ISBN 978-0-626-33970-8 SOUTH AFRICAN NATIONAL STANDARD Electric flexible cables with solid extruded dielectric insulation Part 4: Rubber-insulated cables for domestic, office and similar environments (cords) WARNING This document references other documents normatively. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS
Table of changes Change No. Date Scope 2013 Amended to change the title, to include type R9 cords and requirements for solderability of plain conductors, to change requirements for core identification, to delete requirements for tinsel cords and separation resistance, to add specific requirements for type R5 cords, and to delete the dates in dated normative references where the dates were not required. Amdt 2 2017 Amended to update normative references. Foreword This South African standard was approved by National Committee SABS/TC 066, Electric cables, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was approved for publication in February 2017. This document supersedes SANS 1574-4:2013 (edition 1.1). A vertical line in the margin shows where the text has been technically modified by amendment No. 2. This document is referenced in the Compulsory specification for the safety of flexible cords for electrical appliances, as published by Government Notice No. 1079 (Government Gazette No. 33763) of 19 November 2010. SANS 1574 consists of the following parts, under the general title Electric flexible cables with solid extruded dielectric insulation: Part 1: General. Part 2: PVC-insulated cables for domestic, office and similar environments (cords). Part 3: PVC-insulated cables for industrial use. Part 4: Rubber-insulated cables for domestic, office and similar environments (cords). Part 5: Rubber-insulated cables for industrial use. Annex A forms an integral part of this document. Annexes B and C are for information only. Compliance with this document cannot confer immunity from legal obligations.
Contents Page Foreword 1 Scope... 3 2 Normative references... 4 3 Definitions... 4 4 General requirements... 4 5 Specific requirements for types of rubber-insulated flexible cord in common use... 9 5.1 Types... 9 5.2 Type R1 Rubber-insulated, braided flexible cords, 300/300 V circular two-core or three-core... 10 5.3 Type R2 Rubber-insulated, braided, heat-resistant flexible cords, 300/300 V circular two-core and three-core (H03RT-F)... 10 5.4 Type R3 Rubber-insulated, rubber-sheathed, normal duty flexible cords, 300/500 V circular two-core, three-core, four-core and five-core: Type RS1 sheath (H05RR-F) and type RS2 sheath (H05RN-F)... 11 5.5 Type R4 Rubber-insulated, braided, rubber-sheathed, normal duty, unkinkable, heat-resistant flexible cords, 300/500 V circular two-core and three-core... 14 5.6 Type R5 Silicone-rubber-insulated, braided, heat-resistant cords, 300/500 V single-core and twisted two-core (H05SJ-K)... 15 5.7 Type R6 Rubber-insulated, HOFR-sheathed, heat-resistant flexible cords, 300/500 V circular two-core, three-core and four-core... 15 5.8 Type R7 Silicone-rubber-insulated and rubber-sheathed normal duty, heat-resistant flexible cords, 300/500 V two-core and three-core (H05SS-F)... 17 5.9 Type R8 Silicone-rubber-insulated, light duty, heat-resistant flexible cords, 300/300 V single-core (H03S-F)... 18 5.10 Type R9 Silicone-rubber-insulated, light duty, heat-resistant flexible cords, 300/500 V single-core (H05S-F)... 18 6 Inspection and methods of test... 19 Annex A (normative) Notes to purchasers... 24 Annex B (informative) Guide to the use of insulated flexible cords.... 24 Annex C (informative) System for designation of harmonized cables and cords.... 27 1
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Electric flexible cables with solid extruded dielectric insulation Part 4: Rubber-insulated cables for domestic, office and similar environments (cords) 1 Scope 1.1 This part of SANS 1574 specifies requirements for single-core and multi-core flexible rubberinsulated cords of rated operating voltages up to and including 300 V to earth and 500 V between conductors, intended for use with electrical appliances. Insulating and sheathing materials of rubber are also covered. 1.2 This part of SANS 1574 covers requirements for the following types of rubber-insulated cord: a) type R1: normal duty, with individually braided cores, 300/300 V; b) type R2: normal duty, braided overall, heat-resistant cores, 300/300 V (H03RT-F); c) type R3: normal duty, sheathed cores, 300/500 V (H05RR-F and H05RN-F); d) type R4: normal duty, braided and rubber-sheathed, unkinkable, heat-resistant cords, 300/500 V; e) type R5: normal duty, braided overall, heat-resistant, single-core and twisted two-core cords 300/500 V (H05SJ-K); f) type R6: normal duty, HOFR-sheathed, heat-resistant cords, 300/500 V; g) type R7: normal duty, silicone-rubber-insulated, sheathed, heat-resistant cords, 300/500 V (H05SS-F). h) type R8: light duty, silicone-rubber-insulated, heat-resistant, single-core cords 300/300 V (H03S-F); and i) type R9: light duty, silicone-rubber-insulated, heat-resistant, single-core cords 300/500 V (H05S-F). NOTE 1 Requirements to be specified by the purchaser are listed in annex A. NOTE 2 A guide to the use of insulated flexible cords is given in annex B. NOTE 3 A system for the designation of harmonized cables and cords is given in annex C. 3