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Oil Immersion Testing for Cables

IEC 60811 Part 404 specifies the method for a mineral oil immersion test, which typically applies to cross-linked compounds used for sheathing materials. The purpose of the oil immersion test is to determine whether the material can be classified as oil resistant.

IEC60811-404 dictates that this test must be carried out a minimum of 16hrs after the extrusion or any cross-linking process applied to the sheathing material compounds. As such, it is suitable for testing in our laboratory. 

The test methodology states that five test pieces shall be prepared in accordance with the procedures described in BS EN/IEC 60811-501, the test for cable tensile and elongation measurement. The test pieces are immersed in an oil bath which has been previously heated to the specified test temperature, and then the samples are maintained in the oil at temperature for the specified time. The mineral oil to be used shall be oil no. 2 (IRM 902) as described in ISO 1817.

At the end of the specific duration, the test pieces are removed from the oil, blotted lightly to remove excess oil, and suspended in air at ambient temperature for at least 16hrs but not more than 24hrs. At the end of this period, any further excess oil shall be removed by lightly blotting the test pieces.

The test pieces are then subjected to tensile and elongation measurement in accordance with BS EN/IEC 60811-501. The difference between the median value obtained on the five test pieces immersed in oil and the median value obtained for comparison untreated test pieces (expressed as a percentage of the latter), shall not exceed the percentage specified in the standard for the type of cable.

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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.

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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.

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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.