What are Cold Impact and Cold Bending Testing?

Cold impact and cold bending testing are generally accepted industry standards that predict the behavior of electrical cables in cold weather. Cold bending testing determines the flexibility of the electrical cable when bent in cold temperatures, while cold impact testing determines whether the cable is prone to damage at a certain temperature. There are different temperatures for cold impact and cold bending testing, with -60 °C being one of the most common. If you want the cable that will surely perform well in cold conditions, go with the one that passes cold impact and cold bending tests.

Operating Temperatures Of Common Types Of Insulations

The operating temperature of the cable refers to the minimum and maximum temperatures in which a cable can adequately operate for an unlimited timespan. This is an important criterion when picking wire and cable for a particular application. Operating temperatures are variable and may depend on the manufacturer of a particular cable.

    PVC: -15°C to 70°C.
    PE: -65°C to +75°C
    XLPE: -65°C to +90°C
    Silicone rubber: -60°C to 180°C
    EPR: -50°C to +120°/150°C
    EPDM: -50°C to +120°/150°C
    CPE: –18°C to 105°C
    PTFE: -240°C to 290°C


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IEC 60811-506:2012 
Electric and optical fibre cables - Test methods for non-metallic materials - Part 506: Mechanical tests - Impact test at low temperature for insulations and sheaths

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IEC 60811-504:2012 
Electric and optical fibre cables - Test methods for non-metallic materials - Part 504: Mechanical tests - Bending tests at low temperature for insulation and sheaths

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