Insulation Tensile Strength and Elongation
This test provides tensile property data on extruded electrical wire insulation removed from the wire/cable specimen. Identifying the insulation's tensile properties are useful to determine the ability to withstand mechanical stresses the wire/cable may experience in service conditions. Using a power driven tensile test machine, the insulation is stretched until breakage. At the end of the test, the average wire/cable insulation tensile strength and elongation is identified.
Depending on the particular needs of the client, it may be beneficial to perform comparison testing of tensile properties before and after the environmental or thermal exposure. The potential benefit of this is to determine the extent of insulation degradation due to the environmental exposure.
Procedure
- Perform visual examination of the specimen. Record any defects.
- Remove all conductor stands from the wire.
- Place specimen into the dynamic force apparatus and perform test.
- Record the burst strength value.
Covered specifications
- ANSI NEMA WC27500
- AS4373 Method 705
- AS5382 Method 5.5.7
- AS81044 Method 4.7.5.7
- AS85485 Method 4.7.16
- ASTM D3032 Section 17
- FED-STD-228 Method 3031
- MIL-STD-2223 Method 2001
- MIL-W-81822 Method 4.6.10
- A-A-59826A
- AS23053 Rev A Method 5.12.2
- AS23053 Rev A Method 5.13
- AS654 Method 5.3.3
- ASTM B267 Method 5
- ASTM B33 Method 8.1.1
- ASTM B452 Method 7.1
- ASTM D3032 Method 16
- ASTM D4565 Method 13
- ESLU5T-1A263-AA Method 6.1
- ICEA S-81-570 Method 5.2 Part 1
- ICEA S-81-570 Method 5.2 Part 2
- IS 10810 Method 7
- MIL-DTL-24643D Method 4.8.28
- MIL-DTL-915 Method 4.5.14
- MIL-M-24041 Method 4.7.3.05
- MIL-PRF-85045G Method 4.7.5.1
- NEMA HP-3 Method 6.1.3