KENYA STANDARD                 KS 194: 2018 
ICS 29.035.01  
 
 
                  
 
 
 
 
 
 
 
 
 
 
 
Specification for pvc -insulated cables 
for electricity supply  
 
(Third Revision, 2018) 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
PUBLIC REVIEW DRAFT , FEBRUARY  2018 
 
 
 
 
 
 
   
   
 
 
TECHNICAL COMMITTEE REPRESENTATION  
 
The following organizations were represented on the Technical Committee:  
 
Kenya Power and Lighting Co. Ltd.  
Metsec Cables  
Kenwest Cables Ltd.  
Consumer Information Network  
Jomo Kenyatta University of Science  and Technology  
SGS(K)  
KIRDI  
Kengen  
Taifa Cables  
Cable Connect  
East African cables  
Rural Electrification Authority  
University Of Nairobi  
ASL Cables  
Intertek  
Kenya Bureau of Standards — Secretariat  
 
 
 
 
 
 
 
 
 
REVISION  OF KENYA STANDARDS  
 
In order  to keep abreast of progress in industry, Kenya  Standards shall be regularly reviewed.  Suggestions for 
improvements to published standards, addressed to the Managing Director, Kenya Bureau of Standards, are 
welcome. 
 
 
 
 
 
 
© Kenya Bureau of Standards, 2016  
Copyright. Users are reminded that by virtue of Section 25 of the Copyright Act, Cap. 12 of 2001 of the Laws of Kenya, copyri ght 
subsists in all Kenya Standards and except as provide d under Section 26 of this Act, no Kenya Standard produced by Kenya Bureau of  
Standards may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in  writing  
from the Managing Director.  
  
  KENYA STANDARD                           KS 194: 2018  
   
 
 
 
 
 
 
 
 
 
 
 
 
Specification for pvc -insulated cables 
for electricity supply  
 
(Third Revision, 2018)  
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
KENYA BUREAU OF STANDARDS (KEBS)  
 
Head  Office:  P.O. Box 54974, Nairobi -00200, Tel.: (+254  020) 605490, 602350, Fax: (+254  020)  604031  
E-Mail: info@kebs.org,  Web:http://www.kebs.org   
 
Coast Region     Lake Region          North Rift Region  
P.O. Box 99376, Mombasa -80100   P.O. Box 2949, Kisumu -40100        P.O. Box 2138, Nakuru -20100  
Tel.: (+254  041) 229563, 230939/40  Tel.: (+2 54 057) 23549, 22396        Tel.: (+254 051) 210553, 210555  
Fax: (+254  041) 229448    Fax: (+254 057) 21814   
 KS 194: 1990                   ©KEBS    
 2  
Fore word 
 
The third revision of this Kenya Standard was prepared by the Cables and Conductors  Technical Commi ttee 
under the guidance of the Standards Projects Committee, and it is in accordance with the procedures of the 
Kenya Bureau of Standards.  
 
The first revision of t his standard, was approved by the National Standards Council in 1987, had been based 
on various amendments which had been issued by the BSI to BS 6346: 1967, which the first issue of this 
Kenya Standard had been based on.  
 
Towards the end of 1987, a newly revised edition of the British Standard, namely, BS 6346: 1987, was 
issued.  It replaced the 1967 edition.  
 
After studying this new edition, the Technical Committee decided that the first revision should be revised so 
as to be in line with the latest  version of the British Standard.  (It should be noted that IEC has so far not 
issued a similar standard.)  
 
Requirements for cables with concentric neutral copper conductors, which had been covered by the previous 
two editions, are not specified in this se cond revision.  These are now to be covered in another standard, 
which is under preparation.  
 
Attention is drawn to the recommendations for the selection, installation and operation of PVC -insulated 
cables, given in Appendices A and B.  
 
This third revision  addresses  requirements  on embossing, and  the gap specified between cable legends.  
 
Acknowledgement is made for the assistance received from these sources.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 ©KEBS                                                                            KS 194: 1990
     
 3  
 
C O N T E N T S  
 
Clause           Page  
 
1. Scope …………………………………………………… …………………………………………3  
 
2. Definitions ………………………………………………………………………………………….4  
 
3. Voltage designation ……………………………………………………………………………….5  
 
4. Conductors …………………………………………………………………………………………5  
 
5. Insulation ……………………………………………………………………………………………5  
 
6. Identification of cores ………………………………    ……………………………………………6  
 
7. Laying -up ……………………………………………………………………………………………6  
 
8. Bedding ……………………………..………………………………………………………………7  
 
9. Armour ………………………………………………………………………………………………7  
 
10. Oversheath …………………………………………………………………………………………9  
 
11. Cable marking and end sealing …………………… ………… …………………………………10  
 
12. Schedule of tests ………………………………… ………………………………………………11  
 
13. Test conditions …………………………… ………………………………………………………11  
 
14. Routine tests ………………………………………………………………………………………14  
 
15. Regular sample tests ………………………..……………………………………………………16  
 
16. Type tests …    ……………………… ……………………………………………………………18  
 
 
A P P E N D I C E S  
 
 
  A – Recommendations for selection and operation of PVC -insulated cables ………..20  
 
  B – Recommendations for installation of PVC -insulated cables ………………………21  
 
  C – Information required with enquiry and or der ………………………………………..24  
 
  D – Mechanical tests ………………………………………………………………………25  
 
  E – Resistance of conductor and armour, and armour cross -sectional areas …….. 26  
 
 
 
 
 
 
 
 
 
 
 KS 194: 1990                   ©KEBS    
 4  
 
 
 
KENYA STANDARD  
 
SPECIFICATION FOR PVC -INSULATED CABLES FOR ELECTRICITY SUPPLY  
 
(SECOND REVISION, 1990)  
 
 
 
1. SCOPE  
 
This Kenya Standard gives requirements and dimensions for PVC -insulated cables for operation at 
voltage up to and including 1 900 V to armour or earth and 3 300 V between conductors.  
 
The cables have been designed for  general (including underground) use where the combination of 
ambient temperature and temperature rise due to load results in a conductor temperature not 
exceeding 700C. 
 
The cables included in the standard are as follows:  
 
1.1 600/1 000 V CABLES  
 
1.1.1  Single-core Copper Conductor:  
 
(a) Unarmoured, sheathed.  
 
(b) Wire-armoured, sheathed.  
 
1.1.2  Single -core Solid Aluminium Conductor:  
 
(a) Unarmoured, sheathed.  
 
(b) Wire-armoured, sheathed.  
 
