UL-1650:2015 pdf free download – STANDARD FOR SAFETY Portable Power Cable.
8.10.2 Insulation resistance for all indoor cables
8.10.2.1 The insulation resistance between each insulated conductor and between the insulated conductors and any other conductive components and ground shall be not less than 2.5 Mohm•1 000 ft (0.76 Gohm.m) at 15°C (59°F) when a specimen of the finished cable at least 50 ft (15 m) in length is tested in air after conditioning for at least 6 hours and immediately following the dielectric strength test described in 8.9.
8.10.3 Test method
8.10.3.1 Compliance with all insulation resistance tests shall be determined in accordance with the test, Insulation resistance, and Annex E (Determination of temperature correction factor) in UL 2556.
8.11 Durability of ink printing
8.11.1 Surface-printed legends shall be complete and legible after two samples have been tested in accordance with the test, Durability of ink printing, in UL 2556. One sample shall be conditioned at the dry rated temperature of the sample for 24 hours.
8.12 Capacitance and relative permittivity
8.12.1 The insulation, without the protective covering, of wet-rated single-conductor cable and of the individual single conductors of multiple-conductor cable immersed in water at the rated temperature of 75°C or 90°C (167 or 194°F), shall comply with each of the following:
a) The relative permittivity determined after immersion for 24 hours shall be 6.0 or less for EP and XL insulations, and shall not be more than 10 for TPE insulation.
b) The capacitance for TPE, EP, and XL insulations after immersion for 14 days shall be no more than 10 percent higher than the capacitance after a 24 hour immersion.
c) The capacitance determined for EP and XL insulations after a 14 day immersion shall be no more than 4 percent higher than the capacitance determined after immersion for 7 days for EP and XL insulations and not more than 5 percent higher for TPE insulation.
8.12.2 Compliance shall be determined in accordance with the test, Capacitance and relative permittivity, in UL 2556.
8.13.1.3 Any coil that shows a greater percent decrease in insulation resistance during the extended immersion period may be tested for additional 1 week immersion periods and judged on the basis of the results for every continuous period of 3 weeks during the last 6 weeks of immersion, provided that the final insulation resistance is not less than calculated.
8.13.1.4 Compliance with 8.13.1.1 — 8.13.1.3 shall be determined in accordance with the test, Long-term insulation resistance (Method 1), in UL 2556.
8.13.2 Thermoplastic elastomer insulation
8.13.2.1 The insulation of wet-rated single-conductor cable and of the individual single circuit conductors of multiconductor cable and the grounding conductors from Type PPF shall have insulation resistance at the rated temperature in tap water not less than calculated as indicated below at any time during immersion, in accordance with the test, Insulation resistance, in UL 2556.