’010 0’034 0’063 0’095 1’062 1’094 1’124
1’120 0’011 0’034 0’065 0’098 1’184 1’217 1’248
1’250 0’013 0’035 0’067 0’100 1’316 1’349 1’381
I ‘400 0’014 0’036 0’069 0’103 1’468 1’502 1’535
1’600 0’016 0’038 0’071 0’107 1’670 1’705 1’740
1’800 0’018 0’039 0’073 0’110 1’872 1’909 1’944
2’000 0’020 0’040 0’075 0’113 2’074 2’112 2’148
2’240 0’022 0’041 0’077 0’116 2’316 2’355 2’392
2.500 0’025 0’042 0’079 0’119 2’578 2’618 2 ‘656
2’800 0’028 0’043 0’081 0’123 2’880 2’922 2’961
3’150 0’032 0’045 0’084 0’127 3’233 3’276 3’316
3’550 0’036 0’046 0’086 0’130 3’635 3’679 3’721
4’000 0’040 0’047 0’089 I
0’134 4’088 4’133 4’176
4’500 0’045 0’049 0’092 0’138 4’591 4’637 4’681
5’000 0’050 0’050 0’094 I
0’142 5’093 5’141 5’186
NOTES
1 Minimum overall diameter requirements may be used provided they are based on the minimum increases. The calculation is given in Annex B.
2 For intermediate nominal conductor diameters, the minimum increase figure correspoodingt o the next largest nominal conductor diameter shall be taken.
3 The dimensions of intermediate nominal conductor diameters for R40 series are given in Annex A.
IS 13730 ( Part O/Set 3 ) : 1994
Table 2 Dimensions of Enamelled Wires with a Bonding Layer ( R20 )
( Clauses 4.1, 4.2, 4.3.2 and 4.4.2 )
‘-
Nominal Coadoc to Conductor Tolerance Diameter f
mm
(1)
0’250
.0’280
0.315
0’355
0’400
0’450 0’005 0 045 0’065
0’500 0 005 0’048 0’069
0 560 0’006 0’049 0’071
0’630 0’006 0’052 0’075
0’710 0’007 0’054 0 079
0’800 0’008 0’057 0’083
0’900 0 009 0’060 0’088
‘1’000 0’010 0’063 0’092
1’120 0’01 I 0’064 0’095
1’250 0’013 0’065 0’097
1’400 0’014 0’067 0’100
1’600 0’016 0’070 0’103
1’800 0’018 0’072 0’106
2’000 0’020 0’074 0’109
i Miaimum Increase
I mm
Grade 1R
(3)
Grade 2B
(4) __
0’036 0’051
0’037
d’039
0’052
0.055
0‘041 0’059
0’043 0’062
Maximum Overall Diameter
mm
Grade IB Grade 2B
(5) (6)
0’300 0’316
0’331 0’348
0’369 0’387
0 413 0’432
0’461 0’481
0 514 0’536
0’568 0’590
0’630 0’654
0’704 0’729
0’788 0’815
0.882 0’911
0’987 1’017
1’091 1’123
1’214 1’247
1’346 1’379
1’499 1‘533
1’702 1’738
1’905
I
1’942
2’108 2’146
NOTES
1 Minimum overall diameter requirements may be used provided they are based on the minimum increases. The calculation is given in Annex B.
2 For intermediate nominal conductor diameters, the minimum increase figure corresponding to the next largest nominal conductor diameter shall be taken.
3 The dimensions of intermediate nominal conductor diameters for R40 series are given in Annex A.
4.3 Minimum Increase in Diameter Due to the 4.4 Maximum Overall Diameter Insulation and the Bonding Layer
4.3.1 Enamelled Wires Without a Bonding Layer 4.4.1 Enamelled Wires Without a Bonding Layer
The minimum increase in diameter due to the insulation shall not be less than the values given The maximum overall diameter shall not exceed
ia Table 1. the values given in Table 1.
4.3.2 Enamelled Wires with a Bonding Layer 4.4.2 Enameled Wires with a Bonding Layer The minimum increase in diameter due to the insulation including the bonding layer shall not The maximum overall diameter shall not exceed be less than the values given in Table 2. the values given in Table 2.
3
5 ELECTRICAL RESISTANCE, p
No resistance values are specified. . .
