Electrician scissors with insulation 38 mm insulation with a dip coat Two layers of safety insulation with color coding According to IEC 609002, multi-layer coating with distinct colors designating safety or danger is appropriate for working on live equipment up to 1000 volts. This establishes a visual warning system in addition to offering protection. The user will be alerted if the outer layer of insulation is damaged because the lighter color underneath will show through. At the conclusion of the manufacturing cycle, every single tool is tested to 10,000V for 10 seconds.