(c) Aluminium strip -armoured, sheathed.  
 
1.1.3  Single -core Solid Sectional Alum inium Conductor:  
 
(a) Unarmoured, sheathed.  
 
(b) Wire-armoured, sheathed.  
 
(c) Aluminium strip -armoured, sheathed.  
 
1.1.4  Two-, Three - and Four -core Copper Conductor:  
 
(a) Unarmoured, sheathed.  
 
(b) Wire-armoured, sheathed.  
 
1.1.5  Two-, Three - and Four -core Solid Aluminiu m Copper Conductor:  
 
(a) Unarmoured, sheathed.  
 
(b) Wire-armoured, sheathed.  
 
(c) Aluminium strip -armoured, sheathed.  
 
1.1.6  Multicore Auxiliary Copper Conductor:  
 ©KEBS                                                                            KS 194: 1990
     
 5 (a) Wire-armoured, sheathed.  
1.2 1 900/3 300 V CABLES  
 
1.2.1  Single -core Copper Conductor:  
 
(a) Wire-armoured, s heathed.  
 
1.2.2  Single -core Solid Aluminium Conductor:  
 
(a) Wire-armoured, sheathed.  
 
(b) Aluminium strip -armoured, sheathed.  
 
1.2.3  Single -core Solid Sectoral Aluminium Conductor:  
 
(a) Wire-armoured, sheathed.  
 
(b) Aluminium strip -armoured, sheathed.  
 
1.2.4  Three -core Co pper Conductor:  
 
(a) Wire-armoured, sheathed.  
 
1.2.5  Three -core Solid Aluminium Conductor:  
 
(a) Wire-armoured, sheathed.  
 
(b) Aluminium strip -armoured, sheathed.  
 
NOTE:  Appendix A gives recommendations for the selection and operation of cables, while  
recommendations for the installation of cables are given in Appendix B, and Appendix C lists 
information that should be given in any enquiry or order.  
 
 
2.          NORMATIVE REFERENCES  
 
The following referenced documents are indispensable for the application of this stan dard. 
For dated references, only the edition cited applies. For undated references, the latest 
edition of the referenced document (including any amendments) applies.  
          
KS 178:1980  Glossary of terms related to cables, conductors and accessories for 
electricity supply.  
 
KS 188 :1997  Specification for PVC insulations and sheath s of electric cables and cords  
 
KS EAS 115:1999  Electric cables - Spark testing - Test method.  
 
  KS 187:1987  
Specification for conductors of insulated cables (Second Edition).  
 
KS 863:1988  Test methods for spark testing of electric cables.  
 
KS 191 -1:1987  Specification for test on electric cables under fire conditions - Part 1: Test 
on single vertical insulated wire or cable.  
 
KS 662  Kenya wiring regulations  
 KS 194: 1990                   ©KEBS    
 6 KS 290:1981  Specificatio n for mild steel wire for armouring of electric cables.  
 
 
 
 
2.  DEFINITIONS  
 
 
For the purpose of this Kenya Standard the following definitions together with the relevant definitions 
given in KS 04 -178*, shall apply:  
 
_______________________________________ ____________________________________  
 
 * Glossary of terms related to cables, conductors and accessories for electricity supply.  
 
 
2.1 Rated Voltage, Uo — The nominal power -frequency voltage earth for which the cable is suitable.  
 
2.2 Rated Voltage  — The n ominal power -frequency voltage between phase conductors for which the 
cable is suitable.  
 
2.3 Maximum Voltage, Um  — The maximum sustained power -frequency voltage between phase 
conductors, for which the cable is suitable.  
 
2.4 Nominal Value — The value by wh ich a quantity is designated and which is often used in tables (of 
this standard).  
 
 NOTE:  Usually, in this standard, nominal values give rise to values to be checked by measurements 
taking into account specified tolerances.  
 
2.5 Approximate Value  — A valu e which is only indicative.  
 
 NOTE:  In this standard, values described as ‘approximate’ do not constitute requirements to be 
checked by measurements.  
 
         
 
               
 
             
 
3.  VOLTAGE DESIGNATION  
  
The cables shall be designated by th e rated voltages Uo and U, expressed in the form Uo/U. 
 
 The rated voltages recognized for the purposes of this standard are 600/1 000 V and 1 900/3 300 V.  
 
The maximum designated voltages ( Um) for the purposes of this standard for 600/1 000 V and 1 
900/3 V cables are recognized as 1 100 V and 3 600 V respectively.  
 
NOTE:  Guidance on the selection of cables of appropriate voltage designations for particular 
systems is given in clause A2.  
 
4. CONDUCTORS  
 
 The conductors shall be either annealed copper conduc tors or solid aluminium conductors, as 
indicated in Tables 11 to 25 inclusive, and shall comply with the requirements of KS 04 -187*.  It is 
permissible for the copper wire to be tinned at the manufacturer’s discretion.  The conductors shall 
be circular, ci rcular sectoral or shaped solid (class 1), or circular, circular compacted or shaped 
stranded, (class 2), as indicated for the type and rated voltage of the cable in Cables 11 to 25 
inclusive.  
 ©KEBS                                                                            KS 194: 1990
     
 7 5. INSULATION  
 
5.1 General — The insulation shall be a PVC com pound complying with Type TI 1 of KS 04 -188†.  The 
insulation shall be applied by an extrusion process and shall form a compact and homogeneous 
body.  Compliance shall be checked by visual examination.  
 
_____________________________________________________ _____________________________  
 
* Specification for conductors of insulated cables.  
 
† Specification for PVC insulations and sheaths for electric cables and cords (First Revision).  The 
insulation shall comply with the compatibility requirement of Clause 16 .2. 
 
5.2 Spark Testing of Insulation — The core insulation comply with the requirements for spark testing 
specified in KS EAS 115 *, when tested in accordance with that standard.  
 
5.3 Thickness of Insulation — The thickness of insulation, when  determined by taking the average of a 
measurements in accordance with Clause 15.2, shall be not less than the value given in Tables 11 to 
25, as appropriate, and the smallest of the measured values shall not fall below the value given in 
Tables 11 to 25, as appropriate, by more than (10 per cent +0.1 mm).  
 
6. IDENTIFICATION OF CORES  
 
 The cores of all cables shall be identified by colours or by numbers, in accordance with the following 
sequence:  
 
 NUMBER OF CORES   NUMBERS   IDENTIFICATION  
 
 Single -core    -  Red or black  
 
 Two-core    -  Red, black  
 
 Three -core    -  Red, yellow, blue  
 
 Four-core    -  Red, yellow, blue, black  
 
 Five-core   1, 2, 3, 4,  
(Auxiliary  cables)    5 and upwards  
 
 The colours shall be either throughout the insulation or on its external surface.  
 