By agreement between the purchaser and the supplier, resistance measurements may be made for nominal conductor diameters up to and including 1QOO mm;. In: &se of such an agrew,.. ment, the resistance at 20°C shall be within the limits’ given in Annex D.
8.3 ,Jark Feat ( Norpipoi co8$c@ Diameters Up to‘ and I&lading l*OOO mm )
~$&e&$dg shall show no crack or loss of * .‘I
8;4 Feet Teist -r NoidiitiI Ciiniibct6i Diameters OifiM I*()00 mm ) : ; 2 ‘.i :
.! Test not applicable.
NOTE - The nominal Andex D.
resistance is given ip
6 ELONGATION
The elongation at fracture and tensile strength shall, not be less than ,the values giv,en in Table 3.
9 HEAT SHOCK
9.1 Nominal Conductor Diameters Up to and Including l-600 mm
Table 3 Elongatioq
The coating shall show no crack. The mandrel diameter and the minimum heat shock tempera- ture shall be as specified in the relevent part of this standard.
Nominal Conductor Diameter
r-_A- *----- Over Up to and
Including mm mm
(1) (2) - 0’400
0’400’ 1’000 1’000 2’000 2’000 5’000
Egp;
Percent
(3) 10 12 I5
15
Tensile Strength Minimum
N.mm-’
(4) Under
consideration
9.2 Nominal Conductor Diameters Over 1.600 mm
7 SPRINGINESS
Test not applicable.
8 FLEXIBILITY AND ADHERENCE
8.1 Mandrel Winding Test ( Nondinal Conductor Diameters Up to and Including l-600 mm )
The coating shall show no crack after the wirt has been wound on a mandrel as specified in Table 4.
Table 4 Mandrel Winding
Nominal Condoctor Diameter
7__-h__--~ Over -Up to and
Including mm mm
(1) (2)
1’600
‘)D is the overall diameter of wire.
Mandrel Diameter
mm
(3)
3 9=,
4
8.2 Stretching Test ( Nominal Conductor Diame- ters Over l-600 mm )
The coating shall show no crack after the wire has been elongated 15 percent or .up to the breaking point.
The coating shall show no crack after having been elongated for the value given in relevant part of this standard. The minimum heat shock temperature is given in the relevant part of this standard.
10 CUT-THROUGH
For requirements see the relevant part of this standard.
11 RESISTANCE TO ABRASION
For requirements see relevant part of this standard.
12 RESISTANCE TO SOLVENTS
Standard Solvent
Using a pencil of hardness +I’ the coating shall not be removed.
13 BREAKDOWN VOLTAGE
The wire shall meet the requirements given in 13.1 and 13.2 respectively, when tested at room temperature and at elevated temperature when this is required by the purchaser.
The elevated temperature is given in the relevant part of this ‘standard.
13.1 .Nomhuti Conductor Diameters Up to and Incloding 2-500 mm
At least four of the five specimens tested shall not break down at a voltage less than, or ,equal to that given in Table 5. :,’
13.2 Nominal Conductor Diameters Over 2500 mm
‘i,’ I
: I
At least four of the five specimens tested shall not break down iat a voltage less than or eaual to that given inTaMe ‘ti. -
Nominal Cendnctdr Diameter
mm
(1) I_P
0’250
0’280
0’315
0’355
0’400
0’450
0’500
0’560
0’630
0’710’
0’800
0:900
1 .otio up to and including
2’500
Minimum Breakdown Vope ( r. m. s .Valne 1 i i
, , ,,
;/,
Grade 1 and Grade 1B
Room Elevated temperature temperatm
(2) (3)
2 100
2 200
2 200
2 300
2 300
2 300
2 400
2 500
2600
2600
2 600
2 700
1 600
1 700
1 700
1 700
1700
1 700
1 800 ‘1; 9tJo
2000
2 000
2000
2000
2 700 2000
I -_
*e
--
7
-_: I\oom
temperature
-‘(4)
-
‘I’
Elevated temperature
, (.?J.,
Elevated temperature ,*
(7‘) a -
9 900
‘4000,
4 100
‘4 300
4 400
4 400
4 600
4 600
4 800
4 800
4 900
5 000
2900
,3 000
3’ 100
3 200
3 300
3 300
3 500
3 500
3600
3600
3 700
3 800
Room temperature
‘(‘6 ) - -_
5 500
5 800
6 100
6 400
6 600
6 800
7000
7 100
7 100
7 200
7 400
7600
4100
4 400
4 600
4 800
5000
5100
5 300
5 300
5 300
5 400
5600
5 700
5 000 3 800 7 600 5 700
- NOTE - For intermediate nominal conductor diameters, the figure of the next largest nominal conductor diameter shall be taken.
