ASTM 2655:17 pdf download

ASTM 2655:17 pdf download.Standard Specification for Crosslinked Polyethylene Insulation for Wire and Cable Rated 0 to 2000 v.
4.4.4 Determination of gel content is the reference Test Method in case of a dispute. and the test is conducted in accordance with Standard Test Method D2765. Meet the percent extractable requirements specified in Table 1.
4.5 Test Applicable for Sunlight and Weather Resistant
Materials:
4.5. 1 Test in accordance with ‘Weatherability for Colored Materials (including white and black)” in Specification D1248. Prepare the specimens in accordance with Test Methods D0470 for physical tests of insulations and jackets (physical test procedures section). THE SPECIMENS SHALL MEET THE REQUIREMENTS FOR CLASS C OR CLASS D IN SPECIFICATION DI 248.
5. Electrical Requirements
5. 1 Order of Testing—Perform the ac voltage, insulation resistance, and dc voltage tests in that order when any of these tests arc required. The sequence for other testing is not specified.
5.2 AC Voltage Test—Conduct the tests in accordance with Test Methods D470. Subject wires and cables to an ac test voltage for a period of 5 mm. Unless otherwise specified, omit this test if the de voltage test described in 5.4 is to he performed. Test at a voltage of 100 V/mil [4 kV/mmj based on the specified nominal thickness of insulation for the rated circuit voltage, phase to phase.
5.3 Insulation Resistance—The insulated conductor shall have an insulation resistance equal to or greater than that corresponding to a constant of 10 000 at 60°F [15.6°C]. Whenthe temperature of the water in which the insulation is testeddiffers from 60°F, apply a correction factor.Table 2 of TestMethods D470 contains the correction factors. Each insulationmanufacturer can furnish the 1F coefficient for the insulationmaterial by using the procedure given in Test Methods D470.Multiply the measured value by the correction factor to obtainthe insulation-resistance value corrected to 60°F.
5.3.1 Where a nonconducting separator is applied betweenthe conductor and insulation or where an insulated conductor iscovered with a nonmetallic jacket so that the insulationresistance can be measured only on the completed assembly,the required insulation resistance shall be at least 60 % of thatrequired for the primary insulation based on the nominalthickness of that insulation.
5.4 DC Voltage Test—Upon completion of the insulationresistance test,each unshielded insulated conductor shallwithstand for 5 min a dc test voltage which is three times theac test voltage specified in 5.2.Unless otherwise specified,omit this test if the ac voltage test described in 5.2 has beenperformed.
5.5 Accelerated Water Absorption Requirements——Test inaccordance with the Accelerated Water Absorption Tests in TestMethods D0470.Conduct the Electrical Method Test at 60 Hzwith the water temperature at 75 ±1C.The insulation shallmcet the requirements of Table 2.
6.Sampling
6.1 Unless otherwise instructed,sample the insulation inaccordance with Test Methods D470.
7.Test Methods
7.1 Unless otherwise instructed, test the insulation in accor-dance with Test Methods D470.
8. Keywords
8.1 ac voltage;crosslinked polyethylene; dc voltage; heatdistortion; hot creep; hot set; insulation resistance; sunlight andweather resistant; water absorption.