AMENDMENT OF MALAYSIAN STANDARD MALAYSIAN STANDARD MS :2009

Transcription

1 MS :2009, AMD. 1:2015 AMENDMENT OF MALAYSIAN STANDARD MALAYSIAN STANDARD MS :2009 ELECTRIC CABLE AND WIRE - POLYVINYL CHLORIDE (PVC) INSULATED CABLES OF RATED VOLTAGES UP TO AND INCLUDING 450/750 V - PART 1: GENERAL REQUIREMENTS (1) CSubcause 4.4, page 4 Delete 1 ST sentence of last paragraph and substitute with the following: The minimum thickness at any place shall not fall below 85 % of the specified value by more than 0.1 mm. (2) Subclause 5.1, page 4 Delete clause 5.1 a) and substitute with the following: a) name of manufacturer / trademark / brand; Insert the following before the last paragraph: Cables with conductor size 1.25 mm² shall be marked with MAX. 13AMP. in addition to the above details. (3) Clause 7 g), page 5 Delete clause 7 g) and substitute with the following: g) name of manufacturer / trademark / brand; Page: 1 of 7

2 (4) Table 1, page 7 Delete Table 1 and replace by existing Table 1 below: Table 1. Requirements for the non-electrical tests for PVC insulation Ref. no. 1 Tensile strength and elongation at break 1.1 Properties in the state as delivered: Test Unit Type of compound Test method C - 70 D- 70 E-90 E-105 Standard Subclause Values to be obtained for the tensile strength: - median, minimum N/mm² Values to be obtained for the elongation at break: 1.2 Properties after ageing in air oven and and Ageing conditions: - temperature ºC 80 ± 2 80 ± ± ± Values to be obtained for the tensile strength: - median, minimum N/mm² Values to be obtained for the elongation at break: 2 Loss of mass test 8.1 Page: 2 of 7

3 2.1 Ageing conditions: - temperature ºC 80 ± 2 80 ± ± ± Values to be obtained for the loss of mass, maximum mg/cm² Compatibility test 2) 3.1 Ageing conditions ºC 80 ± 2 80 ± ± ± 2 h 7 x 24 7 x x x Mechanical properties after ageing Values to be obtained As in references nos and Heat shock test Test conditions: - temperature ºC duration of treatment h Results to be obtained Absence of cracks Pressure test at high temperature 5.1 Test conditions: - force exercised by the blade See of - duration of heating under load See of - temperature ºC 80 ± 2 70 ± 2 90 ± ± Results to be obtained: - median of the depth of penetration, maximum % Thermal stability test Test conditions: - temperature ºC ± ± 0.5 Page: 3 of 7

4 6.2 Result to be obtained : - mean value of the thermal stability time, minimum min ) 2) Only applicable when called up by the particular cable standard. Only applicable when called up by the particular cable standard. Page: 4 of 7

5 (5) Table 2, page 9 Delete Table 2 and replace by existing Table 2 below: Table 2. Requirements for the non-electrical test for PVC sheath Ref. no. 1 Tensile strength and elongation at break 1.1 Properties in the state as delivered Test Unit Type of compound Test method ST4-70 ST5-70 ST10-90 ST Tensile strength: - median, minimum N/mm² Elongation at break Standard Subclause Properties after ageing in the air oven Ageing conditions: temperature ºC 80 ± 2 80 ± ± ± Tensile strength: - median, minimum N/mm² elongation at break: 2 Loss of mass test Ageing conditions: - temperature o C As in reference no Page: 5 of 7

6 2.2 Lost of Mass, maximum mg/cm² Compatibility test 1) Ageing conditions: - temperature ºC As in reference no Mechanical properties after ageing Values to be obtained As in reference nos and Heat shock test 4.1 Test conditions: - temperature ºC 150 ± ± ± ± 2 - duration of test h Result to be obtained Absence of cracks 5 Pressure test at high temperature Test conditions: - force exercised by the blade duration of heating under load h temperature ºC 80 ± 2 70 ± 2 90 ± ± Results to be obtained: - median of the depth of penetration, maximum % Mechanical properties after immersion in mineral oil Test conditions: - temperature of oil ºC duration of immersion in oil h Tensile Strength: Page: 6 of 7

7 - variation, maximum 2) % ± elongation at break: 2) - variation, maximum % ±25 7 Minimum thermal stability at 200 ºC Results to be obtained: - mean value of the thermal stability time 2) Only applicable when called up by the particular cable standard Page: 7 of 7