UNE 21170-4-2:1993

COMMON TEST METHODS FOR INSULATING AND SHEATHING MATERIALS OF ELECTRIC CABLES. PART 4: METHODS SPECIFIC TO POLYETHYLENE AND POLYPROPYLENE COMPOUNDS. SECTION TWO: ELONGATION AT BREAK AFTER PRE-CONDITIONING. WAPPING TEST PRE-CONDITIONING. WRAPPING TEST AFTER THERMAL AGEING IN AIR. MEASUREMENT OF MASS INCREASE LONG-TERM STABILITY TEST (APPENDIX A). TEST METHOD FOR COPPER CATALYSED OXIDATIVE DEGRADATION (APPENDIX B).