 The numbers shall be printed in a colour which contrasts with the cores.  The intervals between 
adjacent numbers shall not exceed 70 mm.  
 
 Compliance with these requirements shall be verified by visual examination and by measurement s. 
 
              NOTE:  As per request  of the customer,  the harmonized color codes can be found in Annex F  
 
7. LAYING -UP 
 
 The cores of cables having two or more cores up to and including seven cores shall be laid with a 
right-hand or right -hand left -hand alternating direction of lay.  For multi -core auxiliary cables having 
seven or more cores, the direction of lay shall alternate for each successive layer.  Compliance with 
these requirements shall be checked by visual examination.  Where necessary, synthet ic fillers, 
which may be applied integrally with either the bedding of armoured cable or the sheath of un -
armoured cable, shall be used to form a compact and reasonably circular cable.  
 
 It is permissible for a synthetic binder tape to be used over the lai d-up cores at the manufacturer’s 
discretion.  The suitability  
 
  
* Test methods for spark testing of electric cables.  KS 194: 1990                   ©KEBS    
 8  
 of the fillers and binder tape, if used, shall be determined by compliance, of the cable, with the 
compatibility requirements given in C lause 16.2.  
 
8. BEDDING  
 
8.1 The bending shall be compatible with the insulating material.  Compatibility shall be determined in 
accordance with Clause 16.2.  
 
8.2 Single -core cables  — The bedding of armoured 600/1 000 v cables shall consist of an extruded layer 
of polymeric compound having a tensile strength of not less than 4 N/mm2 and an elongation at 
break of not less than 50 per cent , when the test is done in accordance with  KS 188 .  The bedding of 
1 900/3 300 v cables shall consist of an extruded layer  of Type TM 1 or Type 6 PVC compound 
complying with KS 04 -188. 
 
8.3 Multicore Cables  — The bedding of armoured 600/1 000 v cables shall consist of an extruded layer 
of polymeric compound having a tensile strength of not less than 4 N/mm2 and an elongation at 
break of not less than 50 per cent.  It is permissible for cables having a nominal conductor cross -
sectional area of 10 mm2 and above to have a taped bedding, as indicated in Tables 14 to 20, 
comprising two or more layers of PVC tape or other synthetic tape complying with Clause with 
Clause 8.4.  The bedding of 1 900/3 300 v cables shall consist of an extruded layer of Type TM 1 or 
Type 6 PVC compound complying with KS 04 -188. 
 
 Where the bedding is applied integrally with fillers, it shall be possible t o strip it from the cable 
without damaging the insulation of the cores.  
 
8.4 Taped Bedding Gaps  — When taped bedding is used for 600/1 000 v cables, it shall be applied such 
that any gaps between adjacent of each tape are not coincident through the thickne ss of the 
bedding.  
 
 If there is a gap between adjacent edges of each tape, it shall not exceed 15 per cent of the tape 
width, as determined by measurement in accordance with Clause 15.3.  
 
 NOTE:  The thickness of taped bedding (approximately 0.8 mm need no t be checked by 
measurement).  
 
8.5 Thickness of Extruded Bedding  — The minimum thickness of extruded bedding measured in 
accordance with Clause 15.2 shall not fall below the value given in Tables 12 to 26, as appropriate, 
by an amount more than (15 per cen t + 0.1 mm).  
 
9. ARMOUR  
 
9.1 General  — For armoured cables, the armour shall consist of a single layer of wires or aluminium 
strips having nominal dimensions as given in Tables 11 to 25, as appropriate.  The armour shall be 
applied helically with a left -hand lay for cables having up to and including seven cores.  For multicore 
auxiliary cables having more than seven cores, the direction of lay shall be opposite to that of the 
final layer of cores.  It is permissible for a binder tape to be applied between t he armour and the 
oversheath at the discretion of the manufacturer.  
 
9.2 Wire Armour  — Wire armour for cables having two or more cores shall consist of a single layer of 
galvanized steel wires.  Wire armour for single -core cables shall consist of a single layer of 
aluminium wires.  
 
 The armour wire shall comply with the following:  
 
(a) The diameter of the round armour wire, whether of galvanized steel or plain aluminium, 
determined in accordance with Clause D1 shall fall within the minimum and the maximum wire 
diameters specified in Table 1.  
 
(b) the mass of zinc coating of galvanized steel armour wire, determined in accordance with Clause 
D2 shall not be less than that given in Table 2.  
 
(c) The mechanical characteristics of the galvanized steel armour wires shall be s uch that when ©KEBS                                                                            KS 194: 1990
     
 9 subjected to the test given in Clause D3, none of the wires shall break.  
 
(d) The tensile strength of alumium armour wires when tested in accordance with Clause D4 shall 
be not less than 125 N/mm2. 
 
9.3 Aluminium Strip Armour  — The thickness and width of individual strips of aluminium armour, 
determined in accordance with Clause D5, shall not differ from the values specified in Tables 12, 14, 
16, 18, 21, or 23, as appropriate, by more than 10 per cent.  The tensile strength of individual strips 
of aluminium armour, when tested in accordance with Clause D4 shall be not less than 145 N/mm2. 
 
9.4 Joints  — Joints in steel wire armour shall be brazed or welded and any surface irregularity shall be 
removed.  Joints in aluminium wire or strip shall be mad e by cold pressusre of fusion welding and all 
surface irregularities shall then be removed.  
 
 A joint in any wire or strip shall be not less than 1 m from the nearest joint in any other armour wire 
or strip in the complete cable.  
 
9.5 Armour Resistance  — The d.c. resistance of the armour of the complete cable, measured and 
corrected to 200C in accordance with Clause 15.4, shall not exceed the appropriate value given in 
Table 29 to 33 (see Appendix E).  
 