Grade 2 and Grad& ‘2B Grade 3 I
I-
Table 6 Breakdown Voltage
( Clause 13.2 )
. .
Nominal Conductor Diameter
Mloimum Breakdown Vo:tlpe ( r. m. s. Value )
Grade 1 and Grade 1B Grade 2 and Grade 2B Grade 3
-
mm (1)
Room Elevated Room Elevated Room Elevated temperature temperature temperature temperature temperature temperature
(2) (3) (4) ’ (5) (6) (7)
-
Over 2’500 1 300 1 000 2 500 1 900 3 800 2 900
I ,.
, “,. - . . .--.-...__ ^.. _ _ ” ,_ ,.. a. -. .-._
.?
I$13730 ( Pari Q/S& 3 ) : 1994
14 CONTINUITY OF INSULATION ( NOMINAL CONDUCTOR DIAMETERS UP TO AND INCLUDING l-600 mm )
The number of faults per 30 m of wire shall not axceed the values given in Table 7. --
I5 TEMPERATURE INDEX
The test shall be carried out on a wirehaving a nominal conductor diameter of l-000 mm, Grade 2, unless otherwise agreed between the purchaser and the supplier.
When unvarnished specimens are tested in accordance with the method given in IS 5825 : 1993, the temperature corresponding to an extrapolated life of 20 000 h shall not be less than the temperature given in the relevant Indian Standard and the measured life at the lowest test temperature shall not be less than 5 000 h.
When required by a purchaser, the supplier of the enamelled wire shall supply evidence that the wire meets the requirements for the tempe- rature index.
NOTE - The temperature index based on an extra- polated life of 20 000 h relates to enamelled wire tested unvarnished and not as part of an insulation system. The temperature in degrees Celsius corres- ponding to the temperature index is not necessarily that at which it is recommended that the wire be operated and this will depend on many factors, including the type of equipment involved.
19 RESISTANCE TO REFRIGERANTS
For requirements see the relevant part of this standard.
17 SOLDERABILITY
Test not applicable.
18 HEAT OR SOLVENT BONDING
For requirements see the relevant part of this standard.
19 DIELECTRIC DISSIPATION FACTOR
For requirements see the relevant part of this standard.
20 RESISTANCE TO TRANSFORMER OIL
For requirements see the relevant part of this .standard.
21 LOSS OF MASS
For requirements see the relevant part of this standard.
22 HIGH TEMPERATURE FAILURE
For requirements see the relevant part of this standard.
30 PACKAGING
The kind of packaging may influence certain properties of the wire, for example spring back. Therefore the kind of packaging, for example the type of spools/reels shall be agreed between the purchaser and the supplier when supplied in spools/reels, it shall conform to IS 482.
The wire shall be evenly and compactly wound on spools or placed in containers. No spool or container shall contain more than one length of wire unless agreed to by the purchaser and the supplier. Marking of the label when there is more ‘than one length and/or identification of the separate lengths in the package, shall be agreed to by the purchaser and the supplier.
Where wn-es are delivered in coils, the dimen- sions and the maximum weights of such coils shall be agreed between the purchaser and the supplier. Any additional protection for coils shall also be agreed between the purchaser and the supplier.
Table 7 Continuity of Insulation -__ i ,_
( Clause 14 j- ‘. ,-- -.,
Nominal Conductor Diameter
mm
Maximom Nomber of Faults per 30 m
Up to and Grade 1 Grade 2 Grade 3 Over
1nc1~2?ng and Grade 1B and Grade 2B
(1) (3) (4) (5)
__~ -----P-
.- _ 1’600 25 i 10 .I 5
6
IS~13730 ( Part O/&c 3 ) : 1994
ANNEX A ( INFORMATJ\rE) .
