Air-Con Trunking | Test Specification

Singapore Standard 275 : 1999
Test Specification for Cable and Air-Conditioning Trunking Made of Insulating Material
Clause
Test Required
Mechanical Properties
Cable Supporting Test for surface mouting

Temperature
Duration
Distortion (Max)




60 ± 2°C
2 hr
10%
Impact Test

Precondition
Duration
Test Temperature
Mass of Hammer
Height of Impact


60 ± 2°C
240 hr
15°C
2 kg
100 mm
Cover Retention Test

Mass attached to Cover
Duration of Test


2 kg
60 sec
Resistant to Heat

Testing Temperature
Applied force of Ball Pressure
Duration of Test
Diameter of impression


60 ± 2°C
20 N
1 hr
< 2mm
 
Clause
Test Required
Resistant to Flame Propagation

Flame Test


Does not ignite or flames. Self extinguised within 30s after removal of flame.
Insulating Characteristics

Electric Insulating Strength Test

Applied Voltage
Duration of Electrification




2500V
1 min
Insulation Resistance test

Applied Voltage
Duration of Electrification


500V dc
1 min