 
TABLE 1.  DIAMETER OF ARMOUR WIRE  
 
NOMINAL WIRE DIAMETE R WIRE DIAMETER  
Minimum  Maximum  
mm mm mm 
0.9 0.85 0.95 
1.25 1.18 1.32 
1.6 1.51 1.69 
2.0 1.90 2.10 
2.5 2.37 2.63 
3.15 2.99 3.31 
 
 
 
 
 
 
 
 
 
 
 
TABLE 2.  MASS OF ZINC COATING  
 
NOMINAL DIAMETER  
OF ARMOUR WIRE  MINIMUM GAS OF ZINC COATING  
mm g/m2 
0.9 
1.25 
1.6 
2.0 
2.5 
3.15 112 
150 
172 
180 
195 
206 
 
 
10. OVERSHEATH  
 
10.1 The oversheath of unarmoured or armoured cable shall be an extruded layer of black PVC 
compound complying with Type TM of KS 04 -188. KS 194: 1990                   ©KEBS    
 10  
 The oversheath shall comply with the compatibility req uirements given in clause 16.2.  
 
 The oversheath of all armoured cables shall comply with the spark testing specified in KS 04 -863 
when tested in accordance with that standard.  
 
10.2 Thickness of Oversheath   
 
10.2.1  Unarmoured Cable  — The thickness of the oversheath on unarmoured cables, determined by taking 
the average of a number of measurements as described in Clause 15.2, shall be not less than the 
value given in Tables 11 to 19, as appropriate, and the smallest of the measured values shall not fell 
below the value in the table by more than (15 per cent + 0.1 mm).  
 
10.2.2  Armoured Cable  — The minimum thickness of the oversheath on armoured cables, measured in 
accordance with clause 15.2, shall not fall below the value given in Tables 11 to 25, as appropr iate, 
by more than (20 per cent + 0.2 mm).  
 
11. CABLE MARKING AND END SEALING  
 
11.1 End Marking  — The ends of each factory length of cable having three or more cores of conductor 
size 25 mm2 and above, may be marked red or green.  The end at whi ch the sequence of core 
colours, as given in Clause 6, is clockwise may be marked red and other end may be marked green.  
 
  
 
11.2 Embossing of Oversheath — The external surface of the PVC oversh eath shall be embossed with an 
identification of the manufacturer and one of the following legends, as appropriate.  
 
 VOLTAGE DESIGNATION    LEGEND  
 
 (i) 600/1 000     electric cable 600/1 000 V  
 
 (ii) 1 900/3 300     electric cable  
       3 300 V  
 
 (iii) 600/1 000 auxiliary    electric cable  
  cables (five -core   600/1 000 V aux.  
  And above)  
 
 For tabulated approximate overall diameters above 15 mm, the legend may be embossed along two 
or more lines approximately equally spaced around the circumference.  
 
 
 
 For tabulated approximate overall diameters of 15 mm and smaller, the legend shall be embossed 
along one or more lines.  
 
 The letters and figures shall be raised and shall consist of upright block characters.  In the legend, 
the maximum size of the ch aracters shall be 13 mm and the minimum size shall be 15 per cent of 
the tabulated approximate overall diameter of the cable or 3 mm, whichever is the greater.  The gap 
between the end of one legend and the beginning of the next shall be not greater than 550 mm.  
 
 Compliance shall be checked by visual examination and by measurement.  
 
11.3 Cable Size Marking  
 
11.3.1  Single -core Cables  — Single -core cables having a cross -sectional area of 4 mm2 and above shall be 
marked with cable size in mm2. 
 
11.3.2  Two-core, Three -core, Four -core and Multi -core Cables  — All these cables shall be marked with 
cable size in mm2. 
 
11.4 Identification of Manufacturer  — A means of identifying the manufacturer shall be provided ©KEBS                                                                            KS 194: 1990
     
 11 throughout the length of the cable.  
 
11.5 End Sealin g — Both ends of every length of cable shall be sealed in such a manner that it includes 
the oversheath.  
 
 NOTE:  One example of end sealing is the use of close fitting plastic caps.  
 
12. SCHEDULE OF TESTS  
 
 Table 3 lists the complete range of tests applica ble to the cables covered by this standard and refers 
to the relevant clauses of the standard specifying the requirements and test methods.  The final 
column indicates, by means of the Symbols R, RS, and T, the category of each test.  
 
 The categories and c orresponding designations are as follows:  
 
(a) Routine tests (R)  — Tests made at the manufacturer’s works, or elsewhere, on all cables in the 
finished state or, as appropriate (e.g. spark test), during manufacture  
 
(b) Regular sample tests (RS)  — Tests made at the  manufacturer’s works, or elsewhere, in 
representative samples selected regularly from the production line at an agreed interval.  
 
(c) Type tests (T)  — Tests made on one or more samples of cable, of the same type and size, made 
to the same specifications and h aving the same essential details, to show that they comply with 
the requirements of this standard.  These tests, after they have been successfully completed, 
need not be repeated unless a repeat is deemed necessary by Kenya Bureau of Standards.  
 
13. TEST C ONDITIONS  
 
13.1.  Ambient Temperature  — Tests shall be made at an ambient temperature of 20 ± 150C unless 
otherwise specified in details for the particular test.  
 
13.1.  Frequency and Waveform of Power -Frequency Test Voltages  — Unless otherwise specified in the 
particular test, the frequency of the alternating test voltages shall be in the range of 49 Hz to 61 Hz.  
The waveform shall be substantially sinusoidal.  
 
 
 
 
 
 
 
 
 
 
 
TABLE 3.  SCHEDULE OF TESTS  
 
 
TEST  REQUIREMENT 
GIVEN IN  
CLAUSE (OF  
THIS STANDARD)   
TEST  METHOD   
CATEGORY  
Tests on components  
 
Conductor material and 
construction  
 
Insulation:  
 
(a) Material  
(b) Application  
(c) Spark test  
(d) Thickness   
 
4 
 
 
 
 
5.1 
5.1 
5.2 
5.3  
KS 04 -187 
 
 
 
 
 
KS 04 -188 
Visual examination  
KS 04 -863 
Clause 15.2 of this standard and   
RS 
 
 
 
 
 
T 
RS 
R 
RS KS 194: 1990                   ©KEBS    
 12  
 
Core identification  
 
Laid-up cores  
 
Bedding:  
 
(a) Taped bedding gap  
 
(b) Extruded:  
 
(i) Material 
characteristics  
 
(ii) Thickness  
 
Armour:  
 
(a) Wire armour:  
 
(i) Diameter  
 
(ii) Mass of zinc 
coating 
(galvanized 
steel wire only)  
 
(iii) Wrapping test    
      (galvanized    
     steel  wire only).   
 
