Under the new standards, the insulating protective outsole pattern excluding the thickness of not less than 4 mm, patterns can not be measured, the thickness of not less than 6 mm.
  The current market, in order to replace the insulation safety shoes soles life phenomenon often appears. Is the thinnest part of the sole, but also reach 6 mm. Enterprises purchased insulated safety shoes uppers or soles should be standard number, lettering and voltage insulation value. Insulating safety shoes enterprises should understand the manufacturer's qualification situation.
  Electrical insulating shoe outsole wear track length should be no greater than 10mm; electrically insulating cloth shoes abrasion loss of not more than 1.4cm3; 15kv and electrically insulated rubber boots at the abrasion loss of not more than 1.0cm3; 20kv and above wear electrically insulated rubber boots reduction of not more than 1.9cm3.