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Cold Impact Cable Test

Cold Impact Testing is conducted according to international standard IEC 60811-506, and is designed to assess the performance of electrical cables at low temperatures. The test is carried out on samples of cable insulation and sheathing material but no less than 16 hours after the extrusion or cross-linking process has been carried out. 

The cold impact cable test methodology requires a low temperature chamber capable of maintaining the specified test temperature and bending apparatus as described in IEC 60811-506. The test requires three pieces of complete cable, each having a length at least five times the diameter of the cable with a minimum of 150mm. The test apparatus (shown below) is placed on a pad of sponge rubber about 40mm thick and held in the low temperature cabinet before and during the test.


Cold Impact Cable Testing


Cold Impact cable testing on power cables for fixed installations specifies the mass of the hammer for testing the samples as not being less than the values as given in Table 1.


Table 1 - Mass of hammer for power cables in fixed installations

Overall diameter (mm) Mass of Hammer (g)
up to 4.0 100
4.1 to 6.0 200
6.1 to 9.0 300
9.1 to 12.5 400
12.6 to 20.0 500
20.1 to 30.0 750
30.1 to 50.0 1000
50.1 to 75.0 1250
75.1 and over 1500


Whilst the mass of the hammer for cold impact cable testing for flexible cables and telecommunications cables shall not be less than the values shown in Table 2.


Table 2 - Mass of hammer for flexible cables and telecommunications cables

Overall diameter (mm) Mass of Hammer (g)
Flat cables 100
Up to 6.0 100
6.1 to 10.0 200
10.1 to 15.0 300
15.1 to 25.0 400
25.1 to 35.0 500
35.1 and over 600


The apparatus and the pieces of cable to be tested are placed side by side the low temperature cabinet which is maintained at the temperature specified in the standard. The contents of the refrigerator shall then be allowed to cool for a minimum period of 16 hours. If the apparatus has been pre-cooled, a shorter cooling period is permissible, but not less than 1 hour, provided that the test pieces have attained the prescribed test temperature. At the end of the prescribed periods, each piece in turn shall be placed into the cold impact test apparatus and the hammer allowed to fall from a height of 100mm.

To be compliant with and pass the Cold Impact Test, the cable insulation or sheathing material must not show any cracks when visually inspected without magnification. 



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The Cable Lab®

UKAS-accredited specialist cable testing laboratory

About Eland Cables

The Cable Lab® our in-house cable testing facility, is UKAS-accredited to ISO 17025, which is the single most important standard for calibration and testing laboratories around the world. Accreditation to this international standard demonstrates our laboratory's technical competence and the accuracy of its results.

For our customers, it means peace of mind. They can have full confidence in the quality of our products and can demonstrate due diligence in selecting their cable supplier.

Our customers can also rely on the Cable Lab's services for an independent, objective and comprehensive quality assessment of cables procured from third parties.


About Eland Cables

About Eland Cables

Established in 1975, Eland Cables is a supplier of power, data, instrumentation and control cables and cable accessories to the world's most demanding industries and to some of its most prestigious projects. Our reputation is built on an unswerving focus on quality, technical expertise and customer service.


Our focus on quality has resulted in our in-house specialist cable testing facility securing the ISO 17025 accreditation. This certifies the competence, impartiality and performance capability of our laboratory and its evaluations. In turn, it means peace of mind for our customers with regard to the quality of the cables they source from us.

Expert tecHnical support

Our highly-qualified technical team is on hand to provide technical support with all aspects of cable selection, technical specification, regulatory requirements, and bespoke cable design and manufacture.

Complete Cable Solutions

We are a key contributor to projects in over 100 countries every year, adding value through comprehensive technical support, reliable logistics, innovative solutions, and a customer-centric approach.