6 
 
7 
 
 
 
8.4 
 
 
 
8.2 and 8.3  
 
 
8.5 
 
 
 
 
 
9.2 (a)  
 
 
9.2 (b)  
 
 
 
 
9.2 (c)  
 KS 04 -188 
 
Visual examination and measurement  
 
Visual examination  
 
 
 
Clause 15.3 of this standard  
 
 
 
KS 04 -188 
 
 
Clause 15.2 of this standard and KS 04 -
188 
 
 
 
 
 
Clause D1 of this standard  
 
 
Clause D2 of this standard  
 
 
 
Clause D3 of this standard  
 
  
 
RS 
 
RS 
 
 
 
RS 
 
 
 
T 
 
 
RS 
 
 
 
 
 
 
RS 
 
 
RS 
 
 
 
RS 
 
 
 
TABLE 3.  SCHEDULE OF TESTS (Cont’d)  
 
 
TEST  REQUIREMENT 
GIVEN IN  
CLAUSE (OF  
THIS STANDARD)   
TEST METHOD   
CATEGORY  
(iv) Tensile test   
      aluminium wire  
      only)  
 
(b) Aluminium strip armour:  
 
(i) Dimensions of 
individual strips  
 
(ii) Tensile test  
 
Oversheath:  
 
(a) Material  
 
(b) Thickness, unarmoured 
cable  
 
 
(c) Thickness, armoured 
cable  
  
 
9.2 (d)  
 
 
 
9.3 
 
 
9.3 
 
 
 
10.1 
 
10.2.1  
 
 
 
10.2.2  
 
 Clause D3 of  
this standard  
 
 
 
 
Clause D5 of  
this standard  
 
Clause D4 of  
this standard  
 
 
KS 04 -188 
 
Clause 15.2 of  
this standard  
and KS 04 -188 
 
Clause 15.2 of  
this standard  
and KS 04 -188  
RS 
 
 
 
 
 
RS 
 
 
RS 
 
 
T 
 
 
RS 
 
 
 
RS 
 ©KEBS                                                                            KS 194: 1990
     
 13  
(d) Spark test  
 
Tests on complete cable  
 
Cable markings  
 
 
 
Conductor re sistance  
 
 
Armour resistance  
 
 
Voltage test  
 
 
Insulation resistance test  
 
 
Compatibility test  
 
 
Test under fire conditions   
10.1 
 
 
 
11.1 to  
11.5 
 
 
14.2 
 
 
9.5 
 
 
14.3.1  
 
 
14.4.1  
 
 
5.1 and  
10 
 
15.5  
KS EAS 115  
 
 
 
Visual inspection  
and measurement,  
as appropria te 
 
Clause 14.2 of  
this standard  
 
Clause 15.4 of  
this standard  
 
Clause 14.3.2 of  
this standard  
 
Clause 14.4.2 of  
this standard  
 
Clause 16.2 of  
this standard  
 
KS 04 -191: Part 1*   
R 
 
 
 
 
R 
 
 
R 
 
 
 
RS 
 
 
R 
 
 
R 
 
 
T 
 
RS 
 
*  Flame -retardant characteristics of electric cables.  
 
 
14. ROUTINE TEST  
 
14.1 General  — Routine tests shall be as given in Table 4.  
 
 
TABLE 4.  ROUTINE TESTS  
 
TEST  REQUIREMENT GIVEN 
IN CLAUSE (OF THIS 
STANDARD)  TEST METHOD  
(i) Spark test on cores  
 
(ii) Spark test on  oversheath  
 
(iii) Visual examination and 
measurement of cable 
markings  
 
(iv) Conductor resistance  
 
(v) Voltage test on complete 
cable  
 
(vi) Insulation resistance  
 5.2 
 
10.1 
 
 
11.1 to 11.5  
 
 
14.2 
 
14.3.1  
 
 
14.4.1  
 KS 04 -863 
 
KS 04 -863 
 
 
          - 
 
 
KS 04 -187 
 
Clause 14.3.2 of  
this standard  
 
Clause 14.4.2 of  
this standard  
 
 
14.2 Conductor Resistance Test  — The d.c.  resistance of each conductor shall comply with KS 04 -187 
when measured and corrected to 200C in accordance with that standard.  
 
 NOTE:  For convenience, the maxi mum reistance values for annealed copper and aluminium 
conductors are given in Tables 29 to 33 (see Appendix E).  
 KS 194: 1990                   ©KEBS    
 14 14.3 Voltage Test on Complete Cables  
 
14.3.1  Requirement  — For multicore armoured cables, apply the voltage between conductors.  
 
 Make the tes t at room temperature using an alternating voltage, the values of single -phase test 
voltage for the rated voltages being given in Table 5.  If, for three -core cables rated at 1 900/3 V, the 
voltage test is carried out with a three -phase transformer, use a test voltage between the phases of 
1.73 times the values given in Column 3 of Table 5.  Increase the voltage gradually and maintain it 
as full value for 5 min.  
 
 
TABLE 5.  TEST VOLTAGE ON COMPLETE CABLES  
 
VOLTAGE DESIGNATION  ALTERNATING TEST VOLTAGE (R.M.S. ) 
Between Conductors  Between Any Conductor  
and Earth  
V 
 
6000/1 000  
 
1 900/3 300  V 
 
3 500  
 
10 000  V 
 
3 500  
 
5 800  
 
 
14.4 Insulation Resistance Test  
 
14.4.1  Requirement — After completion of the voltage test given in Clause 14.3, the insulation resistan ce 
between each conductor and the remaining conductors in the cable shall be measured in 
accordance with Clause 14.4.2, and shall be not less than the appropriate value given in Table 6.  
 
14.4.2  Method — Connect the remaining conductors in the cable to the  armour (if any).  Measure the 
insulation resistance after electrification with direct current for 1 min at not less than 500 V.  
 
 NOTE:  For multicore auxiliary cables, the cores may be connected in groups so that the insulation 
of each conductor is proved  with respect to all others.  
 
 
TABLE 6.  MINIMUM INSULATION RESISTANCE VALUES  
 
NOMINAL CROSS -SECTIONAL 
AREA OF CONDUCTOR  INSULATION RESISTANCE PER KILOMETER AT 200C 
600/1 000 V  1 900/3 300 V  
mm2 MΩ MΩ 
1.5 10 - 
2.5 9 - 
4.0 8 - 
6.0 7 - 
10.0 7 - 
16.0 6 10 
25.0 5 8 
35.0 5 7 
50.0 5 6 
 
 
TABLE 6.  MINIMUM INSULATION RESISTANCE VALUES (Cont’d.)  
 
