VDE test EN 60900 Cold-heading test Testing the adhesive strength of the PVC coating In this test, the toughness of the PVC material is checked by dropping a weight on to the tools which have been cooled down to -25 °C. The tools must not show any cracking or other damage after the test. After pliers have been stored for 168 hours at +70 °C, the adhesive power of the PVC coating is tested using a pulling force of 500 Nm. The insulation material must stay firmly attached to the basic tool. Flame resistance test Pressure test To exclude any fire risks, only flame-proof PVC material is used. No puncture must occur, while testing the tool with a voltage of 5.000 V AC when also applying a pressure of 20 Nm at a tempera- ture of +70° C to the tool. Testing the insulating properties Voltage test After storing the tools under water for 24 hours, the tools are tested using 10.000 V AC for three minutes, while simultaneously measuring the discharge current. During this time, no puncture or sparkover must occur. Each safety tool is individually voltage tested. This means that all tools which bear the rele- vant mark have been tested at 10.000 V AC and are approved for a voltage of 1.000 V, ensuring 10-fold safety.