Tables / Explanations AWG-Sizes - Prysmian Group

Electrical parametersVoltagesFor the rated, operating and test voltages of cables,the definitions given in DIN VDE 0298, Part 3, apply.Some of these are mentioned in table 4/3 below.AC - alternating currentDC - direct currentRated voltageThe rated voltage of an insulated electric cable is thevoltage which is used as the basis for the design andthe testing of the cable with regard to its electricalcharacteristics.In a system with AC voltage, the rated voltage ofa cable must be at least equal to the rated voltageof the system for which it is used. This requirementapplies both to the value Uo and the value U.In a system with DC voltage, its rated voltage mustnot be more than 1.5 times the value of the ratedvoltage of the cable.as for example with CORDAFLEX and PLANOFLEXcables,“core against core“ is tested in appropriatecombinations. The values are to be regarded as ACtest voltages (unless stated otherwise) for singlephasetesting, i.e. the AC test voltage is appliedbetween the core and the corresponding shielding(e.g. semiconductive layer, earth conductor, shield).Telecommunication cores (pairs) and other shieldedpairs (e.g. (2x1)C) are tested „core against core“ and„core against shield“ whereby the test voltages arecorrespondingly different.With single-core cables without shielding, thecorresponding opposite pole is a water bath.Please see table 4/3 on the next page.Operating voltageThe operating voltage is the voltage applied betweenthe conductors and earth of a power installationwith respect to time and place with trouble-freeoperation.> Cables with a rated voltage up to 600 V Thesecables are suitable for use in three-phaseAC, single-phase AC and DC installations, themaximum continuously permissible operatingvoltage of which does not exceed the ratedvoltage of the cables by more than 10% forcables with a rated voltage up to and including450 V 10% for cables with a rated voltageup to 450 V and 20% for cables with a ratedvoltage 600 V.> Cables with a rated voltage greater than 600V These cables are suitable for use in threephaseand single-phase AC installations, themaximum operating voltage of which does notexceed the rated voltage of the cable by morethan 20%.> Cables in DC installations If the cables areused in DC installations, the continuouslypermissible DC operating voltage between theconductors must not exceed 1.5 times thevalue of the permissible AC operating voltage.In single-phase earthed DC installations, thisvalue should be multiplied by a factor of 0.5.Test voltageRegarding the test voltage of flexible cables, thevalues given in the corresponding parts of DINVDE 0250 apply. If the relevant shield is missing,