NOMINAL CROSS -SECTIONAL  
AREA OF CONDUCTOR  INSULATION RESISTANCE PER KILOMETER AT 200C 
 
600/1 000 V  1 900/3 300 V  
mm2 MΩ MΩ 
70.0 5 6 
95 and above  5 5 
 
 ©KEBS                                                                            KS 194: 1990
     
 15 15. REGULAR SAMPLE TESTS  
 
15.1 General  — Regular sample tests shall be as given in Table 7.   
 
 
TABLE 7.  REGULAR SAMPLE TESTS  
 
TEST  REQUIREMENT GIVEN 
IN CLAUSE (OF THIS 
STANDARDS)  TEST METHOD  
Conductor material and construction  4 KS 04 -187 
Insulation thickne ss 5.3 Clause 15.2 of this standard 
and KS 04 -188 
Core identification  6 - 
Laid-up cores  7 - 
Taped bedding gap  8.4 Clause 15.3 of this standard  
Extruded bedding thickness  8.5 Clause 15.2 of this standard 
and KS 04 -188 
Armour resistance  9.5 Clause 15.4 of this standard  
Oversheath thickness  10.2 Clause 15.2 of this standard 
and KS 04 -188 
Wire armour diameter  9.2 (a)  Clause D1 of this standard  
Mass of zinc coating (galvanized steel 
wire only)  9.2 (b)  Clause D2 of this standard  
 
 
 
 
TABLE 7.  REGULAR SAMP LE TESTS (Cont’d)  
 
TEST  REQUIREMENT GIVEN IN 
CLAUSE (OF THIS 
STANDARDS)  TEST METHOD  
Wrapping test (galvanized steel 
wire only)  9.2 (c)  Clause D3 of this standard  
Tensile test (aluminium wire 
and aluminium strip armour 
only)  9.2 (d)  Clause D4 of this sta ndard  
Dimensions of aluminium strip 
armour  9.3 Clause D5 of this standard  
Fire test on single cables  15.5 KS 04 -191: Part 1  
 
 
15.2 Thickness Measurement  
 
15.2.1  Sampling  — Make the measurements of thickness of insulation, extruded bedding and oversheath  
listed in the schedule of the test requirements (see Table 3), on a sample taken from end of each 
drum length of cable selected for the test, having discarded any portion which may have suffered 
damage.  
 
15.2.2  Method — Take measurements for each componen t by the method specified in Clause 6 of KS 04 -
188. 
 
 For multicore cables, take measurements of insulation thickness on each core up to a maximum of 
four. 
 
 When determining the average thickness from several measurements, round the resultant value to 
0.1 mm, 0.05 mm being rounded upwards.  
 
 For the sample tests, make the measurements in accordance with KS 04 -188, but it is permitted to 
use a calibrated hand lens, except in cases of dispute, when the equipment specified in KS 04 -188 KS 194: 1990                   ©KEBS    
 16 shall be used.  
 
15.3 Measurement of the Gap Between Tapes of Taped Bedding — Measure the gap between the 
adjacent edges of each bedding tape at right angles to the tape, and also the tape width, on a 
sample of cable 300 mm long, taken not less than 150 mm from the end of a facto ry length.  
 
 Take the measurements by any suitable means in which error of determination does not exceed 0.5 
mm.  Measure the gaps at four positions approximately 50 mm apart along the length of the sample.  
 
15.4 Armour Resistance  — Determine the d.c. res istance of the armour by measuring the resistance of 
all the armour wires or strips of the completed cable connected together, and then correct the value 
from t0C, the determination temperature, to 200C using the temperature correction multiplication 
facto rs given in Tables 8.  
 
15.5 Test Four Flame Propagation of Single Cable — The finished cable shall comply with KS 04 -191: 
Part 1 for tests under fire conditions when tested in accordance with that standard.  
 
16. TYPE TESTS  
 
16.1 General  — Type tests shall be as given in Table 9.  
 
16.2 Compatibility Test  
 
16.2.1  Requirement  — When tested in accordance with Clause 16.2.2, the material shall comply with the 
values given in Table 10.  
 
 NOTE:  The test is intended to check that the insulation and oversheath are n ot liable to deteriorate 
due to contact with other components in the cable.  
 
16.2.2  Method  — Heat samples of completed cable in an oven for 7 days at 80 ± 20C using the procedure 
specified in Clause 8 of KS 04 -188. 
 
 After ageing, measure the tensile stren gth and elongation at break fo rthe insulation, oversheath and 
bedding in accordance with Clause 7 of KS 04 -188. 
 
 
TABLE 8.  TEMPERATURE CORRECTION MULTIPLICATION FACTORS  
 
 
TEMPERATURE OF 
ARMOUR AT TIME OF 
MEASUREMENT, t CORRECTION FACTOR, kt 
Galvanized S teel Wire Armour  Aluminium Wire or  
Strip Armour  
0C 
 
5 
6 
7 
8 
9 
 
10 
11 
12 
13 
14 
 
15 
16 
17 
18 
19  
 
1.072  
1.067  
1.062  
1.057  
1.052  
 
1.047  
1.042  
1.037  
1.033  
1.028  
 
1.023  
1.018  
0.014  
1.009  
1.005   
 
1.064  
1.059  
1.055  
0.050  
1.046  
 
1.042  
1.037  
1.033  
1.029  
1.025  
 
1.020 
1.016  
1.012  
1.008  
1.004  
 
 ©KEBS                                                                            KS 194: 1990
     
 17 TABLE 8.  TEMPERATURE CORRECTION MULTIPLICATION FACTORS (Cont’d.)  
 
 
 
TEMPERATURE OF ARMOUR 
AT TIME OF MEASUREMENT, 
t CORRECTION FACTOR, kt 
Galvanized Steel Wire Armour  Aluminium Wire or  
Strip Armour  
0C 
 
20 
21 
22 
23 
24 
 
25 
26 
27 
28 
29 
 
30 
31 
32 
33 
34 
35  
 
1.000  
0.996  
0.991  
0.987  
0.982  
 
0.978  
0.974  
0.969  
0.965  
0.961  
 
0.957  
0.953  
0.949  
0.945  
0.941  
0.937   
 
1.000  
0.996  
0.992  
0.984  
 
0.980  
0.977  
0.973  
0.969  
0.965  
 
 
0.962  
0.958  
0.954  
0.951  
0.947  
0.943  
 
NOTE:  The values of correcti on factor kt are based on a resistance temperature coefficient at 200C 
of 0.004 5 per cent 0C for galvanized steel wire and 0.004 0 per cent 0C for aluminium wire 
or strip.  
 
