In accordance with NETA Maintenance Specifications, what is the appropriate DC Test Voltage for 15kV Extruded Dielectric Shielded Power Cables with 173% Insulation Level?

The appropriate DC test voltage for 15kV extruded dielectric shielded power cables with a 173% insulation level is indeed 20kV. This is based on industry standards that specify testing voltages in relation to the cable's rated voltage and insulation level.

For cables with a 15kV rating, the insulation is typically designed to withstand a testing voltage that is significantly higher than the rated voltage to ensure reliability under normal operating conditions. The 173% insulation level indicates a robustness that allows for higher test voltages, specifically the 20kV, which is often the standard for cables of this voltage rating. This testing helps to identify any weaknesses or defects in the insulation that could lead to failure in the field.

The other options do not align with the standard testing practices for this type of cable. A voltage of 11kV would be insufficient for such a high insulation level, while 14kV, although closer, still does not meet the established testing requirements. A voltage of 33kV exceeds the necessary level, risking potential damage to the cable insulation during testing. Thus, 20kV is the correct and safe testing voltage for validating the integrity of 15kV cables with a 173