ASTM D 2656 : 2020

1.1This specification covers a crosslinked polyethylene insulation for electrical wires and cables for conductor sizes 8AWG (8.37 mm²) and larger. The base polymer of this insulation consists substantially of polyethylene.

1.2This type of insulation is suitable for use on power cables in wet and dry locations at conductor temperatures not exceeding 90 °C for continuous operation, 130 °C for emergency overload conditions, and 250 °C for short-circuit conditions. It is considered suitable for all sizes and voltage classifications of single- and multiple-conductor power cables at voltage ratings of 2001 to 35000V phase-to-phase at the 100 % insulation level and at voltage ratings of 2001 to 25000V at the 133 % insulation level as listed in Table 1C of Test Methods D470.

1.3Materials covered by this specification are not sunlight- and weather-resistant unless they are carbon black pigmented or contain an additive system designed for this protection.

1.4In many instances the insulation cannot be tested unless it has been formed around a conductor. Therefore, tests are done on insulated wire in this standard solely to determine the relevant property of the insulation and not to test the conductor or completed cable.

1.5Whenever two sets of values are stated, in different units, the values in the first set are regarded as standard, while the values in parentheses are provided for information only and are not considered standard.

1.6This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.