TABLE 9.  TYPE TESTS  
 
 
TEST   
REQUIREMENT GIVEN IN CLAUSE 
(OF THIS STANDARD)   
TEST M ETHOD  
Insulation material  5 KS 04 -188 
Extruded bedding material  8.2 and 8.3  KS 04 -288 
Oversheath material  10.1 KS 04 -188 
Compatibility test  5.1 and 10  Clause 16.2 of this standard 
and KS 04 -188 
 
 
 
A P P E N D I X  A  
 
RECOMMENDATIONS FOR SELECTION AND OPERATION OF  
PVC INSULATED CABLES  
 
1. TYPE OF FINISH  
 
 PVC oversheath provides protection against most corrosive and wet environments.  In particularly 
onerous cases, reference should be made to the cable manufacturer.  
 
2. VOLTAGE RATINGS  
 
 The selection of standard cables of appropriate voltage designations for particular supply systems 
depends on the system voltage and the system earthing arrangements.  To facilitate the selection of 
the cable, systems are divided into three categories.  
 KS 194: 1990                   ©KEBS    
 18 (a) Category A  — This category comprises those systems in which any phase conductor that comes 
in contact with earth or an earth or an earth conductor is automatically disconnected from the 
system.  
 
(b) Category B  — This category comprises those systems that, under fault conditio ns, are operated 
for a short time, not exceeding 8 h on any occasion, with one phase earthed.  
 
NOTE:  In a system where an earth fault is not automatically and promptly eliminated, the increased 
stresses on the insulation of cables during the earth fault ar e likely to affect the life of the cables to a 
certain degree.  If the system is expected to be operated fairly often with a sustained earth fault, it 
may be preferable to use cables suitable for category C.  In any case, for classification as category B 
the expected total duration of earth faults in any one year should not exceed 125.  
 
(c) Category C  — This comprises all systems that do not fall into categories A and B.  
 
Table 26 gives the lowest rated voltage of cable which should be used for an a.c. system a ccording 
to the system voltage and category.  
 
TABLE 26.  SELECTION OF CABLES FOR A.C. SYSTEMS  
 
SYSTEM VOLTAGE  
SYSTEM 
CATEGORY  MINIMUM 
RATED 
VOLTAGE OF 
CABLE,  
U0/U Nominal  
Voltage,  
U Maximum 
Sustained 
Voltage,  
Um 
kV 
 
Up to 1.0  
 
1.9 to 3.3  
 kV 
 
1.1 
 
3.6 
  
 
A, B or C  
 
A or B  kV 
 
0.6/1  
 
1.9/3.3  
 
 
The nominal system voltage, U, given in Table 26 is the nominal voltage between phases.  
 
The maximum sustained system voltage, Um, is the highest voltage between phases which may be 
sustained under normal conditio ns at any time and at any point in the system.  It excludes transient 
voltage variations, due, for example, to lightning impulses, fault conditions and rapid disconnection of 
loads.  
 
Single -core 600/1 000 V cables are suitable for d.c. systems operating at  up to 1 000 V to earth, and 
two-core 600/1 000 V cables are suitable for d.c. systems operating at up to 1 500 V between 
conductors.  Single -core 1 900/3 300 V cables are suitable for d.c. systems operating at up to 3 000 
V to earth.  However, considerati on should be given to the peak value when determining the voltage 
of a d.c. system derived from rectifiers, bearing in mind that smoothing does not modify the peak 
value when the rectifiers are operating on an open circuit.  
 
3. CURRENT RATINGS  
 
3.1 Cables installed in and around buildings — For the current ratings of cables installed in and around 
buildings, reference should be made to KS 04 -662*.  
 
3.2 Other installations  — For current ratings of cables installed in situations other than those covered by 
Clause A3.1, the cable manufacturer should be consulted for any special advice.  
 
 
A P P E N D I X  B  
 
RECOMMENDATIONS FOR INSTALLATION OF PVC -INSULATED CABLES  
 
B1. COMPLIANCE WITH REGULATIONS  
 
The cables specified in this standard should be installed in acco rdance with KS 04 -662 or any other ©KEBS                                                                            KS 194: 1990
     
 19 applicable national regulations.  
 
In special environments, the appropriate regulations and close of practice should be observed.  
 
B2. MINIMUM INSTALLATION RADIUS  
 
None of the cables specified in this standard should be be nt during installation to a radius smaller 
than that recommended Table 27.  
 
 
 
 
 
 
 
 
 
 
_______________________________________________________________________________  
 
*  Kenya wiring regulations.  
 
 
 
TABLE 27.  MINIMUM INSTALLATION RADIUS  
 
FINISH  OVERAL 
DIAME TER, D MINIMUM INTERNAL  
RADIUS OF BEND  
Circular copper conductor, 
unarmoured  Up to 10 mm  
 
Above 10 mm}  
Up to 25 mm  }  
 
Above 25 mm  3D 
4D 
6D 
Circular copper conductor, 
armoured  Any 6D 
Solid aluminium or shaped 
copper conductors, armoured 
or unarmoured  Any 8D 
 
 NOTE:  Whether possible, larger installation radii should be used.  
 
 
 
 
 
B3. MINIMUM TEMPERATURE DURING INSTALLATION  
 
Attention is drawn to the fact that, as the temperature decreases, PVC compounds become 
increasingly stiff and brittle, with the re sult that, if the cable is bent too quickly to too small a radius or 
is struck at temperatures in the region of 00C or lower, there is risk of shattering the PVC 
components.  
 
To avoid the risk of damage during handling, therefore, it is desirable that the cables specified in this 
standard should be installed only when both the cable and the ambient temperature are above 00C 
and have been so for the previous 24 h or where special precautions have been taken to maintain 
the cables above this temperature.  
 
B4. INSTALLATION PRACTICE  
 
Care should be exercised during installation to avoid any damage to cable coverings.  This is 
important in wet or other aggressive environments, especially for cables which do not have extruded KS 194: 1990                   ©KEBS    
 20 bedding.  Unprotected open ends should  not be exposed to moisture prior to final termination or 
jointing.  
 
The possibility of damage to moisture seals during handling and installation of the cable should be 
borne in mind.  Where such damage may have occurred the seals should be inspected and r e-made 
if necessary.  
 
B5. EARTHING BONDS AND CLAMPS  
 
Owing to the absence of a metal sheath, all earth fault currents will return through the armour unless 
there is a parallel bonding connection to relieve the armour of some of the fault current.  In eithe r 
event, it is necessary to ensure that there is no discontinuity in the return circuit via the armour, and 
there is no local spot of high resistance.  
 