( Clause 4.1 ) ,
DIMENSIONS FOR INTERMEDIATE NFMIN& CONDUCTOR DIAMETERS ( R40 )
Intermediate nominal coilductor diameters from which the use? may select intermediate for technical reasons,
A-l ENAMELLED WIRES WITHOUT A BONDING LAYER
Table 8 Dimensions of ~nnnmel~ed Wires ( R40 )
( chuk 4.1 )
sizes only
-
Nominal Conductor Conductor Tolerance Diameter I!I
Minimum hcrease Due to the rosulation
Maximum Overall Diameter
mm -_
mm _ _L
mm
(1)
‘mm
(2) ’
Grade 1
(3)
Grade 2
(4)
Grade 3
(5)
Grade 1 Grade 2
(6) (7)
0’265 0.004 ’ 0’018 0’033 0’050 0’297
0’300 0’004 0‘019 0’035 0’053 0’334
0’335 0’004 0’020 0’038 0’057 0’372
0’375 0’005 0’021 0’040 0’060 0’414
0’425 0’005 0’022 0’042 0’064 0’466
0’314
0’352
0’391
0’434
0’488
0’475 0’005 0’024 0’045 0’067 0’519 0’541
0’530 0’006 0’025 0’047 0’011 0’576 0’600
0’600 0’006 0’027 0’050 0’075 0’649 0’674
0’670 0’007 P.028 0’053 0’080 0’722 0’749
0’750 0’008 0’030 0’056 0’085 0’805 0’834
0’850 0009 0’032 0’060 0’090 0’909 0’939
0’950 0’010 0’034 0’063 0’095 1’012 1’044
1’060 0’011 0’034 0’065 0’096 1’124 1’157
1’180 0’012 0’035 0’067 0’100 1’246 1’279
1’320 0’013 0’036 0’069 0’103 1’388 1’422
1’500 0’015 0’038 0’071 0’107 1’570 1’606
1’700 0017 0’039 0’073 0.110 1 772 1’809
1’900 0’019 CO40 0’075 0’113 1’974 2’012
2’120 0’021 0’041 0’077 0’116 2’196 2’235
2’360 0’024 0’042 0’079 0’119 2’438 2’478”
2’650 0’027 0’043 0’081 0’123 2’730 2’772
3’000 0’030 0’045 0%84 0’127 3’083 3’126
3’350 0’034 0’046 0’086 0’130 3 ‘435 3’479
3’750 01038 0’047 0’089 0’134 3’838 3’883
4’250 0’043 0’049 0’092 0’138 4’34 1 4’387
4 750 0’048 0’050 0’094 0’142 4’843 4’891
-
-
-
-
Grade 3
(8)
0’330
0’369
0 408
0’453
0’508
0’562
0’623
0’698
0’774
0’861
0’968
1’074
1’188
1’311
1’455
1’640
1’844
2’048
2’272
-’ 2’516
2’811
3’166
3’521
3.926
4.4&
4’936
NOTE - Minimum overall diameter requirements may be used provided they are based on the minimum increases. The calculation is given in Annex B.
A-2 ENAMELLED WIRES WITH A BONDING. EAYER ’
Table 9 Dimensions of Enan&led ‘&~~‘$t~ a Bonding Layer ( R40 )
( czar&%? 4.1 ) ’
.Nomiqal Conductor
Coodaqtor Toletahce
Diameter zk mm mm
!‘)S --
0’265 0’300
0’335 0’375
0’425 0’475
0’530
0’600 0’670
0’750
0’850 0’950
1’060
1’180
1’320
1’500
1’700
‘1’900
(2)
0’004
0’004
OYItj4
O’W5
o*oqs O~ocis
0.46
0’006
o.Otj7
OIIQ8
o.od9
0’010
0’011
0’012
0’013
0.015
0’017
0’0$9
Minimum, Increase Due to the Iasalatibi’
mm
GraP3e) lB 0’637
0’039
0.041
0’043
0’045
0’048
0’049
0’052
0’054
0’057
0.060
0’063
0’064
0.065
0’067
0’070
0.072
0’074
0’052
0’055
0’059
0’062
0’065
0’069
0’071
0’075
0’079 V* 0’083
o,osi
0’092
0.095
0’097
0’100
0’103
&IO6
O.lO@
i:, Maximom Diameter ’
mm ___-
.Grade 1; (5)
Grade 2B (6)
0’316 0’333
0’354 0’372
0.39j 0’412
0’436 0’456
0’489 0 511
0’543 0’565
0’60d 0’624
0’674 0’699
0’748 0’775
0’832 $8‘61
0’937 a.967
1’041 1, ‘073
1’154 1’187
1’276 1’309
1.419 1’453
1’602 1’638
1’805 1’842
2’008 2’046
NOTE - Minimum overall diameter requirements may be used provided they are based on the minimum mcreases. The calculation is given in Annex B.