Careful attention, therefore, should be paid to the design of all bonding clamps in joints and 
terminati ons to ensure that each armour wire or strip contributes equally to the conductance of the 
bonding connection and that the resistance across a connector is not higher than that of the 
equivalent length of connected armour of the cable.  
 
It is also importan t to ensure that all armour (wires or strips) and all faces of armour clamps or 
connections making contact with them are thoroughly cleaned during installation, and that the 
clamps are adequately tightened to ensure good electrical contact.  
 
Bonding clamps  in joints should be electrically connected with a bond having a conductance at least 
equal to that of an equal length of the complete armour of the cable, and with adequate thermal 
capacity to avoid excessive over -heating under short -circuit conditions.  The shell of a cast iron box 
is normally sufficient for this purpose but an auxiliary metallic bond should be included if there are 
any doubts concerning its conductance.  
 
B6. COMPOUND FILLING  
 
Joints and sometimes terminations require filling with specifi ed compounds to seal against wet or 
hazardous environments.  When a hot pouring compound is used, care should be taken that at the 
time of pouring the temperature of the compound does not exceed 1500C. 
 
B7. EARTHING OF ARMOUR  
 
Provision should be made for earthing the armour to the main earth system at the supply end by 
means of a metallic bond of adequate conductance, the bonding connection being as short as 
possible.  It is also desirable to earth the armour at additional positions such as at joints.  
 
Special precautions may be necessary to eliminate the risk of corrosion due to the use of dissimilar 
metals.  
 
B8. TEST AFTER INSTALLATION  
 
A voltage test after installation is not a requirement of this Kenya Standard, but if a test is made, it 
should be carri ed out with a direct current, the value of the voltage being that specified in Table 28.. 
During the test, the voltage should be increased gradually to the full value and maintained 
continuously for 15 min between conductors and between each conductor and the armour.  No 
breakdown should occur.  
 
 
TABLE 28.  TEST VOLTAGE AFTER INSTALLATION  
 
CABLE VOLTAGE 
DESIGNATION  D.C. TEST VOLTAGE  
Between 
Conductors  Between all  
Conductors and  
Armour  
V 
600/1 000  
 
1 900/3 300  V 
3 500  
 
10 000  V 
3 500  
 
7 000  ©KEBS                                                                            KS 194: 1990
     
 21  
 
 
A P P E N D  I X  C  
 
INFORMATION REQUIRED WITH ENQUIRY AND ORDER  
 
 NOTE:  See Appendix A for recommendations for the selection of cables.  
 
 The following information should be given with an enquiry or order.  
 
(a) The number of this Kenya Standard, i.e. KS 04 -194. 
 
(b) The leng th of cable required and, if important, individual drum lengths.  
 
(c) the voltage designation ( see Clause 3 and A2).  
 
(d) The number of cores.  
 
(e) The conductor size and, where applicable, the size of the reduced neutral conductor.  
 
NOTE:  These sizes depend upon vari ous factors, details of which are given in KS 04 -662. 
 
(f) The conductor material, i.e. copper or aluminium.  
 
(g) The type of finish, i.e.:  
 
(i) Unarmoured.  
 
(ii) Armoured with aluminium wire (single -core only), steel wire or aluminium strip.  
 
(iii) Whether taped or extruded bed ding (where applicable) is required for armoured 
cables.  
 
NOTE:  This will depend on the conditions of installation and in particular on whether the 
environment is especially onerous, e.g. aggressive or wet.  In vases of doubt, advice should be 
sought from the cable manufacturers.  
 
 
 
 
 
 
 
 
 
A P P E N D I X  D  
 
MECHANICAL TESTS  
 
 
D1. MEASUREMENT OF DIAMETER OF ROUND WIRE  
 
Take at random 10 per cent of the total number of wires from one sample of the completed cable.  
Determine the diameter of each wire with a micrometer by taking two measurements at right angles 
to each other.  Take the average of all measurements to be the wire diameter.  
 
D2. MASS OF ZINC COATING OF GALVANIZED STEEL WIRE  
 
Take at random 10 per cent of the total number of wires from one sample of completed cable.  
Determine the mass of zinc by either a gravimetric or gas volumetric method as specified in KS 06 -
261*.  Take the average of all the measurements to be the mass of zinc coating.  KS 194: 1990                   ©KEBS    
 22  
D3. WRAPPINF TEST FOR GALVANIZED STEEL WIRE  
 
Take at ran dom 10 per cent of the total number of wires from one sample of completed cable.  Wrap 
each wire round a cylindrical mandrel for one complete turn.  The mandrel shall have a diameter of 
approximately four times the specified wire diameter under test.  
 
D4. TENSILE TEST FOR ALUMINIUM WIRES AND STRIPS  
 
Take at random 10 per cent of the total number of wires or strips from one sample of completed 
cable.  Measure the tensile strength of each wire or strip in accordance with Clause of KS 04 -290†.  
Take the averag e of all the measurements to be the tensile strength.  
 
D5. MEASUREMENT OF THE DIMENSIONS OF ALUMINIUM STRIP ARMOUR  
 
Take at random 10 per cent of the total number of strips from one sample of completed cable.  
Measure the thickness and width of each strip using a dial micrometer or vernier caliper.  Take the 
average of all the measurements to be the thickness of width of the strip, as appropriate.  
 
 
_________________________________________________________________________________  
 
*  Specification for steel  wires and wire products used for fencing.  
 
 †  Specification for galvanized steel wire for armouring of electric cables.  
 
 
 
A P P E N D I X  E  
 
RESISTANCE OF CONDUCTOR AND ARMOUR, AND ARMOUR CROSS -SECTIONAL AREAS  
 
E1. RESISTANCE OF CONDUCTOR AND ARMOUR  
 
Tables 29 to 33 contain maximum values of the resistance of aluminium wire, aluminium strip and 
single, galvanized steel wire armour for single -core and multi -core cables with rated voltages of 
600/1 000 V and 1 900/3 300 V as designated in Tables 11 to 25.  
 
E2. GROSS CROSS -SECTIONAL AREA OF ARMOUR  
 
Tables 29 to 37 contain gross cross -sectional areas of armour for use in calculating the maximum 
permissible fault current to comply with the relevant Clause of KS 04 -662. 
 
 
 
ANNEX F  
 
 ©KEBS                                                                            KS 194: 1990
     
 23