ANNEX B
(INFORMATIVE) /
‘I’_ ’ ( Ann&x A, Tabh 8 and 9’ ) i
bfETklc?D FOR THE CfLC~LATION kM&~&dvhf @vERALz DIAMETER
The ruinin& oveiall ,:
on the follOwin& basis: diameters (ire calculated
/ The rpinifirum ojerall &meters are calculated
Grade l! Nominal conductor diameter + on fly foll,o,wing / basis: 1
1 Vl ,+ j minimum incrkase Gyde.1; .: ‘. %dhductor diahkter +
Grade 2- Maximum overall diameter Grade GfadeLlB N&minal
mihimum increase Grade 1B; and 8Wh:,<;;,,. 1 + O-001 mm; and z .I ,, b ‘>.I I II ..,:r )~),, *’
Grade 3. Maximum avera~._diameter..~irde _... _.~Lad!%~&!bh&d@J~ :o;~~$ll...di~~e~~~~~ade 2 + O*OOl mm. 1B + O+OOl mm.
8
ANNEX'C c ( INEXUMATIYE )
. METHOD FOR THE CALCULATION OF LINEAR RESISTANCE
The limits of electrical resistance are calculated The linear resistance is calculated from: on the following basis. 1
&,in = pmia X @ msx ( i2 111-l 1 C-l FOR CONDUCTOR DIAMETERS TO AND
R mftx = pmax X 4-l min ( fJ m-1 1 l-000 mm ‘.where
The minimum and the maximum values of resis- Pmin = l/36-2 0 mm’ m-1; tance are calculated from the minimum and maximum values of the resistivity by taking into
Pmax = l/35*5 Q mm* m-1; and I
account for each conductor diameter the rele- vant dimensional tolerance.
q’= cross-section of the conductor in square millimetres.
ANNEX I3 ’ : : ;
(Ch.w5)
RESISTANCE
Nominal resistance values are calculated on the basis of the nominal conductor diameter and a
( given in Table 10 ) for nominal conductor diameters up to and including 1400 mm are
nominal resistivity of l/35*85 ohm sq mm/m. derived from calculations made according to
The minimum and maximum resistance figures Annex C
9
IS 13730 ( P&t o/&c 3 ) : 1994
Table 10 Eltitrical Resistances
Nominal Conductor Diameter I
RT:$;e
mm Minimum
(1) (2) Not!?1 MaT;lum
0’250 0’545 2 0’568 3 0’592 7
0’280 0’436 1 0’453 0 0’470 8
0’315 0’345 6 . 0’357 9 0’370 8
0’355 0’272 9 0’281 8 0’291 1
0’400 0’214 4 0’222 0 0’229 9
- 0’450 0’1699 0‘175 4 0’181 1
0’500 0’137 9 0’142 1 0’146 4
0’560 0’109 8 0’113 3 0’116 9
0.630 0’087 0 0’089 5 0’092 1
0’7aO 0’068 4 0’070 5 0’072 6
0’800 0’053 9 0’055 5 0’057 2
0’900 0’042 6 0’043 8 0’045 2
1’000 0’034 5 0’035 5 0’036 6
1’120 0’028 3 0’029 2
1’250 0’022 7 0’023 4
1’400 0’018 1 0’018 7
1’600 - 0’013 9 0’014 3
1’800 0’011 0 0’011 3
2’000 - 0’008 9 0’009 1
2’240 0’007 1 0’007 3
2’500 0’005 7 0’005 9
2’800 0’004 5 0’004 7
3’150 0’003 6 0’003 7
3’550 0’002 8 0’002 9
4’000 - 0’002 2 0’002 3 4’500 0’0018 0’001 8
5’000 - 0’0014 0‘001 5
10
.
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